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Move more logic into getTypeForExtArgOrReturn.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127809 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1293,9 +1293,10 @@ public:
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/// but this is not true all the time, e.g. i1 on x86-64. It is also not
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/// necessary for non-C calling conventions. The frontend should handle this
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/// and include all of the necessary information.
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virtual MVT
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getTypeForExtArgOrReturn(EVT VT, ISD::NodeType ExtendKind) const {
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return MVT::i32;
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virtual EVT getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
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ISD::NodeType ExtendKind) const {
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EVT MinVT = getRegisterType(Context, MVT::i32);
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return VT.bitsLT(MinVT) ? MinVT : VT;
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}
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/// LowerOperationWrapper - This callback is invoked by the type legalizer
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@ -1128,12 +1128,8 @@ void SelectionDAGBuilder::visitRet(const ReturnInst &I) {
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else if (F->paramHasAttr(0, Attribute::ZExt))
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ExtendKind = ISD::ZERO_EXTEND;
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if (ExtendKind != ISD::ANY_EXTEND && VT.isInteger()) {
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MVT ReturnMVT = TLI.getTypeForExtArgOrReturn(VT, ExtendKind);
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EVT MinVT = TLI.getRegisterType(*DAG.getContext(), ReturnMVT);
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if (VT.bitsLT(MinVT))
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VT = MinVT;
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}
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if (ExtendKind != ISD::ANY_EXTEND && VT.isInteger())
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VT = TLI.getTypeForExtArgOrReturn(*DAG.getContext(), VT, ExtendKind);
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unsigned NumParts = TLI.getNumRegisters(*DAG.getContext(), VT);
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EVT PartVT = TLI.getRegisterType(*DAG.getContext(), VT);
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@ -1448,13 +1448,18 @@ bool X86TargetLowering::isUsedByReturnOnly(SDNode *N) const {
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return HasRet;
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}
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MVT
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X86TargetLowering::getTypeForExtArgOrReturn(EVT VT,
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EVT
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X86TargetLowering::getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
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ISD::NodeType ExtendKind) const {
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MVT ReturnMVT;
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// TODO: Is this also valid on 32-bit?
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if (Subtarget->is64Bit() && VT == MVT::i1 && ExtendKind == ISD::ZERO_EXTEND)
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return MVT::i8;
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return MVT::i32;
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ReturnMVT = MVT::i8;
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else
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ReturnMVT = MVT::i32;
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EVT MinVT = getRegisterType(Context, ReturnMVT);
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return VT.bitsLT(MinVT) ? MinVT : VT;
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}
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/// LowerCallResult - Lower the result values of a call into the
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@ -843,8 +843,9 @@ namespace llvm {
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virtual bool isUsedByReturnOnly(SDNode *N) const;
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virtual MVT
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getTypeForExtArgOrReturn(EVT VT, ISD::NodeType ExtendKind) const;
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virtual EVT
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getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
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ISD::NodeType ExtendKind) const;
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virtual bool
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CanLowerReturn(CallingConv::ID CallConv, bool isVarArg,
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