search for: overflowblock

...before any code is run (specifically, I cannot allow any stack operations). Because of this, I figured a good place to do this code insertion is in EmitPrologue. I also, at this time, create the block that handles the error case. // create a new block for the overflow handling code MF.overflowBlock = MF.CreateMachineBasicBlock(); MachineFunction::iterator obinsert = MF.begin(); MF.addToMBBNumbering(MF.overflowBlock); MF.push_back(MF.overflowBlock); // on overflow jump to a new block to handle overflow BuildMI(MBB, MBBI, DL, TII.get(X86::JAE_4)).addMBB(MF.overflow...