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
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