test/CodeGen/writable-strings.c - clang - Git at Google

 // RUN: clang-cc -emit-llvm -o - -fwritable-strings %s

 int main() {
     char *str = "abc";
     str[0] = '1';
     printf("%s", str);
 }
	// RUN: clang-cc -emit-llvm -o - -fwritable-strings %s

	int main() {
	char *str = "abc";
	str[0] = '1';
	printf("%s", str);
	}