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Re: gcc/gcc ChangeLog tree-ssa-loop-im.c

From: Zdenek Dvorak <rakdver at atrey dot karlin dot mff dot cuni dot cz>
To: Andrew Pinski <pinskia at physics dot uc dot edu>
Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>, rakdver at gcc dot gnu dot org
Date: Thu, 12 May 2005 14:35:15 +0200
Subject: Re: gcc/gcc ChangeLog tree-ssa-loop-im.c
References: <20050510200428.9168.qmail@sourceware.org> <c684f41514d1cb7b45bb5a70bd7594e1@physics.uc.edu> <20050512113742.GA26487@atrey.karlin.mff.cuni.cz> <7fdd706e8f3bd19db512e144bb77f295@physics.uc.edu>

Hello,

> >>This patch causes a bootstrap failure on powerpc-darwin.
> >>The problem is that we get the following differences for emit-rtl.c
> >>between stage1 and stage2, this usually means that the hastable is
> >>traversed but the hastable is not stable across the compiling:
> >
> >I cannot reproduce the problem (using powerpc-linux and
> >powerpc64-linux).
> 
> That is because it does not show up all the time and you were just
> getting lucky that the memory addresses were the same.  Diego
> could reproduce this on and off on both x86_64 and x86.

this looks like the patch uses some unitialized memory.  I will try
valgrind on i686, perhaps it catches something.

Zdenek

Follow-Ups:
- Re: gcc/gcc ChangeLog tree-ssa-loop-im.c
  - From: Andrew Pinski

References:
- Re: gcc/gcc ChangeLog tree-ssa-loop-im.c
  - From: Andrew Pinski
- Re: gcc/gcc ChangeLog tree-ssa-loop-im.c
  - From: Zdenek Dvorak
- Re: gcc/gcc ChangeLog tree-ssa-loop-im.c
  - From: Andrew Pinski

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