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[Bug c++/41094] Erroneous optimization of pow() with -ffast-math
- 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: 24 Aug 2009 09:52:17 -0000
- Subject: [Bug c++/41094] Erroneous optimization of pow() with -ffast-math
- References: <bug-41094-1764@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #4 from rguenth at gcc dot gnu dot org 2009-08-24 09:52 -------
Subject: Bug 41094
Author: rguenth
Date: Mon Aug 24 09:52:03 2009
New Revision: 151051
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=151051
Log:
2009-08-24 Richard Guenther <rguenther@suse.de>
PR middle-end/41094
* builtins.c (fold_builtin_pow): Fold pow(pow(x,y),z) to
pow(x,y*z) only if x is nonnegative.
* gcc.dg/torture/pr41094.c: New testcase.
* gcc.dg/torture/builtin-power-1.c: Adjust.
* gcc.dg/builtins-10.c: Likewise.
Added:
branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/torture/pr41094.c
Modified:
branches/gcc-4_4-branch/gcc/ChangeLog
branches/gcc-4_4-branch/gcc/builtins.c
branches/gcc-4_4-branch/gcc/testsuite/ChangeLog
branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/builtins-10.c
branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/torture/builtin-power-1.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41094