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[Bug tree-optimization/15310] [tree-ssa] Optimize an addition in a bit field
- 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: 16 Aug 2004 16:42:29 -0000
- Subject: [Bug tree-optimization/15310] [tree-ssa] Optimize an addition in a bit field
- References: <20040506083745.15310.kazu@cs.umass.edu>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2004-08-16 16:42 -------
Subject: Bug 15310
CVSROOT: /cvs/gcc
Module name: gcc
Branch: gcc-3_4-rhl-branch
Changes by: jakub@gcc.gnu.org 2004-08-16 16:42:16
Modified files:
gcc : ChangeLog expr.c simplify-rtx.c
gcc/testsuite : ChangeLog
Added files:
gcc/testsuite/gcc.c-torture/execute: 20040629-1.c 20040705-1.c
20040705-2.c 20040709-1.c
20040709-2.c
Log message:
2004-07-09 Jakub Jelinek <jakub@redhat.com>
* expr.c (expand_assignment): Reenable bitfield += optimizations.
Use alias set 0 for memory, do proper mode calculations and adjust
address for memories.
* gcc.c-torture/execute/20040709-1.c: New test.
* gcc.c-torture/execute/20040709-2.c: New test.
2004-07-05 Jakub Jelinek <jakub@redhat.com>
* expr.c (expand_assignment): Disable the bitfield += optimizations.
* gcc.c-torture/execute/20040629-1.c (FIELDS1, FIELDS2): Define to
nothing if not yet defined. Use it in b, c and d type definitions.
* gcc.c-torture/execute/20040705-1.c: New test.
* gcc.c-torture/execute/20040705-2.c: New test.
2004-07-01 Jakub Jelinek <jakub@redhat.com>
* expr.c (expand_assignment): Optimize bitfld += cst for 1 bit
bitfields as well. STRIP_NOPS from src operand and PLUS_EXPR's
first operand. Don't optimize if the bitfield is volatile.
2004-06-29 Jakub Jelinek <jakub@redhat.com>
* simplify-rtx.c (simplify_binary_operation): Simplify
((A & N) + B) & M -> (A + B) & M if M is pow2 minus 1 constant and
N has at least all bits in M set as well.
PR tree-optimization/15310
* expr.c (expand_assignment): Optimize += or -= on a bit field in
most significant bits.
* gcc.c-torture/execute/20040629-1.c: New test.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-rhl-branch&r1=2.2326.2.399.2.26&r2=2.2326.2.399.2.27
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/expr.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-rhl-branch&r1=1.615.4.11.2.2&r2=1.615.4.11.2.3
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/simplify-rtx.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-rhl-branch&r1=1.172.4.1.2.1&r2=1.172.4.1.2.2
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-rhl-branch&r1=1.3389.2.170.2.13&r2=1.3389.2.170.2.14
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.c-torture/execute/20040629-1.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-rhl-branch&r1=NONE&r2=1.2.14.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.c-torture/execute/20040705-1.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-rhl-branch&r1=NONE&r2=1.1.14.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.c-torture/execute/20040705-2.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-rhl-branch&r1=NONE&r2=1.1.14.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.c-torture/execute/20040709-1.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-rhl-branch&r1=NONE&r2=1.1.12.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.c-torture/execute/20040709-2.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-rhl-branch&r1=NONE&r2=1.1.12.1
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15310