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[SLSR] S's basis must have the same type as S 

llvm-svn: 240910
This commit is contained in:
Jingyue Wu 2015-06-28 17:45:05 +00:00
parent 50a6f9157b
commit 3abde7bea5
2 changed files with 24 additions and 2 deletions
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6
llvm/lib/Transforms/Scalar/StraightLineStrengthReduce.cpp
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@ -224,11 +224,13 @@ FunctionPass *llvm::createStraightLineStrengthReducePass() {
bool StraightLineStrengthReduce::isBasisFor(const Candidate &Basis,
const Candidate &C) {
return (Basis.Ins != C.Ins && // skip the same instruction
// They must have the same type too. Basis.Base == C.Base doesn't
// guarantee their types are the same (PR23975).
Basis.Ins->getType() == C.Ins->getType() &&
// Basis must dominate C in order to rewrite C with respect to Basis.
DT->dominates(Basis.Ins->getParent(), C.Ins->getParent()) &&
// They share the same base, stride, and candidate kind.
Basis.Base == C.Base &&
Basis.Stride == C.Stride &&
Basis.Base == C.Base && Basis.Stride == C.Stride &&
Basis.CandidateKind == C.CandidateKind);
}

20
llvm/test/Transforms/StraightLineStrengthReduce/AMDGPU/pr23975.ll Normal file
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@ -0,0 +1,20 @@
; RUN: opt < %s -slsr -S | FileCheck %s
target datalayout = "e-p:32:32-p1:64:64-p2:64:64-p3:32:32-p4:64:64-p5:32:32-p24:64:64-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64"
target triple = "amdgcn--"
%struct.Matrix4x4 = type { [4 x [4 x float]] }
; Function Attrs: nounwind
define fastcc void @Accelerator_Intersect(%struct.Matrix4x4 addrspace(1)* nocapture readonly %leafTransformations) #0 {
; CHECK-LABEL: @Accelerator_Intersect(
entry:
%tmp = sext i32 undef to i64
%arrayidx114 = getelementptr inbounds %struct.Matrix4x4, %struct.Matrix4x4 addrspace(1)* %leafTransformations, i64 %tmp
%tmp1 = getelementptr %struct.Matrix4x4, %struct.Matrix4x4 addrspace(1)* %leafTransformations, i64 %tmp, i32 0, i64 0, i64 0
; CHECK: %tmp1 = getelementptr %struct.Matrix4x4, %struct.Matrix4x4 addrspace(1)* %leafTransformations, i64 %tmp, i32 0, i64 0, i64 0
%tmp2 = load <4 x float>, <4 x float> addrspace(1)* undef, align 4
ret void
}
attributes #0 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "target-cpu"="tahiti" "unsafe-fp-math"="false" "use-soft-float"="false" }