From ead1b3f0bb70cd9c1ba7a853a79070cb47db9344 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sat, 4 Dec 2004 01:22:09 +0000 Subject: [PATCH] Prevent accessing past the end of the intervals vector, this fixes Prolang-C/bison in the JIT git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18477 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/LiveInterval.cpp | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/lib/CodeGen/LiveInterval.cpp b/lib/CodeGen/LiveInterval.cpp index 54e460f7b46..a8bc1615b41 100644 --- a/lib/CodeGen/LiveInterval.cpp +++ b/lib/CodeGen/LiveInterval.cpp @@ -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; }