This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug tree-optimization/19792] Missed optimizations due to signedness in the way
- 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: 4 May 2006 13:57:08 -0000
- Subject: [Bug tree-optimization/19792] Missed optimizations due to signedness in the way
- References: <bug-19792-5009@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 2006-05-04 13:57 -------
Subject: Bug 19792
Author: rguenth
Date: Thu May 4 13:56:52 2006
New Revision: 113527
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=113527
Log:
2006-05-04 Richard Guenther <rguenther@suse.de>
PR tree-optimization/14287
PR tree-optimization/14844
PR tree-optimization/19792
PR tree-optimization/21608
PR tree-optimization/27090
* tree-ssa-pre.c (try_combine_conversion): New function.
(compute_avail): After constructing the value-handle
expression, use try_combine_conversion to combine NOP_EXPRs
with previous value-handle expressions and use the result if it
is available.
* gcc.dg/tree-ssa/ssa-fre-1.c: New testcase.
* gcc.dg/tree-ssa/ssa-fre-2.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-3.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-4.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-5.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-1.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-2.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-3.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-4.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-5.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-pre.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19792