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R600: Always implement both versions of isTruncateFree and add a sanity check.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201222 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2014-02-12 10:17:54 +00:00
parent cfd14e6aea
commit eee40f92a9
2 changed files with 12 additions and 5 deletions
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10
lib/Target/R600/AMDGPUISelLowering.cpp
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@ -232,9 +232,15 @@ bool AMDGPUTargetLowering::isFNegFree(EVT VT) const {
return VT == MVT::f32;
}
bool AMDGPUTargetLowering::isTruncateFree(EVT, EVT Dest) const {
bool AMDGPUTargetLowering::isTruncateFree(EVT Source, EVT Dest) const {
// Truncate is just accessing a subregister.
return (Dest.getSizeInBits() % 32 == 0);
return Dest.bitsLT(Source) && (Dest.getSizeInBits() % 32 == 0);
}
bool AMDGPUTargetLowering::isTruncateFree(Type *Source, Type *Dest) const {
// Truncate is just accessing a subregister.
return Dest->getPrimitiveSizeInBits() < Source->getPrimitiveSizeInBits() &&
(Dest->getPrimitiveSizeInBits() % 32 == 0);
}
//===---------------------------------------------------------------------===//

7
lib/Target/R600/AMDGPUISelLowering.h
View File

@ -79,10 +79,11 @@ protected:
public:
AMDGPUTargetLowering(TargetMachine &TM);
virtual bool isFAbsFree(EVT VT) const;
virtual bool isFNegFree(EVT VT) const;
virtual bool isFAbsFree(EVT VT) const LLVM_OVERRIDE;
virtual bool isFNegFree(EVT VT) const LLVM_OVERRIDE;
virtual bool isTruncateFree(EVT Src, EVT Dest) const LLVM_OVERRIDE;
virtual MVT getVectorIdxTy() const;
virtual bool isTruncateFree(Type *Src, Type *Dest) const LLVM_OVERRIDE;
virtual MVT getVectorIdxTy() const LLVM_OVERRIDE;
virtual bool isLoadBitCastBeneficial(EVT, EVT) const LLVM_OVERRIDE;
virtual SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv,
bool isVarArg,