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[Bug middle-end/19331] [4.0/4.1 Regression] Inefficient code generated for bitfield assignment
- From: "cvs-commit at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 13 Mar 2005 22:34:18 -0000
- Subject: [Bug middle-end/19331] [4.0/4.1 Regression] Inefficient code generated for bitfield assignment
- References: <20050108182401.19331.giovannibajo@libero.it>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-03-13 22:34 -------
Subject: Bug 19331
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: sayle@gcc.gnu.org 2005-03-13 22:34:07
Modified files:
gcc : ChangeLog tree.c fold-const.c
Log message:
PR middle-end/19331
* tree.c (get_unwidened): Treat CONVERT_EXPR and NOP_EXPR identically.
* fold-const.c (fold_sign_changed_comparison): Likewise.
(fold_binary): Optimize comparisons against widened operands if
the extension is represented by a CONVERT_EXPR, same as a NOP_EXPR.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7828&r2=2.7829
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree.c.diff?cvsroot=gcc&r1=1.467&r2=1.468
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&r1=1.541&r2=1.542
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331