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[patch] struct resources: remove unch_memory member

From: Steven Bosscher <stevenb dot gcc at gmail dot com>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Cc: Eric Botcazou <ebotcazou at adacore dot com>
Date: Sat, 11 May 2013 01:22:39 +0200
Subject: [patch] struct resources: remove unch_memory member

Hello,

This unch_memory in struct resources is a left-over from
RTX_UNCHANGING_P, but it looks like the change-over to MEM_READONLY_P
was done incorrectly: The resource_conflicts_p code now reports
conflicts for insns reading readonly memory and insns reading "normal"
memory or no memory at all.

Spotted by checking why reorg.c failed to fill some slots that my
sched-deps based delay slot scheduler managed to fill.

Bootstrapped&tested on sparc64-unknown-linux-gnu. OK for trunk?

Ciao!
Steven

Attachment: no_unch_mem.diff.txt
Description: Text document

Follow-Ups:
- Re: [patch] struct resources: remove unch_memory member
  - From: Richard Biener
- Re: [patch] struct resources: remove unch_memory member
  - From: Eric Botcazou

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