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Change TII::foldMemoryOperand API to require the machine instruction to be

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inserted in a MBB, and return an already inserted MI.

This target API change is necessary to allow foldMemoryOperand to call
storeToStackSlot and loadFromStackSlot when folding a COPY to a stack slot
reference in a target independent way.

The foldMemoryOperandImpl hook is going to change in the same way, but I'll wait
until COPY folding is actually implemented. Most targets only fold copies and
won't need to specialize this hook at all.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107991 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2010-07-09 17:29:08 +00:00
parent e664267ae7
commit e05442d508
6 changed files with 37 additions and 38 deletions
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lib/CodeGen/VirtRegRewriter.cpp
+8 -8
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@@ -1409,25 +1409,25 @@ OptimizeByUnfold(MachineBasicBlock::iterator &MII,
if (TII->unfoldMemoryOperand(MF, &MI, UnfoldVR, false, false, NewMIs)) {
assert(NewMIs.size() == 1);
MachineInstr *NewMI = NewMIs.back();
MBB->insert(MII, NewMI);
NewMIs.clear();
int Idx = NewMI->findRegisterUseOperandIdx(VirtReg, false);
assert(Idx != -1);
SmallVector<unsigned, 1> Ops;
Ops.push_back(Idx);
MachineInstr *FoldedMI = TII->foldMemoryOperand(MF, NewMI, Ops, SS);
MachineInstr *FoldedMI = TII->foldMemoryOperand(NewMI, Ops, SS);
NewMI->eraseFromParent();
if (FoldedMI) {
VRM->addSpillSlotUse(SS, FoldedMI);
if (!VRM->hasPhys(UnfoldVR))
VRM->assignVirt2Phys(UnfoldVR, UnfoldPR);
VRM->virtFolded(VirtReg, FoldedMI, VirtRegMap::isRef);
MII = MBB->insert(MII, FoldedMI);
MII = FoldedMI;
InvalidateKills(MI, TRI, RegKills, KillOps);
VRM->RemoveMachineInstrFromMaps(&MI);
MBB->erase(&MI);
MF.DeleteMachineInstr(NewMI);
return true;
}
MF.DeleteMachineInstr(NewMI);
}
}
@@ -1479,7 +1479,6 @@ CommuteToFoldReload(MachineBasicBlock::iterator &MII,
if (MII == MBB->begin() || !MII->killsRegister(SrcReg))
return false;
MachineFunction &MF = *MBB->getParent();
MachineInstr &MI = *MII;
MachineBasicBlock::iterator DefMII = prior(MII);
MachineInstr *DefMI = DefMII;
@@ -1510,11 +1509,12 @@ CommuteToFoldReload(MachineBasicBlock::iterator &MII,
MachineInstr *CommutedMI = TII->commuteInstruction(DefMI, true);
if (!CommutedMI)
return false;
MBB->insert(MII, CommutedMI);
SmallVector<unsigned, 1> Ops;
Ops.push_back(NewDstIdx);
MachineInstr *FoldedMI = TII->foldMemoryOperand(MF, CommutedMI, Ops, SS);
MachineInstr *FoldedMI = TII->foldMemoryOperand(CommutedMI, Ops, SS);
// Not needed since foldMemoryOperand returns new MI.
MF.DeleteMachineInstr(CommutedMI);
CommutedMI->eraseFromParent();
if (!FoldedMI)
return false;
@@ -1527,7 +1527,7 @@ CommuteToFoldReload(MachineBasicBlock::iterator &MII,
MachineInstr *StoreMI = MII;
VRM->addSpillSlotUse(SS, StoreMI);
VRM->virtFolded(VirtReg, StoreMI, VirtRegMap::isMod);
MII = MBB->insert(MII, FoldedMI); // Update MII to backtrack.
MII = FoldedMI; // Update MII to backtrack.
// Delete all 3 old instructions.
InvalidateKills(*ReloadMI, TRI, RegKills, KillOps);