diff options
Diffstat (limited to 'lib/CodeGen/LiveIntervalUnion.cpp')
| -rw-r--r-- | lib/CodeGen/LiveIntervalUnion.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/CodeGen/LiveIntervalUnion.cpp b/lib/CodeGen/LiveIntervalUnion.cpp index 7ebe96f066..cec68850fa 100644 --- a/lib/CodeGen/LiveIntervalUnion.cpp +++ b/lib/CodeGen/LiveIntervalUnion.cpp @@ -238,7 +238,7 @@ collectInterferingVRegs(unsigned MaxInterferingRegs) { InterferenceResult IR = firstInterference(); LiveInterval::iterator VirtRegEnd = VirtReg->end(); LiveInterval *RecentInterferingVReg = NULL; - while (IR.LiveUnionI.valid()) { + if (IR.VirtRegI != VirtRegEnd) while (IR.LiveUnionI.valid()) { // Advance the union's iterator to reach an unseen interfering vreg. do { if (IR.LiveUnionI.value() == RecentInterferingVReg) |