// returning NULL.
return 0;
}
+
+bool PIC16InstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,
+ MachineBasicBlock *&TBB,
+ MachineBasicBlock *&FBB,
+ SmallVectorImpl<MachineOperand> &Cond,
+ bool AllowModify) const {
+ MachineBasicBlock::iterator I = MBB.end();
+ if (I == MBB.begin())
+ return true;
+
+ // Get the terminator instruction.
+ --I;
+ // Handle unconditional branches. If the unconditional branch's target is
+ // successor basic block then remove the unconditional branch.
+ if (I->getOpcode() == PIC16::br_uncond && AllowModify) {
+ if (MBB.isLayoutSuccessor(I->getOperand(0).getMBB())) {
+ TBB = 0;
+ I->eraseFromParent();
+ }
+ }
+ return true;
+}