llvm dev - Feb 2007 - [LLVMdev] Reference to recently created move

Hey, guys, I am creating some move instructions with 
MRegisterInfo::copyRegToReg. How do I get a pointer to the instruction 
that I just created? Is there a way to do something like:

// mbb is MachineBasicBlock, reg_info is MRegisterInfo

MachineBasicBlock::iterator iter = mbb.getFirstTerminator();

reg_info->copyRegToReg(mbb, iter, dst, src, rc);

iter--; (???)

MachineInstr * new_move_instruction = iter; (???)

This does not work though.

Thank you,

Fernando

copyRegToReg() always insert the move instruction before "iter". Just
use prior(iter) after the insertion to reference the newly created  
move instruction.

Evan
On Feb 21, 2007, at 11:17 PM, Fernando Magno Quintao Pereira wrote:
>
> Hey, guys, I am creating some move instructions with
> MRegisterInfo::copyRegToReg. How do I get a pointer to the instruction
> that I just created? Is there a way to do something like:
>
> // mbb is MachineBasicBlock, reg_info is MRegisterInfo
>
> MachineBasicBlock::iterator iter = mbb.getFirstTerminator();
>
> reg_info->copyRegToReg(mbb, iter, dst, src, rc);
>
> iter--; (???)
>
> MachineInstr * new_move_instruction = iter; (???)
>
> This does not work though.
>
> Thank you,
>
> Fernando
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

Thanks, Evan.

     Actually, the previous code is working. I had got a segfault for some 
reason, but it was not because of the dereferencing. I have figured it 
out now.

Fernando
> copyRegToReg() always insert the move instruction before "iter".
Just
> use prior(iter) after the insertion to reference the newly created
> move instruction.
>
> Evan
> On Feb 21, 2007, at 11:17 PM, Fernando Magno Quintao Pereira wrote:
>
>>
>> Hey, guys, I am creating some move instructions with
>> MRegisterInfo::copyRegToReg. How do I get a pointer to the instruction
>> that I just created? Is there a way to do something like:
>>
>> // mbb is MachineBasicBlock, reg_info is MRegisterInfo
>>
>> MachineBasicBlock::iterator iter = mbb.getFirstTerminator();
>>
>> reg_info->copyRegToReg(mbb, iter, dst, src, rc);
>>
>> iter--; (???)
>>
>> MachineInstr * new_move_instruction = iter; (???)
>>
>> This does not work though.
>>
>> Thank you,
>>
>> Fernando
>> _______________________________________________
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>