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Only remap each VNInfo once when doing renumbering.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54420 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2008-08-06 18:35:45 +00:00
parent 8a1510d192
commit 788d04152a
1 changed files with 15 additions and 13 deletions
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28
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -64,8 +64,6 @@ void LiveIntervals::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<LiveVariables>();
AU.addPreservedID(MachineLoopInfoID);
AU.addPreservedID(MachineDominatorsID);
AU.addPreservedID(PHIEliminationID);
AU.addRequiredID(PHIEliminationID);
AU.addRequiredID(TwoAddressInstructionPassID);
MachineFunctionPass::getAnalysisUsage(AU);
}
@ -129,7 +127,7 @@ void LiveIntervals::computeNumbering() {
std::sort(Idx2MBBMap.begin(), Idx2MBBMap.end(), Idx2MBBCompare());
if (!OldI2MI.empty())
for (iterator OI = begin(), OE = end(); OI != OE; ++OI)
for (iterator OI = begin(), OE = end(); OI != OE; ++OI) {
for (LiveInterval::iterator LI = OI->second.begin(),
LE = OI->second.end(); LI != LE; ++LI) {
@ -172,15 +170,18 @@ void LiveIntervals::computeNumbering() {
else
LI->end = InstrSlots::NUM * i2miMap_.size();
}
}
for (LiveInterval::vni_iterator VNI = OI->second.vni_begin(),
VNE = OI->second.vni_end(); VNI != VNE; ++VNI) {
VNInfo* vni = *VNI;
// Remap the VNInfo def index, which works the same as the
// start indices above.
VNInfo* vni = LI->valno;
// VN's with special sentinel defs don't need to be remapped.
// start indices above. VN's with special sentinel defs
// don't need to be remapped.
if (vni->def != ~0U && vni->def != ~1U) {
index = vni->def / InstrSlots::NUM;
offset = vni->def % InstrSlots::NUM;
unsigned index = vni->def / InstrSlots::NUM;
unsigned offset = vni->def % InstrSlots::NUM;
if (offset == InstrSlots::LOAD) {
std::vector<IdxMBBPair>::const_iterator I =
std::lower_bound(OldI2MBB.begin(), OldI2MBB.end(), vni->def);
@ -200,14 +201,14 @@ void LiveIntervals::computeNumbering() {
// PHI kills don't need to be remapped.
if (!vni->kills[i]) continue;
index = (vni->kills[i]-1) / InstrSlots::NUM;
offset = vni->kills[i] % InstrSlots::NUM;
if (offset == InstrSlots::LOAD) {
unsigned index = (vni->kills[i]-1) / InstrSlots::NUM;
unsigned offset = vni->kills[i] % InstrSlots::NUM;
if (offset == InstrSlots::STORE) {
std::vector<IdxMBBPair>::const_iterator I =
std::lower_bound(OldI2MBB.begin(), OldI2MBB.end(), vni->kills[i]);
--I;
vni->kills[i] = getMBBEndIdx(I->second) + 1;
vni->kills[i] = getMBBEndIdx(I->second);
} else {
unsigned idx = index;
while (index < OldI2MI.size() && !OldI2MI[index]) ++index;
@ -220,6 +221,7 @@ void LiveIntervals::computeNumbering() {
}
}
}
}
}
/// runOnMachineFunction - Register allocate the whole function