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
                  
                
              
            
          
        
             
      
      
      
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    --  John Criswell Assistant Professor Department of Computer Science, University of Rochester http://www.cs.rochester.edu/u/criswell   ">

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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@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


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--   
John Criswell  
Assistant Professor  
Department of Computer Science, University of Rochester  
http://www.cs.rochester.edu/u/criswell



--
Regards,
Sachin