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[SLP][NFC]Add a test that reveals the problem in the emission of

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vector int division with undefs.
This commit is contained in:
Alexey Bataev 2021-11-22 07:41:07 -08:00
parent dc9b5550b2
commit 02298c15d5
1 changed files with 34 additions and 0 deletions
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llvm/test/Transforms/SLPVectorizer/X86/arith-div-undef.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -mtriple=x86_64-unknown -slp-vectorizer -instcombine -S -slp-threshold=-10000 | FileCheck %s
define <8 x i32> @sdiv_v8i32_undefs(<8 x i32> %a) {
; CHECK-LABEL: @sdiv_v8i32_undefs(
; CHECK-NEXT: ret <8 x i32> poison
;
%a0 = extractelement <8 x i32> %a, i32 0
%a1 = extractelement <8 x i32> %a, i32 1
%a2 = extractelement <8 x i32> %a, i32 2
%a3 = extractelement <8 x i32> %a, i32 3
%a4 = extractelement <8 x i32> %a, i32 4
%a5 = extractelement <8 x i32> %a, i32 5
%a6 = extractelement <8 x i32> %a, i32 6
%a7 = extractelement <8 x i32> %a, i32 7
%ab0 = sdiv i32 %a0, undef
%ab1 = sdiv i32 %a1, 4
%ab2 = sdiv i32 %a2, 8
%ab3 = sdiv i32 %a3, 16
%ab4 = sdiv i32 %a4, undef
%ab5 = sdiv i32 %a5, 4
%ab6 = sdiv i32 %a6, 8
%ab7 = sdiv i32 %a7, 16
%r0 = insertelement <8 x i32> poison, i32 %ab0, i32 0
%r1 = insertelement <8 x i32> %r0, i32 %ab1, i32 1
%r2 = insertelement <8 x i32> %r1, i32 %ab2, i32 2
%r3 = insertelement <8 x i32> %r2, i32 %ab3, i32 3
%r4 = insertelement <8 x i32> %r3, i32 %ab4, i32 4
%r5 = insertelement <8 x i32> %r4, i32 %ab5, i32 5
%r6 = insertelement <8 x i32> %r5, i32 %ab6, i32 6
%r7 = insertelement <8 x i32> %r6, i32 %ab7, i32 7
ret <8 x i32> %r7
}