[Bug tree-optimization/43023] missing SSA_NAME def for -ftree-loop-distribution in 459.GemsFDTD

["spop at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43023

--- Comment #6 from Sebastian Pop <spop at gcc dot gnu.org> 2010-12-23 18:51:55 UTC ---
Author: spop
Date: Thu Dec 23 18:51:51 2010
New Revision: 168212

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=168212
Log:
Fix PR43023: fuse_partitions_with_similar_memory_accesses.

2010-12-23  Sebastian Pop  <sebastian.pop@amd.com>

    PR tree-optimization/43023
    * tree-data-ref.c (mem_write_stride_of_same_size_as_unit_type_p):
    Removed.
    (stores_zero_from_loop): Call stmt_stores_zero.
    (stmt_with_adjacent_zero_store_dr_p): New.
    * tree-data-ref.h (stmt_with_adjacent_zero_store_dr_p): Declared.
    (stride_of_unit_type_p): New.
    * tree-loop-distribution.c (generate_memset_zero): Do not return a
    boolean.  Call gcc_assert on stride_of_unit_type_p.
    (generate_builtin): Call stmt_stores_zero.
    (rdg_flag_all_uses): Removed.
    (rdg_flag_similar_memory_accesses): Removed.
    (build_rdg_partition_for_component): Removed parameter
    other_stores.  Removed call to rdg_flag_similar_memory_accesses.
    (can_generate_builtin): New.
    (similar_memory_accesses): New.
    (fuse_partitions_with_similar_memory_accesses): New.
    (rdg_build_partitions): Call
    fuse_partitions_with_similar_memory_accesses.

    * gfortran.dg/ldist-1.f90: Adjust pattern.
    * gfortran.dg/ldist-pr43023.f90: New.

Added:
    branches/gcc-4_5-branch/gcc/testsuite/gfortran.dg/ldist-pr43023.f90
Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_5-branch/gcc/testsuite/gfortran.dg/ldist-1.f90
    branches/gcc-4_5-branch/gcc/tree-data-ref.c
    branches/gcc-4_5-branch/gcc/tree-data-ref.h
    branches/gcc-4_5-branch/gcc/tree-loop-distribution.c