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[Bug tree-optimization/23942] [4.1 Regression] loop problem / testcase takes very long time to compile
- From: "cvs-commit at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 26 Sep 2005 18:45:00 -0000
- Subject: [Bug tree-optimization/23942] [4.1 Regression] loop problem / testcase takes very long time to compile
- References: <20050918110727.23942.marcus@jet.franken.de>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-09-26 18:44 -------
Subject: Bug 23942
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: spop@gcc.gnu.org 2005-09-26 18:44:23
Modified files:
gcc : Makefile.in
Log message:
PR tree-optimization/23942
* Makefile.in (SCEV_H): Depends on PARAMS_H.
* tree-scalar-evolution.c: Include params.h.
(t_bool): New enum.
(follow_ssa_edge, follow_ssa_edge_in_rhs,
follow_ssa_edge_in_condition_phi_branch,
follow_ssa_edge_in_condition_phi, follow_ssa_edge_inner_loop_phi):
Change return type to t_bool. Use a parameter to limit the size of
trees that are walked before stopping
(analyze_evolution_in_loop): Initialize the limit to 0.
(follow_ssa_edge): Give up by returning t_dont_know if the limit
exceeds PARAM_SCEV_MAX_EXPR_SIZE.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/Makefile.in.diff?cvsroot=gcc&r1=1.1541&r2=1.1542
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23942