[PATCH] D17542: Disallow generating vzeroupper before return instruction (iret) in interrupt handler function

[Amjad Aboud via llvm-commits]

aaboud added a comment.

In http://reviews.llvm.org/D17542#364850, @ab wrote:

> Sorry to be a nag, but the testcase can be simplified even further:
>
>   ; RUN: llc -mtriple=x86_64-unknown-unknown -mattr=+avx < %s | FileCheck %s
>  
>   ; CHECK: vzeroupper
>   ; CHECK-NEXT: call
>   ; CHECK-NOT: vzeroupper
>   ; CHECK: iret
>  
>   define x86_intrcc void @foo(i8* %frame) {
>     call void @bar()
>     ret void
>   }
>  
>   declare void @bar()
>  
>
>
> FWIW, I also don't think the C reproducer adds any value, but if you think otherwise feel free to keep it!


OK, I modified the testcase and committed the patch.
Thanks for the review.


Repository:
  rL LLVM

http://reviews.llvm.org/D17542