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[Bug tree-optimization/67815] Optimize const1 * copysign (const2, y) into copysign (const1 * const2, y) if const1 > 0 or -copysign (const1 * const2, y) if const1 < 0
- From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 14 Oct 2015 12:54:35 +0000
- Subject: [Bug tree-optimization/67815] Optimize const1 * copysign (const2, y) into copysign (const1 * const2, y) if const1 > 0 or -copysign (const1 * const2, y) if const1 < 0
- Auto-submitted: auto-generated
- References: <bug-67815-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67815
--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Oct 14 12:54:03 2015
New Revision: 228809
URL: https://gcc.gnu.org/viewcvs?rev=228809&root=gcc&view=rev
Log:
PR tree-optimization/67815
* tree-ssa-reassoc.c (attempt_builtin_copysign): New function.
(reassociate_bb): Call it.
* gcc.dg/tree-ssa/reassoc-39.c: New test.
* gcc.dg/tree-ssa/reassoc-40.c: New test.
* gcc.dg/tree-ssa/reassoc-41.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/reassoc-39.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/reassoc-40.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/reassoc-41.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-reassoc.c