c-common.c (self_promoting_args_p): Change the return type to bool.

	* c-common.c (self_promoting_args_p): Change the return type to bool.
	Use false/true instead of 0/1.
	* c-common.h (self_promoting_args_p): Update.

	* c-decl.c (start_decl): Use false/true instead of 0/1.
	(grokdeclarator): Likewise.
	(finish_struct): Likewise.
	(start_function): Change the return type to bool.  Use false/true
	instead of 0/1.
	(declspecs_add_qual): Use UNKNOWN_LOCATION instead of 0.
	* c-tree.h (start_function): Update.
	* c-typeck.c (same_translation_unit_p): Change the return type to bool.
	(set_designator): Change the return type to bool.  Use false/true
	instead of 0/1.

From-SVN: r248192

4 files changed, 44 insertions, 32 deletions

diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog
index 8d55031..4dbeedf 100644
--- a/gcc/c/ChangeLog
+++ b/gcc/c/ChangeLog
@@ -1,3 +1,16 @@
+2017-05-18  Marek Polacek  <polacek@redhat.com>
+
+	* c-decl.c (start_decl): Use false/true instead of 0/1.
+	(grokdeclarator): Likewise.
+	(finish_struct): Likewise.
+	(start_function): Change the return type to bool.  Use false/true
+	instead of 0/1.
+	(declspecs_add_qual): Use UNKNOWN_LOCATION instead of 0.
+	* c-tree.h (start_function): Update.
+	* c-typeck.c (same_translation_unit_p): Change the return type to bool.
+	(set_designator): Change the return type to bool.  Use false/true
+	instead of 0/1.
+
 2017-05-17  Marek Polacek  <polacek@redhat.com>
 
 	* c-decl.c: Use NULL_TREE instead of 0 where appropriate.
diff --git a/gcc/c/c-decl.c b/gcc/c/c-decl.c
index 55fc53e..52d89f8 100644
--- a/gcc/c/c-decl.c
+++ b/gcc/c/c-decl.c
@@ -4663,18 +4663,18 @@ start_decl (struct c_declarator *declarator, struct c_declspecs *declspecs,
       {
       case TYPE_DECL:
 	error ("typedef %qD is initialized (use __typeof__ instead)", decl);
-	initialized = 0;
+	initialized = false;
 	break;
 
       case FUNCTION_DECL:
 	error ("function %qD is initialized like a variable", decl);
-	initialized = 0;
+	initialized = false;
 	break;
 
       case PARM_DECL:
 	/* DECL_INITIAL in a PARM_DECL is really DECL_ARG_TYPE.  */
 	error ("parameter %qD is initialized", decl);
-	initialized = 0;
+	initialized = false;
 	break;
 
       default:
@@ -4684,7 +4684,7 @@ start_decl (struct c_declarator *declarator, struct c_declspecs *declspecs,
 	/* This can happen if the array size is an undefined macro.
 	   We already gave a warning, so we don't need another one.  */
 	if (TREE_TYPE (decl) == error_mark_node)
-	  initialized = 0;
+	  initialized = false;
 	else if (COMPLETE_TYPE_P (TREE_TYPE (decl)))
 	  {
 	    /* A complete type is ok if size is fixed.  */
@@ -4693,13 +4693,13 @@ start_decl (struct c_declarator *declarator, struct c_declspecs *declspecs,
 		|| C_DECL_VARIABLE_SIZE (decl))
 	      {
 		error ("variable-sized object may not be initialized");
-		initialized = 0;
+		initialized = false;
 	      }
 	  }
 	else if (TREE_CODE (TREE_TYPE (decl)) != ARRAY_TYPE)
 	  {
 	    error ("variable %qD has initializer but incomplete type", decl);
-	    initialized = 0;
+	    initialized = false;
 	  }
 	else if (C_DECL_VARIABLE_SIZE (decl))
 	  {
@@ -4708,7 +4708,7 @@ start_decl (struct c_declarator *declarator, struct c_declspecs *declspecs,
 	       sense to permit them to be initialized given that
 	       ordinary VLAs may not be initialized.  */
 	    error ("variable-sized object may not be initialized");
-	    initialized = 0;
+	    initialized = false;
 	  }
       }
 
@@ -5573,7 +5573,7 @@ grokdeclarator (const struct c_declarator *declarator,
   tree decl_attr = declspecs->decl_attr;
   int array_ptr_quals = TYPE_UNQUALIFIED;
   tree array_ptr_attrs = NULL_TREE;
-  int array_parm_static = 0;
+  bool array_parm_static = false;
   bool array_parm_vla_unspec_p = false;
   tree returned_attrs = NULL_TREE;
   bool bitfield = width != NULL;
@@ -5907,7 +5907,7 @@ grokdeclarator (const struct c_declarator *declarator,
 	  error_at (loc, "static or type qualifiers in non-parameter array declarator");
 	  array_ptr_quals = TYPE_UNQUALIFIED;
 	  array_ptr_attrs = NULL_TREE;
-	  array_parm_static = 0;
+	  array_parm_static = false;
 	}
 
       switch (declarator->kind)
@@ -6277,7 +6277,7 @@ grokdeclarator (const struct c_declarator *declarator,
 			  "array declarator");
 		array_ptr_quals = TYPE_UNQUALIFIED;
 		array_ptr_attrs = NULL_TREE;
-		array_parm_static = 0;
+		array_parm_static = false;
 	      }
 	    orig_qual_indirect++;
 	    break;
@@ -7862,7 +7862,6 @@ finish_struct (location_t loc, tree t, tree fieldlist, tree attributes,
 {
   tree x;
   bool toplevel = file_scope == current_scope;
-  int saw_named_field;
 
   /* If this type was previously laid out as a forward reference,
      make sure we lay it out again.  */
@@ -7907,7 +7906,7 @@ finish_struct (location_t loc, tree t, tree fieldlist, tree attributes,
      type.  (Correct layout requires the original type to have been preserved
      until now.)  */
 
-  saw_named_field = 0;
+  bool saw_named_field = false;
   for (x = fieldlist; x; x = DECL_CHAIN (x))
     {
       if (TREE_TYPE (x) == error_mark_node)
@@ -7982,7 +7981,7 @@ finish_struct (location_t loc, tree t, tree fieldlist, tree attributes,
 
       if (DECL_NAME (x)
 	  || RECORD_OR_UNION_TYPE_P (TREE_TYPE (x)))
-	saw_named_field = 1;
+	saw_named_field = true;
     }
 
   detect_field_duplicates (fieldlist);
@@ -8518,11 +8517,10 @@ build_enumerator (location_t decl_loc, location_t loc,
    This function creates a binding context for the function body
    as well as setting up the FUNCTION_DECL in current_function_decl.
 
-   Returns 1 on success.  If the DECLARATOR is not suitable for a function
-   (it defines a datum instead), we return 0, which tells
-   yyparse to report a parse error.  */
+   Returns true on success.  If the DECLARATOR is not suitable for a function
+   (it defines a datum instead), we return false to report a parse error.  */
 
-int
+bool
 start_function (struct c_declspecs *declspecs, struct c_declarator *declarator,
 		tree attributes)
 {
@@ -8549,7 +8547,7 @@ start_function (struct c_declspecs *declspecs, struct c_declarator *declarator,
      cause a syntax error.  */
   if (decl1 == NULL_TREE
       || TREE_CODE (decl1) != FUNCTION_DECL)
-    return 0;
+    return false;
 
   loc = DECL_SOURCE_LOCATION (decl1);
 
@@ -8749,7 +8747,7 @@ start_function (struct c_declspecs *declspecs, struct c_declarator *declarator,
 
   start_fname_decls ();
 
-  return 1;
+  return true;
 }
 
 /* Subroutine of store_parm_decls which handles new-style function
@@ -9773,7 +9771,7 @@ declspecs_add_qual (source_location loc,
   gcc_assert (TREE_CODE (qual) == IDENTIFIER_NODE
 	      && C_IS_RESERVED_WORD (qual));
   i = C_RID_CODE (qual);
-  location_t prev_loc = 0;
+  location_t prev_loc = UNKNOWN_LOCATION;
   switch (i)
     {
     case RID_CONST:
diff --git a/gcc/c/c-tree.h b/gcc/c/c-tree.h
index 42172f8..17a8897 100644
--- a/gcc/c/c-tree.h
+++ b/gcc/c/c-tree.h
@@ -561,7 +561,7 @@ extern tree c_builtin_function_ext_scope (tree);
 extern void shadow_tag (const struct c_declspecs *);
 extern void shadow_tag_warned (const struct c_declspecs *, int);
 extern tree start_enum (location_t, struct c_enum_contents *, tree);
-extern int  start_function (struct c_declspecs *, struct c_declarator *, tree);
+extern bool start_function (struct c_declspecs *, struct c_declarator *, tree);
 extern tree start_decl (struct c_declarator *, struct c_declspecs *, bool,
 			tree);
 extern tree start_struct (location_t, enum tree_code, tree,
@@ -616,7 +616,7 @@ extern struct c_switch *c_switch_stack;
 
 extern tree c_objc_common_truthvalue_conversion (location_t, tree);
 extern tree require_complete_type (location_t, tree);
-extern int same_translation_unit_p (const_tree, const_tree);
+extern bool same_translation_unit_p (const_tree, const_tree);
 extern int comptypes (tree, tree);
 extern int comptypes_check_different_types (tree, tree, bool *);
 extern bool c_vla_type_p (const_tree);
diff --git a/gcc/c/c-typeck.c b/gcc/c/c-typeck.c
index 4c75c32..96f7a5c 100644
--- a/gcc/c/c-typeck.c
+++ b/gcc/c/c-typeck.c
@@ -105,7 +105,7 @@ static tree digest_init (location_t, tree, tree, tree, bool, bool, int);
 static void output_init_element (location_t, tree, tree, bool, tree, tree, int,
 				 bool, struct obstack *);
 static void output_pending_init_elements (int, struct obstack *);
-static int set_designator (location_t, int, struct obstack *);
+static bool set_designator (location_t, int, struct obstack *);
 static void push_range_stack (tree, struct obstack *);
 static void add_pending_init (location_t, tree, tree, tree, bool,
 			      struct obstack *);
@@ -1306,7 +1306,8 @@ comp_target_types (location_t location, tree ttl, tree ttr)
    If the CONTEXT chain ends in a null, that tree's context is still
    being parsed, so if two trees have context chains ending in null,
    they're in the same translation unit.  */
-int
+
+bool
 same_translation_unit_p (const_tree t1, const_tree t2)
 {
   while (t1 && TREE_CODE (t1) != TRANSLATION_UNIT_DECL)
@@ -8176,9 +8177,9 @@ pop_init_level (location_t loc, int implicit,
 }
 
 /* Common handling for both array range and field name designators.
-   ARRAY argument is nonzero for array ranges.  Returns zero for success.  */
+   ARRAY argument is nonzero for array ranges.  Returns false for success.  */
 
-static int
+static bool
 set_designator (location_t loc, int array,
 		struct obstack *braced_init_obstack)
 {
@@ -8188,12 +8189,12 @@ set_designator (location_t loc, int array,
   /* Don't die if an entire brace-pair level is superfluous
      in the containing level.  */
   if (constructor_type == NULL_TREE)
-    return 1;
+    return true;
 
   /* If there were errors in this designator list already, bail out
      silently.  */
   if (designator_erroneous)
-    return 1;
+    return true;
 
   if (!designator_depth)
     {
@@ -8207,7 +8208,7 @@ set_designator (location_t loc, int array,
 					      last_init_list_comma),
 			      true, braced_init_obstack);
       constructor_designated = 1;
-      return 0;
+      return false;
     }
 
   switch (TREE_CODE (constructor_type))
@@ -8229,18 +8230,18 @@ set_designator (location_t loc, int array,
   if (array && subcode != ARRAY_TYPE)
     {
       error_init (loc, "array index in non-array initializer");
-      return 1;
+      return true;
     }
   else if (!array && subcode != RECORD_TYPE && subcode != UNION_TYPE)
     {
       error_init (loc, "field name not in record or union initializer");
-      return 1;
+      return true;
     }
 
   constructor_designated = 1;
   finish_implicit_inits (loc, braced_init_obstack);
   push_init_level (loc, 2, braced_init_obstack);
-  return 0;
+  return false;
 }
 
 /* If there are range designators in designator list, push a new designator