llvm dev - Apr 2019 - How can I get which are the instructions are using this register(%4:gpr32)

Hi All,

I have instruction like below
%4:gpr32 = MOVi32imm 6553600

Here MI->getOperand(0).isOnRegUseList()  API is returning true.
But I want to know that which are the instructions are using this
register(%4:gpr32) in current BB and Dominator Tree Basic Blocks.

How can I get which are the instructions are using this register(%4:gpr32)?

Could any one please give your suggestions.

Thanks & Regards,
Ramakota.


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Hi Ramakota,

On Mon, 8 Apr 2019 at 14:42, Ramakota Reddy via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> But I want to know that which are the instructions are using this
register(%4:gpr32) in current BB and Dominator Tree Basic Blocks.
>
> How can I get which are the instructions are using this register(%4:gpr32)?
MachineRegisterInfo::use_begin and related functions (especially
use_instructions) let you iterate through the uses of a virtual
register. Physical registers are a lot harder though, so I hope you
don't need that.

Cheers.

Tim.