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Re: [Patch]: Fix pb in libcall_dead_p

To: Stephane Carrez <Stephane dot Carrez at worldnet dot fr>
Subject: Re: [Patch]: Fix pb in libcall_dead_p
From: Richard Henderson <rth at cygnus dot com>
Date: Tue, 27 Jun 2000 14:55:36 -0700
Cc: gcc-patches at gcc dot gnu dot org
References: <39592E8D.8EEF907A@worldnet.fr> <20000627140032.A15563@cygnus.com> <39593E15.F4F8D6AD@worldnet.fr>

On Wed, Jun 28, 2000 at 01:51:49AM +0200, Stephane Carrez wrote:
> This is what is generated and I've observed the same for sparc.
> For sparc, the first REG_RETVAL is removed by the life analysis pass.

Got a test case?  This _really_ shouldn't be happening.

> Because I don't have 32-bit registers and I've implemented 32-bit moves
> by using a 16-bit scratch register.  The result is much more efficient than
> spliting the move into pieces.

Except that one can always split a double-word move after reload without
requiring a scratch register.  


r~

Follow-Ups:
- Re: [Patch]: Fix pb in libcall_dead_p
  - From: Stephane Carrez

References:
- [Patch]: Fix pb in libcall_dead_p
  - From: Stephane Carrez
- Re: [Patch]: Fix pb in libcall_dead_p
  - From: Richard Henderson
- Re: [Patch]: Fix pb in libcall_dead_p
  - From: Stephane Carrez

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