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Check that iterator I is not the end iterator.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167086 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2012-10-31 00:50:52 +00:00
parent 3a9b71434c
commit dc6d846df5
1 changed files with 3 additions and 2 deletions
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5
lib/CodeGen/MachineInstr.cpp
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@ -1015,9 +1015,10 @@ MachineInstr::getRegClassConstraint(unsigned OpIdx,
unsigned MachineInstr::getBundleSize() const {
assert(isBundle() && "Expecting a bundle");
MachineBasicBlock::const_instr_iterator I = *this;
const MachineBasicBlock *MBB = getParent();
MachineBasicBlock::const_instr_iterator I = *this, E = MBB->instr_end();
unsigned Size = 0;
while ((++I)->isInsideBundle()) {
while ((++I != E) && I->isInsideBundle()) {
++Size;
}
assert(Size > 1 && "Malformed bundle");