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- Remove calls to copyKillDeadInfo which is an N^2 function. Instead, propagate kill / dead markers as new instructions are constructed in foldMemoryOperand, convertToThressAddress, etc.

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- Also remove LiveVariables::instructionChanged, etc. Replace all calls with cheaper calls which update VarInfo kill list.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53097 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2008-07-03 09:09:37 +00:00
parent f9d0318950
commit 9f1c8317a4
16 changed files with 225 additions and 260 deletions
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lib/CodeGen/TwoAddressInstructionPass.cpp
+4 -7
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@@ -184,11 +184,8 @@ bool TwoAddressInstructionPass::Sink3AddrInstruction(MachineBasicBlock *MBB,
KillMO = MI->findRegisterUseOperand(SavedReg, false, TRI);
KillMO->setIsKill(true);
if (LV) {
LiveVariables::VarInfo& VarInfo = LV->getVarInfo(SavedReg);
VarInfo.removeKill(KillMI);
VarInfo.Kills.push_back(MI);
}
if (LV)
LV->replaceKillInstruction(SavedReg, KillMI, MI);
// Move instruction to its destination.
MBB->remove(MI);
@@ -454,10 +451,10 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
// regB is used in this BB.
varInfoB.UsedBlocks[mbbi->getNumber()] = true;
if (LV->removeVirtualRegisterKilled(regB, mbbi, mi))
if (LV->removeVirtualRegisterKilled(regB, mi))
LV->addVirtualRegisterKilled(regB, prevMi);
if (LV->removeVirtualRegisterDead(regB, mbbi, mi))
if (LV->removeVirtualRegisterDead(regB, mi))
LV->addVirtualRegisterDead(regB, prevMi);
}