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Minor spiller tweak to unfavor reload into load/store instructions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52477 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2008-06-19 01:16:17 +00:00
parent 6c5e561668
commit bdf34bc12b
3 changed files with 21 additions and 6 deletions
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12
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -988,6 +988,7 @@ 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())
@ -1055,7 +1056,7 @@ rewriteInstructionForSpills(const LiveInterval &li, const VNInfo *VNI,
}
// Update stack slot spill weight if we are splitting.
float Weight = getSpillWeight(HasDef, HasUse, loopDepth);
float Weight = getSpillWeight(HasDef, HasUse, isMem, loopDepth);
if (!TrySplit)
SSWeight += Weight;
@ -1248,6 +1249,7 @@ 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;
@ -1395,7 +1397,7 @@ rewriteInstructionsForSpills(const LiveInterval &li, bool TrySplit,
// Update spill weight.
unsigned loopDepth = loopInfo->getLoopDepth(MBB);
nI.weight += getSpillWeight(HasDef, HasUse, loopDepth);
nI.weight += getSpillWeight(HasDef, HasUse, isMem, loopDepth);
}
if (NewVReg && TrySplit && AllCanFold) {
@ -1637,6 +1639,7 @@ 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();
@ -1689,7 +1692,7 @@ addIntervalsForSpills(const LiveInterval &li,
// Update spill slot weight.
if (!isReMat)
SSWeight += getSpillWeight(true, false, loopDepth);
SSWeight += getSpillWeight(true, false, isMem, loopDepth);
}
Id = SpillMBBs.find_next(Id);
}
@ -1709,6 +1712,7 @@ 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) {
@ -1762,7 +1766,7 @@ addIntervalsForSpills(const LiveInterval &li,
// Update spill slot weight.
if (!isReMat)
SSWeight += getSpillWeight(false, true, loopDepth);
SSWeight += getSpillWeight(false, true, isMem, loopDepth);
}
Id = RestoreMBBs.find_next(Id);
}