[LLVMdev] Iterator to enumerate machine operands

[Chris Lattner]

On Sat, 30 Jul 2005, Tzu-Chien Chiu wrote:
> I want to enumerate all the operands of a machine instruction, but the
> iterator seems to skip everything except virtual registers. Is this by
> design?

Please don't use that, that is SparcV9 specific.  Instead, do something 
like this:

   MachineInstr *MI = ...
   for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i)
     ... MI->getOperand(i) ...

-Chris

> MachineInstr.h
>
> <code>
> template<class MITy, class VTy>
>  class ValOpIterator : public forward_iterator<VTy, ptrdiff_t> {
>    void skipToNextVal() {
>      while (i < MI->getNumOperands() &&
>             !( (MI->getOperand(i).getType() ==
> MachineOperand::MO_VirtualRegister ||
>                 MI->getOperand(i).getType() == MachineOperand::MO_CCRegister)
>                && MI->getOperand(i).getVRegValue() != 0))
>        ++i;
>    }
> </code>
>
>

-Chris

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