[PATCH] D15614: TargetRegisterInfo: Add getRegAsmName()

[Eric Christopher via llvm-commits]

echristo added a comment.

In http://reviews.llvm.org/D15614#322249, @tstellarAMD wrote:

> In http://reviews.llvm.org/D15614#322025, @echristo wrote:
>
> > Seems like extra complexity versus just doing what the PPC port did?
>
>
> How did the PPC port solve this?  I haven't found anything in PPCISelLowering::getRegForInlineAsmConstraint() that seems to work-around the issue.


They did it via this:

  class PPCReg<string n> : Register<n> {
    let Namespace = "PPC";
  }
  
  // We identify all our registers with a 5-bit ID, for consistency's sake.                                                                                                           
  
  // GPR - One of the 32 32-bit general-purpose registers                                                                                                                             
  class GPR<bits<5> num, string n> : PPCReg<n> {
    let HWEncoding{4-0} = num;
  }

Where it just sets the register rather than using the default. Take a look at lib/Target/PPCRegisterInfo.td.


http://reviews.llvm.org/D15614