[PATCH] D142834: [X86][MC][bugfix] Report error for mismatched modifier in inline asm and remove function getX86SubSuperRegisterOrZero

[Kan Shengchen via Phabricator via llvm-commits]

skan added inline comments.


================
Comment at: llvm/test/CodeGen/X86/asm-reject-reg-type-mismatch.ll:4
 
-; CHECK: error: couldn't allocate output register for constraint '{ax}'
-define i128 @blup() {
----------------
craig.topper wrote:
> craig.topper wrote:
> > Is it not possible to do this with `__int128` in C?
> ```
> void foo() {
>     __int128 a;
>     asm volatile ("" : "+a"(a));
> }
> ```
> ```
> void foo() {
>     __int128 a;
>     asm volatile ("" : "+a"(a));
> }
> ```

Good example!


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D142834/new/

https://reviews.llvm.org/D142834