[llvm] r240910 - [SLSR] S's basis must have the same type as S

[Jingyue Wu]

Author: jingyue
Date: Sun Jun 28 12:45:05 2015
New Revision: 240910

URL: http://llvm.org/viewvc/llvm-project?rev=240910&view=rev
Log:
[SLSR] S's basis must have the same type as S

Added:
    llvm/trunk/test/Transforms/StraightLineStrengthReduce/AMDGPU/pr23975.ll
Modified:
    llvm/trunk/lib/Transforms/Scalar/StraightLineStrengthReduce.cpp

Modified: llvm/trunk/lib/Transforms/Scalar/StraightLineStrengthReduce.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/StraightLineStrengthReduce.cpp?rev=240910&r1=240909&r2=240910&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/StraightLineStrengthReduce.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/StraightLineStrengthReduce.cpp Sun Jun 28 12:45:05 2015
@@ -224,11 +224,13 @@ FunctionPass *llvm::createStraightLineSt
 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);
 }
 

Added: llvm/trunk/test/Transforms/StraightLineStrengthReduce/AMDGPU/pr23975.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/StraightLineStrengthReduce/AMDGPU/pr23975.ll?rev=240910&view=auto
==============================================================================
--- llvm/trunk/test/Transforms/StraightLineStrengthReduce/AMDGPU/pr23975.ll (added)
+++ llvm/trunk/test/Transforms/StraightLineStrengthReduce/AMDGPU/pr23975.ll Sun Jun 28 12:45:05 2015
@@ -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" }