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Re: Volatile bug in unmaintained GCC 436 and 447

From: "Paulo J. Matos" <paulo at matos-sorge dot com>
To: gcc at gcc dot gnu dot org
Date: Thu, 12 Jul 2012 17:22:06 +0100
Subject: Re: Volatile bug in unmaintained GCC 436 and 447
References: <jtma9o$hgc$1@dough.gmane.org> <CAFiYyc07RVoHq+KECX_rouWg_0Q5wr1Y86KdHs3xSWnVujErBg@mail.gmail.com>

On 12/07/12 12:19, Richard Guenther wrote:


Look into the tree dumps and look where the ={v} disappears.  That
will point to the pass that breaks it and eventually help track down the
fixing patch.

Thanks for the tip Richard. Tracked it down to PHI prop pass in tree-ssa-phiprop.c, not yet what code fix occurred in 4.5.0.

--
PMatos

References:
- Volatile bug in unmaintained GCC 436 and 447
  - From: Paulo J. Matos
- Re: Volatile bug in unmaintained GCC 436 and 447
  - From: Richard Guenther

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