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Hi all, I am really stumped on a problem for long. I could not figure out why. That is why i am here. OK, here is the problem: I tried to insert a MachineBasicBlock into a function. Here is the code snippet: // insert a machine basic block with the error_label into MF and before I // Pred is the predecessor of the block to be inserted // the new basic block is inserted right before I void X86CFIOptPass::insertBasicBlockBefore(MachineFunction &MF, MachineBasicBlock *Pred, MachineFunction::iterator I){...

...> >> I am really stumped on a problem for long. I could not figure out why. >> That is why i am here. OK, here is the problem: >> I tried to insert a MachineBasicBlock into a function. Here is the code >> snippet: >> >> // insert a machine basic block with the error_label into MF and >> before I >> // Pred is the predecessor of the block to be inserted >> // the new basic block is inserted right before I >> void X86CFIOptPass::insertBasicBlockBefore(MachineFunction&MF, >> MachineBasicBlock *Pred, >>...

...s and custom C++ code (I guess that will be X86DAGToDAGISel::Select(SDValue)) that deal with selection. The runtime checks I want to add concern indirect jumps. So for example for all calls that jump to register values like call eax I want to insert a check ... (some test) ...# perform test jne error_label # jump if test fails call eax # otherwise execute original call So the check is a sequence of instructions before the call instruction. Is it possible to do that at the selection level? If yes, could you give a simple example or some hint how it would be done? I only find example...

...AGISel::Select(SDValue)) that deal with selection. > > The runtime checks I want to add concern indirect jumps. So for > example for > all calls that jump to register values like > > call eax > > I want to insert a check > > ... (some test) ...# perform test > jne error_label # jump if test fails > call eax # otherwise execute original call > > So the check is a sequence of instructions before the call > instruction. > > Is it possible to do that at the selection level? If yes, could you > give a > simple example or some hint...