diff --git a/_demo/cshademo/sha.go b/_demo/cshademo/sha.go
index ad58d8f8..37d2ad2b 100644
--- a/_demo/cshademo/sha.go
+++ b/_demo/cshademo/sha.go
@@ -8,22 +8,61 @@ import (
 )
 
 func main() {
+	str := "His money is twice tainted:"
 
 	var sha1 openssl.SHA_CTX
 	sha1.Init()
-	sha1.UpdateString("His money is twice tainted:")
-	sha1.UpdateString(" 'taint yours and 'taint mine.")
+	sha1.UpdateString(str)
 
-	h := make([]byte, openssl.SHA_DIGEST_LENGTH)
-	sha1.Final(unsafe.SliceData(h))
-	fmt.Printf("%x\n", h)
+	h1 := make([]byte, openssl.SHA_DIGEST_LENGTH)
+	sha1.Final(unsafe.SliceData(h1))
+	fmt.Printf("%x\n", h1)
+
+	h2 := make([]byte, openssl.SHA_DIGEST_LENGTH)
+	openssl.SHA1String(str, unsafe.SliceData(h2))
+	fmt.Printf("%x\n", h2)
 
 	var sha256 openssl.SHA256_CTX
 	sha256.Init()
-	sha256.UpdateString("His money is twice tainted:")
-	sha256.UpdateString(" 'taint yours and 'taint mine.")
+	sha256.UpdateString(str)
+	h3 := make([]byte, openssl.SHA256_DIGEST_LENGTH)
+	sha256.Final(unsafe.SliceData(h3))
+	fmt.Printf("%x\n", h3)
 
-	hh := make([]byte, openssl.SHA256_DIGEST_LENGTH)
-	sha256.Final(unsafe.SliceData(hh))
-	fmt.Printf("%x\n", hh)
+	h4 := make([]byte, openssl.SHA256_DIGEST_LENGTH)
+	openssl.SHA256String(str, unsafe.SliceData(h4))
+	fmt.Printf("%x\n", h4)
+
+	var sha512 openssl.SHA512_CTX
+	sha512.Init()
+	sha512.UpdateString("His money is twice tainted:")
+
+	h5 := make([]byte, openssl.SHA512_DIGEST_LENGTH)
+	sha512.Final(unsafe.SliceData(h5))
+	fmt.Printf("%x\n", h5)
+
+	h6 := make([]byte, openssl.SHA512_DIGEST_LENGTH)
+	openssl.SHA512String(str, unsafe.SliceData(h6))
+	fmt.Printf("%x\n", h6)
+
+	var sha224 openssl.SHA256_CTX
+	sha224.Init224()
+	sha224.Update224String(str)
+
+	h7 := make([]byte, openssl.SHA224_DIGEST_LENGTH)
+	sha224.Final224(unsafe.SliceData(h7))
+	fmt.Printf("%x\n", h7)
+	h8 := make([]byte, openssl.SHA224_DIGEST_LENGTH)
+	openssl.SHA224String(str, unsafe.SliceData(h8))
+	fmt.Printf("%x\n", h8)
+
+	var sha384 openssl.SHA512_CTX
+	sha384.Init384()
+	sha384.Update384String(str)
+	h9 := make([]byte, openssl.SHA384_DIGEST_LENGTH)
+	sha384.Final384(unsafe.SliceData(h9))
+	fmt.Printf("%x\n", h9)
+	h10 := make([]byte, openssl.SHA384_DIGEST_LENGTH)
+	openssl.SHA384String(str, unsafe.SliceData(h10))
+	fmt.Printf("%x\n", h10)
 }
diff --git a/c/openssl/sha1.go b/c/openssl/sha1.go
index 6ca7f6b2..96da515d 100644
--- a/c/openssl/sha1.go
+++ b/c/openssl/sha1.go
@@ -42,12 +42,8 @@ func (c *SHA_CTX) Final(md *byte) c.Int {
 
 // OSSL_DEPRECATEDIN_3_0 void SHA1_Transform(SHA_CTX *c, const unsigned char *data);
 //
-//go:linkname sha1Transform C.SHA1_Transform
-func sha1Transform(c *SHA_CTX, data *byte)
-
-func (c *SHA_CTX) Transform(data *byte) {
-	sha1Transform(c, data)
-}
+// llgo:link (*SHA_CTX).Transform C.SHA1_Transform
+func (c *SHA_CTX) Transform(data *byte) {}
 
 // unsigned char *SHA1(const unsigned char *d, size_t n, unsigned char *md);
 //
diff --git a/c/openssl/sha256.go b/c/openssl/sha256.go
index d18e3a2d..0c41ddc5 100644
--- a/c/openssl/sha256.go
+++ b/c/openssl/sha256.go
@@ -69,12 +69,8 @@ func (c *SHA256_CTX) Final(md *byte) c.Int {
 
 // OSSL_DEPRECATEDIN_3_0 void SHA256_Transform(SHA256_CTX *c, const unsigned char *data);
 //
-//go:linkname sha256Transform C.SHA256_Transform
-func sha256Transform(c *SHA256_CTX, data *byte)
-
-func (c *SHA256_CTX) Transform(data *byte) {
-	sha256Transform(c, data)
-}
+// llgo:link (*SHA256_CTX).Transform C.SHA256_Transform
+func (c *SHA256_CTX) Transform(data *byte) {}
 
 // unsigned char *SHA224(const unsigned char *d, size_t n, unsigned char *md);
 //
diff --git a/c/openssl/sha512.go b/c/openssl/sha512.go
index 6add73b7..1e5c5b5b 100644
--- a/c/openssl/sha512.go
+++ b/c/openssl/sha512.go
@@ -67,12 +67,8 @@ func (c *SHA512_CTX) Final(md *byte) c.Int {
 
 // OSSL_DEPRECATEDIN_3_0 void SHA512_Transform(SHA512_CTX *c, const unsigned char *data);
 //
-//go:linkname sha512Transform C.SHA512_Transform
-func sha512Transform(c *SHA512_CTX, data *byte)
-
-func (c *SHA512_CTX) Transform(data *byte) {
-	sha512Transform(c, data)
-}
+// llgo:link (*SHA512_CTX).Transform C.SHA512_Transform
+func (c *SHA512_CTX) Transform(data *byte) {}
 
 // unsigned char *SHA384(const unsigned char *d, size_t n, unsigned char *md);
 //
diff --git a/ssa/expr.go b/ssa/expr.go
index f9adbd7d..263ebb7a 100644
--- a/ssa/expr.go
+++ b/ssa/expr.go
@@ -1022,10 +1022,6 @@ func (b Builder) Do(da DoAction, fn Expr, args ...Expr) (ret Expr) {
 // Go spec (excluding "make" and "new").
 func (b Builder) BuiltinCall(fn string, args ...Expr) (ret Expr) {
 	switch fn {
-	case "max":
-		fallthrough
-	case "min":
-		return b.max(args...)
 	case "len":
 		if len(args) == 1 {
 			arg := args[0]
@@ -1132,12 +1128,6 @@ func (b Builder) BuiltinCall(fn string, args ...Expr) (ret Expr) {
 	panic("todo: " + fn)
 }
 
-// max return the max value for the args
-func (b Builder) max(args ...Expr) (ret Expr) {
-	//todo
-	return args[len(args)-1]
-}
-
 // Println prints the arguments to stderr, followed by a newline.
 func (b Builder) Println(args ...Expr) (ret Expr) {
 	return b.PrintEx(true, args...)