2012-08-02 Richard Guenther <rguenther@suse.de>

	* tree-flow.h (set_default_def): Rename to ...
	(set_ssa_default_def): ... this.  Take a struct function argument.
	(gimple_default_def): Rename to ...
	(ssa_default_def): ... this.
	(get_or_create_ssa_default_def): New function.
	* tree-dfa.c: Likewise.
	(dump_variable): Adjust.
	* ipa-prop.c (ipa_analyze_params_uses): Adjust, properly check
	for used parameters.
	* ipa-split.c (consider_split): Adjust, avoid repeated default-def
	lookups.
	(split_function): Likewise.
	* lto-streamer-in.c (input_ssa_names): Adjust.
	* omp-low.c (expand_omp_taskreg): Likewise.
	* tree-cfg.c (replace_ssa_name): Adjust, no need to push/pop cfun.
	* tree-complex.c (init_parameter_lattice_values): Adjust.
	(get_component_ssa_name): Likewise.
	(update_parameter_components): Likewise.
	* tree-inline.c (remap_ssa_name): Likewise.
	(setup_one_parameter): Likewise.
	(initialize_inlined_parameters): Likewise.
	(declare_return_variable): Likewise.
	(expand_call_inline): Likewise.
	(tree_function_versioning): Likewise.
	* tree-into-ssa.c (get_default_def_for): Remove.
	(get_reaching_def): Use get_or_create_ssa_default_def instead.
	* tree-predcom.c (replace_ref_with): Adjust.
	* tree-sra.c (get_repl_default_def_ssa_name): Likewise.
	(is_unused_scalar_param): Likewise.
	(ptr_parm_has_direct_uses): Likewise.
	(sra_ipa_reset_debug_stmts): Likewise.
	* tree-ssa-coalesce.c (create_outofssa_var_map): Adjust.
	* tree-ssa-copyrename.c (copy_rename_partition_coalesce): Likewise.
	* tree-ssa-live.c (verify_live_on_entry): Likewise.
	* tree-ssa-math-opts.c (execute_cse_reciprocals): Likewise,
	avoid repeated default def lookups.
	* tree-ssa-sccvn.c (run_scc_vn): Likewise.
	* tree-tailcall.c (arg_needs_copy_p): Adjust.
	(tree_optimize_tail_calls_1): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@190073 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 15 insertions, 32 deletions

diff --git a/gcc/ipa-split.c b/gcc/ipa-split.c
index be21436f0d3..d6aad8977e9 100644
--- a/gcc/ipa-split.c
+++ b/gcc/ipa-split.c
@@ -438,14 +438,17 @@ consider_split (struct split_point *current, bitmap non_ssa_vars,
 	      return;
 	    }
 	}
-      else if (gimple_default_def (cfun, parm)
-	       && bitmap_bit_p (current->ssa_names_to_pass,
-				SSA_NAME_VERSION (gimple_default_def
-						  (cfun, parm))))
+      else
 	{
-	  if (!VOID_TYPE_P (TREE_TYPE (parm)))
-	    call_overhead += estimate_move_cost (TREE_TYPE (parm));
-	  num_args++;
+	  tree ddef = ssa_default_def (cfun, parm);
+	  if (ddef
+	      && bitmap_bit_p (current->ssa_names_to_pass,
+			       SSA_NAME_VERSION (ddef)))
+	    {
+	      if (!VOID_TYPE_P (TREE_TYPE (parm)))
+		call_overhead += estimate_move_cost (TREE_TYPE (parm));
+	      num_args++;
+	    }
 	}
     }
   if (!VOID_TYPE_P (TREE_TYPE (current_function_decl)))
@@ -1056,7 +1059,7 @@ split_function (struct split_point *split_point)
   bool split_part_return_p = false;
   gimple last_stmt = NULL;
   unsigned int i;
-  tree arg;
+  tree arg, ddef;
 
   if (dump_file)
     {
@@ -1074,24 +1077,16 @@ split_function (struct split_point *split_point)
        parm; parm = DECL_CHAIN (parm), num++)
     if (args_to_skip
 	&& (!is_gimple_reg (parm)
-	    || !gimple_default_def (cfun, parm)
+	    || (ddef = ssa_default_def (cfun, parm)) == NULL_TREE
 	    || !bitmap_bit_p (split_point->ssa_names_to_pass,
-			      SSA_NAME_VERSION (gimple_default_def (cfun,
-								    parm)))))
+			      SSA_NAME_VERSION (ddef))))
       bitmap_set_bit (args_to_skip, num);
     else
       {
 	/* This parm might not have been used up to now, but is going to be
 	   used, hence register it.  */
 	if (is_gimple_reg (parm))
-	  {
-	    arg = gimple_default_def (cfun, parm);
-	    if (!arg)
-	      {
-		arg = make_ssa_name (parm, gimple_build_nop ());
-		set_default_def (parm, arg);
-	      }
-	  }
+	  arg = get_or_create_ssa_default_def (cfun, parm);
 	else
 	  arg = parm;
 
@@ -1356,19 +1351,7 @@ split_function (struct split_point *split_point)
 		     assigned to RESULT_DECL (that is pointer to return value).
 		     Look it up or create new one if it is missing.  */
 		  if (DECL_BY_REFERENCE (retval))
-		    {
-		      tree retval_name;
-		      if ((retval_name = gimple_default_def (cfun, retval))
-			  != NULL)
-			retval = retval_name;
-		      else
-			{
-		          retval_name = make_ssa_name (retval,
-						       gimple_build_nop ());
-			  set_default_def (retval, retval_name);
-			  retval = retval_name;
-			}
-		    }
+		    retval = get_or_create_ssa_default_def (cfun, retval);
 		  /* Otherwise produce new SSA name for return value.  */
 		  else
 		    retval = make_ssa_name (retval, call);