[llvm-dev] setOperands(int, Value*)

[Ryan Taylor via llvm-dev]

Value::replaceAllUsesWith(Value*) ?

On Thu, Feb 13, 2020, 7:24 AM Abid Malik via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hello,
>
> I am trying to reset the operands of instructions. What I am doing is, I
> am finding all Uses of a specific operand in an Instruction and resetting
> it with a new value using "setOperands(int, Value*)". I am doing as:
>
> for (auto vmitr=vm.begin(), vsitr=vs.begin(); vmitr!=vm.end() &&
> vsitr!=vs.end(); vmitr++, vsitr++){
> // I have two *Value ( operands)
>
> for ( auto myitr =(*vsitr)->user_begin(); myitr!=(*vsitr)->user_end();
> ++myitr){
> // Finding the uses of one operand
> for ( int k = 0; k < (*myitr)->getNumOperands(); k++){
> // going through the operands of the Instructions that uses it
> if ((*myitr)->getOperand(k) == *vsitr){
> // Find the operand and its position in the instruction
> (*myitr)->setOperand(k,*vmitr);
> // Replacing it with the other operand value
> }
> }
>
> }
>
> The problem is that it goes into the end loop.
> ps. *vsitr and *vmitr are arguments of different call instructions but
> pointing to the same values.
>
> Thanks
> --
> Abid M. Malik
> ******************************************************
> "I have learned silence from the talkative, toleration from the
> intolerant, and kindness from the unkind"---Gibran
> "Success is not for the chosen few, but for the few who choose" --- John
> Maxwell
> "Being a good person does not depend on your religion or status in life,
> your race or skin color, political views or culture. IT DEPENDS ON HOW GOOD
> YOU TREAT OTHERS"--- Abid
> "The Universe is talking to us, and the language of the Universe is
> mathematics."----Abid
>
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