Hello, I am writing a MachineFunctionPass that inspects the generated machine code, and examines each opcode and its corresponding operands. If the 'instruction + operands' match a particular sequence, then the pass should replace them with a fixed instruction + operands sequence. I tried using MachineInstr's getOpcode and getOperand functions but the pass didn't work as expected. Kindly tell me how to proceed or point to appropriate references. Thank you ! -- Regards, Sachin -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20141002/1bca86b0/attachment.html>
Dear Sachin, Your description of the problem contains too few details; no one will be able to diagnose the problem you're having. You need to provide more information on what, exactly, is not working as you expected. Regards, John Criswell On 10/2/14, 5:11 PM, sachin arora wrote:> Hello, > > I am writing a MachineFunctionPass that inspects the generated machine > code, and examines each opcode and its corresponding operands. If the > 'instruction + operands' match a particular sequence, then the pass > should replace them with a fixed instruction + operands sequence. I > tried using MachineInstr's getOpcode and getOperand functions but the > pass didn't work as expected. > > Kindly tell me how to proceed or point to appropriate references. > Thank you ! > > -- > Regards, > Sachin > > > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev-- John Criswell Assistant Professor Department of Computer Science, University of Rochester http://www.cs.rochester.edu/u/criswell -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20141002/34d4e444/attachment.html>
Respected Dr. Criswell, My problem is that the output of following code looks nothing like any opcode: *for(MachineBasicBlock::iterator I = BB->begin(); I != BB->end(); ) { MachineInstr *mi = I; int op = mi->getOpcode(); std::cout << op << '\t'; }* I need to identify specific instructions in my MachineFunctionPass and I was hoping that I can do that by using *getOpcode(). *I am kinda stuck at this point. Kindly guide me ! Thank you ! On Thu, Oct 2, 2014 at 4:37 PM, John Criswell <jtcriswel at gmail.com> wrote:> Dear Sachin, > > Your description of the problem contains too few details; no one will be > able to diagnose the problem you're having. You need to provide more > information on what, exactly, is not working as you expected. > > Regards, > > John Criswell > > > On 10/2/14, 5:11 PM, sachin arora wrote: > > Hello, > > I am writing a MachineFunctionPass that inspects the generated machine > code, and examines each opcode and its corresponding operands. If the > 'instruction + operands' match a particular sequence, then the pass should > replace them with a fixed instruction + operands sequence. I tried using > MachineInstr's getOpcode and getOperand functions but the pass didn't work > as expected. > > Kindly tell me how to proceed or point to appropriate references. Thank > you ! > > -- > Regards, > Sachin > > > _______________________________________________ > LLVM Developers mailing listLLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.eduhttp://lists.cs.uiuc.edu/mailman/listinfo/llvmdev > > > > -- > John Criswell > Assistant Professor > Department of Computer Science, University of Rochesterhttp://www.cs.rochester.edu/u/criswell > >-- Regards, Sachin -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20141002/18d0aea2/attachment.html>
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