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From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/43627] [4.5 Regression] slow compilation (tree canonical iv takes 75%)
Date: Fri, 02 Apr 2010 14:23:00 -0000 [thread overview]
Message-ID: <20100402142322.23554.qmail@sourceware.org> (raw)
In-Reply-To: <bug-43627-6642@http.gcc.gnu.org/bugzilla/>
------- Comment #13 from rguenth at gcc dot gnu dot org 2010-04-02 14:23 -------
Testcase for that:
MODULE hfx_compression_core_methods
IMPLICIT NONE
INTEGER, PARAMETER :: int_8=8
CONTAINS
SUBROUTINE ints2bits_3(Ndata,packed_data,full_data)
INTEGER, INTENT(IN) :: Ndata
INTEGER(KIND=int_8), INTENT(OUT) :: packed_data(*)
INTEGER(KIND=int_8), INTENT(IN) :: full_data(*)
INTEGER, PARAMETER :: Nbits = 3
INTEGER :: idata, ipack, kdata, Ndata_rep
INTEGER(KIND=int_8) :: data_tmp, pack_tmp
idata=0
ipack=0
Ndata_rep=(Ndata/2)*2
DO kdata=1,Ndata_rep,2
pack_tmp=0
idata=idata+1
data_tmp = full_data(idata)
data_tmp = ISHFT(data_tmp,61)
pack_tmp = IOR(pack_tmp,data_tmp)
pack_tmp = ISHFT(pack_tmp,-3)
idata=idata+1
data_tmp = full_data(idata)
data_tmp = ISHFT(data_tmp,61)
pack_tmp = IOR(pack_tmp,data_tmp)
pack_tmp = ISHFT(pack_tmp,0)
pack_tmp = ISHFT(pack_tmp,0)
ipack = ipack + 1
packed_data(ipack) = pack_tmp
ENDDO
END SUBROUTINE ints2bits_3
END MODULE hfx_compression_core_methods
likely caused by
2010-02-16 Richard Guenther <rguenther@suse.de>
PR tree-optimization/41043
* tree-vrp.c (vrp_var_may_overflow): Only ask SCEV for real loops.
(vrp_visit_assignment_or_call): Do not ask SCEV for regular
statements ...
(vrp_visit_phi_node): ... but only for loop PHI nodes.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |rguenth at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
Last reconfirmed|2010-04-02 10:25:15 |2010-04-02 14:23:22
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43627
next prev parent reply other threads:[~2010-04-02 14:23 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-02 8:14 [Bug tree-optimization/43627] New: [4.5 Regression] slow compilation jv244 at cam dot ac dot uk
2010-04-02 8:16 ` [Bug tree-optimization/43627] " jv244 at cam dot ac dot uk
2010-04-02 8:17 ` jv244 at cam dot ac dot uk
2010-04-02 8:28 ` [Bug tree-optimization/43627] [4.5 Regression] slow compilation (tree canonical iv ) jv244 at cam dot ac dot uk
2010-04-02 9:18 ` steven at gcc dot gnu dot org
2010-04-02 9:27 ` jv244 at cam dot ac dot uk
2010-04-02 9:47 ` jv244 at cam dot ac dot uk
2010-04-02 10:25 ` [Bug tree-optimization/43627] [4.5 Regression] slow compilation (tree canonical iv takes 75%) steven at gcc dot gnu dot org
2010-04-02 12:19 ` rguenth at gcc dot gnu dot org
2010-04-02 12:29 ` jv244 at cam dot ac dot uk
2010-04-02 14:07 ` rguenth at gcc dot gnu dot org
2010-04-02 14:07 ` jv244 at cam dot ac dot uk
2010-04-02 14:08 ` rguenth at gcc dot gnu dot org
2010-04-02 14:13 ` rguenth at gcc dot gnu dot org
2010-04-02 14:17 ` jv244 at cam dot ac dot uk
2010-04-02 14:23 ` rguenth at gcc dot gnu dot org [this message]
2010-04-02 14:27 ` rguenth at gcc dot gnu dot org
2010-04-02 14:39 ` rguenth at gcc dot gnu dot org
2010-04-02 14:53 ` rguenth at gcc dot gnu dot org
2010-04-02 15:10 ` rguenth at gcc dot gnu dot org
2010-04-03 17:17 ` rguenth at gcc dot gnu dot org
2010-04-06 11:28 ` rguenth at gcc dot gnu dot org
2010-04-06 12:33 ` rguenth at gcc dot gnu dot org
2010-04-06 12:33 ` rguenth at gcc dot gnu dot org
2010-04-15 13:47 ` rguenth at gcc dot gnu dot org
2010-04-15 13:47 ` rguenth at gcc dot gnu dot org
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