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Move more logic into getTypeForExtArgOrReturn.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127809 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Cameron Zwarich 2011-03-17 14:53:37 +00:00
parent 9e69ff914d
commit 7bbf0ee97c
4 changed files with 18 additions and 15 deletions
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7
include/llvm/Target/TargetLowering.h
View File

@ -1293,9 +1293,10 @@ public:
/// but this is not true all the time, e.g. i1 on x86-64. It is also not
/// necessary for non-C calling conventions. The frontend should handle this
/// and include all of the necessary information.
virtual MVT
getTypeForExtArgOrReturn(EVT VT, ISD::NodeType ExtendKind) const {
return MVT::i32;
virtual EVT getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
ISD::NodeType ExtendKind) const {
EVT MinVT = getRegisterType(Context, MVT::i32);
return VT.bitsLT(MinVT) ? MinVT : VT;
}
/// LowerOperationWrapper - This callback is invoked by the type legalizer

8
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -1128,12 +1128,8 @@ void SelectionDAGBuilder::visitRet(const ReturnInst &I) {
else if (F->paramHasAttr(0, Attribute::ZExt))
ExtendKind = ISD::ZERO_EXTEND;
if (ExtendKind != ISD::ANY_EXTEND && VT.isInteger()) {
MVT ReturnMVT = TLI.getTypeForExtArgOrReturn(VT, ExtendKind);
EVT MinVT = TLI.getRegisterType(*DAG.getContext(), ReturnMVT);
if (VT.bitsLT(MinVT))
VT = MinVT;
}
if (ExtendKind != ISD::ANY_EXTEND && VT.isInteger())
VT = TLI.getTypeForExtArgOrReturn(*DAG.getContext(), VT, ExtendKind);
unsigned NumParts = TLI.getNumRegisters(*DAG.getContext(), VT);
EVT PartVT = TLI.getRegisterType(*DAG.getContext(), VT);

13
lib/Target/X86/X86ISelLowering.cpp
View File

@ -1448,13 +1448,18 @@ bool X86TargetLowering::isUsedByReturnOnly(SDNode *N) const {
return HasRet;
}
MVT
X86TargetLowering::getTypeForExtArgOrReturn(EVT VT,
EVT
X86TargetLowering::getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
ISD::NodeType ExtendKind) const {
MVT ReturnMVT;
// TODO: Is this also valid on 32-bit?
if (Subtarget->is64Bit() && VT == MVT::i1 && ExtendKind == ISD::ZERO_EXTEND)
return MVT::i8;
return MVT::i32;
ReturnMVT = MVT::i8;
else
ReturnMVT = MVT::i32;
EVT MinVT = getRegisterType(Context, ReturnMVT);
return VT.bitsLT(MinVT) ? MinVT : VT;
}
/// LowerCallResult - Lower the result values of a call into the

5
lib/Target/X86/X86ISelLowering.h
View File

@ -843,8 +843,9 @@ namespace llvm {
virtual bool isUsedByReturnOnly(SDNode *N) const;
virtual MVT
getTypeForExtArgOrReturn(EVT VT, ISD::NodeType ExtendKind) const;
virtual EVT
getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
ISD::NodeType ExtendKind) const;
virtual bool
CanLowerReturn(CallingConv::ID CallConv, bool isVarArg,