}
MachineBasicBlock::iterator MachineBasicBlock::getFirstTerminator() {
- iterator B = begin(), I = end();
- iterator Term = I;
- while (I != B) {
- --I;
- // Ignore any debug values after the first terminator.
- if (I->isDebugValue())
- continue;
- // Stop once we see a non-debug non-terminator.
- if (!I->getDesc().isTerminator())
- break;
- // Earliest terminator so far.
- Term = I;
- }
- // Return the first terminator, or end().
- // Everything after Term is terminators and debug values.
- return Term;
+ iterator I = end();
+ while (I != begin() && ((--I)->getDesc().isTerminator() || I->isDebugValue()))
+ ; /*noop */
+ while (I != end() && !I->getDesc().isTerminator())
+ ++I;
+ return I;
}
MachineBasicBlock::iterator MachineBasicBlock::getLastNonDebugInstr() {
return end();
}
+const MachineBasicBlock *MachineBasicBlock::getLandingPadSuccessor() const {
+ // A block with a landing pad successor only has one other successor.
+ if (succ_size() > 2)
+ return 0;
+ for (const_succ_iterator I = succ_begin(), E = succ_end(); I != E; ++I)
+ if ((*I)->isLandingPad())
+ return *I;
+ return 0;
+}
+
void MachineBasicBlock::dump() const {
print(dbgs());
}