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Guard against de-referencing MBB.end().

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126192 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2011-02-22 07:07:59 +00:00
parent af05c69ba0
commit 0a921698b6
1 changed files with 4 additions and 1 deletions
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5
lib/Target/ARM/Thumb2InstrInfo.cpp
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@ -95,8 +95,11 @@ Thumb2InstrInfo::ReplaceTailWithBranchTo(MachineBasicBlock::iterator Tail,
bool bool
Thumb2InstrInfo::isLegalToSplitMBBAt(MachineBasicBlock &MBB, Thumb2InstrInfo::isLegalToSplitMBBAt(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI) const { MachineBasicBlock::iterator MBBI) const {
while (MBBI->isDebugValue()) while (MBBI->isDebugValue()) {
++MBBI; ++MBBI;
if (MBBI == MBB.end())
return false;
}
unsigned PredReg = 0; unsigned PredReg = 0;
return llvm::getITInstrPredicate(MBBI, PredReg) == ARMCC::AL; return llvm::getITInstrPredicate(MBBI, PredReg) == ARMCC::AL;