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Re: [patch] for PR 32729

From: "Richard Guenther" <richard dot guenther at gmail dot com>
To: "Zdenek Dvorak" <rakdver at kam dot mff dot cuni dot cz>
Cc: gcc-patches at gcc dot gnu dot org
Date: Thu, 12 Jul 2007 11:26:08 +0200
Subject: Re: [patch] for PR 32729
References: <20070712073517.GA23979@kam.mff.cuni.cz>

On 7/12/07, Zdenek Dvorak <rakdver@kam.mff.cuni.cz> wrote:

Hello,

can_duplicate_block_p prevents us from duplicating a basic block if it has a fallthru edge
going to the exit block (which in the testcase for this PR prevents a loop from being unrolled).
However, there does not seem to be a reason for this restriction; even if there is a problem
with several fallthru edges to exit, cfg_layout_finalize should fix it.

Bootstrapped & regtested on i686.

This is ok.

Thanks,
Richard.

Zdenek

        PR rtl-optimization/32729
        * cfghooks.c (can_duplicate_block_p): Do not forbid duplicating blocks
        that fallthru to exit.

References:
- [patch] for PR 32729
  - From: Zdenek Dvorak

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