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Subject: [Bug tree-optimization/43023] missing SSA_NAME def for -ftree-loop-distribution in 459.GemsFDTD
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43023

--- Comment #4 from Sebastian Pop <spop at gcc dot gnu.org> 2010-12-10 19:16:54 UTC ---
Author: spop
Date: Fri Dec 10 19:16:48 2010
New Revision: 167697

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=167697
Log:
Fix PR43023: fuse_partitions_with_similar_memory_accesses.

2010-12-10  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.
    * tree-data-ref.h (stmt_stores_zero): 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:
    trunk/gcc/testsuite/gfortran.dg/ldist-pr43023.f90
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gfortran.dg/ldist-1.f90
    trunk/gcc/tree-data-ref.c
    trunk/gcc/tree-data-ref.h
    trunk/gcc/tree-loop-distribution.c