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- LiveInterval value#'s now have 3 components: def instruction #,

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kill instruction #, and source register number (iff the value# is defined by a
copy).
- Now def instruction # is set for every value#, not just for copy defined ones.
- Update some outdated code related inactive live ranges.
- Kill info not yet set. That's next patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40913 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2007-08-07 23:49:57 +00:00
parent 002fe25dd7
commit a8d94f1315
4 changed files with 58 additions and 41 deletions
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13
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -351,7 +351,7 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb,
unsigned ValNum;
unsigned SrcReg, DstReg;
if (!tii_->isMoveInstr(*mi, SrcReg, DstReg))
ValNum = interval.getNextValue(~0U, 0);
ValNum = interval.getNextValue(defIndex, 0);
else
ValNum = interval.getNextValue(defIndex, SrcReg);
@ -450,7 +450,7 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb,
interval.setValueNumberInfo(1, interval.getValNumInfo(0));
// Value#0 is now defined by the 2-addr instruction.
interval.setValueNumberInfo(0, std::make_pair(~0U, 0U));
interval.setValueNumberInfo(0, LiveInterval::VNInfo(DefIndex, ~0U, 0U));
// Add the new live interval which replaces the range for the input copy.
LiveRange LR(DefIndex, RedefIndex, ValNo);
@ -484,7 +484,7 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb,
// Replace the interval with one of a NEW value number. Note that this
// value number isn't actually defined by an instruction, weird huh? :)
LiveRange LR(Start, End, interval.getNextValue(~0U, 0));
LiveRange LR(Start, End, interval.getNextValue(~0, 0));
DOUT << " replace range with " << LR;
interval.addRange(LR);
DOUT << " RESULT: "; interval.print(DOUT, mri_);
@ -498,7 +498,7 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb,
unsigned ValNum;
unsigned SrcReg, DstReg;
if (!tii_->isMoveInstr(*mi, SrcReg, DstReg))
ValNum = interval.getNextValue(~0U, 0);
ValNum = interval.getNextValue(defIndex, 0);
else
ValNum = interval.getNextValue(defIndex, SrcReg);
@ -566,8 +566,7 @@ exit:
// Already exists? Extend old live interval.
LiveInterval::iterator OldLR = interval.FindLiveRangeContaining(start);
unsigned Id = (OldLR != interval.end())
? OldLR->ValId
: interval.getNextValue(SrcReg != 0 ? start : ~0U, SrcReg);
? OldLR->ValId : interval.getNextValue(start, SrcReg);
LiveRange LR(start, end, Id);
interval.addRange(LR);
DOUT << " +" << LR << '\n';
@ -634,7 +633,7 @@ exit:
}
}
LiveRange LR(start, end, interval.getNextValue(~0U, 0));
LiveRange LR(start, end, interval.getNextValue(start, 0));
DOUT << " +" << LR << '\n';
interval.addRange(LR);
}