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Prevent accessing past the end of the intervals vector, this fixes

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Prolang-C/bison in the JIT


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18477 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-12-04 01:22:09 +00:00
parent 43ee293abe
commit ead1b3f0bb
1 changed files with 3 additions and 1 deletions
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4
lib/CodeGen/LiveInterval.cpp
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@ -74,7 +74,9 @@ bool LiveInterval::overlapsFrom(const LiveInterval& other,
i = std::upper_bound(i, ie, j->start);
if (i != ranges.begin()) --i;
} else if (j->start < i->start) {
if ((++StartPos)->start <= i->start) {
++StartPos;
if (StartPos != other.end() && StartPos->start <= i->start) {
assert(StartPos < other.end() && i < end());
j = std::upper_bound(j, je, i->start);
if (j != other.ranges.begin()) --j;
}