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R600: Fix a rare bug where swizzle optimization returns wrong values

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llvm-svn: 185942
This commit is contained in:
Vincent Lejeune 2013-07-09 15:03:25 +00:00
parent 48ea85c102
commit 0c1224c533
2 changed files with 37 additions and 2 deletions
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5
lib/Target/R600/R600ISelLowering.cpp
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@ -1296,6 +1296,8 @@ static SDValue ReorganizeVector(SelectionDAG &DAG, SDValue VectorEntry,
VectorEntry.getOperand(3)
};
bool isUnmovable[4] = { false, false, false, false };
for (unsigned i = 0; i < 4; i++)
RemapSwizzle[i] = i;
for (unsigned i = 0; i < 4; i++) {
if (NewBldVec[i].getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
@ -1304,8 +1306,7 @@ static SDValue ReorganizeVector(SelectionDAG &DAG, SDValue VectorEntry,
if (!isUnmovable[Idx]) {
// Swap i and Idx
std::swap(NewBldVec[Idx], NewBldVec[i]);
RemapSwizzle[Idx] = i;
RemapSwizzle[i] = Idx;
std::swap(RemapSwizzle[RemapSwizzle[Idx]], RemapSwizzle[RemapSwizzle[i]]);
}
isUnmovable[Idx] = true;
}

34
test/CodeGen/R600/swizzle-export.ll
View File

@ -1,5 +1,6 @@
; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck --check-prefix=EG-CHECK %s
;EG-CHECK: @main
;EG-CHECK: EXPORT T{{[0-9]+}}.XYXX
;EG-CHECK: EXPORT T{{[0-9]+}}.ZXXX
;EG-CHECK: EXPORT T{{[0-9]+}}.XXWX
@ -91,10 +92,43 @@ main_body:
ret void
}
; EG-CHECK: @main2
; EG-CHECK: T{{[0-9]+}}.ZXY0
define void @main2() #0 {
main_body:
%0 = call float @llvm.R600.load.input(i32 4)
%1 = call float @llvm.R600.load.input(i32 5)
%2 = call float @llvm.R600.load.input(i32 6)
%3 = call float @llvm.R600.load.input(i32 7)
%4 = load <4 x float> addrspace(8)* getelementptr ([1024 x <4 x float>] addrspace(8)* null, i64 0, i32 1)
%5 = extractelement <4 x float> %4, i32 0
%6 = call float @llvm.cos.f32(float %5)
%7 = load <4 x float> addrspace(8)* null
%8 = extractelement <4 x float> %7, i32 0
%9 = load <4 x float> addrspace(8)* null
%10 = extractelement <4 x float> %9, i32 1
%11 = insertelement <4 x float> undef, float %0, i32 0
%12 = insertelement <4 x float> %11, float %1, i32 1
%13 = insertelement <4 x float> %12, float %2, i32 2
%14 = insertelement <4 x float> %13, float %3, i32 3
call void @llvm.R600.store.swizzle(<4 x float> %14, i32 60, i32 1)
%15 = insertelement <4 x float> undef, float %6, i32 0
%16 = insertelement <4 x float> %15, float %8, i32 1
%17 = insertelement <4 x float> %16, float %10, i32 2
%18 = insertelement <4 x float> %17, float 0.000000e+00, i32 3
call void @llvm.R600.store.swizzle(<4 x float> %18, i32 0, i32 2)
ret void
}
; Function Attrs: readnone
declare float @llvm.R600.load.input(i32) #1
; Function Attrs: nounwind readonly
declare float @llvm.cos.f32(float) #2
declare void @llvm.R600.store.swizzle(<4 x float>, i32, i32)
attributes #0 = { "ShaderType"="1" }
attributes #1 = { readnone }
attributes #2 = { nounwind readonly }