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Re: RFC -- update_equiv_regs and friends

To: Joern Rennecke <amylaar at redhat dot com>
Subject: Re: RFC -- update_equiv_regs and friends
From: Richard Henderson <rth at redhat dot com>
Date: Thu, 1 Mar 2001 18:43:38 -0800
Cc: John Wehle <john at feith dot com>, law at redhat dot com, gcc at gcc dot gnu dot org
References: <200103020227.VAA00415@jwlab.FEITH.COM> <200103020236.f222a8i11812@phal.cambridge.redhat.com>

On Fri, Mar 02, 2001 at 02:36:08AM +0000, Joern Rennecke wrote:
> >   2) Change update_equiv_regs so it doesn't promote a REG_EQUAL note
> >      to a REG_EQUIV if there's a register mentioned.
> 
> Promoting REG_EQUAL to REG_EQUIV is an important optimization for some
> procesors for sums involving the stack pointer, the frame pointer,
> virtual_stack_var_rtx and the argument pointer.

I think he meant "pseudo register mentioned", which is what
Jeff had being talking about.


r~

References:
- Re: RFC -- update_equiv_regs and friends
  - From: John Wehle
- Re: RFC -- update_equiv_regs and friends
  - From: Joern Rennecke

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