[PATCH] D56571: [RFC prototype] Implementation of asm-goto support in clang

[Nick Desaulniers via Phabricator via cfe-commits]

nickdesaulniers marked an inline comment as done.
nickdesaulniers added inline comments.


================
Comment at: test/CodeGen/asm.c:276
+  return 1;
+}
----------------
nickdesaulniers wrote:
> I don't understand why, but this particular test case I cannot compile standalone without `-emit-llvm`.
> ```
> int t32(int cond) {
>   asm goto("testl %0, %0; jne %l1;" :: "r"(cond)::label_true, loop);
>   return 0;
> loop:
>   return 1;
> label_true:
>   return 2;
> }
> ```
> ```
> $ clang -target x86_64-linux-gnu -emit-llvm -c test.c
> $ clang -target x86_64-linux-gnu -c test.c 
> test.c:2:12: error: expected a symbol reference
>   asm goto("testl %0, %0; jne %l1;" :: "r"(cond)::label_true, loop);
>            ^
> <inline asm>:1:26: note: instantiated into assembly here
>         testl %edi, %edi; jne "";
>                                 ^
> 1 error generated.
> ```
> The produced assembly doesn't seem to contain the jump destination.  Am I doing something wrong?
ah, need `-no-integrated-as`.


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