PR tree-optimization/52558

    PR tree-optimization/52558
        Backport from mainline:
        2012-05-21  Aldy Hernandez  <aldyh@redhat.com>
        * gimple.h (gimple_set_in_transaction): Remove.
        (gimple_in_transaction): Look in BB instead.
        (gimple_statement_base): Remove in_transaction field.
        * basic-block.h (enum bb_flags): Add BB_IN_TRANSACTION.
        * trans-mem.c (compute_transaction_bits): Place transaction bit
        information into basic blocks.
        2012-05-31  Aldy Hernandez  <aldyh@redhat.com>
        PR tree-optimization/52558
        * cfg.c (alloc_aux_for_edge): Fix comment.
        (alloc_aux_for_edge): Remove static.
        * basic-block.h (alloc_aux_for_edge): Protoize.
        * tree-ssa-loop-im.c (execute_sm_if_changed): New.
        (execute_sm_if_changed_flag): New.
        (execute_sm_if_changed_flag_set): New.
        (execute_sm): Do not generate data races unless requested.
        (tree_ssa_lim_initialize): Call alloc_aux_for_edges.
        (tree_ssa_lim_finalize): Call free_aux_for_edges.
        * gimple.h (block_in_transaction): New.
        (gimple_in_transaction): Use block_in_transaction.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_7-branch@188631 138bc75d-0d04-0410-961f-82ee72b054a4