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[PATCH] Tweaking loop-invariant.c

From: Evan Cheng <evan dot cheng at apple dot com>
To: gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Thu, 10 Nov 2005 14:18:59 -0800
Subject: [PATCH] Tweaking loop-invariant.c

Hi,

We have found that since builtin calls (e.g. __builtin_ia32_pslldgi128) are not marked pure or const. The tree ssa loop invariant code motion pass does not hoist them out of the loops. We can, however, turn on the RTL LICM pass to move them after they have been lowered into non-calls.

There is a minor bug in find_invariant_insn() which ignores insn which sets subreg. My patch is meant to fix this.

2005-11-10 Evan Cheng <evan.cheng@apple.com>

    * loop-invariant.c (find_invariant_insn): Find more loop
    invariant insns.

Ok?

Evan

Attachment: patch.fsf.4299173.txt
Description: Text document

Follow-Ups:
- Re: [PATCH] Tweaking loop-invariant.c
  - From: Andrew Pinski
- Re: [PATCH] Tweaking loop-invariant.c
  - From: Steven Bosscher
- Re: [PATCH] Tweaking loop-invariant.c
  - From: Ian Lance Taylor

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