Merge pull request #324 from xushiwei/q

packages.LoadEx: support Deduper

.github/workflows/go.yml

@@ -11,45 +11,38 @@ on:
 
 jobs:
 
-  test-macos:
-    runs-on: macos-latest
+  test:
     strategy:
       matrix:
+        os: [macos-latest, ubuntu-latest]
         llvm: [17]
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
 
       - name: Update Homebrew
-        if: matrix.llvm == 17 # needed as long as LLVM 17 is still fresh
+        # needed as long as LLVM 17 is still fresh
+        if: matrix.llvm == 17 && startsWith(matrix.os, 'macos')
         run: brew update
-      - name: Install LLVM ${{ matrix.llvm }}
-        run: HOMEBREW_NO_AUTO_UPDATE=1 brew install llvm@${{ matrix.llvm }}
-        
-      - name: Set up Go
-        uses: actions/setup-go@v5
-        with:
-          go-version: '1.20'
-
-      - name: Build
-        run: go build -v ./...
-
-      - name: Test
-        run: go test -v ./...
-
-  test-linux:
-    runs-on: ubuntu-20.04
-    strategy:
-      matrix:
-        llvm: [17]
-    steps:
-    - uses: actions/checkout@v4
-
-    - name: Install LLVM ${{ matrix.llvm }}
+      - name: Install LLVM ${{ matrix.llvm }} and bdw-gc
+        if: startsWith(matrix.os, 'macos')
+        run: |
+          HOMEBREW_NO_AUTO_UPDATE=1 brew install llvm@${{ matrix.llvm }} bdw-gc
+          echo `brew --prefix llvm@${{ matrix.llvm }}`/bin >> $GITHUB_PATH
+      - name: Install LLVM ${{ matrix.llvm }} and libgc-dev
+        if: startsWith(matrix.os, 'ubuntu')
         run: |
           echo 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-${{ matrix.llvm }} main' | sudo tee /etc/apt/sources.list.d/llvm.list
           wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
           sudo apt-get update
-        sudo apt-get install --no-install-recommends llvm-${{ matrix.llvm }}-dev
+          sudo apt-get install --no-install-recommends clang-${{ matrix.llvm }} llvm-${{ matrix.llvm }}-dev libgc-dev
+          echo /usr/lib/llvm-${{ matrix.llvm }}/bin >> $GITHUB_PATH
+    
+      - name: Clang information
+        run: |
+          echo $PATH
+          which clang
+          clang --version
         
       - name: Set up Go
         uses: actions/setup-go@v5
@@ -60,8 +53,38 @@ jobs:
         run: go build -v ./...
 
       - name: Test
+        if: matrix.os != 'macos-latest'
+        run: go test -v ./...
+
+      - name: Test with coverage
+        if: matrix.os == 'macos-latest'
         run: go test -v -coverprofile="coverage.txt" -covermode=atomic ./...
 
+      - name: Install
+        run: go install ./...
+      
+      - name: LLGO tests
+        if: matrix.os != 'ubuntu-latest'
+        run: |
+          echo "Test result on ${{ matrix.os }} with LLVM ${{ matrix.llvm }}" > result.md
+          LLGOROOT=$PWD bash .github/workflows/test_llgo.sh
+      
+      - name: Test _demo and _pydemo
+        run: |
+          set +e
+          LLGOROOT=$PWD bash .github/workflows/test_demo.sh
+          exit 0
+      
+      - name: Show test result
+        run: cat result.md
+
+      - name: PR comment with test result
+        uses: thollander/actions-comment-pull-request@v2
+        if: false
+        with:
+          filePath: result.md
+          comment_tag: test-result-on-${{ matrix.os }}-with-llvm-${{ matrix.llvm }}
+
       - name: Upload coverage reports to Codecov
         uses: codecov/codecov-action@v4
         with:

.github/workflows/test_demo.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+# llgo run subdirectories under _demo and _pydemo
+total=0
+failed=0
+failed_cases=""
+for d in ./_demo/* ./_pydemo/*; do
+  total=$((total+1))
+  if [ -d "$d" ]; then
+    echo "Testing $d"
+    if ! llgo run -v "$d"; then
+      echo "FAIL"
+      failed=$((failed+1))
+      failed_cases="$failed_cases\n* :x: $d"
+    else
+      echo "PASS"
+    fi
+  fi
+done
+echo "=== Done"
+echo "$((total-failed))/$total tests passed"
+
+if [ "$failed" -ne 0 ]; then
+  echo ":bangbang: Failed demo cases:" | tee -a result.md
+  echo -e "$failed_cases" | tee -a result.md
+  exit 1
+else
+  echo ":white_check_mark: All demo tests passed" | tee -a result.md
+fi

.github/workflows/test_llgo.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+set -e
+
+export LLGOROOT=$PWD
+
+testcmd=/tmp/test
+llgo build -o $testcmd ./_test
+cases=$($testcmd)
+total=$(echo "$cases" | wc -l | tr -d ' ')
+failed=0
+failed_cases=""
+
+for idx in $(seq 1 $((total))); do
+  case=$(echo "$cases" | sed -n "${idx}p")
+  case_name=$(echo "$case" | cut -d',' -f2)
+  echo "=== Test case: $case_name"
+  set +e
+  out=$("$testcmd" "$((idx-1))" 2>&1)
+  exit_code=$?
+  set -e
+  if [ "${exit_code:-0}" -ne 0 ]; then
+    echo "failed: $out"
+    failed=$((failed+1))
+    failed_cases="$failed_cases\n* :x: $case_name"
+  else
+    echo "passed"
+  fi
+done
+echo "=== Done"
+echo "$((total-failed))/$total tests passed"
+
+if [ "$failed" -ne 0 ]; then
+  echo ":bangbang: Failed llgo cases:" | tee -a result.md
+  echo -e "$failed_cases" | tee -a result.md
+  exit 1
+else
+  echo ":white_check_mark: All llgo tests passed" | tee -a result.md
+fi

.gitignore

@@ -9,7 +9,8 @@
 *.dylib
 
 test.db
-llgo_autogen.ll
+demo.ll
+llgo_autogen*.ll
 stories*.bin
 .DS_Store
 err.log

.gitmodules

@@ -1,3 +1,3 @@
-[submodule "x/llama2/llama2.c"]
-	path = x/llama2/llama2.c
+[submodule "c/llama2/llama2.c"]
+	path = c/llama2/llama2.c
 	url = https://github.com/karpathy/llama2.c.git

README.md

@@ -35,7 +35,7 @@ To run these demos (If you haven't installed `llgo` yet, please refer to [How to
 
 ```sh
 export LLGOROOT=`pwd`
-cd <demo-directory>  # eg. cd _demo/genints
+cd <demo-directory>  # eg. cd _demo/hello
 llgo run .
 ```
 
@@ -46,8 +46,9 @@ See [github.com/goplus/llgo/c](https://pkg.go.dev/github.com/goplus/llgo/c) for
 
 You can import a Python library in LLGo!
 
-And you can import any Python library into `llgo` through a program called `llpyg`. The currently imported libraries include:
+And you can import any Python library into `llgo` through a program called `llpyg` (see [Development tools](#development-tools)). The following libraries have been included in `llgo`:
 
+* [builtins](https://pkg.go.dev/github.com/goplus/llgo/py/std)
 * [sys](https://pkg.go.dev/github.com/goplus/llgo/py/sys)
 * [os](https://pkg.go.dev/github.com/goplus/llgo/py/os)
 * [math](https://pkg.go.dev/github.com/goplus/llgo/py/math)
@@ -55,6 +56,9 @@ And you can import any Python library into `llgo` through a program called `llpy
 * [inspect](https://pkg.go.dev/github.com/goplus/llgo/py/inspect)
 * [statistics](https://pkg.go.dev/github.com/goplus/llgo/py/statistics)
 * [numpy](https://pkg.go.dev/github.com/goplus/llgo/py/numpy)
+* [pandas](https://pkg.go.dev/github.com/goplus/llgo/py/pandas)
+* [pytorch](https://pkg.go.dev/github.com/goplus/llgo/py/torch)
+* [matplotlib](https://pkg.go.dev/github.com/goplus/llgo/py/matplotlib)
 
 Here is an example using the Python `math` library:
 
@@ -125,10 +129,10 @@ You can also specify the path to tell `llgo` where the Python library is located
 export LLGO_LIB_PYTHON=/foo/bar/python3.12
 ```
 
-For example, `/opt/homebrew/Frameworks/Python.framework/Versions/3.12/libpython3.12.dylib` is a typical python library location under macOS. So we should set it like this:
+For example, `/opt/homebrew/Frameworks/Python.framework/Versions/3.12/lib/libpython3.12.dylib` is a typical python library location under macOS. So we should set it like this:
 
 ```sh
-export LLGO_LIB_PYTHON=/opt/homebrew/Frameworks/Python.framework/Versions/3.12/python3.12
+export LLGO_LIB_PYTHON=/opt/homebrew/Frameworks/Python.framework/Versions/3.12/lib/python3.12
 ```
 
 Note that the file name must be written in a platform-independent format, using `python3.12` instead of `libpython3.12.dylib`.
@@ -148,44 +152,62 @@ See [github.com/goplus/llgo/py](https://pkg.go.dev/github.com/goplus/llgo/py) fo
 
 LLGo can easily import any libraries from the C ecosystem. Currently, this import process is still manual, but in the future, it will be automated similar to Python library imports.
 
-The currently imported libraries include:
+The currently supported libraries include:
 
-* [llama2.c](https://pkg.go.dev/github.com/goplus/llgo/x/llama2)
-* [cjson](https://pkg.go.dev/github.com/goplus/llgo/x/cjson)
-* [sqlite](https://pkg.go.dev/github.com/goplus/llgo/x/sqlite)
+* [llama2.c](https://pkg.go.dev/github.com/goplus/llgo/c/llama2)
+* [cjson](https://pkg.go.dev/github.com/goplus/llgo/c/cjson)
+* [sqlite](https://pkg.go.dev/github.com/goplus/llgo/c/sqlite)
 
 Here are some examples related to them:
 
 * [llama2-c](_demo/llama2-c): inference Llama 2 (It's the first llgo AI example)
-* [mkjson](x/cjson/_demo/mkjson/mkjson.go): create a json object and print it
-* [sqlite](x/sqlite/_demo/sqlitedemo/demo.go): a basic sqlite demo
+* [mkjson](c/cjson/_demo/mkjson/mkjson.go): create a json object and print it
+* [sqlitedemo](c/sqlite/_demo/sqlitedemo/demo.go): a basic sqlite demo
 
 
 ## Go syntax support
 
-The priority of `llgo` feature iteration is:
-
-* Popular C/Python libraries
-* Full Go syntax
-* Go standard libraries
-* Popular Go packages
-
 Common Go syntax is already supported. Except for the following, which needs to be improved:
 
-* interface (Limited support)
 * map (Very limited support)
-* panic (Limited support)
-* recover (Not supported yet)
-* defer (Not supported yet)
-* gc (Not supported yet)
 * chan (Not supported yet)
-* goroutine (Not supported yet)
 * generics (Not supported yet)
 
 Here are some examples related to Go syntax:
 
 * [concat](_demo/concat/concat.go): define a variadic function
 * [genints](_demo/genints/genints.go): various forms of closure usage (including C function, recv.method and anonymous function)
+* [errors](_demo/errors/errors.go): demo to implement error interface
+* [defer](_demo/defer/defer.go): defer demo
+* [goroutine](_demo/goroutine/goroutine.go): goroutine demo
+
+
+## Defer
+
+LLGo `defer` does not support usage in loops. This is not a bug but a feature, because we think that using `defer` in a loop is a very unrecommended practice.
+
+
+### Garbage Collection (GC)
+
+By default, LLGo implements `gc` based on [bdwgc](https://www.hboehm.info/gc/) (also known as [libgc](https://www.hboehm.info/gc/)).
+
+However, you can disable gc by specifying the `nogc` tag. For example:
+
+```sh
+llgo run -tags nogc .
+```
+
+
+## Go packages support
+
+Here are the Go packages that can be imported correctly:
+
+* [unsafe](https://pkg.go.dev/unsafe)
+* [unicode](https://pkg.go.dev/unicode)
+* [unicode/utf8](https://pkg.go.dev/unicode/utf8)
+* [unicode/utf16](https://pkg.go.dev/unicode/utf16)
+* [math/bits](https://pkg.go.dev/math/bits)
+* [math](https://pkg.go.dev/math)
 
 
 ## How to install
@@ -196,6 +218,7 @@ Follow these steps to generate the `llgo` command (its usage is the same as the
 
 ```sh
 brew update  # execute if needed
+brew install libgc
 brew install llvm@17
 go install -v ./...
 ```
@@ -206,6 +229,7 @@ go install -v ./...
 echo 'deb http://apt.llvm.org/focal/ llvm-toolchain-focal-17 main' | sudo tee /etc/apt/sources.list.d/llvm.list
 wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
 sudo apt-get update  # execute if needed
+sudo apt-get install libgc-dev
 sudo apt-get install --no-install-recommends llvm-17-dev
 go install -v ./...
 ```
@@ -213,3 +237,29 @@ go install -v ./...
 ### on Windows
 
 TODO
+
+
+## Development tools
+
+* [pydump](chore/_xtool/pydump): It's the first program compiled by `llgo` (NOT `go`) in a production environment. It outputs symbol information (functions, variables, and constants) from a Python library in JSON format, preparing for the generation of corresponding packages in `llgo`.
+* [pysigfetch](https://github.com/goplus/hdq/tree/main/chore/pysigfetch): It generates symbol information by extracting information from Python's documentation site. This tool is not part of the `llgo` project, but we depend on it.
+* [llpyg](chore/llpyg): It is used to automatically convert Python libraries into Go packages that `llgo` can import. It depends on `pydump` and `pysigfetch` to accomplish the task.
+* [llgen](chore/llgen): It is used to compile Go packages into LLVM IR files (*.ll).
+* [ssadump](chore/ssadump): It is a Go SSA builder and interpreter.
+
+How do I generate these tools?
+
+```sh
+go install -v ./...  # compile all tools except pydump
+cd chore/_xtool
+llgo install ./...   # compile pydump
+go install github.com/goplus/hdq/chore/pysigfetch@v0.8.1  # compile pysigfetch
+```
+
+## Key modules
+
+Below are the key modules for understanding the implementation principles of `llgo`:
+
+* [llgo/ssa](https://pkg.go.dev/github.com/goplus/llgo/ssa): It generates LLVM IR files (LLVM SSA) using the semantics (interfaces) of Go SSA. Although `LLVM SSA` and `Go SSA` are both IR languages, they work at completely different levels. `LLVM SSA` is closer to machine code, which abstracts different instruction sets. While `Go SSA` is closer to a high-level language. We can think of it as the instruction set of the `Go computer`. `llgo/ssa` is not just limited to the `llgo` compiler. If we view it as the high-level expressive power of `LLVM`, you'll find it very useful. Prior to `llgo/ssa`, you had to operate `LLVM` using machine code semantics. But now, with the advanced SSA form (in the semantics of Go SSA), you can conveniently utilize `LLVM`.
+* [llgo/cl](https://pkg.go.dev/github.com/goplus/llgo/cl): It is the core of the llgo compiler. It converts a Go package into LLVM IR files. It depends on `llgo/ssa`.
+* [llgo/internal/build](https://pkg.go.dev/github.com/goplus/llgo/internal/build): It strings together the entire compilation process of `llgo`. It depends on `llgo/ssa` and `llgo/cl`.

_demo/defer/defer.go

@@ -0,0 +1,17 @@
+package main
+
+func f(s string) bool {
+	return len(s) > 2
+}
+
+func main() {
+	defer func() {
+		println("hi")
+	}()
+	if s := "hello"; f(s) {
+		defer println(s)
+	} else {
+		defer println("world")
+	}
+	defer println("bye")
+}

_demo/errors/errors.go

@@ -0,0 +1,22 @@
+package main
+
+// New returns an error that formats as the given text.
+// Each call to New returns a distinct error value even if the text is identical.
+func New(text string) error {
+	return &errorString{text}
+}
+
+// errorString is a trivial implementation of error.
+type errorString struct {
+	s string
+}
+
+func (e *errorString) Error() string {
+	return e.s
+}
+
+func main() {
+	err := New("an error")
+	println(err)
+	println(err.Error())
+}

_demo/goroutine/goroutine.go

@@ -0,0 +1,12 @@
+package main
+
+func main() {
+	done := false
+	go func() {
+		println("Hello, goroutine")
+		done = true
+	}()
+	for !done {
+		print(".")
+	}
+}

_demo/interf/foo/foo.go

@@ -0,0 +1,9 @@
+package foo
+
+func Bar() any {
+	return struct{ V int }{1}
+}
+
+func F() any {
+	return struct{ v int }{1}
+}

_demo/interf/interf.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"github.com/goplus/llgo/_demo/interf/foo"
+)
+
+func Foo() any {
+	return struct{ v int }{1}
+}
+
+func main() {
+	v := Foo()
+	if x, ok := v.(struct{ v int }); ok {
+		println(x.v)
+	} else {
+		println("Foo: not ok")
+	}
+	bar := foo.Bar()
+	if x, ok := bar.(struct{ V int }); ok {
+		println(x.V)
+	} else {
+		println("Bar: not ok")
+	}
+	if x, ok := foo.F().(struct{ v int }); ok {
+		println(x.v)
+	} else {
+		println("F: not ok")
+	}
+}
+
+/* Expected output:
+1
+1
+F: not ok
+*/

_demo/llama2-c/run.go

@@ -2,7 +2,7 @@ package main
 
 import (
 	"github.com/goplus/llgo/c"
-	"github.com/goplus/llgo/x/llama2"
+	"github.com/goplus/llgo/c/llama2"
 )
 
 func main() {

_demo/math/math.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"math"
+)
+
+func main() {
+	println(math.Sqrt(2))
+	println(math.Abs(-1.2))
+	println(math.Ldexp(1.2, 3))
+}

_demo/setjmp/setjmp.go

@@ -0,0 +1,16 @@
+package main
+
+import (
+	"github.com/goplus/llgo/c/setjmp"
+)
+
+func main() {
+	var jb setjmp.SigjmpBuf
+	switch ret := setjmp.Sigsetjmp(&jb, 0); ret {
+	case 0:
+		println("Hello, setjmp!")
+		setjmp.Siglongjmp(&jb, 1)
+	default:
+		println("exception:", ret)
+	}
+}

_demo/thread/thd.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/pthread"
+)
+
+var key pthread.Key
+
+func main() {
+	key.Create(nil)
+	key.Set(c.Pointer(c.Str("main value\n")))
+
+	var thd pthread.Thread
+	pthread.Create(&thd, nil, func(arg c.Pointer) c.Pointer {
+		key.Set(c.Pointer(c.Str("thread value\n")))
+		c.Printf(c.Str("Hello, thread\nTLS: %s"), key.Get())
+		return c.Pointer(c.Str("Back to main\n"))
+	}, nil)
+
+	var retval c.Pointer
+	pthread.Join(thd, &retval)
+
+	c.Printf(c.Str("%sTLS: %s"), retval, key.Get())
+}

_pydemo/max/max.go

@@ -0,0 +1,15 @@
+package main
+
+import (
+	"github.com/goplus/llgo/py"
+	"github.com/goplus/llgo/py/std"
+)
+
+func main() {
+	x := std.Max(py.Float(3.0), py.Float(9.0), py.Float(23.0), py.Float(100.0))
+	std.Print(x)
+
+	list := py.List(3.0, 9.0, 23.0, 100.0)
+	y := std.Max(std.Iter(list))
+	std.Print(y)
+}

_pydemo/print/print.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"github.com/goplus/llgo/py"
+	"github.com/goplus/llgo/py/std"
+)
+
+func main() {
+	x := py.Float(3.14)
+	std.Print(x)
+}

_pydemo/tensor/tensor.go

@@ -0,0 +1,16 @@
+package main
+
+import (
+	"github.com/goplus/llgo/py"
+	"github.com/goplus/llgo/py/std"
+	"github.com/goplus/llgo/py/torch"
+)
+
+func main() {
+	data := py.List(
+		py.List(1.0, 2.0),
+		py.List(3.0, 4.0),
+	)
+	x := torch.Tensor(data)
+	std.Print(x)
+}

_test/bdwgc.go

@@ -0,0 +1,101 @@
+package main
+
+import (
+	"unsafe"
+
+	"github.com/goplus/llgo/_test/testing"
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/bdwgc"
+)
+
+// ------ Test malloc ------
+
+func TestMalloc(t *testing.T) {
+	pn := (*int)(bdwgc.Malloc(unsafe.Sizeof(int(0))))
+	*pn = 1 << 30
+	c.Printf(c.Str("value: %d, %x, %p, %p\n"), *pn, *pn, pn, &pn)
+
+	pl := (*int64)(bdwgc.Realloc(c.Pointer(pn), unsafe.Sizeof(int64(0))))
+	*pl = 1 << 60
+	c.Printf(c.Str("value: %lld, %llx, %p, %p\n"), *pl, *pl, pl, &pl)
+
+	bdwgc.Free(c.Pointer(pl))
+}
+
+// ------ Test finalizer ------
+
+const (
+	RETURN_VALUE_FREED = 1 << 31
+)
+
+var called uint = 0
+
+func setReturnValueFreed(pobj c.Pointer, clientData c.Pointer) {
+	called |= RETURN_VALUE_FREED
+	c.Printf(c.Str("called: %x\n"), called)
+}
+
+func setLoopValueFreed(pobj c.Pointer, clientData c.Pointer) {
+	pmask := (*uint)(clientData)
+	called |= *pmask
+	c.Printf(c.Str("called: %x\n"), called)
+}
+
+func isCalled(mask uint) bool {
+	return called&mask != 0
+}
+
+func returnValue() *int {
+	pn := bdwgc.Malloc(unsafe.Sizeof(int(0)))
+	bdwgc.RegisterFinalizer(pn, setReturnValueFreed, nil, nil, nil)
+	return (*int)(pn)
+}
+
+func callFunc() {
+	pn := returnValue()
+	*pn = 1 << 30
+	c.Printf(c.Str("value: %d, %x, %p, %p\n"), *pn, *pn, pn, &pn)
+	bdwgc.Gcollect()
+	check(!isCalled(RETURN_VALUE_FREED), c.Str("finalizer should not be called"))
+}
+
+func loop() {
+	for i := 0; i < 5; i++ {
+		p := bdwgc.Malloc(unsafe.Sizeof(int(0)))
+		pn := (*int)(p)
+		*pn = i
+		c.Printf(c.Str("value: %d, %x, %p, %p\n"), *pn, *pn, pn, &pn)
+		pflag := (*uint)(c.Malloc(unsafe.Sizeof(uint(0))))
+		*pflag = 1 << i
+		bdwgc.RegisterFinalizer(p, setLoopValueFreed, c.Pointer(pflag), nil, nil)
+		bdwgc.Gcollect()
+		check(!isCalled(1<<i), c.Str("finalizer should not be called"))
+		for j := 0; j < i; j++ {
+			check(isCalled(1<<j), c.Str("finalizers of previous objects should be called"))
+		}
+	}
+}
+
+// Clear stack to avoid reference
+func clearStack() {
+	p := c.Alloca(128)
+	c.Memset(p, 0, 128)
+}
+
+func check(b bool, msg *c.Char) {
+	if !b {
+		c.Printf(c.Str("check failed: %s\n"), msg)
+		panic("check failed")
+	}
+}
+
+func TestFinalizer(t *testing.T) {
+	bdwgc.Init()
+
+	callFunc()
+	clearStack()
+	bdwgc.Gcollect()
+	check(isCalled(RETURN_VALUE_FREED), c.Str("finalizer should be called"))
+
+	loop()
+}

_test/main.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"github.com/goplus/llgo/_test/testing"
+	"github.com/goplus/llgo/c"
+)
+
+type TestCase struct {
+	Name string
+	F    func(*testing.T)
+}
+
+func main() {
+	tests := []TestCase{
+		{"TestMalloc", TestMalloc},
+		{"TestFinalizer", TestFinalizer},
+	}
+	if c.Argc == 1 {
+		for _, test := range tests {
+			c.Printf(c.Str("%s\n"), c.AllocaCStr(test.Name))
+		}
+		return
+	}
+	c.Fprintf(c.Stderr, c.Str("arg: %s\n"), c.Index(c.Argv, 1))
+	idx := int(c.Atoi(c.Index(c.Argv, 1)))
+	if idx < 0 || idx >= len(tests) {
+		c.Printf(c.Str("invalid test index %d"), idx)
+		panic("invalid test index")
+	}
+	tests[idx].F(nil)
+}

_test/testing/testing.go

@@ -0,0 +1,4 @@
+package testing
+
+type T struct {
+}

c/bdwgc/bdwgc.go

@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package bdwgc
+
+import (
+	_ "unsafe"
+
+	"github.com/goplus/llgo/c"
+)
+
+const (
+	LLGoPackage = "link: $(pkg-config --libs bdw-gc); -lgc"
+)
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Init C.GC_init
+func Init()
+
+//go:linkname Malloc C.GC_malloc
+func Malloc(size uintptr) c.Pointer
+
+//go:linkname Realloc C.GC_realloc
+func Realloc(ptr c.Pointer, size uintptr) c.Pointer
+
+//go:linkname Free C.GC_free
+func Free(ptr c.Pointer)
+
+// -----------------------------------------------------------------------------
+
+//go:linkname RegisterFinalizer C.GC_register_finalizer
+func RegisterFinalizer(
+	obj c.Pointer,
+	fn func(c.Pointer, c.Pointer), cd c.Pointer,
+	oldFn *func(c.Pointer, c.Pointer), oldCd *c.Pointer)
+
+//go:linkname RegisterFinalizerNoOrder C.GC_register_finalizer_no_order
+func RegisterFinalizerNoOrder(
+	obj c.Pointer,
+	fn func(c.Pointer, c.Pointer), cd c.Pointer,
+	oldFn *func(c.Pointer, c.Pointer), oldCd *c.Pointer)
+
+//go:linkname RegisterFinalizerIgnoreSelf C.GC_register_finalizer_ignore_self
+func RegisterFinalizerIgnoreSelf(
+	obj c.Pointer,
+	fn func(c.Pointer, c.Pointer), cd c.Pointer,
+	oldFn *func(c.Pointer, c.Pointer), oldCd *c.Pointer)
+
+//go:linkname RegisterFinalizerUnreachable C.GC_register_finalizer_unreachable
+func RegisterFinalizerUnreachable(
+	obj c.Pointer,
+	fn func(c.Pointer, c.Pointer), cd c.Pointer,
+	oldFn *func(c.Pointer, c.Pointer), oldCd *c.Pointer)
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Enable C.GC_enable
+func Enable()
+
+//go:linkname Disable C.GC_disable
+func Disable()
+
+//go:linkname IsDisabled C.GC_is_disabled
+func IsDisabled() c.Int
+
+//go:linkname Gcollect C.GC_gcollect
+func Gcollect()
+
+//go:linkname GetMemoryUse C.GC_get_memory_use
+func GetMemoryUse() uintptr
+
+// -----------------------------------------------------------------------------
+
+//go:linkname EnableIncremental C.GC_enable_incremental
+func EnableIncremental()
+
+//go:linkname IsIncrementalMode C.GC_is_incremental_mode
+func IsIncrementalMode() c.Int
+
+//go:linkname IncrementalProtectionNeeds C.GC_incremental_protection_needs
+func IncrementalProtectionNeeds() c.Int
+
+//go:linkname StartIncrementalCollection C.GC_start_incremental_collection
+func StartIncrementalCollection()
+
+//go:linkname CollectALittle C.GC_collect_a_little
+func CollectALittle()
+
+// -----------------------------------------------------------------------------

c/c.go

@@ -33,6 +33,7 @@ type (
 	LongLong  = int64
 	UlongLong = uint64
 	Float     = float32
+	Double    = float64
 	Pointer   = unsafe.Pointer
 	FilePtr   = unsafe.Pointer
 )
@@ -45,7 +46,7 @@ type integer interface {
 func Str(string) *Char
 
 // llgo:link Advance llgo.advance
-func Advance[PtrT any](ptr PtrT, offset int) PtrT { return ptr }
+func Advance[PtrT any, I integer](ptr PtrT, offset I) PtrT { return ptr }
 
 // llgo:link Index llgo.index
 func Index[T any, I integer](ptr *T, offset I) T { return *ptr }
@@ -56,15 +57,18 @@ func Alloca(size uintptr) Pointer
 //go:linkname AllocaCStr llgo.allocaCStr
 func AllocaCStr(s string) *Char
 
-//go:linkname Unreachable llgo.unreachable
-func Unreachable()
-
 //go:linkname Malloc C.malloc
 func Malloc(size uintptr) Pointer
 
+//go:linkname Free C.free
+func Free(ptr Pointer)
+
 //go:linkname Memcpy C.memcpy
 func Memcpy(dst, src Pointer, n uintptr) Pointer
 
+//go:linkname Memmove C.memmove
+func Memmove(dst, src Pointer, n uintptr) Pointer
+
 //go:linkname Memset C.memset
 func Memset(s Pointer, c Int, n uintptr) Pointer
 
@@ -73,10 +77,22 @@ func Memset(s Pointer, c Int, n uintptr) Pointer
 //go:linkname GoStringData llgo.stringData
 func GoStringData(string) *Char
 
+//go:linkname GoDeferData llgo.deferData
+func GoDeferData() Pointer
+
 // -----------------------------------------------------------------------------
 
-//go:linkname Remove C.remove
-func Remove(path *Char) Int
+//go:linkname AllocaSigjmpBuf llgo.sigjmpbuf
+func AllocaSigjmpBuf() Pointer
+
+//go:linkname Sigsetjmp llgo.sigsetjmp
+func Sigsetjmp(jb Pointer, savemask Int) Int
+
+//go:linkname Siglongjmp llgo.siglongjmp
+func Siglongjmp(jb Pointer, retval Int)
+
+//go:linkname Unreachable llgo.unreachable
+func Unreachable()
 
 // -----------------------------------------------------------------------------
 
@@ -93,14 +109,10 @@ func Qsort(base Pointer, count, elem uintptr, compar func(a, b Pointer) Int)
 
 // -----------------------------------------------------------------------------
 
-//go:linkname Stdin __stdinp
-var Stdin FilePtr
+//go:linkname Atoi C.atoi
+func Atoi(s *Char) Int
 
-//go:linkname Stdout __stdoutp
-var Stdout FilePtr
-
-//go:linkname Stderr __stderrp
-var Stderr FilePtr
+// -----------------------------------------------------------------------------
 
 //go:linkname Printf C.printf
 func Printf(format *Char, __llgo_va_list ...any) Int
@@ -108,11 +120,31 @@ func Printf(format *Char, __llgo_va_list ...any) Int
 //go:linkname Fprintf C.fprintf
 func Fprintf(fp FilePtr, format *Char, __llgo_va_list ...any) Int
 
+//go:linkname Fwrite C.fwrite
+func Fwrite(data Pointer, size, count uintptr, fp FilePtr) uintptr
+
+//go:linkname Fputc C.fputc
+func Fputc(c Int, fp FilePtr) Int
+
+//go:linkname Fputs C.fputs
+func Fputs(s *Char, fp FilePtr) Int
+
+//go:linkname Fflush C.fflush
+func Fflush(fp FilePtr) Int
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Remove C.remove
+func Remove(path *Char) Int
+
 // -----------------------------------------------------------------------------
 
 //go:linkname Time C.time
 func Time(*int32) int32
 
+//go:linkname Usleep C.usleep
+func Usleep(useconds Uint) Int
+
 // -----------------------------------------------------------------------------
 
 type Option struct {

c/c_default.go

@@ -0,0 +1,31 @@
+//go:build !linux
+// +build !linux
+
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package c
+
+import _ "unsafe"
+
+//go:linkname Stdin __stdinp
+var Stdin FilePtr
+
+//go:linkname Stdout __stdoutp
+var Stdout FilePtr
+
+//go:linkname Stderr __stderrp
+var Stderr FilePtr

c/c_linux.go

@@ -0,0 +1,31 @@
+//go:build linux
+// +build linux
+
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package c
+
+import _ "unsafe"
+
+//go:linkname Stdin stdin
+var Stdin FilePtr
+
+//go:linkname Stdout stdout
+var Stdout FilePtr
+
+//go:linkname Stderr stderr
+var Stderr FilePtr

c/cjson/README.md

@@ -7,7 +7,11 @@ LLGo wrapper of DaveGamble/cJSON
 [![Language](https://img.shields.io/badge/language-Go+-blue.svg)](https://github.com/goplus/gop)
 
 ## How to install
-
+### on macOS (Homebrew)
+```sh
+brew install cjson 
+```
+### from source code
 ```sh
 git clone https://github.com/goplus/cjson.git
 cd cjson

c/cjson/_demo/mkjson/mkjson.go

@@ -2,7 +2,7 @@ package main
 
 import (
 	"github.com/goplus/llgo/c"
-	"github.com/goplus/llgo/x/cjson"
+	"github.com/goplus/llgo/c/cjson"
 )
 
 func main() {

c/cjson/cjson.go

@@ -23,7 +23,7 @@ import (
 )
 
 const (
-	LLGoPackage = "link: cjson"
+	LLGoPackage = "link: $(pkg-config --libs libcjson); -lcjson"
 )
 
 // llgo:type C
@@ -96,6 +96,11 @@ func (o *JSON) SetItem(key *c.Char, item *JSON) c.Int { return 0 }
 // llgo:link (*JSON).CStr C.cJSON_PrintUnformatted
 func (o *JSON) CStr() *c.Char { return nil }
 
+// Same as CStr. Provided for Go+.
+//
+// llgo:link (*JSON).Cstr C.cJSON_PrintUnformatted
+func (o *JSON) Cstr() *c.Char { return nil }
+
 // Render a JSON entity to text for transfer/storage.
 //
 // llgo:link (*JSON).Print C.cJSON_Print

c/llama2/llama2.go

@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package llama2
+
+import (
+	_ "unsafe"
+
+	"github.com/goplus/llgo/c"
+)
+
+const (
+	LLGoPackage = "link"
+)
+
+// -----------------------------------------------------------------------------
+
+// llgo:type C
+type TokenIndex struct {
+	Str *c.Char
+	Id  c.Int
+}
+
+// llgo:type C
+type Tokenizer struct {
+	Vocab          **c.Char
+	VocabScores    *c.Float
+	SortedVocab    *TokenIndex
+	VocabSize      c.Int
+	MaxTokenLength c.Uint
+	BytePieces     [512]uint8 // stores all single-byte strings
+}
+
+//go:linkname BuildTokenizer C.build_tokenizer
+func BuildTokenizer(t *Tokenizer, tokenizerPath *c.Char, vocabSize c.Int)
+
+//go:linkname FreeTokenizer C.free_tokenizer
+func FreeTokenizer(t *Tokenizer)
+
+// -----------------------------------------------------------------------------
+
+// llgo:type C
+type Config struct {
+	Dim       c.Int // transformer dimension
+	HiddenDim c.Int // for ffn layers
+	NLayers   c.Int // number of layers
+	NHeads    c.Int // number of query heads
+	NKVHeads  c.Int // number of key/value heads (can be < query heads because of multiquery)
+	VocabSize c.Int // vocabulary size, usually 256 (byte-level)
+	SeqLen    c.Int // max sequence length
+}
+
+// llgo:type C
+type TransformerWeights struct {
+	// token embedding table
+	TokenEmbeddingTable *c.Float // (vocab_size, dim)
+	// weights for rmsnorms
+	RmsAttWeight *c.Float // (layer, dim) rmsnorm weights
+	RmsFfnWeight *c.Float // (layer, dim)
+	// weights for matmuls. note dim == n_heads * head_size
+	Wq *c.Float // (layer, dim, n_heads * head_size)
+	Wk *c.Float // (layer, dim, n_kv_heads * head_size)
+	Wv *c.Float // (layer, dim, n_kv_heads * head_size)
+	Wo *c.Float // (layer, n_heads * head_size, dim)
+	// weights for ffn
+	W1 *c.Float // (layer, hidden_dim, dim)
+	W2 *c.Float // (layer, dim, hidden_dim)
+	W3 *c.Float // (layer, hidden_dim, dim)
+	// final rmsnorm
+	RmsFinalWeight *c.Float // (dim,)
+	// (optional) classifier weights for the logits, on the last layer
+	Wcls *c.Float
+}
+
+// llgo:type C
+type RunState struct {
+	// current wave of activations
+	X      *c.Float // activation at current time stamp (dim,)
+	Xb     *c.Float // same, but inside a residual branch (dim,)
+	Xb2    *c.Float // an additional buffer just for convenience (dim,)
+	Hb     *c.Float // buffer for hidden dimension in the ffn (hidden_dim,)
+	Hb2    *c.Float // buffer for hidden dimension in the ffn (hidden_dim,)
+	Q      *c.Float // query (dim,)
+	K      *c.Float // key (dim,)
+	V      *c.Float // value (dim,)
+	Att    *c.Float // buffer for scores/attention values (n_heads, seq_len)
+	Logits *c.Float // output logits
+	// kv cache
+	KeyCache   *c.Float // (layer, seq_len, dim)
+	ValueCache *c.Float // (layer, seq_len, dim)
+}
+
+// llgo:type C
+type Transformer struct {
+	Config  Config             // the hyperparameters of the architecture (the blueprint)
+	Weights TransformerWeights // the weights of the model
+	State   RunState           // buffers for the "wave" of activations in the forward pass
+
+	// some more state needed to properly clean up the memory mapping (sigh)
+	Fd       c.Int    // file descriptor for memory mapping
+	Data     *c.Float // memory mapped data pointer
+	FileSize uintptr  // size of the checkpoint file in bytes
+}
+
+//go:linkname BuildTransformer C.build_transformer
+func BuildTransformer(t *Transformer, checkpointPath *c.Char)
+
+//go:linkname FreeTransformer C.free_transformer
+func FreeTransformer(t *Transformer)
+
+// -----------------------------------------------------------------------------
+
+// llgo:type C
+type ProbIndex struct {
+	Prob  c.Float
+	Index c.Int
+} // struct used when sorting probabilities during top-p sampling
+
+// llgo:type C
+type Sampler struct {
+	VocabSize   c.Int
+	Probindex   *ProbIndex // buffer used in top-p sampling
+	Temperature c.Float
+	Topp        c.Float
+	RngState    uint64
+}
+
+//go:linkname BuildSampler C.build_sampler
+func BuildSampler(sampler *Sampler, vocabSize c.Int, temperature c.Float, topp c.Float, rngSeed uint64)
+
+//go:linkname FreeSampler C.free_sampler
+func FreeSampler(sampler *Sampler)
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Generate C.generate
+func Generate(
+	transformer *Transformer, tokenizer *Tokenizer, sampler *Sampler,
+	prompt *c.Char, steps c.Int)
+
+//go:linkname Chat C.chat
+func Chat(
+	transformer *Transformer, tokenizer *Tokenizer, sampler *Sampler,
+	cliUserPrompt *c.Char, cliSystemPrompt *c.Char, steps c.Int)
+
+// -----------------------------------------------------------------------------

c/llama2/llgo.cfg

@@ -1,6 +1,6 @@
 {
     "cl": [
         "clang -emit-llvm -S -o llgo_autogen.ll -c llama2/run.c",
-        "zip llgo_autogen.lla llgo_autogen.ll"
+        "rm llgo_autogen.lla; zip llgo_autogen.lla llgo_autogen.ll"
     ]
 }

c/math/math.go

@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package math
+
+import (
+	_ "unsafe"
+
+	"github.com/goplus/llgo/c"
+)
+
+const (
+	LLGoPackage = "decl"
+)
+
+//go:linkname Acos C.acos
+func Acos(x float64) float64
+
+//go:linkname Acosh C.acosh
+func Acosh(x float64) float64
+
+//go:linkname Asin C.asin
+func Asin(x float64) float64
+
+//go:linkname Asinh C.asinh
+func Asinh(x float64) float64
+
+//go:linkname Atan C.atan
+func Atan(x float64) float64
+
+//go:linkname Atan2 C.atan2
+func Atan2(y, x float64) float64
+
+//go:linkname Atanh C.atanh
+func Atanh(x float64) float64
+
+//go:linkname Cbrt C.cbrt
+func Cbrt(x float64) float64
+
+//go:linkname Ceil C.ceil
+func Ceil(x float64) float64
+
+//go:linkname Cos C.cos
+func Cos(x float64) float64
+
+//go:linkname Cosh C.cosh
+func Cosh(x float64) float64
+
+//go:linkname Copysign C.copysign
+func Copysign(x, y float64) float64
+
+//go:linkname Erf C.erf
+func Erf(x float64) float64
+
+//go:linkname Erfc C.erfc
+func Erfc(x float64) float64
+
+//go:linkname Exp C.exp
+func Exp(x float64) float64
+
+//go:linkname Exp2 C.exp2
+func Exp2(x float64) float64
+
+//go:linkname Expm1 C.expm1
+func Expm1(x float64) float64
+
+//go:linkname Fdim C.fdim
+func Fdim(x, y float64) float64
+
+//go:linkname Floor C.floor
+func Floor(x float64) float64
+
+//go:linkname Fma C.fma
+func Fma(x, y, z float64) float64
+
+//go:linkname Fmax C.fmax
+func Fmax(x, y float64) float64
+
+//go:linkname Fmin C.fmin
+func Fmin(x, y float64) float64
+
+//go:linkname Fmod C.fmod
+func Fmod(x, y float64) float64
+
+//go:linkname Frexp C.frexp
+func Frexp(x float64, exp *c.Int) float64
+
+//go:linkname Gamma C.gamma
+func Gamma(x float64) float64
+
+//go:linkname Hypot C.hypot
+func Hypot(x, y float64) float64
+
+//go:linkname Ilogb C.ilogb
+func Ilogb(x float64) c.Int
+
+//go:linkname J0 C.j0
+func J0(x float64) float64
+
+//go:linkname J1 C.j1
+func J1(x float64) float64
+
+//go:linkname Jn C.jn
+func Jn(n c.Int, x float64) float64
+
+//go:linkname Ldexp C.ldexp
+func Ldexp(x float64, exp c.Int) float64
+
+//go:linkname Lgamma C.lgamma
+func Lgamma(x float64) float64
+
+//go:linkname Log C.log
+func Log(x float64) float64
+
+//go:linkname Log10 C.log10
+func Log10(x float64) float64
+
+//go:linkname Log1p C.log1p
+func Log1p(x float64) float64
+
+//go:linkname Log2 C.log2
+func Log2(x float64) float64
+
+//go:linkname Logb C.logb
+func Logb(x float64) float64
+
+//go:linkname Modf C.modf
+func Modf(x float64, ipart *float64) float64
+
+//go:linkname Nan C.nan
+func Nan(tag *c.Char) float64
+
+//go:linkname Nextafter C.nextafter
+func Nextafter(x, y float64) float64
+
+//go:linkname Pow C.pow
+func Pow(x, y float64) float64
+
+//go:linkname Remainder C.remainder
+func Remainder(x, y float64) float64
+
+//go:linkname Round C.round
+func Round(x float64) float64
+
+//go:linkname Sin C.sin
+func Sin(x float64) float64
+
+//go:linkname Sinh C.sinh
+func Sinh(x float64) float64
+
+//go:linkname Sqrt C.sqrt
+func Sqrt(x float64) float64
+
+//go:linkname Tan C.tan
+func Tan(x float64) float64
+
+//go:linkname Tanh C.tanh
+func Tanh(x float64) float64
+
+//go:linkname Tgamma C.tgamma
+func Tgamma(x float64) float64
+
+//go:linkname Trunc C.trunc
+func Trunc(x float64) float64
+
+// -----------------------------------------------------------------------------

c/pthread/pthread.go

@@ -0,0 +1,160 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package pthread
+
+import (
+	_ "unsafe"
+
+	"github.com/goplus/llgo/c"
+)
+
+const (
+	LLGoPackage = "decl"
+)
+
+func __noop__() c.Int {
+	return 0
+}
+
+// -----------------------------------------------------------------------------
+
+type aThread struct {
+	Unused [8]byte
+}
+
+// Thread represents a POSIX thread.
+type Thread = *aThread
+
+// The pthread_create() function starts a new thread in the calling
+// process.  The new thread starts execution by invoking
+// start_routine(); arg is passed as the sole argument of
+// start_routine().
+//
+// The new thread terminates in one of the following ways:
+//
+//   - It calls pthread_exit(3), specifying an exit status value that
+//     is available to another thread in the same process that calls
+//     pthread_join(3).
+//
+//   - It returns from start_routine().  This is equivalent to
+//     calling pthread_exit(3) with the value supplied in the return
+//     statement.
+//
+//   - It is canceled (see pthread_cancel(3)).
+//
+//   - Any of the threads in the process calls exit(3), or the main
+//     thread performs a return from main().  This causes the
+//     termination of all threads in the process.
+//
+// On success, pthread_create() returns 0; on error, it returns an
+// error number, and the contents of *thread are undefined.
+//
+// See https://man7.org/linux/man-pages/man3/pthread_create.3.html
+//
+//go:linkname Create C.pthread_create
+func Create(pthread *Thread, attr *Attr, routine func(c.Pointer) c.Pointer, arg c.Pointer) c.Int
+
+// The pthread_join() function waits for the thread specified by
+// thread to terminate.  If that thread has already terminated, then
+// pthread_join() returns immediately.  The thread specified by
+// thread must be joinable.
+//
+// If retval is not NULL, then pthread_join() copies the exit status
+// of the target thread (i.e., the value that the target thread
+// supplied to pthread_exit(3)) into the location pointed to by
+// retval.  If the target thread was canceled, then PTHREAD_CANCELED
+// is placed in the location pointed to by retval.
+//
+// If multiple threads simultaneously try to join with the same
+// thread, the results are undefined.  If the thread calling
+// pthread_join() is canceled, then the target thread will remain
+// joinable (i.e., it will not be detached).
+//
+// See https://man7.org/linux/man-pages/man3/pthread_join.3.html
+//
+//go:linkname Join C.pthread_join
+func Join(thread Thread, retval *c.Pointer) c.Int
+
+// The pthread_exit() function terminates the calling thread and
+// returns a value via retval that (if the thread is joinable) is
+// available to another thread in the same process that calls
+// pthread_join(3).
+//
+// See https://man7.org/linux/man-pages/man3/pthread_exit.3.html
+//
+//go:linkname Exit C.pthread_exit
+func Exit(retval c.Pointer)
+
+// The pthread_cancel() function sends a cancelation request to the
+// thread thread.
+//
+// See https://man7.org/linux/man-pages/man3/pthread_cancel.3.html
+//
+//go:linkname Cancel C.pthread_cancel
+func Cancel(thread Thread) c.Int
+
+// -----------------------------------------------------------------------------
+
+// Attr represents a POSIX thread attributes.
+type Attr struct {
+	Detached byte
+	SsSp     *c.Char
+	SsSize   uintptr
+}
+
+// llgo:link (*Attr).Init C.pthread_attr_init
+func (attr *Attr) Init() c.Int { return 0 }
+
+// llgo:link (*Attr).Destroy C.pthread_attr_destroy
+func (attr *Attr) Destroy() c.Int { return 0 }
+
+// llgo:link (*Attr).GetDetached C.pthread_attr_getdetachstate
+func (attr *Attr) GetDetached(detached *c.Int) c.Int { return 0 }
+
+// llgo:link (*Attr).SetDetached C.pthread_attr_setdetachstate
+func (attr *Attr) SetDetached(detached c.Int) c.Int { return 0 }
+
+// llgo:link (*Attr).GetStackSize C.pthread_attr_getstacksize
+func (attr *Attr) GetStackSize(stackSize *uintptr) c.Int { return 0 }
+
+// llgo:link (*Attr).SetStackSize C.pthread_attr_setstacksize
+func (attr *Attr) SetStackSize(stackSize uintptr) c.Int { return 0 }
+
+// llgo:link (*Attr).GetStackAddr C.pthread_attr_getstackaddr
+func (attr *Attr) GetStackAddr(stackAddr *c.Pointer) c.Int { return 0 }
+
+// llgo:link (*Attr).SetStackAddr C.pthread_attr_setstackaddr
+func (attr *Attr) SetStackAddr(stackAddr c.Pointer) c.Int { return 0 }
+
+// -----------------------------------------------------------------------------
+// Thread Local Storage
+
+type Key c.Uint
+
+// llgo:link (*Key).Create C.pthread_key_create
+func (key *Key) Create(destructor func(c.Pointer)) c.Int { return 0 }
+
+// llgo:link Key.Delete C.pthread_key_delete
+func (key Key) Delete() c.Int { return 0 }
+
+// llgo:link Key.Get C.pthread_getspecific
+func (key Key) Get() c.Pointer { return nil }
+
+// llgo:link Key.Set C.pthread_setspecific
+func (key Key) Set(value c.Pointer) c.Int { return __noop__() }
+
+// -----------------------------------------------------------------------------

c/setjmp/setjmp.go

@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package setjmp
+
+// #include <setjmp.h>
+import "C"
+
+import (
+	_ "unsafe"
+
+	"github.com/goplus/llgo/c"
+)
+
+const (
+	LLGoPackage = "decl"
+)
+
+type (
+	JmpBuf    = C.jmp_buf
+	SigjmpBuf = C.sigjmp_buf
+)
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Setjmp C.setjmp
+func Setjmp(env *JmpBuf) c.Int
+
+//go:linkname Longjmp C.longjmp
+func Longjmp(env *JmpBuf, val c.Int)
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Sigsetjmp C.sigsetjmp
+func Sigsetjmp(env *SigjmpBuf, savemask c.Int) c.Int
+
+//go:linkname Siglongjmp C.siglongjmp
+func Siglongjmp(env *SigjmpBuf, val c.Int)
+
+// -----------------------------------------------------------------------------

c/setjmp/trycatch/_code/demo.cpp

@@ -0,0 +1,5 @@
+#include <stdexcept>
+
+extern "C" void throwCppException() {
+    throw std::runtime_error("C++ exception");
+}

c/setjmp/trycatch/_code/try_catch.cpp

@@ -0,0 +1,13 @@
+#include <exception>
+#include <stdio.h>
+
+extern "C" void throwCppException();
+
+int main() {
+    try {
+        throwCppException();
+    } catch (std::exception& e) {
+        printf("Hi, %s\n", e.what());
+    }
+    return 0;
+}

c/setjmp/trycatch/demo.go

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package trycatch
+
+import (
+	_ "unsafe"
+)
+
+const (
+	LLGoPackage = "link: c++"
+)
+
+//go:linkname ThrowCppException C.throwCppException
+func ThrowCppException()

c/setjmp/trycatch/llgo.cfg

@@ -0,0 +1,8 @@
+{
+    "cl": [
+        "clang -emit-llvm -S -o demo.ll -c _code/demo.cpp",
+        "clang -emit-llvm -S -o _code/llgo_autogen.ll -c _code/try_catch.cpp",
+        "llgen .",
+        "rm llgo_autogen.lla; zip llgo_autogen.lla llgo_autogen.ll demo.ll",
+    ]
+}

c/sqlite/_demo/sqlitedemo/demo.go

@@ -2,7 +2,7 @@ package main
 
 import (
 	"github.com/goplus/llgo/c"
-	"github.com/goplus/llgo/x/sqlite"
+	"github.com/goplus/llgo/c/sqlite"
 )
 
 func main() {

c/sqlite/sqlite.go

@@ -22,14 +22,8 @@ import (
 	"github.com/goplus/llgo/c"
 )
 
-type (
-	Char    = c.Char
-	Int     = c.Int
-	Pointer = c.Pointer
-)
-
 const (
-	LLGoPackage = "link: sqlite3"
+	LLGoPackage = "link: $(pkg-config --libs sqlite3); -lsqlite3"
 )
 
 // llgo:type C
@@ -44,7 +38,7 @@ type Stmt struct {
 
 // -----------------------------------------------------------------------------
 
-type Errno Int
+type Errno c.Int
 
 const (
 	OK Errno = 0 // Successful result
@@ -82,11 +76,11 @@ const (
 	Done   Errno = 101 // sqlite3_step() has finished executing
 )
 
-// llgo:link (Errno).Errstr C.sqlite3_errstr
-func (err Errno) Errstr() *Char { return nil }
+// llgo:link Errno.Errstr C.sqlite3_errstr
+func (err Errno) Errstr() *c.Char { return nil }
 
 // llgo:link (*Sqlite3).Errmsg C.sqlite3_errmsg
-func (db *Sqlite3) Errmsg() *Char { return nil }
+func (db *Sqlite3) Errmsg() *c.Char { return nil }
 
 // llgo:link (*Sqlite3).Errcode C.sqlite3_errcode
 func (db *Sqlite3) Errcode() Errno { return 0 }
@@ -97,13 +91,13 @@ func (db *Sqlite3) ExtendedErrcode() Errno { return 0 }
 // -----------------------------------------------------------------------------
 
 //go:linkname doOpen C.sqlite3_open
-func doOpen(filename *Char, ppDb **Sqlite3) Errno
+func doOpen(filename *c.Char, ppDb **Sqlite3) Errno
 
 //go:linkname doOpenV2 C.sqlite3_open_v2
-func doOpenV2(filename *Char, ppDb **Sqlite3, flags OpenFlags, zVfs *Char) Errno
+func doOpenV2(filename *c.Char, ppDb **Sqlite3, flags OpenFlags, zVfs *c.Char) Errno
 
 // OpenFlags represents SQLite open flags.
-type OpenFlags Int
+type OpenFlags c.Int
 
 const (
 	OpenReadOnly      OpenFlags = 0x00000001
@@ -132,7 +126,7 @@ const (
 
 // Opening A New Database Connection
 // filename: Database filename (UTF-8)
-func Open(filename *Char) (db *Sqlite3, err Errno) {
+func Open(filename *c.Char) (db *Sqlite3, err Errno) {
 	err = doOpen(filename, &db)
 	return
 }
@@ -140,7 +134,7 @@ func Open(filename *Char) (db *Sqlite3, err Errno) {
 // Opening A New Database Connection
 // filename: Database filename (UTF-8)
 // zVfs: Name of VFS module to use
-func OpenV2(filename *Char, flags OpenFlags, zVfs *Char) (db *Sqlite3, err Errno) {
+func OpenV2(filename *c.Char, flags OpenFlags, zVfs *c.Char) (db *Sqlite3, err Errno) {
 	err = doOpenV2(filename, &db, flags, zVfs)
 	return
 }
@@ -158,22 +152,22 @@ func (db *Sqlite3) CloseV2() Errno { return 0 }
 // -----------------------------------------------------------------------------
 
 // llgo:link (*Sqlite3).doPrepare C.sqlite3_prepare
-func (*Sqlite3) doPrepare(*Char, Int, **Stmt, **Char) Errno {
+func (*Sqlite3) doPrepare(*c.Char, c.Int, **Stmt, **c.Char) Errno {
 	return 0
 }
 
 // llgo:link (*Sqlite3).doPrepareV2 C.sqlite3_prepare_v2
-func (*Sqlite3) doPrepareV2(*Char, Int, **Stmt, **Char) Errno {
+func (*Sqlite3) doPrepareV2(*c.Char, c.Int, **Stmt, **c.Char) Errno {
 	return 0
 }
 
 // llgo:link (*Sqlite3).doPrepareV3 C.sqlite3_prepare_v3
-func (*Sqlite3) doPrepareV3(*Char, Int, PrepareFlags, **Stmt, **Char) Errno {
+func (*Sqlite3) doPrepareV3(*c.Char, c.Int, PrepareFlags, **Stmt, **c.Char) Errno {
 	return 0
 }
 
 // PrepareFlags represents SQLite prepare flags.
-type PrepareFlags Int
+type PrepareFlags c.Int
 
 const (
 	PreparePersistent PrepareFlags = 0x01
@@ -183,17 +177,17 @@ const (
 
 // Compiling An SQL Statement
 // tail: Pointer to unused portion of sql
-func (db *Sqlite3) Prepare(sql string, tail **Char) (stmt *Stmt, err Errno) {
+func (db *Sqlite3) Prepare(sql string, tail **c.Char) (stmt *Stmt, err Errno) {
 	err = db.doPrepare(c.GoStringData(sql), c.Int(len(sql)), &stmt, tail)
 	return
 }
 
-func (db *Sqlite3) PrepareV2(sql string, tail **Char) (stmt *Stmt, err Errno) {
+func (db *Sqlite3) PrepareV2(sql string, tail **c.Char) (stmt *Stmt, err Errno) {
 	err = db.doPrepareV2(c.GoStringData(sql), c.Int(len(sql)), &stmt, tail)
 	return
 }
 
-func (db *Sqlite3) PrepareV3(sql string, flags PrepareFlags, tail **Char) (stmt *Stmt, err Errno) {
+func (db *Sqlite3) PrepareV3(sql string, flags PrepareFlags, tail **c.Char) (stmt *Stmt, err Errno) {
 	err = db.doPrepareV3(c.GoStringData(sql), c.Int(len(sql)), flags, &stmt, tail)
 	return
 }
@@ -206,10 +200,10 @@ func (stmt *Stmt) Close() Errno { return 0 }
 // -----------------------------------------------------------------------------
 
 // llgo:link (*Stmt).BindInt C.sqlite3_bind_int
-func (*Stmt) BindInt(idx Int, val Int) Errno { return 0 }
+func (*Stmt) BindInt(idx c.Int, val c.Int) Errno { return 0 }
 
 // llgo:link (*Stmt).BindInt64 C.sqlite3_bind_int64
-func (*Stmt) BindInt64(idx Int, val int64) Errno { return 0 }
+func (*Stmt) BindInt64(idx c.Int, val int64) Errno { return 0 }
 
 /*
 const (
@@ -219,7 +213,9 @@ const (
 */
 
 // llgo:link (*Stmt).BindText C.sqlite3_bind_text
-func (*Stmt) BindText(idx Int, val *Char, nByte Int, destructor func(Pointer)) Errno { return 0 }
+func (*Stmt) BindText(idx c.Int, val *c.Char, nByte c.Int, destructor func(c.Pointer)) Errno {
+	return 0
+}
 
 // -----------------------------------------------------------------------------
 
@@ -238,19 +234,19 @@ func (*Stmt) Step() Errno { return 0 }
 // -----------------------------------------------------------------------------
 
 // llgo:link (*Stmt).ColumnCount C.sqlite3_column_count
-func (stmt *Stmt) ColumnCount() Int { return 0 }
+func (stmt *Stmt) ColumnCount() c.Int { return 0 }
 
 // llgo:link (*Stmt).ColumnName C.sqlite3_column_name
-func (stmt *Stmt) ColumnName(idx Int) *Char { return nil }
+func (stmt *Stmt) ColumnName(idx c.Int) *c.Char { return nil }
 
 // llgo:link (*Stmt).ColumnInt C.sqlite3_column_int
-func (stmt *Stmt) ColumnInt(idx Int) Int { return 0 }
+func (stmt *Stmt) ColumnInt(idx c.Int) c.Int { return 0 }
 
 // llgo:link (*Stmt).ColumnInt64 C.sqlite3_column_int64
-func (stmt *Stmt) ColumnInt64(idx Int) int64 { return 0 }
+func (stmt *Stmt) ColumnInt64(idx c.Int) int64 { return 0 }
 
 // llgo:link (*Stmt).ColumnText C.sqlite3_column_text
-func (stmt *Stmt) ColumnText(idx Int) *Char { return nil }
+func (stmt *Stmt) ColumnText(idx c.Int) *c.Char { return nil }
 
 // -----------------------------------------------------------------------------
 
@@ -258,8 +254,8 @@ func (stmt *Stmt) ColumnText(idx Int) *Char { return nil }
 //
 // llgo:link (*Sqlite3).Exec C.sqlite3_exec
 func (*Sqlite3) Exec(
-	sql *Char, callback func(arg Pointer, resultCols Int, colVals, colNames **Char) Int,
-	arg Pointer, errmsg **Char) Errno {
+	sql *c.Char, callback func(arg c.Pointer, resultCols c.Int, colVals, colNames **c.Char) c.Int,
+	arg c.Pointer, errmsg **c.Char) Errno {
 	return 0
 }
 

chore/_xtool/pydump/pydump.go

@@ -18,9 +18,9 @@ package main
 
 import (
 	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/cjson"
 	"github.com/goplus/llgo/py"
 	"github.com/goplus/llgo/py/inspect"
-	"github.com/goplus/llgo/x/cjson"
 )
 
 func main() {

chore/gentests/gentests.go

@@ -22,6 +22,7 @@ import (
 	"strings"
 
 	"github.com/goplus/llgo/internal/llgen"
+	"github.com/goplus/llgo/ssa"
 	"github.com/goplus/mod"
 )
 
@@ -29,10 +30,13 @@ func main() {
 	dir, _, err := mod.FindGoMod(".")
 	check(err)
 
+	ssa.Initialize(ssa.InitAll | ssa.InitNative)
 	llgen.Verbose = false
 
 	llgenDir(dir + "/cl/_testlibc")
+	llgenDir(dir + "/cl/_testlibgo")
 	llgenDir(dir + "/cl/_testrt")
+	llgenDir(dir + "/cl/_testgo")
 	llgenDir(dir+"/cl/_testpy", "")
 	llgenDir(dir+"/cl/_testdata", "")
 }

chore/llpyg/llpyg.go

@@ -29,6 +29,7 @@ import (
 	"strings"
 
 	"github.com/goplus/gogen"
+	"github.com/goplus/llgo/chore/llpyg/pysig"
 	"github.com/goplus/llgo/ssa"
 )
 
@@ -37,6 +38,7 @@ type symbol struct {
 	Type string `json:"type"`
 	Doc  string `json:"doc"`
 	Sig  string `json:"sig"`
+	URL  string `json:"url"`
 }
 
 type module struct {
@@ -44,6 +46,29 @@ type module struct {
 	Items []*symbol `json:"items"`
 }
 
+func pydump(pyLib string) (mod module) {
+	var out bytes.Buffer
+	cmd := exec.Command("pydump", pyLib)
+	cmd.Stdout = &out
+	cmd.Stderr = os.Stderr
+	cmd.Run()
+
+	json.Unmarshal(out.Bytes(), &mod)
+	return
+}
+
+func pysigfetch(pyLib string, names []string) (mod module) {
+	var out bytes.Buffer
+	cmd := exec.Command("pysigfetch", pyLib, "-")
+	cmd.Stdin = strings.NewReader(strings.Join(names, " "))
+	cmd.Stdout = &out
+	cmd.Stderr = os.Stderr
+	cmd.Run()
+
+	json.Unmarshal(out.Bytes(), &mod)
+	return
+}
+
 func main() {
 	if len(os.Args) < 2 {
 		fmt.Fprintln(os.Stderr, "Usage: llpyg <pythonLibPath>")
@@ -51,25 +76,17 @@ func main() {
 	}
 	pyLib := os.Args[1]
 
-	var out bytes.Buffer
-	pydump := exec.Command("pydump", pyLib)
-	pydump.Stdout = &out
-	pydump.Run()
-
-	var mod module
-	json.Unmarshal(out.Bytes(), &mod)
-
-	modName := mod.Name
-	if modName == "" {
+	mod := pydump(pyLib)
+	if mod.Name != pyLib {
 		log.Printf("import module %s failed\n", pyLib)
 		os.Exit(1)
 	}
-	pkg := gogen.NewPackage("", modName, nil)
+	pkg := gogen.NewPackage("", pkgName(pyLib), nil)
 	pkg.Import("unsafe").MarkForceUsed(pkg)       // import _ "unsafe"
 	py := pkg.Import("github.com/goplus/llgo/py") // import "github.com/goplus/llgo/py"
 
 	f := func(cb *gogen.CodeBuilder) int {
-		cb.Val("py." + modName)
+		cb.Val("py." + mod.Name)
 		return 1
 	}
 	defs := pkg.NewConstDefs(pkg.Types.Scope())
@@ -79,89 +96,114 @@ func main() {
 	objPtr := types.NewPointer(obj)
 	ret := types.NewTuple(pkg.NewParam(0, "", objPtr))
 
-	ctx := &context{pkg, obj, objPtr, ret, py}
-	for _, sym := range mod.Items {
-		switch sym.Type {
-		case "builtin_function_or_method", "function", "ufunc", "method-wrapper":
-			ctx.genFunc(pkg, sym)
-		case "str", "float", "bool", "type", "dict", "tuple", "list", "object",
-			"module", "int", "set", "frozenset", "flags", "bool_": // skip
-		default:
-			t := sym.Type
-			if len(t) > 0 && (t[0] >= 'a' && t[0] <= 'z') && !strings.HasSuffix(t, "_info") {
-				log.Panicln("unsupport type:", sym.Type)
-			}
+	ctx := &context{pkg, obj, objPtr, ret, nil, py}
+	ctx.genMod(pkg, &mod)
+	skips := ctx.skips
+	if n := len(skips); n > 0 {
+		log.Printf("==> There are %d signatures not found, fetch from doc site\n", n)
+		mod = pysigfetch(pyLib, skips)
+		ctx.skips = skips[:0]
+		ctx.genMod(pkg, &mod)
+		if len(mod.Items) > 0 {
+			skips = ctx.skips
+		}
+		if n := len(skips); n > 0 {
+			log.Printf("==> Skip %d symbols:\n%v\n", n, skips)
 		}
 	}
+
 	pkg.WriteTo(os.Stdout)
 }
 
+func pkgName(pyLib string) string {
+	if pos := strings.LastIndexByte(pyLib, '.'); pos >= 0 {
+		return pyLib[pos+1:]
+	}
+	return pyLib
+}
+
 type context struct {
 	pkg    *gogen.Package
 	obj    *types.Named
 	objPtr *types.Pointer
 	ret    *types.Tuple
+	skips  []string
 	py     gogen.PkgRef
 }
 
+func (ctx *context) genMod(pkg *gogen.Package, mod *module) {
+	for _, sym := range mod.Items {
+		switch sym.Type {
+		case "builtin_function_or_method", "function", "method", "ufunc", "method-wrapper":
+			ctx.genFunc(pkg, sym)
+		case "str", "float", "bool", "type", "dict", "tuple", "list", "object", "module",
+			"int", "set", "frozenset", "flags", "bool_", "pybind11_type", "layout",
+			"memory_format", "qscheme", "dtype", "tensortype", "ellipsis": // skip
+		case "": // pysigfetch: page not found
+			ctx.skips = append(ctx.skips, sym.Name)
+		default:
+			t := sym.Type
+			if len(t) > 0 && (t[0] >= 'a' && t[0] <= 'z') && !strings.HasSuffix(t, "_info") {
+				log.Panicln("unsupport type:", sym.Type)
+			}
+		}
+	}
+}
+
 func (ctx *context) genFunc(pkg *gogen.Package, sym *symbol) {
 	name, symSig := sym.Name, sym.Sig
 	if len(name) == 0 || name[0] == '_' {
 		return
 	}
-	params, variadic, skip := ctx.genParams(pkg, symSig)
-	if skip {
-		// TODO(xsw): don't skip any func
-		log.Println("skip func:", name, symSig)
+	if symSig == "<NULL>" {
+		ctx.skips = append(ctx.skips, name)
 		return
 	}
+	params, variadic := ctx.genParams(pkg, symSig)
 	name = genName(name, -1)
 	sig := types.NewSignatureType(nil, nil, nil, params, ctx.ret, variadic)
 	fn := pkg.NewFuncDecl(token.NoPos, name, sig)
 	list := ctx.genDoc(sym.Doc)
+	if sym.URL != "" {
+		if len(list) > 0 {
 			list = append(list, emptyCommentLine)
+		}
+		list = append(list, genSee(sym.URL))
+	}
+	if len(list) > 0 {
+		list = append(list, emptyCommentLine)
+	}
 	list = append(list, ctx.genLinkname(name, sym))
 	fn.SetComments(pkg, &ast.CommentGroup{List: list})
 	// fn.BodyStart(pkg).End()
 }
 
-func (ctx *context) genParams(pkg *gogen.Package, sig string) (*types.Tuple, bool, bool) {
-	if sig == "<NULL>" {
-		return nil, false, true
+func (ctx *context) genParams(pkg *gogen.Package, sig string) (*types.Tuple, bool) {
+	args := pysig.Parse(sig)
+	if len(args) == 0 {
+		return nil, false
 	}
-	sig = strings.TrimSuffix(strings.TrimPrefix(sig, "("), ")")
-	if sig == "" { // empty params
-		return nil, false, false
-	}
-	parts := strings.Split(sig, ",")
-	n := len(parts)
+	n := len(args)
 	objPtr := ctx.objPtr
 	list := make([]*types.Var, 0, n)
 	for i := 0; i < n; i++ {
-		part := strings.TrimSpace(parts[i])
-		if part == "/" {
+		name := args[i].Name
+		if name == "/" {
 			continue
 		}
-		if part == "*" {
+		if name == "*" || name == "\\*" {
 			break
 		}
-		if strings.HasPrefix(part, "*") {
-			if part[1] != '*' {
+		if strings.HasPrefix(name, "*") {
+			if name[1] != '*' {
 				list = append(list, ssa.VArg())
-				return types.NewTuple(list...), true, false
+				return types.NewTuple(list...), true
 			}
-			return types.NewTuple(list...), false, false
+			return types.NewTuple(list...), false
 		}
-		pos := strings.IndexByte(part, '=')
-		if pos >= 0 {
-			if strings.HasPrefix(part[pos+1:], "<") { // skip complex default value
-				return nil, false, true
+		list = append(list, pkg.NewParam(0, genName(name, 0), objPtr))
 	}
-			part = part[:pos]
-		}
-		list = append(list, pkg.NewParam(0, genName(part, 0), objPtr))
-	}
-	return types.NewTuple(list...), false, false
+	return types.NewTuple(list...), false
 }
 
 func genName(name string, idxDontTitle int) string {
@@ -176,7 +218,7 @@ func genName(name string, idxDontTitle int) string {
 	}
 	name = strings.Join(parts, "")
 	switch name {
-	case "default", "func", "":
+	case "default", "func", "var", "range", "":
 		name += "_"
 	}
 	return name
@@ -187,14 +229,21 @@ func (ctx *context) genLinkname(name string, sym *symbol) *ast.Comment {
 }
 
 func (ctx *context) genDoc(doc string) []*ast.Comment {
+	if doc == "" {
+		return make([]*ast.Comment, 0, 4)
+	}
 	lines := strings.Split(doc, "\n")
-	list := make([]*ast.Comment, len(lines), len(lines)+2)
+	list := make([]*ast.Comment, len(lines), len(lines)+4)
 	for i, line := range lines {
 		list[i] = &ast.Comment{Text: "// " + line}
 	}
 	return list
 }
 
+func genSee(url string) *ast.Comment {
+	return &ast.Comment{Text: "// See " + url}
+}
+
 var (
 	emptyCommentLine = &ast.Comment{Text: "//"}
 )

chore/llpyg/pysig/parse.go

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package pysig
+
+import (
+	"strings"
+)
+
+type Arg struct {
+	Name   string
+	Type   string
+	DefVal string
+}
+
+// Parse parses a Python function signature.
+func Parse(sig string) (args []*Arg) {
+	sig = strings.TrimPrefix(sig, "(")
+	for {
+		pos := strings.IndexAny(sig, ",:=)")
+		if pos <= 0 {
+			return
+		}
+		arg := &Arg{Name: strings.TrimSpace(sig[:pos])}
+		args = append(args, arg)
+		c := sig[pos]
+		sig = sig[pos+1:]
+		switch c {
+		case ',':
+			continue
+		case ':':
+			arg.Type, sig = parseType(sig)
+			if strings.HasPrefix(sig, "=") {
+				arg.DefVal, sig = parseDefVal(sig[1:])
+			}
+		case '=':
+			arg.DefVal, sig = parseDefVal(sig)
+		case ')':
+			return
+		}
+		sig = strings.TrimPrefix(sig, ",")
+	}
+}
+
+const (
+	allSpecials = "([<'\""
+)
+
+var pairStops = map[byte]string{
+	'(':  ")" + allSpecials,
+	'[':  "]" + allSpecials,
+	'<':  ">" + allSpecials,
+	'\'': "'" + allSpecials,
+	'"':  "\"",
+}
+
+func parseText(sig string, stops string) (left string) {
+	for {
+		pos := strings.IndexAny(sig, stops)
+		if pos < 0 {
+			return sig
+		}
+		if c := sig[pos]; c != stops[0] {
+			if pstop, ok := pairStops[c]; ok {
+				sig = strings.TrimPrefix(parseText(sig[pos+1:], pstop), pstop[:1])
+				continue
+			}
+		}
+		return sig[pos:]
+	}
+}
+
+// stops: "=,)"
+func parseType(sig string) (string, string) {
+	left := parseText(sig, "=,)"+allSpecials)
+	return resultOf(sig, left), left
+}
+
+// stops: ",)"
+func parseDefVal(sig string) (string, string) {
+	left := parseText(sig, ",)"+allSpecials)
+	return resultOf(sig, left), left
+}
+
+func resultOf(sig, left string) string {
+	return strings.TrimSpace(sig[:len(sig)-len(left)])
+}

chore/llpyg/pysig/parse_test.go

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package pysig
+
+import "testing"
+
+func TestParse(t *testing.T) {
+	type testCase struct {
+		sig  string
+		args []*Arg
+	}
+	cases := []testCase{
+		{"(start=None, *, unit: 'str | None' = None) -> 'TimedeltaIndex'", []*Arg{
+			{Name: "start", DefVal: "None"},
+			{Name: "*"},
+			{Name: "unit", Type: "'str | None'", DefVal: "None"},
+		}},
+		{"()", nil},
+		{"(a =", []*Arg{{Name: "a"}}},
+		{"(a) -> int", []*Arg{{Name: "a"}}},
+		{"(a: int)", []*Arg{{Name: "a", Type: "int"}}},
+		{"(a: int = 1, b: float)", []*Arg{{Name: "a", Type: "int", DefVal: "1"}, {Name: "b", Type: "float"}}},
+		{"(a = <1>, b = 2.0)", []*Arg{{Name: "a", DefVal: "<1>"}, {Name: "b", DefVal: "2.0"}}},
+		{"(a: 'Suffixes' = ('_x', '_y'))", []*Arg{{Name: "a", Type: "'Suffixes'", DefVal: "('_x', '_y')"}}},
+	}
+	for _, c := range cases {
+		args := Parse(c.sig)
+		if len(args) != len(c.args) {
+			t.Fatalf("%s: len(args) = %v, want %v", c.sig, len(args), len(c.args))
+		}
+		for i, arg := range args {
+			want := c.args[i]
+			if arg.Name != want.Name || arg.Type != want.Type || arg.DefVal != want.DefVal {
+				t.Fatalf("%s: args[%v] = %v, want %v", c.sig, i, arg, want)
+			}
+		}
+	}
+}

chore/llvmtargets/llvm_targets.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/goplus/llvm"
+)
+
+func main() {
+	llvm.InitializeAllTargetInfos()
+	llvm.InitializeAllTargets()
+	llvm.InitializeAllTargetMCs()
+	llvm.InitializeNativeTarget()
+	fmt.Println("targets:")
+	for it := llvm.FirstTarget(); it.C != nil; it = it.NextTarget() {
+		fmt.Printf("- %s: %s\n", it.Name(), it.Description())
+	}
+}

cl/_testdata/apkg/out.ll

@@ -1,7 +1,7 @@
 ; ModuleID = 'apkg'
 source_filename = "apkg"
 
-@"apkg.init$guard" = global ptr null
+@"apkg.init$guard" = global i1 false, align 1
 
 define double @apkg.Max(double %0, double %1) {
 _llgo_0:

cl/_testdata/fncall/out.ll

@@ -1,9 +1,9 @@
 ; ModuleID = 'main'
 source_filename = "main"
 
-@"main.init$guard" = global ptr null
-@__llgo_argc = global ptr null
-@__llgo_argv = global ptr null
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
 
 define void @main.init() {
 _llgo_0:
@@ -18,14 +18,14 @@ _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
   ret void
 }
 
-define void @main(i32 %0, ptr %1) {
+define i32 @main(i32 %0, ptr %1) {
 _llgo_0:
   store i32 %0, ptr @__llgo_argc, align 4
   store ptr %1, ptr @__llgo_argv, align 8
   call void @"github.com/goplus/llgo/internal/runtime.init"()
   call void @main.init()
   %2 = call i64 @main.max(i64 1, i64 2)
-  ret void
+  ret i32 0
 }
 
 define i64 @main.max(i64 %0, i64 %1) {

cl/_testdata/importpkg/out.ll

@@ -1,10 +1,10 @@
 ; ModuleID = 'main'
 source_filename = "main"
 
-@main.hello = global ptr null
-@"main.init$guard" = global ptr null
-@__llgo_argc = global ptr null
-@__llgo_argv = global ptr null
+@main.hello = global [7 x i8] zeroinitializer, align 1
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
 
 define void @main.init() {
 _llgo_0:
@@ -27,7 +27,7 @@ _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
   ret void
 }
 
-define void @main(i32 %0, ptr %1) {
+define i32 @main(i32 %0, ptr %1) {
 _llgo_0:
   store i32 %0, ptr @__llgo_argc, align 4
   store ptr %1, ptr @__llgo_argv, align 8
@@ -35,7 +35,7 @@ _llgo_0:
   call void @main.init()
   %2 = call i64 @"github.com/goplus/llgo/cl/internal/stdio.Max"(i64 2, i64 100)
   call void (ptr, ...) @printf(ptr @main.hello)
-  ret void
+  ret i32 0
 }
 
 declare void @"github.com/goplus/llgo/cl/internal/stdio.init"()

cl/_testdata/method/out.ll

@@ -1,21 +1,21 @@
 ; ModuleID = 'main'
 source_filename = "main"
 
-@main.format = global ptr null
-@"main.init$guard" = global ptr null
-@__llgo_argc = global ptr null
-@__llgo_argv = global ptr null
+@main.format = global [10 x i8] zeroinitializer, align 1
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
 
-define i64 @"(main.T).Add"(i64 %0, i64 %1) {
+define i64 @main.T.Add(i64 %0, i64 %1) {
 _llgo_0:
   %2 = add i64 %0, %1
   ret i64 %2
 }
 
-define i64 @"(*main.T).Add"(ptr %0, i64 %1) {
+define i64 @"main.(*T).Add"(ptr %0, i64 %1) {
 _llgo_0:
   %2 = load i64, ptr %0, align 4
-  %3 = call i64 @"(main.T).Add"(i64 %2, i64 %1)
+  %3 = call i64 @main.T.Add(i64 %2, i64 %1)
   ret i64 %3
 }
 
@@ -42,15 +42,15 @@ _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
   ret void
 }
 
-define void @main(i32 %0, ptr %1) {
+define i32 @main(i32 %0, ptr %1) {
 _llgo_0:
   store i32 %0, ptr @__llgo_argc, align 4
   store ptr %1, ptr @__llgo_argv, align 8
   call void @"github.com/goplus/llgo/internal/runtime.init"()
   call void @main.init()
-  %2 = call i64 @"(main.T).Add"(i64 1, i64 2)
+  %2 = call i64 @main.T.Add(i64 1, i64 2)
   call void (ptr, ...) @printf(ptr @main.format, i64 %2)
-  ret void
+  ret i32 0
 }
 
 declare void @"github.com/goplus/llgo/internal/runtime.init"()

cl/_testdata/print/in.go

@@ -3,7 +3,7 @@ package main
 import (
 	"unsafe"
 
-	"github.com/goplus/llgo/internal/runtime/c"
+	"github.com/goplus/llgo/c"
 )
 
 func gwrite(b []byte) {

cl/_testdata/printf/out.ll

@@ -1,10 +1,10 @@
 ; ModuleID = 'main'
 source_filename = "main"
 
-@main.hello = global ptr null
-@"main.init$guard" = global ptr null
-@__llgo_argc = global ptr null
-@__llgo_argv = global ptr null
+@main.hello = global [7 x i8] zeroinitializer, align 1
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
 
 define void @main.init() {
 _llgo_0:
@@ -26,14 +26,14 @@ _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
   ret void
 }
 
-define void @main(i32 %0, ptr %1) {
+define i32 @main(i32 %0, ptr %1) {
 _llgo_0:
   store i32 %0, ptr @__llgo_argc, align 4
   store ptr %1, ptr @__llgo_argv, align 8
   call void @"github.com/goplus/llgo/internal/runtime.init"()
   call void @main.init()
   call void (ptr, ...) @printf(ptr @main.hello)
-  ret void
+  ret i32 0
 }
 
 declare void @"github.com/goplus/llgo/internal/runtime.init"()

cl/_testdata/printval/out.ll

@@ -1,10 +1,10 @@
 ; ModuleID = 'main'
 source_filename = "main"
 
-@main.format = global ptr null
-@"main.init$guard" = global ptr null
-@__llgo_argc = global ptr null
-@__llgo_argv = global ptr null
+@main.format = global [10 x i8] zeroinitializer, align 1
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
 
 define void @main.init() {
 _llgo_0:
@@ -29,14 +29,14 @@ _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
   ret void
 }
 
-define void @main(i32 %0, ptr %1) {
+define i32 @main(i32 %0, ptr %1) {
 _llgo_0:
   store i32 %0, ptr @__llgo_argc, align 4
   store ptr %1, ptr @__llgo_argv, align 8
   call void @"github.com/goplus/llgo/internal/runtime.init"()
   call void @main.init()
   call void (ptr, ...) @printf(ptr @main.format, i64 100)
-  ret void
+  ret i32 0
 }
 
 declare void @"github.com/goplus/llgo/internal/runtime.init"()

cl/_testdata/ptrmthd/out.ll

@@ -1,12 +1,12 @@
 ; ModuleID = 'main'
 source_filename = "main"
 
-@main.format = global ptr null
-@"main.init$guard" = global ptr null
-@__llgo_argc = global ptr null
-@__llgo_argv = global ptr null
+@main.format = global [10 x i8] zeroinitializer, align 1
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
 
-define void @"(*main.T).Print"(ptr %0, i64 %1) {
+define void @"main.(*T).Print"(ptr %0, i64 %1) {
 _llgo_0:
   call void (ptr, ...) @printf(ptr %0, i64 %1)
   ret void
@@ -35,14 +35,14 @@ _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
   ret void
 }
 
-define void @main(i32 %0, ptr %1) {
+define i32 @main(i32 %0, ptr %1) {
 _llgo_0:
   store i32 %0, ptr @__llgo_argc, align 4
   store ptr %1, ptr @__llgo_argv, align 8
   call void @"github.com/goplus/llgo/internal/runtime.init"()
   call void @main.init()
-  call void @"(*main.T).Print"(ptr @main.format, i64 100)
-  ret void
+  call void @"main.(*T).Print"(ptr @main.format, i64 100)
+  ret i32 0
 }
 
 declare void @printf(ptr, ...)

cl/_testdata/uint/out.ll

@@ -1,9 +1,9 @@
 ; ModuleID = 'main'
 source_filename = "main"
 
-@"main.init$guard" = global ptr null
-@__llgo_argc = global ptr null
-@__llgo_argv = global ptr null
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
 @0 = private unnamed_addr constant [11 x i8] c"Hello, %u\0A\00", align 1
 
 define i32 @main.f(i32 %0) {
@@ -25,7 +25,7 @@ _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
   ret void
 }
 
-define void @main(i32 %0, ptr %1) {
+define i32 @main(i32 %0, ptr %1) {
 _llgo_0:
   store i32 %0, ptr @__llgo_argc, align 4
   store ptr %1, ptr @__llgo_argv, align 8
@@ -33,7 +33,7 @@ _llgo_0:
   call void @main.init()
   %2 = call i32 @main.f(i32 100)
   %3 = call i32 (ptr, ...) @printf(ptr @0, i32 %2)
-  ret void
+  ret i32 0
 }
 
 declare void @"github.com/goplus/llgo/internal/runtime.init"()

cl/_testdata/untyped/out.ll

@@ -1,10 +1,10 @@
 ; ModuleID = 'main'
 source_filename = "main"
 
-@main.a = global ptr null
-@"main.init$guard" = global ptr null
-@__llgo_argc = global ptr null
-@__llgo_argv = global ptr null
+@main.a = global double 0.000000e+00, align 8
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
 
 define void @main.init() {
 _llgo_0:
@@ -20,7 +20,7 @@ _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
   ret void
 }
 
-define void @main(i32 %0, ptr %1) {
+define i32 @main(i32 %0, ptr %1) {
 _llgo_0:
   store i32 %0, ptr @__llgo_argc, align 4
   store ptr %1, ptr @__llgo_argv, align 8
@@ -33,7 +33,7 @@ _llgo_1:                                          ; preds = %_llgo_0
   br label %_llgo_2
 
 _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
-  ret void
+  ret i32 0
 }
 
 declare void @"github.com/goplus/llgo/internal/runtime.init"()

cl/_testdata/utf8/in.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"unicode/utf8"
+)
+
+func main() {
+	var str = "中abcd"
+	for i := 0; i < len(str); {
+		r, n := utf8.DecodeRuneInString(str[i:])
+		i += n
+		println(r)
+	}
+	println(index(2) == 3)
+}
+
+var array = [...]uint8{
+	1, 2, 3, 4, 5, 6, 7, 8,
+}
+
+func index(n int8) uint8 {
+	return array[n]
+}

cl/_testdata/utf8/out.ll

@@ -0,0 +1,104 @@
+; ModuleID = 'main'
+source_filename = "main"
+
+%"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 }
+
+@main.array = global [8 x i8] zeroinitializer, align 1
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
+@0 = private unnamed_addr constant [7 x i8] c"\E4\B8\ADabcd", align 1
+
+define i8 @main.index(i8 %0) {
+_llgo_0:
+  %1 = icmp slt i8 %0, 0
+  call void @"github.com/goplus/llgo/internal/runtime.AssertIndexRange"(i1 %1)
+  %2 = zext i8 %0 to i64
+  %3 = getelementptr inbounds i8, ptr @main.array, i64 %2
+  %4 = load i8, ptr %3, align 1
+  ret i8 %4
+}
+
+define void @main.init() {
+_llgo_0:
+  %0 = load i1, ptr @"main.init$guard", align 1
+  br i1 %0, label %_llgo_2, label %_llgo_1
+
+_llgo_1:                                          ; preds = %_llgo_0
+  store i1 true, ptr @"main.init$guard", align 1
+  call void @"unicode/utf8.init"()
+  store i8 1, ptr @main.array, align 1
+  store i8 2, ptr getelementptr inbounds (i8, ptr @main.array, i64 1), align 1
+  store i8 3, ptr getelementptr inbounds (i8, ptr @main.array, i64 2), align 1
+  store i8 4, ptr getelementptr inbounds (i8, ptr @main.array, i64 3), align 1
+  store i8 5, ptr getelementptr inbounds (i8, ptr @main.array, i64 4), align 1
+  store i8 6, ptr getelementptr inbounds (i8, ptr @main.array, i64 5), align 1
+  store i8 7, ptr getelementptr inbounds (i8, ptr @main.array, i64 6), align 1
+  store i8 8, ptr getelementptr inbounds (i8, ptr @main.array, i64 7), align 1
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  ret void
+}
+
+define i32 @main(i32 %0, ptr %1) {
+_llgo_0:
+  store i32 %0, ptr @__llgo_argc, align 4
+  store ptr %1, ptr @__llgo_argv, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.init"()
+  call void @main.init()
+  br label %_llgo_3
+
+_llgo_1:                                          ; preds = %_llgo_3
+  %2 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %3 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %2, i32 0, i32 0
+  store ptr @0, ptr %3, align 8
+  %4 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %2, i32 0, i32 1
+  store i64 7, ptr %4, align 4
+  %5 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %2, align 8
+  %6 = extractvalue %"github.com/goplus/llgo/internal/runtime.String" %5, 1
+  %7 = call %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewStringSlice"(%"github.com/goplus/llgo/internal/runtime.String" %5, i64 %15, i64 %6)
+  %8 = call { i32, i64 } @"unicode/utf8.DecodeRuneInString"(%"github.com/goplus/llgo/internal/runtime.String" %7)
+  %9 = extractvalue { i32, i64 } %8, 0
+  %10 = extractvalue { i32, i64 } %8, 1
+  %11 = add i64 %15, %10
+  %12 = sext i32 %9 to i64
+  call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %12)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
+  br label %_llgo_3
+
+_llgo_2:                                          ; preds = %_llgo_3
+  %13 = call i8 @main.index(i8 2)
+  %14 = icmp eq i8 %13, 3
+  call void @"github.com/goplus/llgo/internal/runtime.PrintBool"(i1 %14)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
+  ret i32 0
+
+_llgo_3:                                          ; preds = %_llgo_1, %_llgo_0
+  %15 = phi i64 [ 0, %_llgo_0 ], [ %11, %_llgo_1 ]
+  %16 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %17 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %16, i32 0, i32 0
+  store ptr @0, ptr %17, align 8
+  %18 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %16, i32 0, i32 1
+  store i64 7, ptr %18, align 4
+  %19 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %16, align 8
+  %20 = extractvalue %"github.com/goplus/llgo/internal/runtime.String" %19, 1
+  %21 = icmp slt i64 %15, %20
+  br i1 %21, label %_llgo_1, label %_llgo_2
+}
+
+declare void @"github.com/goplus/llgo/internal/runtime.AssertIndexRange"(i1)
+
+declare void @"unicode/utf8.init"()
+
+declare void @"github.com/goplus/llgo/internal/runtime.init"()
+
+declare %"github.com/goplus/llgo/internal/runtime.String" @"github.com/goplus/llgo/internal/runtime.NewStringSlice"(%"github.com/goplus/llgo/internal/runtime.String", i64, i64)
+
+declare { i32, i64 } @"unicode/utf8.DecodeRuneInString"(%"github.com/goplus/llgo/internal/runtime.String")
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64)
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8)
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintBool"(i1)

cl/_testdata/vargs/in.go

@@ -1,6 +1,6 @@
 package main
 
-import "github.com/goplus/llgo/internal/runtime/c"
+import "github.com/goplus/llgo/c"
 
 func test(a ...any) {
 	for _, v := range a {

cl/_testdata/vargs/out.ll

@@ -1,13 +1,18 @@
 ; ModuleID = 'main'
 source_filename = "main"
 
-%"github.com/goplus/llgo/internal/runtime.iface" = type { ptr, ptr }
+%"github.com/goplus/llgo/internal/runtime.eface" = type { ptr, ptr }
+%"github.com/goplus/llgo/internal/abi.Type" = type { i64, i64, i32, i8, i8, i8, i8, { ptr, ptr }, ptr, %"github.com/goplus/llgo/internal/runtime.String", ptr }
+%"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 }
 %"github.com/goplus/llgo/internal/runtime.Slice" = type { ptr, i64, i64 }
 
-@"main.init$guard" = global ptr null
-@__llgo_argc = global ptr null
-@__llgo_argv = global ptr null
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
+@_llgo_int = linkonce global ptr null, align 8
 @0 = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1
+@1 = private unnamed_addr constant [21 x i8] c"type assertion failed", align 1
+@_llgo_string = linkonce global ptr null, align 8
 
 define void @main.init() {
 _llgo_0:
@@ -16,34 +21,69 @@ _llgo_0:
 
 _llgo_1:                                          ; preds = %_llgo_0
   store i1 true, ptr @"main.init$guard", align 1
+  call void @"main.init$after"()
   br label %_llgo_2
 
 _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
   ret void
 }
 
-define void @main(i32 %0, ptr %1) {
+define i32 @main(i32 %0, ptr %1) {
 _llgo_0:
   store i32 %0, ptr @__llgo_argc, align 4
   store ptr %1, ptr @__llgo_argv, align 8
   call void @"github.com/goplus/llgo/internal/runtime.init"()
   call void @main.init()
   %2 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 48)
-  %3 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.iface", ptr %2, i64 0
-  %4 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 2)
-  %5 = call %"github.com/goplus/llgo/internal/runtime.iface" @"github.com/goplus/llgo/internal/runtime.MakeAnyInt"(ptr %4, i64 1)
-  store %"github.com/goplus/llgo/internal/runtime.iface" %5, ptr %3, align 8
-  %6 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.iface", ptr %2, i64 1
-  %7 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 2)
-  %8 = call %"github.com/goplus/llgo/internal/runtime.iface" @"github.com/goplus/llgo/internal/runtime.MakeAnyInt"(ptr %7, i64 2)
-  store %"github.com/goplus/llgo/internal/runtime.iface" %8, ptr %6, align 8
-  %9 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.iface", ptr %2, i64 2
-  %10 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 2)
-  %11 = call %"github.com/goplus/llgo/internal/runtime.iface" @"github.com/goplus/llgo/internal/runtime.MakeAnyInt"(ptr %10, i64 3)
-  store %"github.com/goplus/llgo/internal/runtime.iface" %11, ptr %9, align 8
-  %12 = call %"github.com/goplus/llgo/internal/runtime.Slice" @"github.com/goplus/llgo/internal/runtime.NewSlice3"(ptr %2, i64 16, i64 3, i64 0, i64 3, i64 3)
-  call void @main.test(%"github.com/goplus/llgo/internal/runtime.Slice" %12)
-  ret void
+  %3 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %2, i64 0
+  %4 = load ptr, ptr @_llgo_int, align 8
+  %5 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %4, i32 0, i32 6
+  %6 = load i8, ptr %5, align 1
+  %7 = or i8 %6, 32
+  store i8 %7, ptr %5, align 1
+  %8 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %9 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %8, i32 0, i32 0
+  store ptr %4, ptr %9, align 8
+  %10 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %8, i32 0, i32 1
+  store ptr inttoptr (i64 1 to ptr), ptr %10, align 8
+  %11 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %8, align 8
+  store %"github.com/goplus/llgo/internal/runtime.eface" %11, ptr %3, align 8
+  %12 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %2, i64 1
+  %13 = load ptr, ptr @_llgo_int, align 8
+  %14 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %13, i32 0, i32 6
+  %15 = load i8, ptr %14, align 1
+  %16 = or i8 %15, 32
+  store i8 %16, ptr %14, align 1
+  %17 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %18 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %17, i32 0, i32 0
+  store ptr %13, ptr %18, align 8
+  %19 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %17, i32 0, i32 1
+  store ptr inttoptr (i64 2 to ptr), ptr %19, align 8
+  %20 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %17, align 8
+  store %"github.com/goplus/llgo/internal/runtime.eface" %20, ptr %12, align 8
+  %21 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %2, i64 2
+  %22 = load ptr, ptr @_llgo_int, align 8
+  %23 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %22, i32 0, i32 6
+  %24 = load i8, ptr %23, align 1
+  %25 = or i8 %24, 32
+  store i8 %25, ptr %23, align 1
+  %26 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %27 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %26, i32 0, i32 0
+  store ptr %22, ptr %27, align 8
+  %28 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %26, i32 0, i32 1
+  store ptr inttoptr (i64 3 to ptr), ptr %28, align 8
+  %29 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %26, align 8
+  store %"github.com/goplus/llgo/internal/runtime.eface" %29, ptr %21, align 8
+  %30 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
+  %31 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %30, i32 0, i32 0
+  store ptr %2, ptr %31, align 8
+  %32 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %30, i32 0, i32 1
+  store i64 3, ptr %32, align 4
+  %33 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %30, i32 0, i32 2
+  store i64 3, ptr %33, align 4
+  %34 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %30, align 8
+  call void @main.test(%"github.com/goplus/llgo/internal/runtime.Slice" %34)
+  ret i32 0
 }
 
 define void @main.test(%"github.com/goplus/llgo/internal/runtime.Slice" %0) {
@@ -51,35 +91,91 @@ _llgo_0:
   %1 = extractvalue %"github.com/goplus/llgo/internal/runtime.Slice" %0, 1
   br label %_llgo_1
 
-_llgo_1:                                          ; preds = %_llgo_2, %_llgo_0
-  %2 = phi i64 [ -1, %_llgo_0 ], [ %3, %_llgo_2 ]
+_llgo_1:                                          ; preds = %_llgo_4, %_llgo_0
+  %2 = phi i64 [ -1, %_llgo_0 ], [ %3, %_llgo_4 ]
   %3 = add i64 %2, 1
   %4 = icmp slt i64 %3, %1
   br i1 %4, label %_llgo_2, label %_llgo_3
 
 _llgo_2:                                          ; preds = %_llgo_1
-  %5 = extractvalue %"github.com/goplus/llgo/internal/runtime.Slice" %0, 0
-  %6 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.iface", ptr %5, i64 %3
-  %7 = load %"github.com/goplus/llgo/internal/runtime.iface", ptr %6, align 8
-  %8 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 2)
-  %9 = call i64 @"github.com/goplus/llgo/internal/runtime.I2Int"(%"github.com/goplus/llgo/internal/runtime.iface" %7, ptr %8)
-  %10 = call i32 (ptr, ...) @printf(ptr @0, i64 %9)
-  br label %_llgo_1
+  %5 = icmp slt i64 %3, 0
+  call void @"github.com/goplus/llgo/internal/runtime.AssertIndexRange"(i1 %5)
+  %6 = extractvalue %"github.com/goplus/llgo/internal/runtime.Slice" %0, 0
+  %7 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %6, i64 %3
+  %8 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %7, align 8
+  %9 = extractvalue %"github.com/goplus/llgo/internal/runtime.eface" %8, 0
+  %10 = load ptr, ptr @_llgo_int, align 8
+  %11 = icmp eq ptr %9, %10
+  br i1 %11, label %_llgo_4, label %_llgo_5
 
 _llgo_3:                                          ; preds = %_llgo_1
   ret void
+
+_llgo_4:                                          ; preds = %_llgo_2
+  %12 = extractvalue %"github.com/goplus/llgo/internal/runtime.eface" %8, 1
+  %13 = ptrtoint ptr %12 to i64
+  %14 = call i32 (ptr, ...) @printf(ptr @0, i64 %13)
+  br label %_llgo_1
+
+_llgo_5:                                          ; preds = %_llgo_2
+  %15 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %16 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %15, i32 0, i32 0
+  store ptr @1, ptr %16, align 8
+  %17 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %15, i32 0, i32 1
+  store i64 21, ptr %17, align 4
+  %18 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %15, align 8
+  %19 = load ptr, ptr @_llgo_string, align 8
+  %20 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 16)
+  store %"github.com/goplus/llgo/internal/runtime.String" %18, ptr %20, align 8
+  %21 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %22 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %21, i32 0, i32 0
+  store ptr %19, ptr %22, align 8
+  %23 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %21, i32 0, i32 1
+  store ptr %20, ptr %23, align 8
+  %24 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %21, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.Panic"(%"github.com/goplus/llgo/internal/runtime.eface" %24)
+  unreachable
 }
 
 declare void @"github.com/goplus/llgo/internal/runtime.init"()
 
 declare ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64)
 
+define void @"main.init$after"() {
+_llgo_0:
+  %0 = load ptr, ptr @_llgo_int, align 8
+  %1 = icmp eq ptr %0, null
+  br i1 %1, label %_llgo_1, label %_llgo_2
+
+_llgo_1:                                          ; preds = %_llgo_0
+  %2 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 2)
+  store ptr %2, ptr @_llgo_int, align 8
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  %3 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %2, i32 0, i32 6
+  %4 = load i8, ptr %3, align 1
+  %5 = or i8 %4, 32
+  store i8 %5, ptr %3, align 1
+  %6 = load ptr, ptr @_llgo_string, align 8
+  %7 = icmp eq ptr %6, null
+  br i1 %7, label %_llgo_3, label %_llgo_4
+
+_llgo_3:                                          ; preds = %_llgo_2
+  %8 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 24)
+  store ptr %8, ptr @_llgo_string, align 8
+  br label %_llgo_4
+
+_llgo_4:                                          ; preds = %_llgo_3, %_llgo_2
+  ret void
+}
+
 declare ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64)
 
-declare %"github.com/goplus/llgo/internal/runtime.iface" @"github.com/goplus/llgo/internal/runtime.MakeAnyInt"(ptr, i64)
+declare void @"github.com/goplus/llgo/internal/runtime.AssertIndexRange"(i1)
 
-declare %"github.com/goplus/llgo/internal/runtime.Slice" @"github.com/goplus/llgo/internal/runtime.NewSlice3"(ptr, i64, i64, i64, i64, i64)
+declare ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64)
 
-declare i64 @"github.com/goplus/llgo/internal/runtime.I2Int"(%"github.com/goplus/llgo/internal/runtime.iface", ptr)
+declare void @"github.com/goplus/llgo/internal/runtime.Panic"(%"github.com/goplus/llgo/internal/runtime.eface")
 
 declare i32 @printf(ptr, ...)

cl/_testdata/varinit/out.ll

@@ -1,10 +1,10 @@
 ; ModuleID = 'main'
 source_filename = "main"
 
-@main.a = global ptr null
-@"main.init$guard" = global ptr null
-@__llgo_argc = global ptr null
-@__llgo_argv = global ptr null
+@main.a = global i64 0, align 8
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
 
 define void @main.init() {
 _llgo_0:
@@ -20,7 +20,7 @@ _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
   ret void
 }
 
-define void @main(i32 %0, ptr %1) {
+define i32 @main(i32 %0, ptr %1) {
 _llgo_0:
   store i32 %0, ptr @__llgo_argc, align 4
   store ptr %1, ptr @__llgo_argv, align 8
@@ -30,7 +30,7 @@ _llgo_0:
   %3 = add i64 %2, 1
   store i64 %3, ptr @main.a, align 4
   %4 = load i64, ptr @main.a, align 4
-  ret void
+  ret i32 0
 }
 
 declare void @"github.com/goplus/llgo/internal/runtime.init"()

cl/_testdefer/firstloop1/in.go

@@ -0,0 +1,16 @@
+package foo
+
+func f(s string) bool {
+	return len(s) > 2
+}
+
+func Loop() {
+	for i := 0; i < 3; i++ {
+		if s := "hello"; f(s) {
+			defer println(s)
+		} else {
+			defer println("world")
+			return
+		}
+	}
+}

cl/_testdefer/firstloop1/out.txt

@@ -0,0 +1,7 @@
+ 0: always
+ 6: cond
+ 3: loop
+ 1: loop
+ 4: loop
+ 2: cond
+ 5: cond

cl/_testdefer/firstloop2/in.go

@@ -0,0 +1,7 @@
+package foo
+
+func Loop() {
+	for i := 0; i < 3; i++ {
+		println(i)
+	}
+}

cl/_testdefer/firstloop2/out.txt

@@ -0,0 +1,4 @@
+ 0: always
+ 3: loop
+ 1: loop
+ 2: always

cl/_testdefer/loop/in.go

@@ -0,0 +1,20 @@
+package main
+
+func f(s string) bool {
+	return len(s) > 2
+}
+
+func main() {
+	defer func() {
+		println("hi")
+	}()
+	for i := 0; i < 3; i++ {
+		if s := "hello"; f(s) {
+			defer println(s)
+		} else {
+			defer println("world")
+			return
+		}
+	}
+	defer println("bye")
+}

cl/_testdefer/loop/out.txt

@@ -0,0 +1,7 @@
+ 0: always
+ 1: cond
+ 4: loop
+ 2: loop
+ 5: loop
+ 3: cond
+ 6: cond

cl/_testdefer/multiret/in.go

@@ -0,0 +1,18 @@
+package main
+
+func f(s string) bool {
+	return len(s) > 2
+}
+
+func main() {
+	defer func() {
+		println("hi")
+	}()
+	if s := "hello"; f(s) {
+		defer println(s)
+	} else {
+		defer println("world")
+		return
+	}
+	defer println("bye")
+}

cl/_testdefer/multiret/out.txt

@@ -0,0 +1,4 @@
+ 0: always
+ 1: cond
+ 2: cond
+ 3: cond

cl/_testdefer/print/in.go

@@ -0,0 +1,52 @@
+package main
+
+func f() float64 {
+	return 1.0
+}
+
+func main() {
+	var v = f()
+	const n = 7 // digits printed
+	var buf [n + 7]byte
+	buf[0] = '+'
+	e := 0 // exp
+	if v == 0 {
+		if 1/v < 0 {
+			buf[0] = '-'
+		}
+	} else {
+		if v < 0 {
+			v = -v
+			buf[0] = '-'
+		}
+
+		// normalize
+		for v >= 10 {
+			e++
+			v /= 10
+		}
+		for v < 1 {
+			e--
+			v *= 10
+		}
+
+		// round
+		h := 5.0
+		for i := 0; i < n; i++ {
+			h /= 10
+		}
+		v += h
+		if v >= 10 {
+			e++
+			v /= 10
+		}
+	}
+
+	// format +d.dddd+edd
+	for i := 0; i < n; i++ {
+		s := int(v)
+		buf[i+2] = byte(s + '0')
+		v -= float64(s)
+		v *= 10
+	}
+}

cl/_testdefer/print/out.txt

@@ -0,0 +1,18 @@
+ 0: always
+ 1: cond
+ 3: cond
+ 4: cond
+ 5: cond
+ 7: loop
+ 6: loop
+10: loop
+ 8: loop
+ 9: cond
+13: loop
+11: loop
+12: cond
+14: cond
+ 2: cond
+17: loop
+15: loop
+16: always

cl/_testdefer/singleret/in.go

@@ -0,0 +1,17 @@
+package main
+
+func f(s string) bool {
+	return len(s) > 2
+}
+
+func main() {
+	defer func() {
+		println("hi")
+	}()
+	if s := "hello"; f(s) {
+		defer println(s)
+	} else {
+		defer println("world")
+	}
+	defer println("bye")
+}

cl/_testdefer/singleret/out.txt

@@ -0,0 +1,5 @@
+ 0: always
+ 1: cond
+ 2: cond
+ 4: cond
+ 3: always

cl/_testgo/defer1/in.go

@@ -0,0 +1,18 @@
+package main
+
+func f(s string) bool {
+	return len(s) > 2
+}
+
+func main() {
+	defer func() {
+		println("hi")
+	}()
+	if s := "hello"; f(s) {
+		defer println(s)
+	} else {
+		defer println("world")
+		return
+	}
+	defer println("bye")
+}

cl/_testgo/defer1/out.ll

@@ -0,0 +1 @@
+;

cl/_testgo/defer2/in.go

@@ -0,0 +1,15 @@
+package main
+
+func f(s string) bool {
+	return len(s) > 2
+}
+
+func main() {
+	if s := "hello"; f(s) {
+		defer println(s)
+	} else {
+		defer println("world")
+		return
+	}
+	defer println("bye")
+}

cl/_testgo/defer2/out.ll

@@ -0,0 +1 @@
+;

cl/_testgo/defer3/in.go

@@ -0,0 +1,24 @@
+package main
+
+func f(s string) bool {
+	return len(s) > 2
+}
+
+func fail() {
+	defer println("bye")
+	panic("panic message")
+}
+
+func main() {
+	defer func() {
+		println("hi")
+	}()
+	if s := "hello"; f(s) {
+		defer println(s)
+	} else {
+		defer println("world")
+		return
+	}
+	fail()
+	println("unreachable")
+}

cl/_testgo/defer3/out.ll

@@ -0,0 +1 @@
+;

cl/_testgo/defer4/in.go

@@ -0,0 +1,29 @@
+package main
+
+func f(s string) bool {
+	return len(s) > 2
+}
+
+func fail() {
+	defer println("bye")
+	defer func() {
+		if e := recover(); e != nil {
+			println("recover:", e.(string))
+		}
+	}()
+	panic("panic message")
+}
+
+func main() {
+	defer func() {
+		println("hi")
+	}()
+	if s := "hello"; f(s) {
+		defer println(s)
+	} else {
+		defer println("world")
+		return
+	}
+	fail()
+	println("reachable")
+}

cl/_testgo/defer4/out.ll

@@ -0,0 +1 @@
+;

cl/_testgo/equal/in.go

@@ -0,0 +1,87 @@
+package main
+
+func test() {}
+
+// func
+func init() {
+	fn1 := test
+	fn2 := func(i, j int) int { return i + j }
+	var n int
+	fn3 := func() { println(n) }
+	var fn4 func() int
+	assert(test != nil)
+	assert(fn1 != nil)
+	assert(fn2 != nil)
+	assert(fn3 != nil)
+	assert(fn4 == nil)
+}
+
+// array
+func init() {
+	assert([0]float64{} == [0]float64{})
+	ar1 := [...]int{1, 2, 3}
+	ar2 := [...]int{1, 2, 3}
+	assert(ar1 == ar2)
+	ar2[1] = 1
+	assert(ar1 != ar2)
+}
+
+type T struct {
+	X int
+	Y int
+	Z string
+	V any
+}
+
+type N struct{}
+
+// struct
+func init() {
+	var n1, n2 N
+	var t1, t2 T
+	x := T{10, 20, "hello", 1}
+	y := T{10, 20, "hello", 1}
+	z := T{10, 20, "hello", "ok"}
+	assert(n1 == n2)
+	assert(t1 == t2)
+	assert(x == y)
+	assert(x != z)
+	assert(y != z)
+}
+
+// slice
+func init() {
+	var a []int
+	var b = []int{1, 2, 3}
+	c := make([]int, 2)
+	d := make([]int, 0, 2)
+	assert(a == nil)
+	assert(b != nil)
+	assert(c != nil)
+	assert(d != nil)
+	b = nil
+	assert(b == nil)
+}
+
+// iface
+func init() {
+	var a any = 100
+	var b any = struct{}{}
+	var c any = T{10, 20, "hello", 1}
+	x := T{10, 20, "hello", 1}
+	y := T{10, 20, "hello", "ok"}
+	assert(a == 100)
+	assert(b == struct{}{})
+	assert(b != N{})
+	assert(c == x)
+	assert(c != y)
+}
+
+func assert(cond bool) {
+	if !cond {
+		panic("failed")
+	}
+}
+
+func main() {
+}

cl/_testgo/equal/out.ll

@@ -0,0 +1,821 @@
+; ModuleID = 'main'
+source_filename = "main"
+
+%"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 }
+%"github.com/goplus/llgo/internal/runtime.eface" = type { ptr, ptr }
+%main.T = type { i64, i64, %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.eface" }
+%"github.com/goplus/llgo/internal/abi.Type" = type { i64, i64, i32, i8, i8, i8, i8, { ptr, ptr }, ptr, %"github.com/goplus/llgo/internal/runtime.String", ptr }
+%"github.com/goplus/llgo/internal/runtime.Slice" = type { ptr, i64, i64 }
+%main.N = type {}
+%"github.com/goplus/llgo/internal/abi.StructField" = type { %"github.com/goplus/llgo/internal/runtime.String", ptr, i64, %"github.com/goplus/llgo/internal/runtime.String", i1 }
+
+@"main.init$guard" = global i1 false, align 1
+@0 = private unnamed_addr constant [6 x i8] c"failed", align 1
+@_llgo_string = linkonce global ptr null, align 8
+@1 = private unnamed_addr constant [5 x i8] c"hello", align 1
+@_llgo_int = linkonce global ptr null, align 8
+@2 = private unnamed_addr constant [2 x i8] c"ok", align 1
+@"_llgo_struct$n1H8J_3prDN3firMwPxBLVTkE5hJ9Di-AqNvaC9jczw" = linkonce global ptr null, align 8
+@3 = private unnamed_addr constant [4 x i8] c"main", align 1
+@_llgo_main.T = linkonce global ptr null, align 8
+@"_llgo_struct$5D_KhR3tDEp-wpx9caTiVZca43wS-XW6slE9Bsr8rsk" = linkonce global ptr null, align 8
+@_llgo_any = linkonce global ptr null, align 8
+@4 = private unnamed_addr constant [1 x i8] c"X", align 1
+@5 = private unnamed_addr constant [1 x i8] c"Y", align 1
+@6 = private unnamed_addr constant [1 x i8] c"Z", align 1
+@7 = private unnamed_addr constant [1 x i8] c"V", align 1
+@8 = private unnamed_addr constant [6 x i8] c"main.T", align 1
+@_llgo_main.N = linkonce global ptr null, align 8
+@9 = private unnamed_addr constant [6 x i8] c"main.N", align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
+
+define void @main.assert(i1 %0) {
+_llgo_0:
+  br i1 %0, label %_llgo_2, label %_llgo_1
+
+_llgo_1:                                          ; preds = %_llgo_0
+  %1 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %2 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %1, i32 0, i32 0
+  store ptr @0, ptr %2, align 8
+  %3 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %1, i32 0, i32 1
+  store i64 6, ptr %3, align 4
+  %4 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %1, align 8
+  %5 = load ptr, ptr @_llgo_string, align 8
+  %6 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 16)
+  store %"github.com/goplus/llgo/internal/runtime.String" %4, ptr %6, align 8
+  %7 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %8 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %7, i32 0, i32 0
+  store ptr %5, ptr %8, align 8
+  %9 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %7, i32 0, i32 1
+  store ptr %6, ptr %9, align 8
+  %10 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %7, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.Panic"(%"github.com/goplus/llgo/internal/runtime.eface" %10)
+  unreachable
+
+_llgo_2:                                          ; preds = %_llgo_0
+  ret void
+}
+
+define void @main.init() {
+_llgo_0:
+  %0 = load i1, ptr @"main.init$guard", align 1
+  br i1 %0, label %_llgo_2, label %_llgo_1
+
+_llgo_1:                                          ; preds = %_llgo_0
+  store i1 true, ptr @"main.init$guard", align 1
+  call void @"main.init$after"()
+  call void @"main.init#1"()
+  call void @"main.init#2"()
+  call void @"main.init#3"()
+  call void @"main.init#4"()
+  call void @"main.init#5"()
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  ret void
+}
+
+define void @"main.init#1"() {
+_llgo_0:
+  %0 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 8)
+  %1 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 8)
+  %2 = getelementptr inbounds { ptr }, ptr %1, i32 0, i32 0
+  store ptr %0, ptr %2, align 8
+  %3 = alloca { ptr, ptr }, align 8
+  %4 = getelementptr inbounds { ptr, ptr }, ptr %3, i32 0, i32 0
+  store ptr @"main.init#1$2", ptr %4, align 8
+  %5 = getelementptr inbounds { ptr, ptr }, ptr %3, i32 0, i32 1
+  store ptr %1, ptr %5, align 8
+  %6 = load { ptr, ptr }, ptr %3, align 8
+  call void @main.assert(i1 true)
+  call void @main.assert(i1 true)
+  call void @main.assert(i1 true)
+  %7 = extractvalue { ptr, ptr } %6, 0
+  %8 = icmp ne ptr %7, null
+  call void @main.assert(i1 %8)
+  call void @main.assert(i1 true)
+  ret void
+}
+
+define void @"main.init#2"() {
+_llgo_0:
+  call void @main.assert(i1 true)
+  %0 = alloca [3 x i64], align 8
+  %1 = call ptr @"github.com/goplus/llgo/internal/runtime.Zeroinit"(ptr %0, i64 24)
+  %2 = getelementptr inbounds i64, ptr %1, i64 0
+  %3 = getelementptr inbounds i64, ptr %1, i64 1
+  %4 = getelementptr inbounds i64, ptr %1, i64 2
+  store i64 1, ptr %2, align 4
+  store i64 2, ptr %3, align 4
+  store i64 3, ptr %4, align 4
+  %5 = alloca [3 x i64], align 8
+  %6 = call ptr @"github.com/goplus/llgo/internal/runtime.Zeroinit"(ptr %5, i64 24)
+  %7 = getelementptr inbounds i64, ptr %6, i64 0
+  %8 = getelementptr inbounds i64, ptr %6, i64 1
+  %9 = getelementptr inbounds i64, ptr %6, i64 2
+  store i64 1, ptr %7, align 4
+  store i64 2, ptr %8, align 4
+  store i64 3, ptr %9, align 4
+  %10 = load [3 x i64], ptr %1, align 4
+  %11 = load [3 x i64], ptr %6, align 4
+  %12 = extractvalue [3 x i64] %10, 0
+  %13 = extractvalue [3 x i64] %11, 0
+  %14 = icmp eq i64 %12, %13
+  %15 = and i1 true, %14
+  %16 = extractvalue [3 x i64] %10, 1
+  %17 = extractvalue [3 x i64] %11, 1
+  %18 = icmp eq i64 %16, %17
+  %19 = and i1 %15, %18
+  %20 = extractvalue [3 x i64] %10, 2
+  %21 = extractvalue [3 x i64] %11, 2
+  %22 = icmp eq i64 %20, %21
+  %23 = and i1 %19, %22
+  call void @main.assert(i1 %23)
+  %24 = getelementptr inbounds i64, ptr %6, i64 1
+  store i64 1, ptr %24, align 4
+  %25 = load [3 x i64], ptr %1, align 4
+  %26 = load [3 x i64], ptr %6, align 4
+  %27 = extractvalue [3 x i64] %25, 0
+  %28 = extractvalue [3 x i64] %26, 0
+  %29 = icmp eq i64 %27, %28
+  %30 = and i1 true, %29
+  %31 = extractvalue [3 x i64] %25, 1
+  %32 = extractvalue [3 x i64] %26, 1
+  %33 = icmp eq i64 %31, %32
+  %34 = and i1 %30, %33
+  %35 = extractvalue [3 x i64] %25, 2
+  %36 = extractvalue [3 x i64] %26, 2
+  %37 = icmp eq i64 %35, %36
+  %38 = and i1 %34, %37
+  %39 = xor i1 %38, true
+  call void @main.assert(i1 %39)
+  ret void
+}
+
+define void @"main.init#3"() {
+_llgo_0:
+  %0 = alloca %main.T, align 8
+  %1 = call ptr @"github.com/goplus/llgo/internal/runtime.Zeroinit"(ptr %0, i64 48)
+  %2 = getelementptr inbounds %main.T, ptr %1, i32 0, i32 0
+  %3 = getelementptr inbounds %main.T, ptr %1, i32 0, i32 1
+  %4 = getelementptr inbounds %main.T, ptr %1, i32 0, i32 2
+  %5 = getelementptr inbounds %main.T, ptr %1, i32 0, i32 3
+  store i64 10, ptr %2, align 4
+  store i64 20, ptr %3, align 4
+  %6 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %7 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %6, i32 0, i32 0
+  store ptr @1, ptr %7, align 8
+  %8 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %6, i32 0, i32 1
+  store i64 5, ptr %8, align 4
+  %9 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %6, align 8
+  store %"github.com/goplus/llgo/internal/runtime.String" %9, ptr %4, align 8
+  %10 = load ptr, ptr @_llgo_int, align 8
+  %11 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %10, i32 0, i32 6
+  %12 = load i8, ptr %11, align 1
+  %13 = or i8 %12, 32
+  store i8 %13, ptr %11, align 1
+  %14 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %15 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %14, i32 0, i32 0
+  store ptr %10, ptr %15, align 8
+  %16 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %14, i32 0, i32 1
+  store ptr inttoptr (i64 1 to ptr), ptr %16, align 8
+  %17 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %14, align 8
+  store %"github.com/goplus/llgo/internal/runtime.eface" %17, ptr %5, align 8
+  %18 = alloca %main.T, align 8
+  %19 = call ptr @"github.com/goplus/llgo/internal/runtime.Zeroinit"(ptr %18, i64 48)
+  %20 = getelementptr inbounds %main.T, ptr %19, i32 0, i32 0
+  %21 = getelementptr inbounds %main.T, ptr %19, i32 0, i32 1
+  %22 = getelementptr inbounds %main.T, ptr %19, i32 0, i32 2
+  %23 = getelementptr inbounds %main.T, ptr %19, i32 0, i32 3
+  store i64 10, ptr %20, align 4
+  store i64 20, ptr %21, align 4
+  %24 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %25 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %24, i32 0, i32 0
+  store ptr @1, ptr %25, align 8
+  %26 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %24, i32 0, i32 1
+  store i64 5, ptr %26, align 4
+  %27 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %24, align 8
+  store %"github.com/goplus/llgo/internal/runtime.String" %27, ptr %22, align 8
+  %28 = load ptr, ptr @_llgo_int, align 8
+  %29 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %28, i32 0, i32 6
+  %30 = load i8, ptr %29, align 1
+  %31 = or i8 %30, 32
+  store i8 %31, ptr %29, align 1
+  %32 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %33 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %32, i32 0, i32 0
+  store ptr %28, ptr %33, align 8
+  %34 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %32, i32 0, i32 1
+  store ptr inttoptr (i64 1 to ptr), ptr %34, align 8
+  %35 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %32, align 8
+  store %"github.com/goplus/llgo/internal/runtime.eface" %35, ptr %23, align 8
+  %36 = alloca %main.T, align 8
+  %37 = call ptr @"github.com/goplus/llgo/internal/runtime.Zeroinit"(ptr %36, i64 48)
+  %38 = getelementptr inbounds %main.T, ptr %37, i32 0, i32 0
+  %39 = getelementptr inbounds %main.T, ptr %37, i32 0, i32 1
+  %40 = getelementptr inbounds %main.T, ptr %37, i32 0, i32 2
+  %41 = getelementptr inbounds %main.T, ptr %37, i32 0, i32 3
+  store i64 10, ptr %38, align 4
+  store i64 20, ptr %39, align 4
+  %42 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %43 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %42, i32 0, i32 0
+  store ptr @1, ptr %43, align 8
+  %44 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %42, i32 0, i32 1
+  store i64 5, ptr %44, align 4
+  %45 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %42, align 8
+  store %"github.com/goplus/llgo/internal/runtime.String" %45, ptr %40, align 8
+  %46 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %47 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %46, i32 0, i32 0
+  store ptr @2, ptr %47, align 8
+  %48 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %46, i32 0, i32 1
+  store i64 2, ptr %48, align 4
+  %49 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %46, align 8
+  %50 = load ptr, ptr @_llgo_string, align 8
+  %51 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 16)
+  store %"github.com/goplus/llgo/internal/runtime.String" %49, ptr %51, align 8
+  %52 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %53 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %52, i32 0, i32 0
+  store ptr %50, ptr %53, align 8
+  %54 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %52, i32 0, i32 1
+  store ptr %51, ptr %54, align 8
+  %55 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %52, align 8
+  store %"github.com/goplus/llgo/internal/runtime.eface" %55, ptr %41, align 8
+  call void @main.assert(i1 true)
+  %56 = call i1 @"github.com/goplus/llgo/internal/runtime.StringEqual"(%"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer)
+  %57 = and i1 true, %56
+  %58 = call i1 @"github.com/goplus/llgo/internal/runtime.EfaceEqual"(%"github.com/goplus/llgo/internal/runtime.eface" zeroinitializer, %"github.com/goplus/llgo/internal/runtime.eface" zeroinitializer)
+  %59 = and i1 %57, %58
+  call void @main.assert(i1 %59)
+  %60 = load %main.T, ptr %1, align 8
+  %61 = load %main.T, ptr %19, align 8
+  %62 = extractvalue %main.T %60, 0
+  %63 = extractvalue %main.T %61, 0
+  %64 = icmp eq i64 %62, %63
+  %65 = and i1 true, %64
+  %66 = extractvalue %main.T %60, 1
+  %67 = extractvalue %main.T %61, 1
+  %68 = icmp eq i64 %66, %67
+  %69 = and i1 %65, %68
+  %70 = extractvalue %main.T %60, 2
+  %71 = extractvalue %main.T %61, 2
+  %72 = call i1 @"github.com/goplus/llgo/internal/runtime.StringEqual"(%"github.com/goplus/llgo/internal/runtime.String" %70, %"github.com/goplus/llgo/internal/runtime.String" %71)
+  %73 = and i1 %69, %72
+  %74 = extractvalue %main.T %60, 3
+  %75 = extractvalue %main.T %61, 3
+  %76 = call i1 @"github.com/goplus/llgo/internal/runtime.EfaceEqual"(%"github.com/goplus/llgo/internal/runtime.eface" %74, %"github.com/goplus/llgo/internal/runtime.eface" %75)
+  %77 = and i1 %73, %76
+  call void @main.assert(i1 %77)
+  %78 = load %main.T, ptr %1, align 8
+  %79 = load %main.T, ptr %37, align 8
+  %80 = extractvalue %main.T %78, 0
+  %81 = extractvalue %main.T %79, 0
+  %82 = icmp eq i64 %80, %81
+  %83 = and i1 true, %82
+  %84 = extractvalue %main.T %78, 1
+  %85 = extractvalue %main.T %79, 1
+  %86 = icmp eq i64 %84, %85
+  %87 = and i1 %83, %86
+  %88 = extractvalue %main.T %78, 2
+  %89 = extractvalue %main.T %79, 2
+  %90 = call i1 @"github.com/goplus/llgo/internal/runtime.StringEqual"(%"github.com/goplus/llgo/internal/runtime.String" %88, %"github.com/goplus/llgo/internal/runtime.String" %89)
+  %91 = and i1 %87, %90
+  %92 = extractvalue %main.T %78, 3
+  %93 = extractvalue %main.T %79, 3
+  %94 = call i1 @"github.com/goplus/llgo/internal/runtime.EfaceEqual"(%"github.com/goplus/llgo/internal/runtime.eface" %92, %"github.com/goplus/llgo/internal/runtime.eface" %93)
+  %95 = and i1 %91, %94
+  %96 = xor i1 %95, true
+  call void @main.assert(i1 %96)
+  %97 = load %main.T, ptr %19, align 8
+  %98 = load %main.T, ptr %37, align 8
+  %99 = extractvalue %main.T %97, 0
+  %100 = extractvalue %main.T %98, 0
+  %101 = icmp eq i64 %99, %100
+  %102 = and i1 true, %101
+  %103 = extractvalue %main.T %97, 1
+  %104 = extractvalue %main.T %98, 1
+  %105 = icmp eq i64 %103, %104
+  %106 = and i1 %102, %105
+  %107 = extractvalue %main.T %97, 2
+  %108 = extractvalue %main.T %98, 2
+  %109 = call i1 @"github.com/goplus/llgo/internal/runtime.StringEqual"(%"github.com/goplus/llgo/internal/runtime.String" %107, %"github.com/goplus/llgo/internal/runtime.String" %108)
+  %110 = and i1 %106, %109
+  %111 = extractvalue %main.T %97, 3
+  %112 = extractvalue %main.T %98, 3
+  %113 = call i1 @"github.com/goplus/llgo/internal/runtime.EfaceEqual"(%"github.com/goplus/llgo/internal/runtime.eface" %111, %"github.com/goplus/llgo/internal/runtime.eface" %112)
+  %114 = and i1 %110, %113
+  %115 = xor i1 %114, true
+  call void @main.assert(i1 %115)
+  ret void
+}
+
+define void @"main.init#4"() {
+_llgo_0:
+  %0 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 24)
+  %1 = getelementptr inbounds i64, ptr %0, i64 0
+  store i64 1, ptr %1, align 4
+  %2 = getelementptr inbounds i64, ptr %0, i64 1
+  store i64 2, ptr %2, align 4
+  %3 = getelementptr inbounds i64, ptr %0, i64 2
+  store i64 3, ptr %3, align 4
+  %4 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
+  %5 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %4, i32 0, i32 0
+  store ptr %0, ptr %5, align 8
+  %6 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %4, i32 0, i32 1
+  store i64 3, ptr %6, align 4
+  %7 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %4, i32 0, i32 2
+  store i64 3, ptr %7, align 4
+  %8 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %4, align 8
+  %9 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 16)
+  %10 = call %"github.com/goplus/llgo/internal/runtime.Slice" @"github.com/goplus/llgo/internal/runtime.NewSlice3"(ptr %9, i64 8, i64 2, i64 0, i64 2, i64 2)
+  %11 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 16)
+  %12 = call %"github.com/goplus/llgo/internal/runtime.Slice" @"github.com/goplus/llgo/internal/runtime.NewSlice3"(ptr %11, i64 8, i64 2, i64 0, i64 0, i64 2)
+  call void @main.assert(i1 true)
+  %13 = extractvalue %"github.com/goplus/llgo/internal/runtime.Slice" %8, 0
+  %14 = icmp ne ptr %13, null
+  call void @main.assert(i1 %14)
+  %15 = extractvalue %"github.com/goplus/llgo/internal/runtime.Slice" %10, 0
+  %16 = icmp ne ptr %15, null
+  call void @main.assert(i1 %16)
+  %17 = extractvalue %"github.com/goplus/llgo/internal/runtime.Slice" %12, 0
+  %18 = icmp ne ptr %17, null
+  call void @main.assert(i1 %18)
+  call void @main.assert(i1 true)
+  ret void
+}
+
+define void @"main.init#5"() {
+_llgo_0:
+  %0 = load ptr, ptr @_llgo_int, align 8
+  %1 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %0, i32 0, i32 6
+  %2 = load i8, ptr %1, align 1
+  %3 = or i8 %2, 32
+  store i8 %3, ptr %1, align 1
+  %4 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %5 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %4, i32 0, i32 0
+  store ptr %0, ptr %5, align 8
+  %6 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %4, i32 0, i32 1
+  store ptr inttoptr (i64 100 to ptr), ptr %6, align 8
+  %7 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %4, align 8
+  %8 = load ptr, ptr @"_llgo_struct$n1H8J_3prDN3firMwPxBLVTkE5hJ9Di-AqNvaC9jczw", align 8
+  %9 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 0)
+  store {} zeroinitializer, ptr %9, align 1
+  %10 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %11 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %10, i32 0, i32 0
+  store ptr %8, ptr %11, align 8
+  %12 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %10, i32 0, i32 1
+  store ptr %9, ptr %12, align 8
+  %13 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %10, align 8
+  %14 = alloca %main.T, align 8
+  %15 = call ptr @"github.com/goplus/llgo/internal/runtime.Zeroinit"(ptr %14, i64 48)
+  %16 = getelementptr inbounds %main.T, ptr %15, i32 0, i32 0
+  %17 = getelementptr inbounds %main.T, ptr %15, i32 0, i32 1
+  %18 = getelementptr inbounds %main.T, ptr %15, i32 0, i32 2
+  %19 = getelementptr inbounds %main.T, ptr %15, i32 0, i32 3
+  store i64 10, ptr %16, align 4
+  store i64 20, ptr %17, align 4
+  %20 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %21 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %20, i32 0, i32 0
+  store ptr @1, ptr %21, align 8
+  %22 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %20, i32 0, i32 1
+  store i64 5, ptr %22, align 4
+  %23 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %20, align 8
+  store %"github.com/goplus/llgo/internal/runtime.String" %23, ptr %18, align 8
+  %24 = load ptr, ptr @_llgo_int, align 8
+  %25 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %24, i32 0, i32 6
+  %26 = load i8, ptr %25, align 1
+  %27 = or i8 %26, 32
+  store i8 %27, ptr %25, align 1
+  %28 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %29 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %28, i32 0, i32 0
+  store ptr %24, ptr %29, align 8
+  %30 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %28, i32 0, i32 1
+  store ptr inttoptr (i64 1 to ptr), ptr %30, align 8
+  %31 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %28, align 8
+  store %"github.com/goplus/llgo/internal/runtime.eface" %31, ptr %19, align 8
+  %32 = load %main.T, ptr %15, align 8
+  %33 = load ptr, ptr @_llgo_main.T, align 8
+  %34 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 48)
+  store %main.T %32, ptr %34, align 8
+  %35 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %36 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %35, i32 0, i32 0
+  store ptr %33, ptr %36, align 8
+  %37 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %35, i32 0, i32 1
+  store ptr %34, ptr %37, align 8
+  %38 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %35, align 8
+  %39 = alloca %main.T, align 8
+  %40 = call ptr @"github.com/goplus/llgo/internal/runtime.Zeroinit"(ptr %39, i64 48)
+  %41 = getelementptr inbounds %main.T, ptr %40, i32 0, i32 0
+  %42 = getelementptr inbounds %main.T, ptr %40, i32 0, i32 1
+  %43 = getelementptr inbounds %main.T, ptr %40, i32 0, i32 2
+  %44 = getelementptr inbounds %main.T, ptr %40, i32 0, i32 3
+  store i64 10, ptr %41, align 4
+  store i64 20, ptr %42, align 4
+  %45 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %46 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %45, i32 0, i32 0
+  store ptr @1, ptr %46, align 8
+  %47 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %45, i32 0, i32 1
+  store i64 5, ptr %47, align 4
+  %48 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %45, align 8
+  store %"github.com/goplus/llgo/internal/runtime.String" %48, ptr %43, align 8
+  %49 = load ptr, ptr @_llgo_int, align 8
+  %50 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %49, i32 0, i32 6
+  %51 = load i8, ptr %50, align 1
+  %52 = or i8 %51, 32
+  store i8 %52, ptr %50, align 1
+  %53 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %54 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %53, i32 0, i32 0
+  store ptr %49, ptr %54, align 8
+  %55 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %53, i32 0, i32 1
+  store ptr inttoptr (i64 1 to ptr), ptr %55, align 8
+  %56 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %53, align 8
+  store %"github.com/goplus/llgo/internal/runtime.eface" %56, ptr %44, align 8
+  %57 = alloca %main.T, align 8
+  %58 = call ptr @"github.com/goplus/llgo/internal/runtime.Zeroinit"(ptr %57, i64 48)
+  %59 = getelementptr inbounds %main.T, ptr %58, i32 0, i32 0
+  %60 = getelementptr inbounds %main.T, ptr %58, i32 0, i32 1
+  %61 = getelementptr inbounds %main.T, ptr %58, i32 0, i32 2
+  %62 = getelementptr inbounds %main.T, ptr %58, i32 0, i32 3
+  store i64 10, ptr %59, align 4
+  store i64 20, ptr %60, align 4
+  %63 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %64 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %63, i32 0, i32 0
+  store ptr @1, ptr %64, align 8
+  %65 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %63, i32 0, i32 1
+  store i64 5, ptr %65, align 4
+  %66 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %63, align 8
+  store %"github.com/goplus/llgo/internal/runtime.String" %66, ptr %61, align 8
+  %67 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %68 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %67, i32 0, i32 0
+  store ptr @2, ptr %68, align 8
+  %69 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %67, i32 0, i32 1
+  store i64 2, ptr %69, align 4
+  %70 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %67, align 8
+  %71 = load ptr, ptr @_llgo_string, align 8
+  %72 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 16)
+  store %"github.com/goplus/llgo/internal/runtime.String" %70, ptr %72, align 8
+  %73 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %74 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %73, i32 0, i32 0
+  store ptr %71, ptr %74, align 8
+  %75 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %73, i32 0, i32 1
+  store ptr %72, ptr %75, align 8
+  %76 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %73, align 8
+  store %"github.com/goplus/llgo/internal/runtime.eface" %76, ptr %62, align 8
+  %77 = load ptr, ptr @_llgo_int, align 8
+  %78 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %77, i32 0, i32 6
+  %79 = load i8, ptr %78, align 1
+  %80 = or i8 %79, 32
+  store i8 %80, ptr %78, align 1
+  %81 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %82 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %81, i32 0, i32 0
+  store ptr %77, ptr %82, align 8
+  %83 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %81, i32 0, i32 1
+  store ptr inttoptr (i64 100 to ptr), ptr %83, align 8
+  %84 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %81, align 8
+  %85 = call i1 @"github.com/goplus/llgo/internal/runtime.EfaceEqual"(%"github.com/goplus/llgo/internal/runtime.eface" %7, %"github.com/goplus/llgo/internal/runtime.eface" %84)
+  call void @main.assert(i1 %85)
+  %86 = load ptr, ptr @"_llgo_struct$n1H8J_3prDN3firMwPxBLVTkE5hJ9Di-AqNvaC9jczw", align 8
+  %87 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 0)
+  store {} zeroinitializer, ptr %87, align 1
+  %88 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %89 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %88, i32 0, i32 0
+  store ptr %86, ptr %89, align 8
+  %90 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %88, i32 0, i32 1
+  store ptr %87, ptr %90, align 8
+  %91 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %88, align 8
+  %92 = call i1 @"github.com/goplus/llgo/internal/runtime.EfaceEqual"(%"github.com/goplus/llgo/internal/runtime.eface" %13, %"github.com/goplus/llgo/internal/runtime.eface" %91)
+  call void @main.assert(i1 %92)
+  %93 = load ptr, ptr @_llgo_main.N, align 8
+  %94 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 0)
+  store %main.N zeroinitializer, ptr %94, align 1
+  %95 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %96 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %95, i32 0, i32 0
+  store ptr %93, ptr %96, align 8
+  %97 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %95, i32 0, i32 1
+  store ptr %94, ptr %97, align 8
+  %98 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %95, align 8
+  %99 = call i1 @"github.com/goplus/llgo/internal/runtime.EfaceEqual"(%"github.com/goplus/llgo/internal/runtime.eface" %13, %"github.com/goplus/llgo/internal/runtime.eface" %98)
+  %100 = xor i1 %99, true
+  call void @main.assert(i1 %100)
+  %101 = load %main.T, ptr %40, align 8
+  %102 = load ptr, ptr @_llgo_main.T, align 8
+  %103 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 48)
+  store %main.T %101, ptr %103, align 8
+  %104 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %105 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %104, i32 0, i32 0
+  store ptr %102, ptr %105, align 8
+  %106 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %104, i32 0, i32 1
+  store ptr %103, ptr %106, align 8
+  %107 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %104, align 8
+  %108 = call i1 @"github.com/goplus/llgo/internal/runtime.EfaceEqual"(%"github.com/goplus/llgo/internal/runtime.eface" %38, %"github.com/goplus/llgo/internal/runtime.eface" %107)
+  call void @main.assert(i1 %108)
+  %109 = load %main.T, ptr %58, align 8
+  %110 = load ptr, ptr @_llgo_main.T, align 8
+  %111 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 48)
+  store %main.T %109, ptr %111, align 8
+  %112 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
+  %113 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %112, i32 0, i32 0
+  store ptr %110, ptr %113, align 8
+  %114 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %112, i32 0, i32 1
+  store ptr %111, ptr %114, align 8
+  %115 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %112, align 8
+  %116 = call i1 @"github.com/goplus/llgo/internal/runtime.EfaceEqual"(%"github.com/goplus/llgo/internal/runtime.eface" %38, %"github.com/goplus/llgo/internal/runtime.eface" %115)
+  %117 = xor i1 %116, true
+  call void @main.assert(i1 %117)
+  ret void
+}
+
+define i32 @main(i32 %0, ptr %1) {
+_llgo_0:
+  store i32 %0, ptr @__llgo_argc, align 4
+  store ptr %1, ptr @__llgo_argv, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.init"()
+  call void @main.init()
+  ret i32 0
+}
+
+define void @main.test() {
+_llgo_0:
+  ret void
+}
+
+define void @"main.init$after"() {
+_llgo_0:
+  %0 = load ptr, ptr @_llgo_string, align 8
+  %1 = icmp eq ptr %0, null
+  br i1 %1, label %_llgo_1, label %_llgo_2
+
+_llgo_1:                                          ; preds = %_llgo_0
+  %2 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 24)
+  store ptr %2, ptr @_llgo_string, align 8
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  %3 = load ptr, ptr @_llgo_int, align 8
+  %4 = icmp eq ptr %3, null
+  br i1 %4, label %_llgo_3, label %_llgo_4
+
+_llgo_3:                                          ; preds = %_llgo_2
+  %5 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 2)
+  store ptr %5, ptr @_llgo_int, align 8
+  br label %_llgo_4
+
+_llgo_4:                                          ; preds = %_llgo_3, %_llgo_2
+  %6 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %5, i32 0, i32 6
+  %7 = load i8, ptr %6, align 1
+  %8 = or i8 %7, 32
+  store i8 %8, ptr %6, align 1
+  %9 = load ptr, ptr @"_llgo_struct$n1H8J_3prDN3firMwPxBLVTkE5hJ9Di-AqNvaC9jczw", align 8
+  %10 = icmp eq ptr %9, null
+  br i1 %10, label %_llgo_5, label %_llgo_6
+
+_llgo_5:                                          ; preds = %_llgo_4
+  %11 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %12 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %11, i32 0, i32 0
+  store ptr @3, ptr %12, align 8
+  %13 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %11, i32 0, i32 1
+  store i64 4, ptr %13, align 4
+  %14 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %11, align 8
+  %15 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 0)
+  %16 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
+  %17 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %16, i32 0, i32 0
+  store ptr %15, ptr %17, align 8
+  %18 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %16, i32 0, i32 1
+  store i64 0, ptr %18, align 4
+  %19 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %16, i32 0, i32 2
+  store i64 0, ptr %19, align 4
+  %20 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %16, align 8
+  %21 = call ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String" %14, i64 0, %"github.com/goplus/llgo/internal/runtime.Slice" %20)
+  store ptr %21, ptr @"_llgo_struct$n1H8J_3prDN3firMwPxBLVTkE5hJ9Di-AqNvaC9jczw", align 8
+  br label %_llgo_6
+
+_llgo_6:                                          ; preds = %_llgo_5, %_llgo_4
+  %22 = load ptr, ptr @_llgo_main.T, align 8
+  %23 = icmp eq ptr %22, null
+  br i1 %23, label %_llgo_7, label %_llgo_8
+
+_llgo_7:                                          ; preds = %_llgo_6
+  %24 = call ptr @"github.com/goplus/llgo/internal/runtime.NewNamed"(i64 25, i64 0, i64 0)
+  store ptr %24, ptr @_llgo_main.T, align 8
+  br label %_llgo_8
+
+_llgo_8:                                          ; preds = %_llgo_7, %_llgo_6
+  %25 = load ptr, ptr @_llgo_int, align 8
+  %26 = load ptr, ptr @_llgo_int, align 8
+  %27 = load ptr, ptr @_llgo_string, align 8
+  %28 = load ptr, ptr @_llgo_any, align 8
+  %29 = icmp eq ptr %28, null
+  br i1 %29, label %_llgo_9, label %_llgo_10
+
+_llgo_9:                                          ; preds = %_llgo_8
+  %30 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 0)
+  %31 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
+  %32 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %31, i32 0, i32 0
+  store ptr %30, ptr %32, align 8
+  %33 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %31, i32 0, i32 1
+  store i64 0, ptr %33, align 4
+  %34 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %31, i32 0, i32 2
+  store i64 0, ptr %34, align 4
+  %35 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %31, align 8
+  %36 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %37 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %36, i32 0, i32 0
+  store ptr @3, ptr %37, align 8
+  %38 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %36, i32 0, i32 1
+  store i64 4, ptr %38, align 4
+  %39 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %36, align 8
+  %40 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %41 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %40, i32 0, i32 0
+  store ptr null, ptr %41, align 8
+  %42 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %40, i32 0, i32 1
+  store i64 0, ptr %42, align 4
+  %43 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %40, align 8
+  %44 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" %39, %"github.com/goplus/llgo/internal/runtime.String" %43, %"github.com/goplus/llgo/internal/runtime.Slice" %35)
+  store ptr %44, ptr @_llgo_any, align 8
+  br label %_llgo_10
+
+_llgo_10:                                         ; preds = %_llgo_9, %_llgo_8
+  %45 = load ptr, ptr @_llgo_any, align 8
+  %46 = load ptr, ptr @"_llgo_struct$5D_KhR3tDEp-wpx9caTiVZca43wS-XW6slE9Bsr8rsk", align 8
+  %47 = icmp eq ptr %46, null
+  br i1 %47, label %_llgo_11, label %_llgo_12
+
+_llgo_11:                                         ; preds = %_llgo_10
+  %48 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %49 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %48, i32 0, i32 0
+  store ptr @4, ptr %49, align 8
+  %50 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %48, i32 0, i32 1
+  store i64 1, ptr %50, align 4
+  %51 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %48, align 8
+  %52 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %53 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %52, i32 0, i32 0
+  store ptr null, ptr %53, align 8
+  %54 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %52, i32 0, i32 1
+  store i64 0, ptr %54, align 4
+  %55 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %52, align 8
+  %56 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %51, ptr %25, i64 0, %"github.com/goplus/llgo/internal/runtime.String" %55, i1 false)
+  %57 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %58 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %57, i32 0, i32 0
+  store ptr @5, ptr %58, align 8
+  %59 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %57, i32 0, i32 1
+  store i64 1, ptr %59, align 4
+  %60 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %57, align 8
+  %61 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %62 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %61, i32 0, i32 0
+  store ptr null, ptr %62, align 8
+  %63 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %61, i32 0, i32 1
+  store i64 0, ptr %63, align 4
+  %64 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %61, align 8
+  %65 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %60, ptr %26, i64 8, %"github.com/goplus/llgo/internal/runtime.String" %64, i1 false)
+  %66 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %67 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %66, i32 0, i32 0
+  store ptr @6, ptr %67, align 8
+  %68 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %66, i32 0, i32 1
+  store i64 1, ptr %68, align 4
+  %69 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %66, align 8
+  %70 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %71 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %70, i32 0, i32 0
+  store ptr null, ptr %71, align 8
+  %72 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %70, i32 0, i32 1
+  store i64 0, ptr %72, align 4
+  %73 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %70, align 8
+  %74 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %69, ptr %27, i64 16, %"github.com/goplus/llgo/internal/runtime.String" %73, i1 false)
+  %75 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %76 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %75, i32 0, i32 0
+  store ptr @7, ptr %76, align 8
+  %77 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %75, i32 0, i32 1
+  store i64 1, ptr %77, align 4
+  %78 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %75, align 8
+  %79 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %80 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %79, i32 0, i32 0
+  store ptr null, ptr %80, align 8
+  %81 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %79, i32 0, i32 1
+  store i64 0, ptr %81, align 4
+  %82 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %79, align 8
+  %83 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %78, ptr %45, i64 32, %"github.com/goplus/llgo/internal/runtime.String" %82, i1 false)
+  %84 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %85 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %84, i32 0, i32 0
+  store ptr @3, ptr %85, align 8
+  %86 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %84, i32 0, i32 1
+  store i64 4, ptr %86, align 4
+  %87 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %84, align 8
+  %88 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 224)
+  %89 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %88, i64 0
+  store %"github.com/goplus/llgo/internal/abi.StructField" %56, ptr %89, align 8
+  %90 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %88, i64 1
+  store %"github.com/goplus/llgo/internal/abi.StructField" %65, ptr %90, align 8
+  %91 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %88, i64 2
+  store %"github.com/goplus/llgo/internal/abi.StructField" %74, ptr %91, align 8
+  %92 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %88, i64 3
+  store %"github.com/goplus/llgo/internal/abi.StructField" %83, ptr %92, align 8
+  %93 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
+  %94 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %93, i32 0, i32 0
+  store ptr %88, ptr %94, align 8
+  %95 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %93, i32 0, i32 1
+  store i64 4, ptr %95, align 4
+  %96 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %93, i32 0, i32 2
+  store i64 4, ptr %96, align 4
+  %97 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %93, align 8
+  %98 = call ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String" %87, i64 48, %"github.com/goplus/llgo/internal/runtime.Slice" %97)
+  store ptr %98, ptr @"_llgo_struct$5D_KhR3tDEp-wpx9caTiVZca43wS-XW6slE9Bsr8rsk", align 8
+  br label %_llgo_12
+
+_llgo_12:                                         ; preds = %_llgo_11, %_llgo_10
+  %99 = load ptr, ptr @"_llgo_struct$5D_KhR3tDEp-wpx9caTiVZca43wS-XW6slE9Bsr8rsk", align 8
+  br i1 %23, label %_llgo_13, label %_llgo_14
+
+_llgo_13:                                         ; preds = %_llgo_12
+  %100 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %101 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %100, i32 0, i32 0
+  store ptr @3, ptr %101, align 8
+  %102 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %100, i32 0, i32 1
+  store i64 4, ptr %102, align 4
+  %103 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %100, align 8
+  %104 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %105 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %104, i32 0, i32 0
+  store ptr @8, ptr %105, align 8
+  %106 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %104, i32 0, i32 1
+  store i64 6, ptr %106, align 4
+  %107 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %104, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.InitNamed"(ptr %24, %"github.com/goplus/llgo/internal/runtime.String" %103, %"github.com/goplus/llgo/internal/runtime.String" %107, ptr %99, { ptr, i64, i64 } zeroinitializer, { ptr, i64, i64 } zeroinitializer)
+  br label %_llgo_14
+
+_llgo_14:                                         ; preds = %_llgo_13, %_llgo_12
+  %108 = load ptr, ptr @_llgo_main.N, align 8
+  %109 = icmp eq ptr %108, null
+  br i1 %109, label %_llgo_15, label %_llgo_16
+
+_llgo_15:                                         ; preds = %_llgo_14
+  %110 = call ptr @"github.com/goplus/llgo/internal/runtime.NewNamed"(i64 25, i64 0, i64 0)
+  store ptr %110, ptr @_llgo_main.N, align 8
+  br label %_llgo_16
+
+_llgo_16:                                         ; preds = %_llgo_15, %_llgo_14
+  %111 = load ptr, ptr @"_llgo_struct$n1H8J_3prDN3firMwPxBLVTkE5hJ9Di-AqNvaC9jczw", align 8
+  br i1 %109, label %_llgo_17, label %_llgo_18
+
+_llgo_17:                                         ; preds = %_llgo_16
+  %112 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %113 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %112, i32 0, i32 0
+  store ptr @3, ptr %113, align 8
+  %114 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %112, i32 0, i32 1
+  store i64 4, ptr %114, align 4
+  %115 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %112, align 8
+  %116 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %117 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %116, i32 0, i32 0
+  store ptr @9, ptr %117, align 8
+  %118 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %116, i32 0, i32 1
+  store i64 6, ptr %118, align 4
+  %119 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %116, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.InitNamed"(ptr %110, %"github.com/goplus/llgo/internal/runtime.String" %115, %"github.com/goplus/llgo/internal/runtime.String" %119, ptr %111, { ptr, i64, i64 } zeroinitializer, { ptr, i64, i64 } zeroinitializer)
+  br label %_llgo_18
+
+_llgo_18:                                         ; preds = %_llgo_17, %_llgo_16
+  ret void
+}
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64)
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64)
+
+declare void @"github.com/goplus/llgo/internal/runtime.Panic"(%"github.com/goplus/llgo/internal/runtime.eface")
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64)
+
+define void @"main.init#1$2"(ptr %0) {
+_llgo_0:
+  %1 = load { ptr }, ptr %0, align 8
+  %2 = extractvalue { ptr } %1, 0
+  %3 = load i64, ptr %2, align 4
+  call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %3)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
+  ret void
+}
+
+define i64 @"main.init#1$1"(i64 %0, i64 %1) {
+_llgo_0:
+  %2 = add i64 %0, %1
+  ret i64 %2
+}
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.Zeroinit"(ptr, i64)
+
+declare i1 @"github.com/goplus/llgo/internal/runtime.StringEqual"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String")
+
+declare i1 @"github.com/goplus/llgo/internal/runtime.EfaceEqual"(%"github.com/goplus/llgo/internal/runtime.eface", %"github.com/goplus/llgo/internal/runtime.eface")
+
+declare %"github.com/goplus/llgo/internal/runtime.Slice" @"github.com/goplus/llgo/internal/runtime.NewSlice3"(ptr, i64, i64, i64, i64, i64)
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String", i64, %"github.com/goplus/llgo/internal/runtime.Slice")
+
+declare %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String", ptr, i64, %"github.com/goplus/llgo/internal/runtime.String", i1)
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.NewNamed"(i64, i64, i64)
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+
+declare void @"github.com/goplus/llgo/internal/runtime.InitNamed"(ptr, %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", ptr, %"github.com/goplus/llgo/internal/runtime.Slice", %"github.com/goplus/llgo/internal/runtime.Slice")
+
+declare void @"github.com/goplus/llgo/internal/runtime.init"()
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64)
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8)

cl/_testgo/errors/in.go

@@ -0,0 +1,22 @@
+package main
+
+// New returns an error that formats as the given text.
+// Each call to New returns a distinct error value even if the text is identical.
+func New(text string) error {
+	return &errorString{text}
+}
+
+// errorString is a trivial implementation of error.
+type errorString struct {
+	s string
+}
+
+func (e *errorString) Error() string {
+	return e.s
+}
+
+func main() {
+	err := New("an error")
+	println(err)
+	println(err.Error())
+}

cl/_testgo/errors/out.ll

@@ -0,0 +1,300 @@
+; ModuleID = 'main'
+source_filename = "main"
+
+%"github.com/goplus/llgo/internal/runtime.iface" = type { ptr, ptr }
+%"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 }
+%main.errorString = type { %"github.com/goplus/llgo/internal/runtime.String" }
+%"github.com/goplus/llgo/internal/abi.StructField" = type { %"github.com/goplus/llgo/internal/runtime.String", ptr, i64, %"github.com/goplus/llgo/internal/runtime.String", i1 }
+%"github.com/goplus/llgo/internal/runtime.Slice" = type { ptr, i64, i64 }
+%"github.com/goplus/llgo/internal/abi.Method" = type { %"github.com/goplus/llgo/internal/runtime.String", ptr, ptr, ptr }
+%"github.com/goplus/llgo/internal/abi.Imethod" = type { %"github.com/goplus/llgo/internal/runtime.String", ptr }
+
+@"main.init$guard" = global i1 false, align 1
+@"*_llgo_main.errorString" = global ptr null, align 8
+@_llgo_main.errorString = global ptr null, align 8
+@"main.struct$QTufDJA9wEDzuzgkA-ZSrLqW-B6lWN8O25mTSglAoLQ" = global ptr null, align 8
+@_llgo_string = linkonce global ptr null, align 8
+@0 = private unnamed_addr constant [1 x i8] c"s", align 1
+@1 = private unnamed_addr constant [4 x i8] c"main", align 1
+@2 = private unnamed_addr constant [5 x i8] c"Error", align 1
+@"_llgo_func$zNDVRsWTIpUPKouNUS805RGX--IV9qVK8B31IZbg5to" = linkonce global ptr null, align 8
+@3 = private unnamed_addr constant [16 x i8] c"main.errorString", align 1
+@"_llgo_iface$Fh8eUJ-Gw4e6TYuajcFIOSCuqSPKAt5nS4ow7xeGXEU" = linkonce global ptr null, align 8
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
+@4 = private unnamed_addr constant [8 x i8] c"an error", align 1
+
+define %"github.com/goplus/llgo/internal/runtime.iface" @main.New(%"github.com/goplus/llgo/internal/runtime.String" %0) {
+_llgo_0:
+  %1 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 16)
+  %2 = getelementptr inbounds %main.errorString, ptr %1, i32 0, i32 0
+  store %"github.com/goplus/llgo/internal/runtime.String" %0, ptr %2, align 8
+  %3 = load ptr, ptr @"*_llgo_main.errorString", align 8
+  %4 = load ptr, ptr @"_llgo_iface$Fh8eUJ-Gw4e6TYuajcFIOSCuqSPKAt5nS4ow7xeGXEU", align 8
+  %5 = call ptr @"github.com/goplus/llgo/internal/runtime.NewItab"(ptr %4, ptr %3)
+  %6 = alloca %"github.com/goplus/llgo/internal/runtime.iface", align 8
+  %7 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.iface", ptr %6, i32 0, i32 0
+  store ptr %5, ptr %7, align 8
+  %8 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.iface", ptr %6, i32 0, i32 1
+  store ptr %1, ptr %8, align 8
+  %9 = load %"github.com/goplus/llgo/internal/runtime.iface", ptr %6, align 8
+  ret %"github.com/goplus/llgo/internal/runtime.iface" %9
+}
+
+define %"github.com/goplus/llgo/internal/runtime.String" @"main.(*errorString).Error"(ptr %0) {
+_llgo_0:
+  %1 = getelementptr inbounds %main.errorString, ptr %0, i32 0, i32 0
+  %2 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %1, align 8
+  ret %"github.com/goplus/llgo/internal/runtime.String" %2
+}
+
+define void @main.init() {
+_llgo_0:
+  %0 = load i1, ptr @"main.init$guard", align 1
+  br i1 %0, label %_llgo_2, label %_llgo_1
+
+_llgo_1:                                          ; preds = %_llgo_0
+  store i1 true, ptr @"main.init$guard", align 1
+  call void @"main.init$after"()
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  ret void
+}
+
+define i32 @main(i32 %0, ptr %1) {
+_llgo_0:
+  store i32 %0, ptr @__llgo_argc, align 4
+  store ptr %1, ptr @__llgo_argv, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.init"()
+  call void @main.init()
+  %2 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %3 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %2, i32 0, i32 0
+  store ptr @4, ptr %3, align 8
+  %4 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %2, i32 0, i32 1
+  store i64 8, ptr %4, align 4
+  %5 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %2, align 8
+  %6 = call %"github.com/goplus/llgo/internal/runtime.iface" @main.New(%"github.com/goplus/llgo/internal/runtime.String" %5)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintIface"(%"github.com/goplus/llgo/internal/runtime.iface" %6)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
+  %7 = call ptr @"github.com/goplus/llgo/internal/runtime.IfacePtrData"(%"github.com/goplus/llgo/internal/runtime.iface" %6)
+  %8 = extractvalue %"github.com/goplus/llgo/internal/runtime.iface" %6, 0
+  %9 = getelementptr ptr, ptr %8, i64 3
+  %10 = load ptr, ptr %9, align 8
+  %11 = alloca { ptr, ptr }, align 8
+  %12 = getelementptr inbounds { ptr, ptr }, ptr %11, i32 0, i32 0
+  store ptr %10, ptr %12, align 8
+  %13 = getelementptr inbounds { ptr, ptr }, ptr %11, i32 0, i32 1
+  store ptr %7, ptr %13, align 8
+  %14 = load { ptr, ptr }, ptr %11, align 8
+  %15 = extractvalue { ptr, ptr } %14, 1
+  %16 = extractvalue { ptr, ptr } %14, 0
+  %17 = call %"github.com/goplus/llgo/internal/runtime.String" %16(ptr %15)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %17)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
+  ret i32 0
+}
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64)
+
+define void @"main.init$after"() {
+_llgo_0:
+  %0 = call ptr @"github.com/goplus/llgo/internal/runtime.NewNamed"(i64 25, i64 0, i64 1)
+  store ptr %0, ptr @_llgo_main.errorString, align 8
+  %1 = load ptr, ptr @_llgo_string, align 8
+  %2 = icmp eq ptr %1, null
+  br i1 %2, label %_llgo_1, label %_llgo_2
+
+_llgo_1:                                          ; preds = %_llgo_0
+  %3 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 24)
+  store ptr %3, ptr @_llgo_string, align 8
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  %4 = load ptr, ptr @_llgo_string, align 8
+  %5 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %6 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %5, i32 0, i32 0
+  store ptr @0, ptr %6, align 8
+  %7 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %5, i32 0, i32 1
+  store i64 1, ptr %7, align 4
+  %8 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %5, align 8
+  %9 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %10 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %9, i32 0, i32 0
+  store ptr null, ptr %10, align 8
+  %11 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %9, i32 0, i32 1
+  store i64 0, ptr %11, align 4
+  %12 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %9, align 8
+  %13 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %8, ptr %4, i64 0, %"github.com/goplus/llgo/internal/runtime.String" %12, i1 false)
+  %14 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %15 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %14, i32 0, i32 0
+  store ptr @1, ptr %15, align 8
+  %16 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %14, i32 0, i32 1
+  store i64 4, ptr %16, align 4
+  %17 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %14, align 8
+  %18 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 56)
+  %19 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %18, i64 0
+  store %"github.com/goplus/llgo/internal/abi.StructField" %13, ptr %19, align 8
+  %20 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
+  %21 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %20, i32 0, i32 0
+  store ptr %18, ptr %21, align 8
+  %22 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %20, i32 0, i32 1
+  store i64 1, ptr %22, align 4
+  %23 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %20, i32 0, i32 2
+  store i64 1, ptr %23, align 4
+  %24 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %20, align 8
+  %25 = call ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String" %17, i64 16, %"github.com/goplus/llgo/internal/runtime.Slice" %24)
+  store ptr %25, ptr @"main.struct$QTufDJA9wEDzuzgkA-ZSrLqW-B6lWN8O25mTSglAoLQ", align 8
+  %26 = load ptr, ptr @"main.struct$QTufDJA9wEDzuzgkA-ZSrLqW-B6lWN8O25mTSglAoLQ", align 8
+  %27 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %28 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %27, i32 0, i32 0
+  store ptr @2, ptr %28, align 8
+  %29 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %27, i32 0, i32 1
+  store i64 5, ptr %29, align 4
+  %30 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %27, align 8
+  %31 = load ptr, ptr @_llgo_string, align 8
+  %32 = load ptr, ptr @"_llgo_func$zNDVRsWTIpUPKouNUS805RGX--IV9qVK8B31IZbg5to", align 8
+  %33 = icmp eq ptr %32, null
+  br i1 %33, label %_llgo_3, label %_llgo_4
+
+_llgo_3:                                          ; preds = %_llgo_2
+  %34 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 0)
+  %35 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
+  %36 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %35, i32 0, i32 0
+  store ptr %34, ptr %36, align 8
+  %37 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %35, i32 0, i32 1
+  store i64 0, ptr %37, align 4
+  %38 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %35, i32 0, i32 2
+  store i64 0, ptr %38, align 4
+  %39 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %35, align 8
+  %40 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 8)
+  %41 = getelementptr ptr, ptr %40, i64 0
+  store ptr %31, ptr %41, align 8
+  %42 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
+  %43 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %42, i32 0, i32 0
+  store ptr %40, ptr %43, align 8
+  %44 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %42, i32 0, i32 1
+  store i64 1, ptr %44, align 4
+  %45 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %42, i32 0, i32 2
+  store i64 1, ptr %45, align 4
+  %46 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %42, align 8
+  %47 = call ptr @"github.com/goplus/llgo/internal/runtime.Func"(%"github.com/goplus/llgo/internal/runtime.Slice" %39, %"github.com/goplus/llgo/internal/runtime.Slice" %46, i1 false)
+  store ptr %47, ptr @"_llgo_func$zNDVRsWTIpUPKouNUS805RGX--IV9qVK8B31IZbg5to", align 8
+  br label %_llgo_4
+
+_llgo_4:                                          ; preds = %_llgo_3, %_llgo_2
+  %48 = load ptr, ptr @"_llgo_func$zNDVRsWTIpUPKouNUS805RGX--IV9qVK8B31IZbg5to", align 8
+  %49 = alloca %"github.com/goplus/llgo/internal/abi.Method", align 8
+  %50 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Method", ptr %49, i32 0, i32 0
+  store %"github.com/goplus/llgo/internal/runtime.String" %30, ptr %50, align 8
+  %51 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Method", ptr %49, i32 0, i32 1
+  store ptr %48, ptr %51, align 8
+  %52 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Method", ptr %49, i32 0, i32 2
+  store ptr @"main.(*errorString).Error", ptr %52, align 8
+  %53 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Method", ptr %49, i32 0, i32 3
+  store ptr @"main.(*errorString).Error", ptr %53, align 8
+  %54 = load %"github.com/goplus/llgo/internal/abi.Method", ptr %49, align 8
+  %55 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 40)
+  %56 = getelementptr %"github.com/goplus/llgo/internal/abi.Method", ptr %55, i64 0
+  store %"github.com/goplus/llgo/internal/abi.Method" %54, ptr %56, align 8
+  %57 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
+  %58 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %57, i32 0, i32 0
+  store ptr %55, ptr %58, align 8
+  %59 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %57, i32 0, i32 1
+  store i64 1, ptr %59, align 4
+  %60 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %57, i32 0, i32 2
+  store i64 1, ptr %60, align 4
+  %61 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %57, align 8
+  %62 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %63 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %62, i32 0, i32 0
+  store ptr @1, ptr %63, align 8
+  %64 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %62, i32 0, i32 1
+  store i64 4, ptr %64, align 4
+  %65 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %62, align 8
+  %66 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %67 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %66, i32 0, i32 0
+  store ptr @3, ptr %67, align 8
+  %68 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %66, i32 0, i32 1
+  store i64 16, ptr %68, align 4
+  %69 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %66, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.InitNamed"(ptr %0, %"github.com/goplus/llgo/internal/runtime.String" %65, %"github.com/goplus/llgo/internal/runtime.String" %69, ptr %26, { ptr, i64, i64 } zeroinitializer, %"github.com/goplus/llgo/internal/runtime.Slice" %61)
+  %70 = load ptr, ptr @_llgo_main.errorString, align 8
+  %71 = call ptr @"github.com/goplus/llgo/internal/runtime.PointerTo"(ptr %70)
+  store ptr %71, ptr @"*_llgo_main.errorString", align 8
+  %72 = load ptr, ptr @"_llgo_func$zNDVRsWTIpUPKouNUS805RGX--IV9qVK8B31IZbg5to", align 8
+  %73 = load ptr, ptr @"_llgo_iface$Fh8eUJ-Gw4e6TYuajcFIOSCuqSPKAt5nS4ow7xeGXEU", align 8
+  %74 = icmp eq ptr %73, null
+  br i1 %74, label %_llgo_5, label %_llgo_6
+
+_llgo_5:                                          ; preds = %_llgo_4
+  %75 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %76 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %75, i32 0, i32 0
+  store ptr @2, ptr %76, align 8
+  %77 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %75, i32 0, i32 1
+  store i64 5, ptr %77, align 4
+  %78 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %75, align 8
+  %79 = alloca %"github.com/goplus/llgo/internal/abi.Imethod", align 8
+  %80 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Imethod", ptr %79, i32 0, i32 0
+  store %"github.com/goplus/llgo/internal/runtime.String" %78, ptr %80, align 8
+  %81 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Imethod", ptr %79, i32 0, i32 1
+  store ptr %72, ptr %81, align 8
+  %82 = load %"github.com/goplus/llgo/internal/abi.Imethod", ptr %79, align 8
+  %83 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 24)
+  %84 = getelementptr %"github.com/goplus/llgo/internal/abi.Imethod", ptr %83, i64 0
+  store %"github.com/goplus/llgo/internal/abi.Imethod" %82, ptr %84, align 8
+  %85 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
+  %86 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %85, i32 0, i32 0
+  store ptr %83, ptr %86, align 8
+  %87 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %85, i32 0, i32 1
+  store i64 1, ptr %87, align 4
+  %88 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %85, i32 0, i32 2
+  store i64 1, ptr %88, align 4
+  %89 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %85, align 8
+  %90 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %91 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %90, i32 0, i32 0
+  store ptr @1, ptr %91, align 8
+  %92 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %90, i32 0, i32 1
+  store i64 4, ptr %92, align 4
+  %93 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %90, align 8
+  %94 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %95 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %94, i32 0, i32 0
+  store ptr null, ptr %95, align 8
+  %96 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %94, i32 0, i32 1
+  store i64 0, ptr %96, align 4
+  %97 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %94, align 8
+  %98 = call ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String" %93, %"github.com/goplus/llgo/internal/runtime.String" %97, %"github.com/goplus/llgo/internal/runtime.Slice" %89)
+  store ptr %98, ptr @"_llgo_iface$Fh8eUJ-Gw4e6TYuajcFIOSCuqSPKAt5nS4ow7xeGXEU", align 8
+  br label %_llgo_6
+
+_llgo_6:                                          ; preds = %_llgo_5, %_llgo_4
+  ret void
+}
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.NewNamed"(i64, i64, i64)
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64)
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String", i64, %"github.com/goplus/llgo/internal/runtime.Slice")
+
+declare %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String", ptr, i64, %"github.com/goplus/llgo/internal/runtime.String", i1)
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64)
+
+declare void @"github.com/goplus/llgo/internal/runtime.InitNamed"(ptr, %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", ptr, %"github.com/goplus/llgo/internal/runtime.Slice", %"github.com/goplus/llgo/internal/runtime.Slice")
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.Func"(%"github.com/goplus/llgo/internal/runtime.Slice", %"github.com/goplus/llgo/internal/runtime.Slice", i1)
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.PointerTo"(ptr)
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.Interface"(%"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.String", %"github.com/goplus/llgo/internal/runtime.Slice")
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.NewItab"(ptr, ptr)
+
+declare void @"github.com/goplus/llgo/internal/runtime.init"()
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintIface"(%"github.com/goplus/llgo/internal/runtime.iface")
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8)
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.IfacePtrData"(%"github.com/goplus/llgo/internal/runtime.iface")
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String")

cl/_testgo/goroutine/in.go

@@ -0,0 +1,12 @@
+package main
+
+func main() {
+	done := false
+	go func(s string) {
+		println(s)
+		done = true
+	}("Hello, goroutine")
+	for !done {
+		print(".")
+	}
+}

cl/_testgo/goroutine/out.ll

@@ -0,0 +1,111 @@
+; ModuleID = 'main'
+source_filename = "main"
+
+%"github.com/goplus/llgo/internal/runtime.String" = type { ptr, i64 }
+
+@"main.init$guard" = global i1 false, align 1
+@__llgo_argc = global i32 0, align 4
+@__llgo_argv = global ptr null, align 8
+@0 = private unnamed_addr constant [16 x i8] c"Hello, goroutine", align 1
+@1 = private unnamed_addr constant [1 x i8] c".", align 1
+
+define void @main.init() {
+_llgo_0:
+  %0 = load i1, ptr @"main.init$guard", align 1
+  br i1 %0, label %_llgo_2, label %_llgo_1
+
+_llgo_1:                                          ; preds = %_llgo_0
+  store i1 true, ptr @"main.init$guard", align 1
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  ret void
+}
+
+define i32 @main(i32 %0, ptr %1) {
+_llgo_0:
+  store i32 %0, ptr @__llgo_argc, align 4
+  store ptr %1, ptr @__llgo_argv, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.init"()
+  call void @main.init()
+  %2 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 1)
+  store i1 false, ptr %2, align 1
+  %3 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 8)
+  %4 = getelementptr inbounds { ptr }, ptr %3, i32 0, i32 0
+  store ptr %2, ptr %4, align 8
+  %5 = alloca { ptr, ptr }, align 8
+  %6 = getelementptr inbounds { ptr, ptr }, ptr %5, i32 0, i32 0
+  store ptr @"main.main$1", ptr %6, align 8
+  %7 = getelementptr inbounds { ptr, ptr }, ptr %5, i32 0, i32 1
+  store ptr %3, ptr %7, align 8
+  %8 = load { ptr, ptr }, ptr %5, align 8
+  %9 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %10 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %9, i32 0, i32 0
+  store ptr @0, ptr %10, align 8
+  %11 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %9, i32 0, i32 1
+  store i64 16, ptr %11, align 4
+  %12 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %9, align 8
+  %13 = call ptr @malloc(i64 32)
+  %14 = getelementptr inbounds { { ptr, ptr }, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %13, i32 0, i32 0
+  store { ptr, ptr } %8, ptr %14, align 8
+  %15 = getelementptr inbounds { { ptr, ptr }, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %13, i32 0, i32 1
+  store %"github.com/goplus/llgo/internal/runtime.String" %12, ptr %15, align 8
+  %16 = alloca i8, i64 8, align 1
+  %17 = call i32 @pthread_create(ptr %16, ptr null, ptr @"main._llgo_routine$1", ptr %13)
+  br label %_llgo_3
+
+_llgo_1:                                          ; preds = %_llgo_3
+  %18 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %19 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %18, i32 0, i32 0
+  store ptr @1, ptr %19, align 8
+  %20 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %18, i32 0, i32 1
+  store i64 1, ptr %20, align 4
+  %21 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %18, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %21)
+  br label %_llgo_3
+
+_llgo_2:                                          ; preds = %_llgo_3
+  ret i32 0
+
+_llgo_3:                                          ; preds = %_llgo_1, %_llgo_0
+  %22 = load i1, ptr %2, align 1
+  br i1 %22, label %_llgo_2, label %_llgo_1
+}
+
+declare void @"github.com/goplus/llgo/internal/runtime.init"()
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64)
+
+define void @"main.main$1"(ptr %0, %"github.com/goplus/llgo/internal/runtime.String" %1) {
+_llgo_0:
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %1)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
+  %2 = load { ptr }, ptr %0, align 8
+  %3 = extractvalue { ptr } %2, 0
+  store i1 true, ptr %3, align 1
+  ret void
+}
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64)
+
+declare ptr @malloc(i64)
+
+define ptr @"main._llgo_routine$1"(ptr %0) {
+_llgo_0:
+  %1 = load { { ptr, ptr }, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %0, align 8
+  %2 = extractvalue { { ptr, ptr }, %"github.com/goplus/llgo/internal/runtime.String" } %1, 0
+  %3 = extractvalue { { ptr, ptr }, %"github.com/goplus/llgo/internal/runtime.String" } %1, 1
+  %4 = extractvalue { ptr, ptr } %2, 1
+  %5 = extractvalue { ptr, ptr } %2, 0
+  call void %5(ptr %4, %"github.com/goplus/llgo/internal/runtime.String" %3)
+  call void @free(ptr %0)
+  ret ptr null
+}
+
+declare void @free(ptr)
+
+declare i32 @pthread_create(ptr, ptr, ptr, ptr)
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String")
+
+declare void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8)

cl/_testgo/ifaceconv/in.go

@@ -0,0 +1,85 @@
+package main
+
+// Tests of interface conversions and type assertions.
+
+type I0 interface {
+}
+type I1 interface {
+	f()
+}
+type I2 interface {
+	f()
+	g()
+}
+
+type C0 struct{}
+type C1 struct{}
+
+func (C1) f() {}
+
+type C2 struct{}
+
+func (C2) f() {}
+func (C2) g() {}
+
+func main() {
+	var i0 I0
+	var i1 I1
+	var i2 I2
+
+	// Nil always causes a type assertion to fail, even to the
+	// same type.
+	if _, ok := i0.(I0); ok {
+		panic("nil i0.(I0) succeeded")
+	}
+	if _, ok := i1.(I1); ok {
+		panic("nil i1.(I1) succeeded")
+	}
+	if _, ok := i2.(I2); ok {
+		panic("nil i2.(I2) succeeded")
+	}
+
+	// Conversions can't fail, even with nil.
+	_ = I0(i0)
+
+	_ = I0(i1)
+	_ = I1(i1)
+
+	_ = I0(i2)
+	_ = I1(i2)
+	_ = I2(i2)
+
+	// Non-nil type assertions pass or fail based on the concrete type.
+	i1 = C1{}
+	if _, ok := i1.(I0); !ok {
+		panic("C1 i1.(I0) failed")
+	}
+	if _, ok := i1.(I1); !ok {
+		panic("C1 i1.(I1) failed")
+	}
+	if _, ok := i1.(I2); ok {
+		panic("C1 i1.(I2) succeeded")
+	}
+
+	i1 = C2{}
+	if _, ok := i1.(I0); !ok {
+		panic("C2 i1.(I0) failed")
+	}
+	if _, ok := i1.(I1); !ok {
+		panic("C2 i1.(I1) failed")
+	}
+	if _, ok := i1.(I2); !ok {
+		panic("C2 i1.(I2) failed")
+	}
+
+	// Conversions can't fail.
+	i1 = C1{}
+	if I0(i1) == nil {
+		panic("C1 I0(i1) was nil")
+	}
+	if I1(i1) == nil {
+		panic("C1 I1(i1) was nil")
+	}
+
+	println("pass")
+}

cl/_testgo/ifaceprom/in.go

@@ -0,0 +1,60 @@
+package main
+
+// Test of promotion of methods of an interface embedded within a
+// struct.  In particular, this test exercises that the correct
+// method is called.
+
+type I interface {
+	one() int
+	two() string
+}
+
+type S struct {
+	I
+}
+
+type impl struct{}
+
+func (impl) one() int {
+	return 1
+}
+
+func (impl) two() string {
+	return "two"
+}
+
+func main() {
+	var s S
+	s.I = impl{}
+	if one := s.I.one(); one != 1 {
+		panic(one)
+	}
+	if one := s.one(); one != 1 {
+		panic(one)
+	}
+	closOne := s.I.one
+	if one := closOne(); one != 1 {
+		panic(one)
+	}
+	closOne = s.one
+	if one := closOne(); one != 1 {
+		panic(one)
+	}
+
+	if two := s.I.two(); two != "two" {
+		panic(two)
+	}
+	if two := s.two(); two != "two" {
+		panic(two)
+	}
+	closTwo := s.I.two
+	if two := closTwo(); two != "two" {
+		panic(two)
+	}
+	closTwo = s.two
+	if two := closTwo(); two != "two" {
+		panic(two)
+	}
+
+	println("pass")
+}