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[Patch, fortran] PR fortran/38184 invariant RESHAPE not expanded if SOURCE is empty.

From: Mikael Morin <mikael dot morin at tele2 dot fr>
To: correctifs gcc <gcc-patches at gcc dot gnu dot org>, gfortran <fortran at gcc dot gnu dot org>
Date: Wed, 19 Nov 2008 22:24:03 +0100
Subject: [Patch, fortran] PR fortran/38184 invariant RESHAPE not expanded if SOURCE is empty.

Hello,

this is only a missed optimization, but it is obvious on the other hand,
and it should have a limited impact (empty arrays only).

regression-tested on x86_64-unknown-linux-gnu, ok for 4.4? 4.3 as well?

Mikael



2008-11-19  Mikael Morin  <mikael.morin@tele2.fr>

	PR fortran/38184
	* simplify.c (is_constant_array_expr): Return true instead of false
	if the array constructor is empty

2008-11-19  Mikael Morin  <mikael.morin@tele2.fr>

	PR fortran/38184
	* gfortran.dg/reshape_empty_1.f03: New test.

Attachment: pr38184_02.diff
Description: Text document

Follow-Ups:
- Re: [Patch, fortran] PR fortran/38184 invariant RESHAPE not expanded if SOURCE is empty.
  - From: Tobias Burnus

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