[llvm] r270375 - [x86, AVX] add test file to show vzeroupper pass excesses

[Quentin Colombet via llvm-commits]

> On May 22, 2016, at 12:55 PM, Sanjay Patel via llvm-commits <llvm-commits at lists.llvm.org> wrote:
> 
> Author: spatel
> Date: Sun May 22 14:55:48 2016
> New Revision: 270375
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=270375&view=rev
> Log:
> [x86, AVX] add test file to show vzeroupper pass excesses
> 
> Added:
>    llvm/trunk/test/CodeGen/X86/vzero-excess.ll
> 
> Added: llvm/trunk/test/CodeGen/X86/vzero-excess.ll
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/vzero-excess.ll?rev=270375&view=auto
> ==============================================================================
> --- llvm/trunk/test/CodeGen/X86/vzero-excess.ll (added)
> +++ llvm/trunk/test/CodeGen/X86/vzero-excess.ll Sun May 22 14:55:48 2016
> @@ -0,0 +1,43 @@
> +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
> +; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx | FileCheck %s
> +
> +; FIXME: The vzeroupper added by the VZeroUpperInserter pass is unnecessary in these tests.
> +
> +define <8 x float> @zeroupper(<8 x float> %x) nounwind {
> +; CHECK-LABEL: zeroupper:
> +; CHECK:       # BB#0:
> +; CHECK-NEXT:    subq $56, %rsp
> +; CHECK-NEXT:    vmovups %ymm0, (%rsp) # 32-byte Spill
> +; CHECK-NEXT:    vzeroupper
> +; CHECK-NEXT:    vzeroupper

Shouldn’t we use CHECK-NOT for the second vzeroupper and XFAIL the test for now.

> +; CHECK-NEXT:    callq the_unknown
> +; CHECK-NEXT:    vmovups (%rsp), %ymm0 # 32-byte Reload
> +; CHECK-NEXT:    addq $56, %rsp
> +; CHECK-NEXT:    retq
> +;
> +  call void @llvm.x86.avx.vzeroupper()
> +  call void @the_unknown()
> +  ret <8 x float> %x
> +}
> +
> +define <8 x float> @zeroall(<8 x float> %x) nounwind {
> +; CHECK-LABEL: zeroall:
> +; CHECK:       # BB#0:
> +; CHECK-NEXT:    subq $56, %rsp
> +; CHECK-NEXT:    vmovups %ymm0, (%rsp) # 32-byte Spill
> +; CHECK-NEXT:    vzeroall
> +; CHECK-NEXT:    vzeroupper
> +; CHECK-NEXT:    callq the_unknown
> +; CHECK-NEXT:    vmovups (%rsp), %ymm0 # 32-byte Reload
> +; CHECK-NEXT:    addq $56, %rsp
> +; CHECK-NEXT:    retq
> +;
> +  call void @llvm.x86.avx.vzeroall()
> +  call void @the_unknown()
> +  ret <8 x float> %x
> +}
> +
> +declare void @llvm.x86.avx.vzeroupper() nounwind readnone
> +declare void @llvm.x86.avx.vzeroall() nounwind readnone
> +declare void @the_unknown() nounwind
> +
> 
> 
> _______________________________________________
> llvm-commits mailing list
> llvm-commits at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits