SystemZInstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
MachineBasicBlock *FBB,
const SmallVectorImpl<MachineOperand> &Cond) const {
- assert(0 && "Implement branches!");
+ // FIXME this should probably have a DebugLoc operand
+ DebugLoc dl = DebugLoc::getUnknownLoc();
+ // Shouldn't be a fall through.
+ assert(TBB && "InsertBranch must not be told to insert a fallthrough");
+ assert((Cond.size() == 1 || Cond.size() == 0) &&
+ "SystemZ branch conditions have one component!");
+
+ if (Cond.empty()) {
+ // Unconditional branch?
+ assert(!FBB && "Unconditional branch with multiple successors!");
+ BuildMI(&MBB, dl, get(SystemZ::JMP)).addMBB(TBB);
+ return 1;
+ }
+
+ // Conditional branch.
+ unsigned Count = 0;
+ SystemZCC::CondCodes CC = (SystemZCC::CondCodes)Cond[0].getImm();
+ BuildMI(&MBB, dl, getBrCond(CC)).addMBB(TBB);
+ ++Count;
- return 0;
+ if (FBB) {
+ // Two-way Conditional branch. Insert the second branch.
+ BuildMI(&MBB, dl, get(SystemZ::JMP)).addMBB(FBB);
+ ++Count;
+ }
+ return Count;
}
const TargetInstrDesc&