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Re: Which optimization levels affect gimple?

From: Diego Novillo <dnovillo at redhat dot com>
To: "Paulo J. Matos" <pocm at soton dot ac dot uk>
Cc: gcc at gcc dot gnu dot org
Date: Mon, 29 Jan 2007 02:03:56 -0500
Subject: Re: Which optimization levels affect gimple?
References: <11b141710701240944i520edabchaa2fbb25cb278a47@mail.gmail.com> <45B7AEE2.30605@redhat.com> <11b141710701281503y3fb5f1c6v3b74c19d71e8e667@mail.gmail.com>

Paulo J. Matos wrote on 01/28/07 18:03:

On 1/24/07, Diego Novillo <dnovillo@redhat.com> wrote:
Paulo J. Matos wrote on 01/24/07 12:44:
check what kind of gimple code you get with -fdump-tree-gimple and
-O0 and -O3 have different results,
-fdump-tree-gimple is the first dump *before* any optimizations occur.
To see the effect of all the GIMPLE optimizations you should use
-fdump-tree-optimized.
So the dump-tree-optimized will also return GIMPLE? a subset of... GIMPLE?

No, that's back to GENERIC. During out-of-ssa we recombine GIMPLE expressions into GENERIC because of limitations in the way RTL expansion works. In the future, we may go from GIMPLE SSA directly into RTL, so this may change.

References:
- Which optimization levels affect gimple?
  - From: Paulo J. Matos
- Re: Which optimization levels affect gimple?
  - From: Diego Novillo
- Re: Which optimization levels affect gimple?
  - From: Paulo J. Matos

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