4a8e6ed2f7
This patch makes SLP and LV emit operations with initial vectors set to poison constant instead of undef. This is a part of efforts for using poison vector instead of undef to represent "doesn't care" vector. The goal is to make nice shufflevector optimizations valid that is currently incorrect due to the tricky interaction between undef and poison (see https://bugs.llvm.org/show_bug.cgi?id=44185 ). Reviewed By: fhahn Differential Revision: https://reviews.llvm.org/D94061
38 lines
1.9 KiB
LLVM
38 lines
1.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -basic-aa -slp-vectorizer -dce -S -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx | FileCheck %s
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; int foo(double * restrict A, double * restrict B, double G) {
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; A[0] = (B[10] ? G : 1);
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; A[1] = (B[11] ? G : 1);
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; }
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define i32 @foo(double* noalias nocapture %A, double* noalias nocapture %B, double %G) {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds double, double* [[B:%.*]], i64 10
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; CHECK-NEXT: [[TMP0:%.*]] = bitcast double* [[ARRAYIDX]] to <2 x double>*
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; CHECK-NEXT: [[TMP1:%.*]] = load <2 x double>, <2 x double>* [[TMP0]], align 8
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; CHECK-NEXT: [[TMP2:%.*]] = fcmp une <2 x double> [[TMP1]], zeroinitializer
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; CHECK-NEXT: [[TMP3:%.*]] = insertelement <2 x double> poison, double [[G:%.*]], i32 0
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; CHECK-NEXT: [[TMP4:%.*]] = insertelement <2 x double> [[TMP3]], double [[G]], i32 1
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; CHECK-NEXT: [[TMP5:%.*]] = select <2 x i1> [[TMP2]], <2 x double> [[TMP4]], <2 x double> <double 1.000000e+00, double 1.000000e+00>
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; CHECK-NEXT: [[TMP6:%.*]] = bitcast double* [[A:%.*]] to <2 x double>*
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; CHECK-NEXT: store <2 x double> [[TMP5]], <2 x double>* [[TMP6]], align 8
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; CHECK-NEXT: ret i32 undef
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;
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entry:
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%arrayidx = getelementptr inbounds double, double* %B, i64 10
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%0 = load double, double* %arrayidx, align 8
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%tobool = fcmp une double %0, 0.000000e+00
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%cond = select i1 %tobool, double %G, double 1.000000e+00
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store double %cond, double* %A, align 8
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%arrayidx2 = getelementptr inbounds double, double* %B, i64 11
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%1 = load double, double* %arrayidx2, align 8
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%tobool3 = fcmp une double %1, 0.000000e+00
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%cond7 = select i1 %tobool3, double %G, double 1.000000e+00
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%arrayidx8 = getelementptr inbounds double, double* %A, i64 1
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store double %cond7, double* %arrayidx8, align 8
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ret i32 undef
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}
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