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Be more agressive when joining ranges.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11575 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos 2004-02-18 04:38:37 +00:00
parent 99d9923608
commit 23c114fd3b
1 changed files with 9 additions and 9 deletions
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18
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -625,10 +625,10 @@ void LiveIntervals::Interval::join(const LiveIntervals::Interval& other)
LiveIntervals::Interval::Ranges::iterator
LiveIntervals::Interval::mergeRangesForward(Ranges::iterator it)
{
for (Ranges::iterator next = it + 1;
next != ranges.end() && it->second >= next->first; ) {
it->second = std::max(it->second, next->second);
next = ranges.erase(next);
for (Ranges::iterator n = next(it);
n != ranges.end() && ((it->second & 1) + it->second) >= n->first; ) {
it->second = std::max(it->second, n->second);
n = ranges.erase(n);
}
return it;
}
@ -637,12 +637,12 @@ LiveIntervals::Interval::Ranges::iterator
LiveIntervals::Interval::mergeRangesBackward(Ranges::iterator it)
{
while (it != ranges.begin()) {
Ranges::iterator prev = it - 1;
if (it->first > prev->second) break;
Ranges::iterator p = prior(it);
if (it->first > ((p->second & 1) + p->second)) break;
it->first = std::min(it->first, prev->first);
it->second = std::max(it->second, prev->second);
it = ranges.erase(prev);
it->first = std::min(it->first, p->first);
it->second = std::max(it->second, p->second);
it = ranges.erase(p);
}
return it;