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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-12-17 23:16:38 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-12-17 23:16:38 +0000 |
| commit | 8d121404370cd57be7e72543127a1afe2faa1b10 (patch) | |
| tree | f1031385bc2a5e61ab4ed51df2ad8c2d5bb3283d /lib/CodeGen/LiveIntervalUnion.cpp | |
| parent | af24964251e27c2dd863239ba66ffd967b593be5 (diff) | |
| download | llvm-8d121404370cd57be7e72543127a1afe2faa1b10.tar.gz llvm-8d121404370cd57be7e72543127a1afe2faa1b10.tar.bz2 llvm-8d121404370cd57be7e72543127a1afe2faa1b10.tar.xz | |
Avoid dereferencing end() in collectInterferingVRegs() when there is no
interference.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122108 91177308-0d34-0410-b5e6-96231b3b80d8
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) |