[Bug tree-optimization/36493] [4.3/4.4 Regression] vectorizer aliasing bug

[pinskia at gcc dot gnu dot org]

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pinskia at gcc dot gnu dot org changed:

   What|Removed |Added

 CC||pinskia at gcc dot gnu dot
   ||org
   Target Milestone|--- |4.3.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36493

[Bug tree-optimization/36493] [4.3/4.4 Regression] vectorizer aliasing bug

[irar at il dot ibm dot com]

--- Comment #5 from irar at il dot ibm dot com  2008-06-17 11:49 ---
Fixed.


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irar at il dot ibm dot com changed:

   What|Removed |Added

 Status|NEW |RESOLVED
   Priority|P1  |P3
 Resolution||FIXED
   Target Milestone|4.3.2   |---


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36493

[Bug tree-optimization/36493] [4.3/4.4 Regression] vectorizer aliasing bug

[irar at gcc dot gnu dot org]

--- Comment #3 from irar at gcc dot gnu dot org  2008-06-16 10:39 ---
Subject: Bug 36493

Author: irar
Date: Mon Jun 16 10:39:07 2008
New Revision: 136843

URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=136843
Log:
PR tree-optimization/36493
* tree-vect-transform.c (vect_create_data_ref_ptr): Remove TYPE from
the arguments list. Use VECTYPE to create vector pointer.
(vectorizable_store): Fail if accesses through a pointer to vectype
do not alias the original memory reference operands.
Call vect_create_data_ref_ptr without the removed argument.
(vectorizable_load): Likewise.
(vect_setup_realignment): Call vect_create_data_ref_ptr without the
removed argument.


Added:
trunk/gcc/testsuite/gcc.dg/vect/pr36493.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-transform.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36493

[Bug tree-optimization/36493] [4.3/4.4 Regression] vectorizer aliasing bug

[irar at gcc dot gnu dot org]

--- Comment #4 from irar at gcc dot gnu dot org  2008-06-16 10:43 ---
Subject: Bug 36493

Author: irar
Date: Mon Jun 16 10:42:56 2008
New Revision: 136844

URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=136844
Log:
PR tree-optimization/36493
* tree-vect-transform.c (vect_create_data_ref_ptr): Remove TYPE from
the arguments list. Use VECTYPE to create vector pointer.
(vectorizable_store): Fail if accesses through a pointer to vectype
do not alias the original memory reference operands.
Call vect_create_data_ref_ptr without the removed argument.
(vectorizable_load): Likewise.
(vect_setup_realignment): Call vect_create_data_ref_ptr without the
removed argument.


Added:
branches/gcc-4_3-branch/gcc/testsuite/gcc.dg/vect/pr36493.c
Modified:
branches/gcc-4_3-branch/gcc/ChangeLog
branches/gcc-4_3-branch/gcc/testsuite/ChangeLog
branches/gcc-4_3-branch/gcc/tree-vect-transform.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36493

[Bug tree-optimization/36493] [4.3/4.4 Regression] vectorizer aliasing bug

[mmitchel at gcc dot gnu dot org]

-- 

mmitchel at gcc dot gnu dot org changed:

   What|Removed |Added

   Priority|P3  |P1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36493

[Bug tree-optimization/36493] [4.3/4.4 Regression] vectorizer aliasing bug

[irar at il dot ibm dot com]

--- Comment #1 from irar at il dot ibm dot com  2008-06-11 08:00 ---
Reproduced on powerpc64-suse-linux.

Doesn't occur when compiled with -O2 -ftree-vectorize instead of -O3 (the
vectorizer generates the same code in both cases).


-- 

irar at il dot ibm dot com changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEW
 Ever Confirmed|0   |1
   Last reconfirmed|-00-00 00:00:00 |2008-06-11 08:00:41
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36493

[Bug tree-optimization/36493] [4.3/4.4 Regression] vectorizer aliasing bug

[rguenth at gcc dot gnu dot org]

--- Comment #2 from rguenth at gcc dot gnu dot org  2008-06-11 08:37 ---
Vectors have the alias set of their element type and int and long do not have
conflicting alias sets.  The vectorizer clearly should choose vector long *
instead of vector int *.


-- 

rguenth at gcc dot gnu dot org changed:

   What|Removed |Added

 CC||rguenth at gcc dot gnu dot
   ||org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36493

[Bug tree-optimization/36493] [4.3/4.4 Regression] vectorizer aliasing bug

[jsm28 at gcc dot gnu dot org]

-- 

jsm28 at gcc dot gnu dot org changed:

   What|Removed |Added

   Target Milestone|--- |4.3.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36493