[llvm-commits] [llvm] r74328 - in /llvm/trunk/lib/Target/X86: AsmPrinter/X86ATTAsmPrinter.cpp X86RegisterInfo.td

[Dan Gohman]

On Jun 26, 2009, at 2:25 PM, Chris Lattner wrote:


> Author: lattner
> Date: Fri Jun 26 16:25:00 2009
> New Revision: 74328
>
> URL: http://llvm.org/viewvc/llvm-project?rev=74328&view=rev
> Log:
> add %rip to the GR64 register class.  Lets avoid allocating it to  
> anything though! :)

Hi Chris,

Is this really a good idea?  %rip isn't really a register,
from the compiler's perspective. It's just assembly syntax
for a special kind of address that happens to resemble register
syntax. Wouldn't it be better to model %rip as one of these
new cool target flags you're working on?

Dan