[LLVMdev] Need guidance regarding MachineFunctionPass

[sachin arora]

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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