From: Lang Hames <lhames@gmail.com>
Date: Thu, 22 Jul 2010 02:05:10 +0000 (+0000)
Subject: If 'other' was empty 'overlapsFrom(other, other.begin());' will segfault. This avoids... 
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=624e0b2be6a8db6187206090ee5bc8f24cf55cb7;p=oota-llvm.git

If 'other' was empty 'overlapsFrom(other, other.begin());' will segfault. This avoids that.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109075 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/CodeGen/LiveInterval.h b/include/llvm/CodeGen/LiveInterval.h
index 8d80efbc5c7..a0aea23c994 100644
--- a/include/llvm/CodeGen/LiveInterval.h
+++ b/include/llvm/CodeGen/LiveInterval.h
@@ -465,6 +465,8 @@ namespace llvm {
     /// overlaps - Return true if the intersection of the two live intervals is
     /// not empty.
     bool overlaps(const LiveInterval& other) const {
+      if (other.empty())
+        return false;
       return overlapsFrom(other, other.begin());
     }