This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug middle-end/36262] [4.3 Regression] Extreme memory usage of VRP compared to older versions
- 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: 31 May 2008 13:01:58 -0000
- Subject: [Bug middle-end/36262] [4.3 Regression] Extreme memory usage of VRP compared to older versions
- References: <bug-36262-1532@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #7 from rguenth at gcc dot gnu dot org 2008-05-31 13:01 -------
Subject: Bug 36262
Author: rguenth
Date: Sat May 31 13:01:10 2008
New Revision: 136237
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=136237
Log:
2008-05-31 Richard Guenther <rguenther@suse.de>
PR tree-optimization/34244
* fold-const.c (tree_expr_nonnegative_warnv_p): Do not ask VRP.
(tree_expr_nonzero_warnv_p): Likewise.
* tree-vrp.c (vrp_expr_computes_nonnegative): Call
ssa_name_nonnegative_p.
(vrp_expr_computes_nonzero): Call ssa_name_nonzero_p.
(extract_range_from_unary_expr): Use vrp_expr_computes_nonzero,
not tree_expr_nonzero_warnv_p.
PR tree-optimization/36262
Revert
2007-11-29 Zdenek Dvorak <ook@ucw.cz>
PR tree-optimization/34244
* tree-vrp.c (adjust_range_with_scev): Clear scev cache.
(record_numbers_of_iterations): New function.
(execute_vrp): Cache the numbers of iterations of loops.
* tree-scalar-evolution.c (scev_reset_except_niters):
New function.
(scev_reset): Use scev_reset_except_niters.
* tree-scalar-evolution.h (scev_reset_except_niters): Declare.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/tree-scalar-evolution.c
trunk/gcc/tree-scalar-evolution.h
trunk/gcc/tree-vrp.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36262