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Rewrite instructions as part of ConnectedVNInfoEqClasses::Distribute.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127779 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-03-17 00:23:45 +00:00
parent ede4e28ca3
commit 2254227791
4 changed files with 40 additions and 52 deletions
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lib/CodeGen/SplitKit.cpp
+1 -24
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@@ -771,28 +771,6 @@ void SplitEditor::rewriteAssigned(bool ExtendRanges) {
}
}
/// rewriteSplit - Rewrite uses of Intvs[0] according to the ConEQ mapping.
void SplitEditor::rewriteComponents(const SmallVectorImpl<LiveInterval*> &Intvs,
const ConnectedVNInfoEqClasses &ConEq) {
for (MachineRegisterInfo::reg_iterator RI = MRI.reg_begin(Intvs[0]->reg),
RE = MRI.reg_end(); RI != RE;) {
MachineOperand &MO = RI.getOperand();
MachineInstr *MI = MO.getParent();
++RI;
if (MO.isUse() && MO.isUndef())
continue;
// DBG_VALUE instructions should have been eliminated earlier.
SlotIndex Idx = LIS.getInstructionIndex(MI);
Idx = MO.isUse() ? Idx.getUseIndex() : Idx.getDefIndex();
DEBUG(dbgs() << " rewr BB#" << MI->getParent()->getNumber() << '\t'
<< Idx << ':');
const VNInfo *VNI = Intvs[0]->getVNInfoAt(Idx);
assert(VNI && "Interval not live at use.");
MO.setReg(Intvs[ConEq.getEqClass(VNI)]->reg);
DEBUG(dbgs() << VNI->id << '\t' << *MI);
}
}
void SplitEditor::deleteRematVictims() {
SmallVector<MachineInstr*, 8> Dead;
for (LiveInterval::const_vni_iterator I = Edit->getParent().vni_begin(),
@@ -889,8 +867,7 @@ void SplitEditor::finish() {
dups.push_back(li);
for (unsigned i = 1; i != NumComp; ++i)
dups.push_back(&Edit->create(MRI, LIS, VRM));
rewriteComponents(dups, ConEQ);
ConEQ.Distribute(&dups[0]);
ConEQ.Distribute(&dups[0], MRI);
}
// Calculate spill weight and allocation hints for new intervals.