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Factored out a bit of common code to mark VNInfos for deletion.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109388 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames 2010-07-26 01:49:41 +00:00
parent 84ae206c97
commit 6f4e4df100
2 changed files with 23 additions and 40 deletions
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1
include/llvm/CodeGen/LiveInterval.h
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@ -545,6 +545,7 @@ namespace llvm {
Ranges::iterator addRangeFrom(LiveRange LR, Ranges::iterator From);
void extendIntervalEndTo(Ranges::iterator I, SlotIndex NewEnd);
Ranges::iterator extendIntervalStartTo(Ranges::iterator I, SlotIndex NewStr);
void markValNoForDeletion(VNInfo *V);
LiveInterval& operator=(const LiveInterval& rhs); // DO NOT IMPLEMENT

62
lib/CodeGen/LiveInterval.cpp
View File

@ -166,6 +166,20 @@ bool LiveInterval::overlaps(SlotIndex Start, SlotIndex End) const {
return I != begin() && (--I)->end > Start;
}
/// ValNo is dead, remove it. If it is the largest value number, just nuke it
/// (and any other deleted values neighboring it), otherwise mark it as ~1U so
/// it can be nuked later.
void LiveInterval::markValNoForDeletion(VNInfo *ValNo) {
if (ValNo->id == getNumValNums()-1) {
do {
valnos.pop_back();
} while (!valnos.empty() && valnos.back()->isUnused());
} else {
ValNo->setIsUnused(true);
}
}
/// extendIntervalEndTo - This method is used when we want to extend the range
/// specified by I to end at the specified endpoint. To do this, we should
/// merge and eliminate all ranges that this will overlap with. The iterator is
@ -314,16 +328,8 @@ void LiveInterval::removeRange(SlotIndex Start, SlotIndex End,
break;
}
if (isDead) {
// Now that ValNo is dead, remove it. If it is the largest value
// number, just nuke it (and any other deleted values neighboring it),
// otherwise mark it as ~1U so it can be nuked later.
if (ValNo->id == getNumValNums()-1) {
do {
valnos.pop_back();
} while (!valnos.empty() && valnos.back()->isUnused());
} else {
ValNo->setIsUnused(true);
}
// Now that ValNo is dead, remove it.
markValNoForDeletion(ValNo);
}
}
@ -359,16 +365,8 @@ void LiveInterval::removeValNo(VNInfo *ValNo) {
if (I->valno == ValNo)
ranges.erase(I);
} while (I != E);
// Now that ValNo is dead, remove it. If it is the largest value
// number, just nuke it (and any other deleted values neighboring it),
// otherwise mark it as ~1U so it can be nuked later.
if (ValNo->id == getNumValNums()-1) {
do {
valnos.pop_back();
} while (!valnos.empty() && valnos.back()->isUnused());
} else {
ValNo->setIsUnused(true);
}
// Now that ValNo is dead, remove it.
markValNoForDeletion(ValNo);
}
/// getLiveRangeContaining - Return the live range that contains the
@ -586,16 +584,8 @@ void LiveInterval::MergeValueInAsValue(
break;
}
if (isDead) {
// Now that V1 is dead, remove it. If it is the largest value number,
// just nuke it (and any other deleted values neighboring it), otherwise
// mark it as ~1U so it can be nuked later.
if (V1->id == getNumValNums()-1) {
do {
valnos.pop_back();
} while (!valnos.empty() && valnos.back()->isUnused());
} else {
V1->setIsUnused(true);
}
// Now that V1 is dead, remove it.
markValNoForDeletion(V1);
}
}
}
@ -753,16 +743,8 @@ VNInfo* LiveInterval::MergeValueNumberInto(VNInfo *V1, VNInfo *V2) {
}
}
// Now that V1 is dead, remove it. If it is the largest value number, just
// nuke it (and any other deleted values neighboring it), otherwise mark it as
// ~1U so it can be nuked later.
if (V1->id == getNumValNums()-1) {
do {
valnos.pop_back();
} while (valnos.back()->isUnused());
} else {
V1->setIsUnused(true);
}
// Now that V1 is dead, remove it.
markValNoForDeletion(V1);
return V2;
}