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[x86] preserve test intent by removing undef 

We need to clean up the DAG floating-point undef logic.
This process is similar to how we handled integer undef
logic in D43141. 

And as we did there, I'm trying to reduce the patch by 
changing tests that would probably become meaningless
once we make those fixes.

llvm-svn: 332499
This commit is contained in:
Sanjay Patel 2018-05-16 17:57:35 +00:00
parent 67aa726f8c
commit a7874a52c9
1 changed files with 2 additions and 2 deletions
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4
llvm/test/CodeGen/X86/pr36199.ll
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@ -1,7 +1,7 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=avx512f | FileCheck %s
define void @foo() unnamed_addr #0 {
define void @foo(<16 x float> %x) {
; CHECK-LABEL: foo:
; CHECK: # %bb.0:
; CHECK-NEXT: vaddps %zmm0, %zmm0, %zmm0
@ -10,7 +10,7 @@ define void @foo() unnamed_addr #0 {
; CHECK-NEXT: vmovups %zmm0, (%rax)
; CHECK-NEXT: vzeroupper
; CHECK-NEXT: retq
%1 = fadd <16 x float> undef, undef
%1 = fadd <16 x float> %x, %x
%bc256 = bitcast <16 x float> %1 to <4 x i128>
%2 = extractelement <4 x i128> %bc256, i32 0
%3 = bitcast i128 %2 to <4 x float>