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Re: [patch] genrecog.c: Simplify comparisons against small constants in insn-recog.c.

From: Richard Henderson <rth at redhat dot com>
To: Roger Sayle <roger at eyesopen dot com>
Cc: Kazu Hirata <kazu at cs dot umass dot edu>, gcc-patches at gcc dot gnu dot org
Date: Fri, 30 Jan 2004 14:44:24 -0800
Subject: Re: [patch] genrecog.c: Simplify comparisons against small constants in insn-recog.c.
References: <20040130011912.GA11790@redhat.com> <Pine.LNX.4.44.0401300611150.32111-100000@www.eyesopen.com>

On Fri, Jan 30, 2004 at 06:38:53AM -0700, Roger Sayle wrote:
> Isn't this simply an extension of the cleanup
> "GET_CODE (x) == CONST_INT && XWINT (x, 0) == 0" to "x == const0_rtx"?

Yes, it is.  I suppose for that, we might as well be consistent.

> It would also be nice if we could somehow mark the const_int_rtx array
> as const or unchanging once initialized?

I can't think of any way.


r~

Follow-Ups:
- Re: [patch] genrecog.c: Simplify comparisons against small constants in insn-recog.c.
  - From: Dale Johannesen
- Re: [patch] genrecog.c: Simplify comparisons against small constants in insn-recog.c.
  - From: Ian Lance Taylor
- Re: [patch] genrecog.c: Simplify comparisons against smallconstants in insn-recog.c.
  - From: Kazu Hirata

References:
- Re: [patch] genrecog.c: Simplify comparisons against small constants in insn-recog.c.
  - From: Richard Henderson
- Re: [patch] genrecog.c: Simplify comparisons against small constantsin insn-recog.c.
  - From: Roger Sayle

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