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Adding kill info to val#.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40925 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-08-08 07:03:29 +00:00
parent c5f6a1f9d6
commit 24c2e5cf7e
2 changed files with 25 additions and 3 deletions
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15
include/llvm/CodeGen/LiveInterval.h
View File

@ -166,8 +166,23 @@ namespace llvm {
/// addKillForValNum - Add a kill instruction index to the specified value
/// number.
void addKillForValNum(unsigned ValNo, unsigned KillIdx) {
assert(ValNo < ValueNumberInfo.size());
ValueNumberInfo[ValNo].kills.push_back(KillIdx);
}
/// replaceKillForValNum - Replace a kill index of the specified value with
/// a new kill index.
bool replaceKillForValNum(unsigned ValNo, unsigned OldKill,
unsigned NewKill) {
SmallVector<unsigned, 4> kills = ValueNumberInfo[ValNo].kills;
SmallVector<unsigned, 4>::iterator I =
std::find(kills.begin(), kills.end(), OldKill);
if (I == kills.end())
return false;
kills.erase(I);
kills.push_back(NewKill);
return true;
}
VNInfo getValNumInfo(unsigned ValNo) const {
assert(ValNo < ValueNumberInfo.size());

13
lib/CodeGen/LiveIntervalAnalysis.cpp
View File

@ -457,6 +457,7 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb,
LiveRange LR(DefIndex, RedefIndex, ValNo);
DOUT << " replace range with " << LR;
interval.addRange(LR);
interval.addKillForValNum(ValNo, RedefIndex);
// If this redefinition is dead, we need to add a dummy unit live
// range covering the def slot.
@ -481,6 +482,8 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb,
DOUT << " Removing [" << Start << "," << End << "] from: ";
interval.print(DOUT, mri_); DOUT << "\n";
interval.removeRange(Start, End);
bool replaced = interval.replaceKillForValNum(0, End, Start);
assert(replaced && "Incorrect kill info?");
DOUT << " RESULT: "; interval.print(DOUT, mri_);
// Replace the interval with one of a NEW value number. Note that this
@ -488,6 +491,7 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb,
LiveRange LR(Start, End, interval.getNextValue(~0, 0));
DOUT << " replace range with " << LR;
interval.addRange(LR);
interval.addKillForValNum(LR.ValId, End);
DOUT << " RESULT: "; interval.print(DOUT, mri_);
}
@ -503,9 +507,10 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb,
else
ValNum = interval.getNextValue(defIndex, SrcReg);
LiveRange LR(defIndex,
getInstructionIndex(&mbb->back()) + InstrSlots::NUM, ValNum);
unsigned killIndex = getInstructionIndex(&mbb->back()) + InstrSlots::NUM;
LiveRange LR(defIndex, killIndex, ValNum);
interval.addRange(LR);
interval.addKillForValNum(ValNum, killIndex);
DOUT << " +" << LR;
}
}
@ -570,6 +575,7 @@ exit:
? OldLR->ValId : interval.getNextValue(start, SrcReg);
LiveRange LR(start, end, Id);
interval.addRange(LR);
interval.addKillForValNum(LR.ValId, end);
DOUT << " +" << LR << '\n';
}
@ -635,8 +641,9 @@ exit:
}
LiveRange LR(start, end, interval.getNextValue(start, 0));
DOUT << " +" << LR << '\n';
interval.addRange(LR);
interval.addKillForValNum(LR.ValId, end);
DOUT << " +" << LR << '\n';
}
/// computeIntervals - computes the live intervals for virtual