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Re-enable empty block indexing by default, since it doesn't seem to have any

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impact on code quality or compile time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52329 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2008-06-16 16:58:24 +00:00
parent 0a9aaf46be
commit 1fbb4545d4
1 changed files with 9 additions and 21 deletions
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30
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -44,8 +44,6 @@ static cl::opt<bool> SplitAtBB("split-intervals-at-bb",
cl::init(true), cl::Hidden);
static cl::opt<int> SplitLimit("split-limit",
cl::init(-1), cl::Hidden);
static cl::opt<bool> EmptyBBIndex("empty-bb-index",
cl::init(false), cl::Hidden);
STATISTIC(numIntervals, "Number of original intervals");
STATISTIC(numIntervalsAfter, "Number of intervals after coalescing");
@ -102,23 +100,15 @@ void LiveIntervals::computeNumbering() {
i2miMap_.push_back(I);
MIIndex += InstrSlots::NUM;
}
// Set the MBB2IdxMap entry for this MBB.
if (!EmptyBBIndex) {
MBB2IdxMap[MBB->getNumber()] = (StartIdx == MIIndex)
? std::make_pair(StartIdx, StartIdx) // Empty MBB
: std::make_pair(StartIdx, MIIndex - 1);
Idx2MBBMap.push_back(std::make_pair(StartIdx, MBB));
} else {
if (StartIdx == MIIndex) {
// Empty MBB
MIIndex += InstrSlots::NUM;
i2miMap_.push_back(0);
}
MBB2IdxMap[MBB->getNumber()] = std::make_pair(StartIdx, MIIndex - 1);
Idx2MBBMap.push_back(std::make_pair(StartIdx, MBB));
if (StartIdx == MIIndex) {
// Empty MBB
MIIndex += InstrSlots::NUM;
i2miMap_.push_back(0);
}
// Set the MBB2IdxMap entry for this MBB.
MBB2IdxMap[MBB->getNumber()] = std::make_pair(StartIdx, MIIndex - 1);
Idx2MBBMap.push_back(std::make_pair(StartIdx, MBB));
}
std::sort(Idx2MBBMap.begin(), Idx2MBBMap.end(), Idx2MBBCompare());
@ -675,9 +665,7 @@ void LiveIntervals::computeIntervals() {
MIIndex += InstrSlots::NUM;
}
if (EmptyBBIndex) {
if (MBB->begin() == miEnd) MIIndex += InstrSlots::NUM; // Empty MBB
}
if (MBB->begin() == miEnd) MIIndex += InstrSlots::NUM; // Empty MBB
}
}