Check that iterator I is not the end iterator.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167086 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index e888576..ce8d520 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -1015,9 +1015,10 @@
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");