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Properly handle indirect win64 args when they're passed in memory

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79009 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov 2009-08-14 18:19:10 +00:00
parent 267a0ff045
commit 2247276c6f
2 changed files with 67 additions and 2 deletions
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12
lib/Target/X86/X86ISelLowering.cpp
View File

@ -1328,17 +1328,25 @@ X86TargetLowering::LowerMemArgument(SDValue Chain,
ISD::ArgFlagsTy Flags = Ins[i].Flags;
bool AlwaysUseMutable = (CallConv==CallingConv::Fast) && PerformTailCallOpt;
bool isImmutable = !AlwaysUseMutable && !Flags.isByVal();
EVT ValVT;
// If value is passed by pointer we have address passed instead of the value
// itself.
if (VA.getLocInfo() == CCValAssign::Indirect)
ValVT = VA.getLocVT();
else
ValVT = VA.getValVT();
// FIXME: For now, all byval parameter objects are marked mutable. This can be
// changed with more analysis.
// In case of tail call optimization mark all arguments mutable. Since they
// could be overwritten by lowering of arguments in case of a tail call.
int FI = MFI->CreateFixedObject(VA.getValVT().getSizeInBits()/8,
int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
VA.getLocMemOffset(), isImmutable);
SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
if (Flags.isByVal())
return FIN;
return DAG.getLoad(VA.getValVT(), dl, Chain, FIN,
return DAG.getLoad(ValVT, dl, Chain, FIN,
PseudoSourceValue::getFixedStack(FI), 0);
}

57
test/CodeGen/X86/2009-08-14-Win64MemoryIndirectArg.ll Normal file
View File

@ -0,0 +1,57 @@
; RUN: llvm-as < %s | llc
target triple = "x86_64-mingw"
; ModuleID = 'mm.bc'
type opaque ; type %0
type opaque ; type %1
define internal fastcc float @computeMipmappingRho(%0* %shaderExecutionStatePtr, i32 %index, <4 x float> %texCoord, <4 x float> %texCoordDX, <4 x float> %texCoordDY) readonly {
indexCheckBlock:
%indexCmp = icmp ugt i32 %index, 16 ; <i1> [#uses=1]
br i1 %indexCmp, label %zeroReturnBlock, label %primitiveTextureFetchBlock
primitiveTextureFetchBlock: ; preds = %indexCheckBlock
%pointerArithmeticTmp = bitcast %0* %shaderExecutionStatePtr to i8* ; <i8*> [#uses=1]
%pointerArithmeticTmp1 = getelementptr i8* %pointerArithmeticTmp, i64 1808 ; <i8*> [#uses=1]
%pointerArithmeticTmp2 = bitcast i8* %pointerArithmeticTmp1 to %1** ; <%1**> [#uses=1]
%primitivePtr = load %1** %pointerArithmeticTmp2 ; <%1*> [#uses=1]
%pointerArithmeticTmp3 = bitcast %1* %primitivePtr to i8* ; <i8*> [#uses=1]
%pointerArithmeticTmp4 = getelementptr i8* %pointerArithmeticTmp3, i64 19408 ; <i8*> [#uses=1]
%pointerArithmeticTmp5 = bitcast i8* %pointerArithmeticTmp4 to %1** ; <%1**> [#uses=1]
%primitiveTexturePtr = getelementptr %1** %pointerArithmeticTmp5, i32 %index ; <%1**> [#uses=1]
%primitiveTexturePtr6 = load %1** %primitiveTexturePtr ; <%1*> [#uses=2]
br label %textureCheckBlock
textureCheckBlock: ; preds = %primitiveTextureFetchBlock
%texturePtrInt = ptrtoint %1* %primitiveTexturePtr6 to i64 ; <i64> [#uses=1]
%testTextureNULL = icmp eq i64 %texturePtrInt, 0 ; <i1> [#uses=1]
br i1 %testTextureNULL, label %zeroReturnBlock, label %rhoCalculateBlock
rhoCalculateBlock: ; preds = %textureCheckBlock
%pointerArithmeticTmp7 = bitcast %1* %primitiveTexturePtr6 to i8* ; <i8*> [#uses=1]
%pointerArithmeticTmp8 = getelementptr i8* %pointerArithmeticTmp7, i64 640 ; <i8*> [#uses=1]
%pointerArithmeticTmp9 = bitcast i8* %pointerArithmeticTmp8 to <4 x float>* ; <<4 x float>*> [#uses=1]
%dimensionsPtr = load <4 x float>* %pointerArithmeticTmp9, align 1 ; <<4 x float>> [#uses=2]
%texDiffDX = fsub <4 x float> %texCoordDX, %texCoord ; <<4 x float>> [#uses=1]
%texDiffDY = fsub <4 x float> %texCoordDY, %texCoord ; <<4 x float>> [#uses=1]
%ddx = fmul <4 x float> %texDiffDX, %dimensionsPtr ; <<4 x float>> [#uses=2]
%ddx10 = fmul <4 x float> %texDiffDY, %dimensionsPtr ; <<4 x float>> [#uses=2]
%ddxSquared = fmul <4 x float> %ddx, %ddx ; <<4 x float>> [#uses=3]
%0 = shufflevector <4 x float> %ddxSquared, <4 x float> %ddxSquared, <4 x i32> <i32 1, i32 0, i32 0, i32 0> ; <<4 x float>> [#uses=1]
%dxSquared = fadd <4 x float> %ddxSquared, %0 ; <<4 x float>> [#uses=1]
%1 = call <4 x float> @llvm.x86.sse.sqrt.ss(<4 x float> %dxSquared) ; <<4 x float>> [#uses=1]
%ddySquared = fmul <4 x float> %ddx10, %ddx10 ; <<4 x float>> [#uses=3]
%2 = shufflevector <4 x float> %ddySquared, <4 x float> %ddySquared, <4 x i32> <i32 1, i32 0, i32 0, i32 0> ; <<4 x float>> [#uses=1]
%dySquared = fadd <4 x float> %ddySquared, %2 ; <<4 x float>> [#uses=1]
%3 = call <4 x float> @llvm.x86.sse.sqrt.ss(<4 x float> %dySquared) ; <<4 x float>> [#uses=1]
%4 = call <4 x float> @llvm.x86.sse.max.ss(<4 x float> %1, <4 x float> %3) ; <<4 x float>> [#uses=1]
%rho = extractelement <4 x float> %4, i32 0 ; <float> [#uses=1]
ret float %rho
zeroReturnBlock: ; preds = %textureCheckBlock, %indexCheckBlock
ret float 0.000000e+00
}
declare <4 x float> @llvm.x86.sse.sqrt.ss(<4 x float>) nounwind readnone
declare <4 x float> @llvm.x86.sse.max.ss(<4 x float>, <4 x float>) nounwind readnone