commit 056063e2645d86b11a441abfff4bfd96dc4edf8c
author Alkis Evlogimenos <alkis@evlogimenos.com> Mon Dec 22 13:54:29 2003 +0000
committer Alkis Evlogimenos <alkis@evlogimenos.com> Mon Dec 22 13:54:29 2003 +0000
tree 0c88f1fdf43bebca74130eafc3474d45b357d3cd
parent 500597a1c39e91a3020587318ed61e737b6c613a

Fix crash when compiling twolf.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10584 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/LiveIntervalAnalysis.cpp

diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index 05b4f5a..e4b134b 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -146,7 +146,8 @@
         unsigned liveBlockIndex = it->first;
         MachineBasicBlock* liveBlock = it->second;
         if (liveBlockIndex < vi.AliveBlocks.size() &&
-            vi.AliveBlocks[liveBlockIndex]) {
+            vi.AliveBlocks[liveBlockIndex] &&
+            !liveBlock->empty()) {
             unsigned start =  getInstructionIndex(liveBlock->front());
             unsigned end = getInstructionIndex(liveBlock->back()) + 1;
             interval->addRange(start, end);