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More flexible TargetLowering LSR hooks for testing whether an immediate is a legal target address immediate or scale. 

llvm-svn: 35074
This commit is contained in:
Evan Cheng 2007-03-12 23:29:01 +00:00
parent 3ab7ea7965
commit b9dce9db85
2 changed files with 10 additions and 5 deletions
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5
llvm/lib/Target/PowerPC/PPCISelLowering.cpp
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@ -3152,8 +3152,9 @@ isOperandValidForConstraint(SDOperand Op, char Letter, SelectionDAG &DAG) {
}
/// isLegalAddressImmediate - Return true if the integer value can be used
/// as the offset of the target addressing mode.
bool PPCTargetLowering::isLegalAddressImmediate(int64_t V) const {
/// as the offset of the target addressing mode for load / store of the
/// given type.
bool PPCTargetLowering::isLegalAddressImmediate(int64_t V,const Type *Ty) const{
// PPC allows a sign-extended 16-bit immediate field.
return (V > -(1 << 16) && V < (1 << 16)-1);
}

10
llvm/lib/Target/PowerPC/PPCISelLowering.h
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@ -237,9 +237,13 @@ namespace llvm {
SelectionDAG &DAG);
/// isLegalAddressImmediate - Return true if the integer value can be used
/// as the offset of the target addressing mode.
virtual bool isLegalAddressImmediate(int64_t V) const;
virtual bool isLegalAddressImmediate(llvm::GlobalValue*) const;
/// as the offset of the target addressing mode for load / store of the
/// given type.
virtual bool isLegalAddressImmediate(int64_t V, const Type *Ty) const;
/// isLegalAddressImmediate - Return true if the GlobalValue can be used as
/// the offset of the target addressing mode.
virtual bool isLegalAddressImmediate(GlobalValue *GV) const;
SDOperand LowerFRAMEADDR(SDOperand Op, SelectionDAG &DAG);
};