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[RegBankSelect] Use the OperandMapper class to hold remap information.

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Now that we have an entity that hold the remap information the
rewritting should be easier to do.

No functional changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272164 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Quentin Colombet 2016-06-08 16:30:55 +00:00
parent cf4d78fc0d
commit 05d61b46ed
1 changed files with 8 additions and 10 deletions
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18
lib/CodeGen/GlobalISel/RegBankSelect.cpp
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@ -108,6 +108,9 @@ void RegBankSelect::repairReg(
RegBankSelect::RepairingPlacement &RepairPt,
const iterator_range<SmallVectorImpl<unsigned>::const_iterator> &NewVRegs) {
assert(ValMapping.BreakDown.size() == 1 && "Not yet implemented");
// An empty range of new register means no repairing.
assert(NewVRegs.begin() != NewVRegs.end() && "We should not have to repair");
// Assume we are repairing a use and thus, the original reg will be
// the source of the repairing.
unsigned Src = MO.getReg();
@ -461,7 +464,9 @@ void RegBankSelect::applyMapping(
"Rewriting of MI not implemented yet");
// First, place the repairing code.
bool NeedRewrite = false;
SmallVector<unsigned, 8> NewVRegs;
// OpdMapper will hold all the information needed for the rewritting.
RegisterBankInfo::OperandsMapper OpdMapper(MI, InstrMapping, *MRI);
for (RepairingPlacement &RepairPt : RepairPts) {
assert(RepairPt.canMaterialize() &&
RepairPt.getKind() != RepairingPlacement::Impossible &&
@ -483,15 +488,8 @@ void RegBankSelect::applyMapping(
MRI->setRegBank(Reg, *ValMapping.BreakDown[0].RegBank);
break;
case RepairingPlacement::Insert:
// We need as many new virtual registers as the number of partial mapping.
for (const RegisterBankInfo::PartialMapping &PartMap :
ValMapping.BreakDown) {
unsigned Tmp = MRI->createGenericVirtualRegister(PartMap.Length);
MRI->setRegBank(Tmp, *PartMap.RegBank);
NewVRegs.push_back(Tmp);
}
repairReg(MO, ValMapping, RepairPt,
make_range(NewVRegs.end() - BreakDownSize, NewVRegs.end()));
OpdMapper.createVRegs(OpIdx);
repairReg(MO, ValMapping, RepairPt, OpdMapper.getVRegs(OpIdx));
break;
default:
llvm_unreachable("Other kind should not happen");