* Makefile.in (OBJC-common): Add tree-ssa-threadupdate.c

        (tree-ssa-threadupdate.o): Add dependencies.
        * tree-ssa-threadupdate.c: New file.
        * tree-flow.h (incoming_edge_threaded): New flag in block annotation.
        (rewrite_vars_out_of_ssa): Remove prototype.
        (cleanup_tree_cfg): Returns a bool.
        * tree.h (thread_through_all_blocks): Prototype.
        * tree-outof-ssa.c  (SSANORM_*): Move into here.
        (remove_ssa_form): Now static.
        (rewrite_vars_out_of_ssa): Kill.
        * tree-ssa-live.c (register_ssa_partitions_for_vars): Kill.
        * tree-ssa-live.h (SSANORM_*): Moved into tree-outof-ssa.c.
        (remove_ssa_form, register_partitions_for_vars): Kill declarations.
        * tree-cfg.c (cleanup_tree_cfg): Return a value indicating if
        anything was changed.
        * tree-phinodes.c (add_phi_arg): Get the block for the PHI
        from the PHI's annotation rather than the edge associated with
        the new argument.
        * tree-ssa-dom.c (redirection_edges): Kill.
        (redirect_edges_and_update_ssa_graph): Kill.
        (tree_ssa_dominator_optimize): Do not reset forwardable flag
        for blocks anymore.  Do not initialize redirection_edges.
        Call thread_through_all_blocks.  Simplify code for cleanup
        of the CFG and iterating.  No longer call cleanup_tree_cfg
        outside the iteration loop.
        (thread_across_edge): No longer mess with forwardable blocks.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@85721 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 5 insertions, 2 deletions

diff --git a/gcc/tree-flow.h b/gcc/tree-flow.h
index f55943b5cdb..d470035470e 100644
--- a/gcc/tree-flow.h
+++ b/gcc/tree-flow.h
@@ -356,6 +356,10 @@ struct bb_ann_d GTY(())
   /* Nonzero if this block contains an escape point (see is_escape_site).  */
   unsigned has_escape_site : 1;
 
+  /* Nonzero if one or more incoming edges to this block should be threaded
+     to an outgoing edge of this block.  */
+  unsigned incoming_edge_threaded : 1;
+
   struct edge_prediction *predictions;
 };
 
@@ -474,7 +478,7 @@ extern void debug_loop_ir (void);
 extern void print_loop_ir (FILE *);
 extern void cleanup_dead_labels (void);
 extern void group_case_labels (void);
-extern void cleanup_tree_cfg (void);
+extern bool cleanup_tree_cfg (void);
 extern tree first_stmt (basic_block);
 extern tree last_stmt (basic_block);
 extern tree *last_stmt_ptr (basic_block);
@@ -561,7 +565,6 @@ typedef bool (*walk_use_def_chains_fn) (tree, tree, void *);
 
 /* In tree-ssa.c  */
 extern void init_tree_ssa (void);
-extern void rewrite_vars_out_of_ssa (bitmap);
 extern void dump_reaching_defs (FILE *);
 extern void debug_reaching_defs (void);
 extern void dump_tree_ssa (FILE *);