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Undo spill weight tweak. Need to investigate the performance regressions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52572 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2008-06-21 06:45:54 +00:00
parent 16c6859651
commit c3417609ae
6 changed files with 10 additions and 19 deletions
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12
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -979,7 +979,6 @@ rewriteInstructionForSpills(const LiveInterval &li, const VNInfo *VNI,
unsigned loopDepth = loopInfo->getLoopDepth(MBB);
bool CanFold = false;
RestartInstruction:
bool isMem = MI->getDesc().mayLoad() || MI->getDesc().mayStore();
for (unsigned i = 0; i != MI->getNumOperands(); ++i) {
MachineOperand& mop = MI->getOperand(i);
if (!mop.isRegister())
@ -1047,7 +1046,7 @@ rewriteInstructionForSpills(const LiveInterval &li, const VNInfo *VNI,
}
// Update stack slot spill weight if we are splitting.
float Weight = getSpillWeight(HasDef, HasUse, isMem, loopDepth);
float Weight = getSpillWeight(HasDef, HasUse, loopDepth);
if (!TrySplit)
SSWeight += Weight;
@ -1240,7 +1239,6 @@ rewriteInstructionsForSpills(const LiveInterval &li, bool TrySplit,
bool MIHasUse = rwi.HasUse;
bool MIHasDef = rwi.HasDef;
MachineInstr *MI = rwi.MI;
bool isMem = MI->getDesc().mayLoad() || MI->getDesc().mayStore();
// If MI def and/or use the same register multiple times, then there
// are multiple entries.
unsigned NumUses = MIHasUse;
@ -1388,7 +1386,7 @@ rewriteInstructionsForSpills(const LiveInterval &li, bool TrySplit,
// Update spill weight.
unsigned loopDepth = loopInfo->getLoopDepth(MBB);
nI.weight += getSpillWeight(HasDef, HasUse, isMem, loopDepth);
nI.weight += getSpillWeight(HasDef, HasUse, loopDepth);
}
if (NewVReg && TrySplit && AllCanFold) {
@ -1630,7 +1628,6 @@ addIntervalsForSpills(const LiveInterval &li,
LiveInterval &nI = getOrCreateInterval(VReg);
bool isReMat = vrm.isReMaterialized(VReg);
MachineInstr *MI = getInstructionFromIndex(index);
bool isMem = MI->getDesc().mayLoad() || MI->getDesc().mayStore();
bool CanFold = false;
bool FoundUse = false;
Ops.clear();
@ -1683,7 +1680,7 @@ addIntervalsForSpills(const LiveInterval &li,
// Update spill slot weight.
if (!isReMat)
SSWeight += getSpillWeight(true, false, isMem, loopDepth);
SSWeight += getSpillWeight(true, false, loopDepth);
}
Id = SpillMBBs.find_next(Id);
}
@ -1703,7 +1700,6 @@ addIntervalsForSpills(const LiveInterval &li,
LiveInterval &nI = getOrCreateInterval(VReg);
bool isReMat = vrm.isReMaterialized(VReg);
MachineInstr *MI = getInstructionFromIndex(index);
bool isMem = MI->getDesc().mayLoad() || MI->getDesc().mayStore();
bool CanFold = false;
Ops.clear();
if (restores[i].canFold) {
@ -1757,7 +1753,7 @@ addIntervalsForSpills(const LiveInterval &li,
// Update spill slot weight.
if (!isReMat)
SSWeight += getSpillWeight(false, true, isMem, loopDepth);
SSWeight += getSpillWeight(false, true, loopDepth);
}
Id = RestoreMBBs.find_next(Id);
}