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[Bug tree-optimization/64410] gcc 25% slower than clang 3.5 for adding complex numbers
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 09 Jan 2015 11:15:29 +0000
- Subject: [Bug tree-optimization/64410] gcc 25% slower than clang 3.5 for adding complex numbers
- Auto-submitted: auto-generated
- References: <bug-64410-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64410
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Jan 9 11:14:55 2015
New Revision: 219380
URL: https://gcc.gnu.org/viewcvs?rev=219380&root=gcc&view=rev
Log:
2015-01-09 Richard Biener <rguenther@suse.de>
PR tree-optimization/64410
* tree-ssa.c (non_rewritable_lvalue_p): Allow REALPART/IMAGPART_EXPR
on the LHS.
(execute_update_addresses_taken): Deal with that.
* tree-ssa-forwprop.c (pass_forwprop::execute): Use component-wise
loads/stores for complex variables.
* g++.dg/vect/pr64410.cc: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/vect/pr64410.cc
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-forwprop.c
trunk/gcc/tree-ssa.c