[Bug tree-optimization/53636] SLP may create invalid unaligned memory accesses

2012-06-26 Thread uweigand at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53636

--- Comment #3 from Ulrich Weigand uweigand at gcc dot gnu.org 2012-06-26 
09:05:56 UTC ---
Author: uweigand
Date: Tue Jun 26 09:05:48 2012
New Revision: 188979

URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=188979
Log:
PR tree-optimization/53729
PR tree-optimization/53636
* tree-vect-slp.c (vect_slp_analyze_bb_1): Delay call to
vect_verify_datarefs_alignment until after statements have
been marked as relevant/irrelevant.
* tree-vect-data-refs.c (vect_verify_datarefs_alignment):
Skip irrelevant statements.
(vect_enhance_data_refs_alignment): Use STMT_VINFO_RELEVANT_P
instead of STMT_VINFO_RELEVANT.
(vect_get_data_access_cost): Do not check for supportable
alignment before calling vect_get_load_cost/vect_get_store_cost.
* tree-vect-stmts.c (vect_get_store_cost): Do not abort when
handling unsupported alignment.
(vect_get_load_cost): Likewise.

Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-vect-data-refs.c
trunk/gcc/tree-vect-slp.c
trunk/gcc/tree-vect-stmts.c

[Bug tree-optimization/53636] SLP may create invalid unaligned memory accesses

2012-06-15 Thread uweigand at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53636

--- Comment #1 from Ulrich Weigand uweigand at gcc dot gnu.org 2012-06-15 
13:30:40 UTC ---
Author: uweigand
Date: Fri Jun 15 13:30:36 2012
New Revision: 188661

URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=188661
Log:
gcc/
PR tree-optimization/53636
* tree-vect-data-refs.c (vect_compute_data_ref_alignment): Verify
stride when doing basic-block vectorization.

gcc/testsuite/
PR tree-optimization/53636
* gcc.target/arm/pr53636.c: New test.

Added:
trunk/gcc/testsuite/gcc.target/arm/pr53636.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-data-refs.c

[Bug tree-optimization/53636] SLP may create invalid unaligned memory accesses

2012-06-15 Thread uweigand at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53636

--- Comment #2 from Ulrich Weigand uweigand at gcc dot gnu.org 2012-06-15 
15:11:51 UTC ---
Now fixed on mainline; still fails on 4.7.

(While the bug is probably latent even earlier, this particular test case does
not crash on 4.6.)

[Bug tree-optimization/53636] SLP may create invalid unaligned memory accesses

2012-06-11 Thread uweigand at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53636

Ulrich Weigand uweigand at gcc dot gnu.org changed:

   What|Removed |Added

 Status|UNCONFIRMED |ASSIGNED
   Last reconfirmed||2012-06-11
 AssignedTo|unassigned at gcc dot   |uweigand at gcc dot gnu.org
   |gnu.org |
 Ever Confirmed|0   |1