cl: _testdata/printf: almost done

cl/_testdata/printf/in.go

@@ -0,0 +1,12 @@
+package main
+
+import _ "unsafe"
+
+//go:linkname printf _printf
+func printf(format *int8, __llgo_va_list ...any)
+
+var hello = [...]int8{'H', 'e', 'l', 'l', 'o', '\n', 0}
+
+func main() {
+	printf(&hello[0])
+}

cl/_testdata/printf/out.ll

@@ -0,0 +1,32 @@
+; ModuleID = 'main'
+source_filename = "main"
+
+@"init$guard" = global ptr null
+@hello = global ptr null
+
+define void @init() {
+_llgo_0:
+  %0 = load i1, ptr @"init$guard", align 1
+  br i1 %0, label %_llgo_2, label %_llgo_1
+
+_llgo_1:                                          ; preds = %_llgo_0
+  store i1 true, ptr @"init$guard", align 1
+  store i8 72, ptr @hello, align 1
+  store i8 101, ptr getelementptr inbounds (i8, ptr @hello, i64 1), align 1
+  store i8 108, ptr getelementptr inbounds (i8, ptr @hello, i64 2), align 1
+  store i8 108, ptr getelementptr inbounds (i8, ptr @hello, i64 3), align 1
+  store i8 111, ptr getelementptr inbounds (i8, ptr @hello, i64 4), align 1
+  store i8 10, ptr getelementptr inbounds (i8, ptr @hello, i64 5), align 1
+  store i8 0, ptr getelementptr inbounds (i8, ptr @hello, i64 6), align 1
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  ret void
+}
+
+declare void @printf(ptr, ...)
+
+define void @main() {
+_llgo_0:
+  ret void
+}