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Re: PowerPC optimization regression

From: Ian Lance Taylor <iant at google dot com>
To: Joakim Tjernlund <joakim dot tjernlund at transmode dot se>
Cc: gcc at gcc dot gnu dot org
Date: Wed, 08 Dec 2010 06:17:29 -0800
Subject: Re: PowerPC optimization regression
References: <OF67F6DEBE.2B8D710C-ONC12577F3.0034256B-C12577F3.0034D8EA@transmode.se>

Joakim Tjernlund <joakim.tjernlund@transmode.se> writes:

> I have noticed gcc 4.4.5 often produces less optimzed code
> than the old 3.4.6. Below is the latest example. I am
> starting to wonder if I need rebuild gcc 4.4.5 and/or
> add new options to gcc when I compile. Any insight?

This question as stated is not really appropriate for the mailing list
gcc@gcc.gnu.org, which is for discussion about the development of gcc
itself.  It would be appropriate for the mailing list
gcc-help@gcc.gnu.org.

Unfortunately I don't have any good news here.  Building gcc differently
won't help, and it looks like you are using appropriate options.  I
think this is an optimization regression.  I encourage you to file a bug
report about it.

Ian

References:
- PowerPC optimization regression
  - From: Joakim Tjernlund

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