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Re: [PATCH][RFC] Add PAREN_EXPR, make flag_associative_math the default for Fortran

From: Paolo Bonzini <bonzini at gnu dot org>
To: Richard Guenther <rguenther at suse dot de>
Cc: Tobias Schlüter <tobias dot schlueter at physik dot uni-muenchen dot de>, gcc-patches at gcc dot gnu dot org, fortran at gcc dot gnu dot org
Date: Thu, 03 Jan 2008 18:41:06 +0100
Subject: Re: [PATCH][RFC] Add PAREN_EXPR, make flag_associative_math the default for Fortran
Newsgroups: gmane.comp.gcc.fortran, gmane.comp.gcc.patches
References: <Pine.LNX.4.64.0801021537230.3891@zhemvz.fhfr.qr> <477BCFA7.2030806@physik.uni-muenchen.de> <Pine.LNX.4.64.0801031534040.3891@zhemvz.fhfr.qr>

so probably PAREN_EXPR needs to be ignored in some places, in this case
it needs to be handled like a simple copy.

CCP (unlike VRP) is one of these. Associativity does not change the "constant-ness" of a value.

Paolo

References:
- [PATCH][RFC] Add PAREN_EXPR, make flag_associative_math the default for Fortran
  - From: Richard Guenther
- Re: [PATCH][RFC] Add PAREN_EXPR, make flag_associative_math the default for Fortran
  - From: Tobias Schlüter
- Re: [PATCH][RFC] Add PAREN_EXPR, make flag_associative_math the default for Fortran
  - From: Richard Guenther

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