[Bug middle-end/58956] [4.7 Regression] wrong code at -O1 and above (affecting gcc 4.6 to trunk)

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58956

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Dec 16 08:09:05 2013
New Revision: 206009

URL: http://gcc.gnu.org/viewcvs?rev=206009&root=gcc&view=rev
Log:
    PR middle-end/58956
    PR middle-end/59470
    * gimple-walk.h (walk_stmt_load_store_addr_fn): New typedef.
    (walk_stmt_load_store_addr_ops, walk_stmt_load_store_ops): Use it
    for callback params.
    * gimple-walk.c (walk_stmt_load_store_ops): Likewise.
    (walk_stmt_load_store_addr_ops): Likewise.  Adjust all callback
    calls to supply the gimple operand containing the base tree
    as an extra argument.
    * tree-ssa-ter.c: Include gimple-walk.h.
    (find_ssaname, find_ssaname_in_store): New helper functions.
    (find_replaceable_in_bb): For calls or GIMPLE_ASM, only set
    same_root_var if USE is used somewhere in the stores of the stmt.
    * ipa-prop.c (visit_ref_for_mod_analysis): Remove name of the stmt
    argument and ATTRIBUTE_UNUSED, add another unnamed tree argument.
    * ipa-pure-const.c (check_load, check_store, check_ipa_load,
    check_ipa_store): Likewise.
    * gimple.c (gimple_ior_addresses_taken_1, check_loadstore): Likewise.
    * ipa-split.c (test_nonssa_use, mark_nonssa_use): Likewise.
    (verify_non_ssa_vars, visit_bb): Adjust their callers.
    * cfgexpand.c (add_scope_conflicts_1): Use
    walk_stmt_load_store_addr_fn type for visit variable.
    (visit_op, visit_conflict): Remove name of the stmt
    argument and ATTRIBUTE_UNUSED, add another unnamed tree argument.
    * tree-sra.c (asm_visit_addr): Likewise.  Remove name of the data
    argument and ATTRIBUTE_UNUSED.
    * cgraphbuild.c (mark_address, mark_load, mark_store): Add another
    unnamed tree argument.
    * gimple-ssa-isolate-paths.c (check_loadstore): Likewise.  Remove
    ATTRIBUTE_UNUSED from stmt parameter.

    * gcc.target/i386/pr59470.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr59470.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgexpand.c
    trunk/gcc/cgraphbuild.c
    trunk/gcc/gimple-ssa-isolate-paths.c
    trunk/gcc/gimple-walk.c
    trunk/gcc/gimple-walk.h
    trunk/gcc/gimple.c
    trunk/gcc/ipa-prop.c
    trunk/gcc/ipa-pure-const.c
    trunk/gcc/ipa-split.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-sra.c
    trunk/gcc/tree-ssa-ter.c