http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54717
Bug #: 54717
Summary: Runtime regression: polyhedron test "rnflow" degraded
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: sergos....@gmail.com
commit 024fee2c369096e6fe6cde620243df5843893004
Author: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu Sep 13 12:43:58 2012 +0000
2012-09-13 Richard Guenther <rguent...@suse.de>
* tree-ssa-sccvn.h (enum vn_kind): New.
(vn_get_stmt_kind): Likewise.
* tree-ssa-sccvn.c (vn_get_stmt_kind): New function, adjust
ADDR_EXPR handling.
(visit_use): Use it.
* tree-ssa-pre.c (compute_avail): Likewise, simplify further.
* gcc.dg/tree-ssa/ssa-fre-37.c: New testcase.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@191253
138bc75d-0d04-0410-961f-82ee72b054a4
caused a 20% degradation on polyhedron's "rnflow"
commit 780bedc1ccae5ae85fb99afed8a1ac1cc598121b
Geometric Mean Execution Time = 18.28 seconds
commit 024fee2c369096e6fe6cde620243df5843893004
Geometric Mean Execution Time = 24.82 seconds
compilation options used:
gfortran -march=native -ffast-math -funroll-loops -O3 -ftree-vectorize %n.f90
-static -o %n
