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* [Bug regression/18173] New: execution failure in vect-[8,30].c on ppc-linux
@ 2004-10-27 11:35 dorit at il dot ibm dot com
2004-10-27 11:43 ` [Bug target/18173] " pinskia at gcc dot gnu dot org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: dorit at il dot ibm dot com @ 2004-10-27 11:35 UTC (permalink / raw)
To: gcc-bugs
Getting the following testsuite failures on ppc-linux:
FAIL: gcc.dg/vect/vect-30.c execution test
FAIL: gcc.dg/vect/vect-8.c execution test
These failures seem to be related to alignment - when the array types are
changed from float to afloat:
typedef float afloat __attribute__ ((__aligned__(16)));
the tests pass ok.
When compiling the original version, the vectorizer forces the alignment of
these arrays:
if (vect_debug_details (NULL))
fprintf (dump_file, "force alignment");
DECL_ALIGN (base) = TYPE_ALIGN (vectype);
DECL_USER_ALIGN (base) = TYPE_ALIGN (vectype);
The tree dump files generated in both cases (float and afloat) looks identical,
as well as the RTL dumps; in both cases we have the following vector load/store
generated (note the A128):
(insn:TI 44 43 47 3 (set (reg:V4SF 77 0 [151])
(mem:V4SF (reg/f:SI 11 11 [orig:130 ivtmp.55 ] [130]) [4 S16 A128]))
482 {altivec_lvx_4sf} (nil)
(expr_list:REG_EQUIV (mem:V4SF (reg/f:SI 9 9 [orig:129 ivtmp.65 ] [129]) [4
S16 A128])
(nil)))
(insn:TI 45 47 48 3 (set (mem:V4SF (reg/f:SI 9 9 [orig:129 ivtmp.65 ] [129]) [4
S16 A128])
(reg:V4SF 77 0 [151])) 486 {altivec_stvx_4sf} (insn_list:REG_DEP_TRUE
44 (nil))
(nil))
Yet the version with afloats runs correctly, and the original version aborts.
Possible places to look into:
- vect_can_force_dr_alignment_p is wrong?
- PREFERRD_STACK_BOUNDARY != STACK_BOUNDARY (not the case here)
- setting DECL_USER_ALIGN/DECL_ALIGN is not enough?
- the decl alignment attribute not propagated to RTL? (looks like it is)
- assembler problem?
This may be related to PR17589.
I can send a patch that changes floats to afloats, as a temporary fix.
--
Summary: execution failure in vect-[8,30].c on ppc-linux
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: regression
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dorit at il dot ibm dot com
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: powerpc-suse-linux
GCC host triplet: powerpc-suse-linux
GCC target triplet: powerpc-suse-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18173
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug target/18173] execution failure in vect-[8,30].c on ppc-linux
2004-10-27 11:35 [Bug regression/18173] New: execution failure in vect-[8,30].c on ppc-linux dorit at il dot ibm dot com
@ 2004-10-27 11:43 ` pinskia at gcc dot gnu dot org
2004-11-23 20:08 ` dorit at il dot ibm dot com
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-10-27 11:43 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Component|regression |target
Keywords| |wrong-code
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18173
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug target/18173] execution failure in vect-[8,30].c on ppc-linux
2004-10-27 11:35 [Bug regression/18173] New: execution failure in vect-[8,30].c on ppc-linux dorit at il dot ibm dot com
2004-10-27 11:43 ` [Bug target/18173] " pinskia at gcc dot gnu dot org
@ 2004-11-23 20:08 ` dorit at il dot ibm dot com
2004-11-30 14:03 ` cvs-commit at gcc dot gnu dot org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: dorit at il dot ibm dot com @ 2004-11-23 20:08 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From dorit at il dot ibm dot com 2004-11-23 20:08 -------
see - http://gcc.gnu.org/ml/gcc-patches/2004-11/msg01891.html
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18173
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug target/18173] execution failure in vect-[8,30].c on ppc-linux
2004-10-27 11:35 [Bug regression/18173] New: execution failure in vect-[8,30].c on ppc-linux dorit at il dot ibm dot com
2004-10-27 11:43 ` [Bug target/18173] " pinskia at gcc dot gnu dot org
2004-11-23 20:08 ` dorit at il dot ibm dot com
@ 2004-11-30 14:03 ` cvs-commit at gcc dot gnu dot org
2004-11-30 14:10 ` dorit at il dot ibm dot com
2004-11-30 14:34 ` pinskia at gcc dot gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2004-11-30 14:03 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2004-11-30 14:03 -------
Subject: Bug 18173
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: dorit@gcc.gnu.org 2004-11-30 14:02:45
Modified files:
gcc : ChangeLog
Log message:
changed from 'PR tree-opt/18173' to 'PR target/18173'
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.6644&r2=2.6645
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18173
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug target/18173] execution failure in vect-[8,30].c on ppc-linux
2004-10-27 11:35 [Bug regression/18173] New: execution failure in vect-[8,30].c on ppc-linux dorit at il dot ibm dot com
` (2 preceding siblings ...)
2004-11-30 14:03 ` cvs-commit at gcc dot gnu dot org
@ 2004-11-30 14:10 ` dorit at il dot ibm dot com
2004-11-30 14:34 ` pinskia at gcc dot gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: dorit at il dot ibm dot com @ 2004-11-30 14:10 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From dorit at il dot ibm dot com 2004-11-30 14:10 -------
(In reply to comment #2)
> Subject: Bug 18173
> CVSROOT: /cvs/gcc
> Module name: gcc
> Changes by: dorit@gcc.gnu.org 2004-11-30 14:02:45
> Modified files:
> gcc : ChangeLog
> Log message:
> changed from 'PR tree-opt/18173' to 'PR target/18173'
> Patches:
> http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?
cvsroot=gcc&r1=2.6644&r2=2.6645
This is the relevant patch: http://gcc.gnu.org/ml/gcc-cvs/2004-11/msg01457.html
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18173
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug target/18173] execution failure in vect-[8,30].c on ppc-linux
2004-10-27 11:35 [Bug regression/18173] New: execution failure in vect-[8,30].c on ppc-linux dorit at il dot ibm dot com
` (3 preceding siblings ...)
2004-11-30 14:10 ` dorit at il dot ibm dot com
@ 2004-11-30 14:34 ` pinskia at gcc dot gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-11-30 14:34 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-11-30 14:34 -------
Fixed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18173
^ permalink raw reply [flat|nested] 6+ messages in thread
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2004-10-27 11:35 [Bug regression/18173] New: execution failure in vect-[8,30].c on ppc-linux dorit at il dot ibm dot com
2004-10-27 11:43 ` [Bug target/18173] " pinskia at gcc dot gnu dot org
2004-11-23 20:08 ` dorit at il dot ibm dot com
2004-11-30 14:03 ` cvs-commit at gcc dot gnu dot org
2004-11-30 14:10 ` dorit at il dot ibm dot com
2004-11-30 14:34 ` pinskia at gcc dot gnu dot org
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