lambda-code.c (lambda_loopnest_to_gcc_loopnest): Use update_stmt.

2005-04-05  Andrew MacLeod  <amacleod@redhat.com>

	* lambda-code.c (lambda_loopnest_to_gcc_loopnest): Use update_stmt.
	Use immediate use iterator.
	(stmt_is_bumper_for_loop): Use immediate use iterator.
	* predict.c (strip_builtin_expect): Use update_stmt.
	* tree-cfg.c (update_modified_stmts): New. Call update_stmt_if_modified
	on all elements of a STATEMENT_LIST.
	(bsi_insert_before, bsi_insert_after): Call update_modified_stmts.
	(bsi_remove): Remove imm_use links and mark the stmt as modified.
	(bsi_replace): Mark stmt as modified and the update it.
	* tree-complex.c (update_complex_assignment): Call mark_stmt_modified.
	(expand_complex_libcal): Call update_stmt.
	(expand_complex_comparison): Call mark_stmt_modified.
	(expand_complex_operations_1): Call update_stmt_if_modified.
	(expand_vector_operations_1): Call mark_stmt_modified.
	* tree-dfa.c (compute_immediate_uses, free_df_for_stmt, free_df,
	compute_immediate_uses_for_phi, compute_immediate_uses_for_stmt,
	add_immediate_use, redirect_immediate_use,
	redirect_immediate_uses, dump_immediate_uses, debug_immediate_uses,
	dump_immediate_uses_for, debug_immediate_uses_for): Delete.
	(mark_new_vars_to_rename): Call update_stmt.
	* tree-dump.c (dump_option_value_in): Add "stmtaddr".
	* tree-flow-inline.h (modify_stmt): Rename to mark_stmt_modified.
	Ignore PHI nodes.
	(unmodify_stmt): Delete.
	(update_stmt): New.  Force an update of a stmt.
	(update_stmt_if_modified): update a stmt if it is out of date.
	(get_stmt_operands): Verify stmt is NOT modified.
	(stmt_modified_p): Update comment.
	(delink_imm_use): Remove a use node from its immuse list.
	(link_imm_use_to_list): Link a use node to a specific list.
	(link_imm_use): Link a node to the correct list.
	(set_ssa_use_from_ptr): Set a use node to a specific value, and insert
	it in the correct list, if appropriate.
	(link_imm_use_stmt): Link a use node, and set the stmt pointer.
	(relink_imm_use): Link a use node in place of another node in a list.
	(relink_imm_use_stmt): LInk a node in place of another node, and set
	the stmt pointer.
	(end_safe_imm_use_traverse): New.  Terminate a safe immuse iterator.
	(end_safe_imm_use_p): New.  Check for the end of a safe immuse iterator.
	(first_safe_imm_use): New.  Initialize a safe immuse iterator.
	(next_safe_imm_use): New.  Proceed to next safe immuse iterator value.
	(end_readonly_imm_use_p): New.  Check for end of a fast immuse iterator.
	(first_readonly_imm_use): New.  Initialize a fast immuse iterator.
	(next_readonly_imm_use): New.  Get the next fast immuse iterator value.
	(has_zero_uses): New.  Return true if there are no uses of a var.
	(has_single_use): New.  Return true if there is only a single use of a
	variable.
	(single_imm_use): New.  Return the simgle immediate use.
	(num_imm_uses): New.  Return the number of immediate uses.
	(get_v_must_def_ops): Use is now a pointer.
	(use_operand_p, get_v_may_def_op_ptr, get_vuse_op_ptr,
	get_v_must_def_kill_ptr, get_phi_arg_def_ptr): Return the address of
	the use node.
	(get_immediate_uses, num_immediate_uses, immediate_use): Delete.
	(delink_stmt_imm_use): Delink all immuses from a stmt.
	(phi_arg_index_from_use): New.  Return a phi arg index for a use.
	* tree-flow.h (struct dataflow_d): Delete.
	(immediate_use_iterator_d): New.  Immediate use iterator struct.
	(FOR_EACH_IMM_USE_FAST): New.  Macro for read only immuse iteration.
	(FOR_EACH_IMM_USE_SAFE): New.  Macro for write-safe immuse iteration.
	(BREAK_FROM_SAFE_IMM_USE): New.  Macro for earlyu exit from write-safe
	iteration.
	(struct stmt_ann_d): Remove dataflow_t from struct.
	* tree-if-conv.c (tree_if_conversion).  Don't call free_df.
	(if_convertible_phi_p): Use FAST immuse iterator.
	(if_convertible_loop_p): Don't call compute_immediate_uses.
	(replace_phi_with_cond_modify_expr): Call update_stmt.
	* tree-into-ssa.c (mark_def_sites, ssa_mark_def_sites): Call
	update_stmt_if_modified.
	(rewrite_all_into_ssa): Initialize ssa operands.
	* tree-loop-linear.c (linear_transform_loops): Don't call free_df or
	compute_immediate_uses.
	* tree-optimize.c (execute_todo): Call verify_ssa whenever the
	ssa_property is available.
	(execute_one_pass):  Change parameters passed to execute_todo.
	* tree-outof-ssa.c (rewrite_trees): Don't call modify_stmt.
	(remove_ssa_form): Call fini_ssa_operands.
	(insert_backedge_copies): Delete call to modify_stmt.
	* tree-phinodes.c (make_phi_node): Initialize use nodes.
	(release_phi_node): Delink any use nodes before releasing.
	(resize_phi_node): Relink any use nodes.
	(remove_phi_arg_num): Delink the use node.
	(remove_phi_node): Release the ssa_name AFTER releasing the phi node.
	(remove_all_phi_nodes_for): Release phi node first.
	* tree-pretty-print.c (dump_generic_node): Print stmt address.
	* tree-sra.c (mark_all_v_defs): Call update_stmt_if_modified.
	(scalarize_use, scalarize_copy): Call update_stmt.
	* tree-ssa-alias.c (compute_may_aliases): Update all modified stmts.
	(compute_points_to_and_addr_escape): Call mark_stmt_modified.
	* tree-ssa-cpp.c (need_imm_uses_for): Delete.
	(ccp_initialize): Remove call to compute_immediate_uses.
	(substitute_and_fold, execute_fold_all_builtins): Call update_stmt.
	* tree-ssa-dom.c (tree_ssa_dominator_optimize): Update all modified
	stmts.
	(simplify_cond_and_lookup_avail_expr): Call mark_stmt_modified.
	(simplify_switch_and_lookup_avail_expr): Call mark_stmt_modified.
	(eliminate_redundant_computations): Call mark_stmt_modified.
	(cprop_operand): Call mark_stmt_modified.
	(optimize_stmt): Call update_stmt_if_modified and mark_stmt_modified.
	* tree-ssa-dse.c (fix_phi_uses, fix_stmt_v_may_defs): Delete.
	(dse_optimize_stmt): Use new immuse interface.
	(tree_ssa_dse): Remove calls to compute_immediate_uses and free_df.
	* tree-ssa-forwprop.c (need_imm_uses_for): Delete.
	(substitute_single_use_vars): Use new immuse interface.
	(tree_ssa_forward_propagate_single_use_vars): Remove calls to free_df
	and compute_immediate_uses.
	* tree-ssa-loop-im.c (single_reachable_address): Use new immuse
	interface.
	(rewrite_mem_refs): Call update_stmt.
	(determine_lsm): Remove call to compute_imm_uses and free_df.
	* tree-ssa-loop-ivcanon.c (create_canonical_iv): Call update_stmt.
	(try_unroll_loop_completely): Call update_stmt.
	* tree-ssa-loop-ivopts.c (rewrite_address_base): Call update_stmt.
	(rewrite_use_compare): Call update_stmt.
	(compute_phi_arg_on_exit): Insert each stmt before trying to process.
	(rewrite_use) : Call update_stmt.
	* tree-ssa-loop-manip.c (verify_loop_closed_ssa): Add arg to call.
	* tree-ssa-loop-unswitch.c (tree_unswitch_single_loop): Call
	update_stmt.
	* tree-ssa-operands.c (NULL_USE_OPERAND_P): Remove declaration.
	(allocate_use_optype, allocate_vuse_optype): Adjust allocation size.
	(free_uses, free_vuses, free_v_may_defs, free_v_must_defs): Delink
	use nodes.
	(initialize_vuse_operand): New.  Initialize a vuse operand.
	(initialize_v_may_def_operand): New.  Initialize a maydef operand.
	(initialize_v_must_def_operand): New.  Initialize a mustdef operand.
	(finalize_ssa_defs): Use stmt parameter.
	(correct_use_link): Ensure a use node is in the correct list, and has
	the correct stmt pointer.
	(finalize_ssa_uses, finalize_ssa_v_may_defs, finalize_ssa_vuses,
	finalize_ssa_v_must_defs): Also initialize use nodes.
	(finalize_ssa_stmt_operands): Pass extra stmt operands.
	(build_ssa_operands): Seperate parsing from final operand construction.
	(parse_ssa_operands): New.  Parse entry point for operand building.
	(swap_tree_operands): New.  Swap 2 tree operands.
	(update_stmt_operands): Ranamed from get_stmt_operands.  Always builds
	operands.
	(get_expr_operands): Call swap_tree_operands when needed.
	(copy_virtual_operands): Use initialize routines for virtual use ops.
	(create_ssa_artficial_load_stmt): Add extra stmt parameter.
	(verify_abort): New.  Issue imm_use error.
	(verify_imm_links): New Verify imm_use links for a var.
	(dump_immediate_uses_for): New.  Dump imm_uses for a var to file.
	(dump_immediate_uses): New.  Dump imm_uses for all vars to file.
	(debug_immediate_uses): New.  Dump imm_uses for all vars to stderr.
	(debug_immediate_uses_for): New.  Dump imm_uses for a var to stderr.
	* tree-ssa-operands.h (struct use_operand_ptr): Delete.
	(NULL_USE_OPERAND_P) Define.
	(use_optype_d, v_def_use_operand_type, vuse_optype_d): Add immediate
	use node.
	(struct vuse_operand_type): New struct.
	(SET_USE): Call set_ssa_use_from_ptr.
	(USE_STMT): Define.
	(PHI_ARG_INDEX_FROM_USE): Define.
	* tree-ssa-phiopt.c (replace_phi_edge_with_variable): Set the phi
	argument via SET_USE, not PHI_ARG_DEF_TREE.
	* tree-ssa-pre.c (eliminate): Call update_stmt.
	* tree-ssa-propagate.c (cfg_blocks_get): Use imm_use iterators.  Don't
	call free_df.
	* tree-ssa-sink.c (all_immediate_uses_same_place): Use imm_use iterator.
	(nearest_common_dominator_of_uses): Use imm_use iterator.
	(statement_sink_location): Use imm_use iterator and interface.
	(execute_sink_code): Don't call compute_immediate_uses or free-df.
	* tree-ssa-threadupdate.c (create_edge_and_update_destination_phis): Use
	PHI_ARG_DEF, not PHI_ARG_DEF_TREE.
	* tree-ssa.c (verify_use, verify_phi_args): Verify some imm_use info.
	(verify_ssa): Ensure no stmt is marked modify after optimization pass
	if new parameter is true.
	(init_tree_ssa): Don't initialize operand cache here.
	(delete_tree_ssa): Don't destroy operand cache here.
	(propagate_into_addr): Pass in a use pointer, return true if anything
	was changed.
	(replace_immediate_uses): Use imm_use iterator, call update_stmt.
	(check_phi_redundancy): Use imm_use iterator.
	(kill_redundant_phi_nodes): Don't call compute_immediate_uses or
	free_df.
	* tree-ssanames.c (make_ssa_name): Initialize imm_use node.
	(release_ssa_name): Delink node and all elements in its imm_use list.
	* tree-tailcall.c (adjust_return_value): Call update_stmt.
	* tree-vect-analyze.c (vect_stmt_relevant_p): Use imm_use iterator.
	* tree-vectorizer.c (need_imm_uses_for): Delete.
	(vectorize_loops): Dont call compute_immediate_uses or free_df.
	* tree.h (struct ssa_imm_use_d): Define.
	(SSA_NAME_IMM_USE_NODE): Define.
	(struct tree_ssa_name): Add imm_use node.
	(PHI_DF): Delete.
	(PHI_ARG_IMM_USE_NODE): Define.
	(struct phi_arg_d): Add imm_use node.
	(struct tree_phi_node): Remove struct dataflow_d element.
	(TDF_STMTADDR): Define.

From-SVN: r97648

1 files changed, 27 insertions, 51 deletions

diff --git a/gcc/tree-flow.h b/gcc/tree-flow.h
index ea08f7a..ebc31ab 100644
--- a/gcc/tree-flow.h
+++ b/gcc/tree-flow.h
@@ -235,43 +235,33 @@ struct var_ann_d GTY(())
 };
 
 
-struct dataflow_d GTY(())
+typedef struct immediate_use_iterator_d
 {
-  /* Immediate uses.  This is a list of all the statements and PHI nodes
-     that are immediately reached by the definitions made in this
-     statement.  */
-  varray_type immediate_uses;
-
-  /* Use this array for very small numbers of uses instead of the varray.  */
-  tree uses[2];
-
-  /* Reached uses.  This is a list of all the possible program statements
-     that may be reached directly or indirectly by definitions made in this
-     statement.  Notice that this is a superset of IMMEDIATE_USES.
-     For instance, given the following piece of code:
-
-	    1	a1 = 10;
-	    2	if (a1 > 3)
-	    3	  a2 = a1 + 5;
-	    4	a3 = PHI (a1, a2)
-	    5	b1 = a3 - 2;
-
-     IMMEDIATE_USES for statement #1 are all those statements that use a1
-     directly (i.e., #2, #3 and #4).  REACHED_USES for statement #1 also
-     includes statement #5 because 'a1' could reach 'a3' via the PHI node
-     at statement #4.  The set of REACHED_USES is then the transitive
-     closure over all the PHI nodes in the IMMEDIATE_USES set.  */
-
-  /* Reaching definitions.  Similarly to REACHED_USES, the set
-     REACHING_DEFS is the set of all the statements that make definitions
-     that may reach this statement.  Notice that we don't need to have a
-     similar entry for immediate definitions, as these are represented by
-     the SSA_NAME nodes themselves (each SSA_NAME node contains a pointer
-     to the statement that makes that definition).  */
-};
+  ssa_imm_use_t *imm_use;
+  ssa_imm_use_t *end_p;
+  ssa_imm_use_t iter_node;
+} imm_use_iterator;
+
 
-typedef struct dataflow_d *dataflow_t;
+/* Use this iterator when simply looking at stmts. Adding, deleteing or
+   modifying stmts will cause this iterator to malfunction.  */
+
+#define FOR_EACH_IMM_USE_FAST(DEST, ITER, SSAVAR)			\
+  for ((DEST) = first_readonly_imm_use (&(ITER), (SSAVAR));	\
+       !end_readonly_imm_use_p (&(ITER));			\
+       (DEST) = next_readonly_imm_use (&(ITER)))
+  
 
+#define FOR_EACH_IMM_USE_SAFE(DEST, ITER, SSAVAR)		\
+  for ((DEST) = first_safe_imm_use (&(ITER), (SSAVAR));		\
+       !end_safe_imm_use_p (&(ITER));				\
+       (DEST) = next_safe_imm_use (&(ITER)))
+
+#define BREAK_FROM_SAFE_IMM_USE(ITER)				\
+   {								\
+     end_safe_imm_use_traverse (&(ITER));			\
+     break;							\
+   }
 
 struct stmt_ann_d GTY(())
 {
@@ -297,11 +287,9 @@ struct stmt_ann_d GTY(())
   /* Basic block that contains this statement.  */
   basic_block GTY ((skip (""))) bb;
 
+  /* Operand cache for stmt.  */
   struct stmt_operands_d operands;
 
-  /* Dataflow information.  */
-  dataflow_t df;
-
   /* Set of variables that have had their address taken in the statement.  */
   bitmap addresses_taken;
 
@@ -340,8 +328,7 @@ static inline enum tree_ann_type ann_type (tree_ann_t);
 static inline basic_block bb_for_stmt (tree);
 extern void set_bb_for_stmt (tree, basic_block);
 static inline bool noreturn_call_p (tree);
-static inline void modify_stmt (tree);
-static inline void unmodify_stmt (tree);
+static inline void update_stmt (tree);
 static inline bool stmt_modified_p (tree);
 static inline varray_type may_aliases (tree);
 static inline int get_lineno (tree);
@@ -353,9 +340,6 @@ static inline vuse_optype get_vuse_ops (stmt_ann_t);
 static inline use_optype get_use_ops (stmt_ann_t);
 static inline def_optype get_def_ops (stmt_ann_t);
 static inline bitmap addresses_taken (tree);
-static inline int num_immediate_uses (dataflow_t);
-static inline tree immediate_use (dataflow_t, int);
-static inline dataflow_t get_immediate_uses (tree);
 static inline void set_default_def (tree, tree);
 static inline tree default_def (tree);
 
@@ -435,7 +419,6 @@ extern bool aliases_computed_p;
 
 #define PERCENT(x,y) ((float)(x) * 100.0 / (float)(y))
 
-
 /*---------------------------------------------------------------------------
 			      Block iterators
 ---------------------------------------------------------------------------*/
@@ -559,13 +542,6 @@ extern void debug_referenced_vars (void);
 extern void dump_referenced_vars (FILE *);
 extern void dump_variable (FILE *, tree);
 extern void debug_variable (tree);
-extern void dump_immediate_uses (FILE *);
-extern void debug_immediate_uses (void);
-extern void dump_immediate_uses_for (FILE *, tree);
-extern void debug_immediate_uses_for (tree);
-extern void compute_immediate_uses (int, bool (*)(tree));
-extern void free_df (void);
-extern void free_df_for_stmt (tree);
 extern tree get_virtual_var (tree);
 extern void add_referenced_tmp_var (tree);
 extern void mark_new_vars_to_rename (tree, bitmap);
@@ -621,7 +597,7 @@ extern edge ssa_redirect_edge (edge, basic_block);
 extern void flush_pending_stmts (edge);
 extern bool tree_ssa_useless_type_conversion (tree);
 extern bool tree_ssa_useless_type_conversion_1 (tree, tree);
-extern void verify_ssa (void);
+extern void verify_ssa (bool);
 extern void delete_tree_ssa (void);
 extern void register_new_def (tree, VEC (tree_on_heap) **);
 extern void walk_use_def_chains (tree, walk_use_def_chains_fn, void *, bool);