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[Bug middle-end/19988] [4.3/4.4/4.5 Regression] pessimizes fp multiply-add/subtract combo
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 21 Jan 2010 12:15:59 -0000
- Subject: [Bug middle-end/19988] [4.3/4.4/4.5 Regression] pessimizes fp multiply-add/subtract combo
- References: <bug-19988-9955@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #24 from rguenth at gcc dot gnu dot org 2010-01-21 12:15 -------
Subject: Bug 19988
Author: rguenth
Date: Thu Jan 21 12:15:40 2010
New Revision: 156152
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=156152
Log:
2010-01-21 Richard Guenther <rguenther@suse.de>
PR middle-end/19988
* fold-const.c (negate_expr_p): Pretend only negative
real constants are easily negatable.
* gcc.dg/pr19988.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr19988.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19988