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[Bug middle-end/29256] [4.2 regression] loop performance regression
- From: "rakdver at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 6 Oct 2006 19:32:16 -0000
- Subject: [Bug middle-end/29256] [4.2 regression] loop performance regression
- References: <bug-29256-12262@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #17 from rakdver at gcc dot gnu dot org 2006-10-06 19:32 -------
Subject: Bug 29256
Author: rakdver
Date: Fri Oct 6 19:32:04 2006
New Revision: 117513
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=117513
Log:
PR middle-end/29256
* tree-ssa-loop-ivopts.c (determine_base_object): Handle pointers
casted to integer type.
(get_address_cost): Decrease cost of [symbol + index] addressing modes
if they are significantly more expensive than [reg + index] ones.
* gcc.dg/tree-ssa/loop-19.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/loop-19.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-loop-ivopts.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29256