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| author | Evan Cheng <evan.cheng@apple.com> | 2011-02-22 07:07:59 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2011-02-22 07:07:59 +0000 |
| commit | 666cf56668e5be83c4e8424c188f727a6b852312 (patch) | |
| tree | 47235078ed30958772ea89f389d209aa2e4aa40a | |
| parent | 2ce663031f9846e5a001b7fd9135d72a328bb98d (diff) | |
| download | bcm5719-llvm-666cf56668e5be83c4e8424c188f727a6b852312.tar.gz bcm5719-llvm-666cf56668e5be83c4e8424c188f727a6b852312.zip | |
Guard against de-referencing MBB.end().
llvm-svn: 126192
| -rw-r--r-- | llvm/lib/Target/ARM/Thumb2InstrInfo.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/Target/ARM/Thumb2InstrInfo.cpp b/llvm/lib/Target/ARM/Thumb2InstrInfo.cpp index 836c1baffd4..9b1073be3c8 100644 --- a/llvm/lib/Target/ARM/Thumb2InstrInfo.cpp +++ b/llvm/lib/Target/ARM/Thumb2InstrInfo.cpp @@ -95,8 +95,11 @@ Thumb2InstrInfo::ReplaceTailWithBranchTo(MachineBasicBlock::iterator Tail, bool Thumb2InstrInfo::isLegalToSplitMBBAt(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI) const { - while (MBBI->isDebugValue()) + while (MBBI->isDebugValue()) { ++MBBI; + if (MBBI == MBB.end()) + return false; + } unsigned PredReg = 0; return llvm::getITInstrPredicate(MBBI, PredReg) == ARMCC::AL; |
