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Take another .7 seconds off of linear scan time. 

llvm-svn: 17936
This commit is contained in:
Chris Lattner 2004-11-18 04:02:11 +00:00
parent 850852c789
commit 7598c316e5
1 changed files with 5 additions and 3 deletions
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8
llvm/lib/CodeGen/LiveInterval.cpp
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@ -68,14 +68,16 @@ bool LiveInterval::overlapsFrom(const LiveInterval& other,
const_iterator je = other.end();
assert((StartPos->start <= i->start || StartPos == other.begin()) &&
"Bogus start position hint!");
StartPos != other.end() && "Bogus start position hint!");
if (i->start < j->start) {
i = std::upper_bound(i, ie, j->start);
if (i != ranges.begin()) --i;
} else if (j->start < i->start) {
j = std::upper_bound(j, je, i->start);
if (j != other.ranges.begin()) --j;
if ((++StartPos)->start <= i->start) {
j = std::upper_bound(j, je, i->start);
if (j != other.ranges.begin()) --j;
}
} else {
return true;
}