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GlobalISel: add buildUndef method to MachineIRBuilder. NFC. 

llvm-svn: 297044
This commit is contained in:
Tim Northover 2017-03-06 18:36:40 +00:00
parent fb1a0a0d2f
commit 81dafc1c88
3 changed files with 8 additions and 1 deletions
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3
llvm/include/llvm/CodeGen/GlobalISel/MachineIRBuilder.h
View File

@ -451,6 +451,9 @@ public:
MachineInstrBuilder buildExtract(ArrayRef<unsigned> Results,
ArrayRef<uint64_t> Indices, unsigned Src);
/// Build and insert \p Res = IMPLICIT_DEF.
MachineInstrBuilder buildUndef(unsigned Dst);
/// Build and insert \p Res<def> = G_SEQUENCE \p Op0, \p Idx0...
///
/// G_SEQUENCE inserts each element of Ops into an IMPLICIT_DEF register,

2
llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
View File

@ -986,7 +986,7 @@ bool IRTranslator::translate(const Constant &C, unsigned Reg) {
else if (auto CF = dyn_cast<ConstantFP>(&C))
EntryBuilder.buildFConstant(Reg, *CF);
else if (isa<UndefValue>(C))
EntryBuilder.buildInstr(TargetOpcode::IMPLICIT_DEF).addDef(Reg);
EntryBuilder.buildUndef(Reg);
else if (isa<ConstantPointerNull>(C))
EntryBuilder.buildConstant(Reg, 0);
else if (auto GV = dyn_cast<GlobalValue>(&C))

4
llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
View File

@ -416,6 +416,10 @@ MachineIRBuilder::buildSequence(unsigned Res,
return MIB;
}
MachineInstrBuilder MachineIRBuilder::buildUndef(unsigned Res) {
return buildInstr(TargetOpcode::IMPLICIT_DEF).addDef(Res);
}
MachineInstrBuilder MachineIRBuilder::buildMerge(unsigned Res,
ArrayRef<unsigned> Ops) {