[C PATCH, committed] Use protected_set_expr_location more

[Marek Polacek <polacek@redhat.com>]

This patch makes the C FE use the protected_set_expr_location helper
where appropriate.

Bootstrapped/regtested on x86_64-linux, applying to trunk.

2015-10-06  Marek Polacek  <polacek@redhat.com>

	* c-parser.c (c_parser_statement_after_labels): Use
	protected_set_expr_location.
	(c_parser_omp_clause_num_gangs): Likewise.
	(c_parser_omp_clause_num_threads): Likewise.
	(c_parser_omp_clause_num_workers): Likewise.
	(c_parser_omp_clause_vector_length): Likewise.
	(c_parser_omp_clause_num_teams): Likewise.
	(c_parser_omp_clause_thread_limit): Likewise.
	* c-typeck.c (build_c_cast): Likewise.
	(c_cast_expr): Likewise.

diff --git gcc/c/c-parser.c gcc/c/c-parser.c
index 0df7d7b..2d24c21 100644
--- gcc/c/c-parser.c
+++ gcc/c/c-parser.c
@@ -5141,9 +5141,8 @@ c_parser_statement_after_labels (c_parser *parser, vec<tree> *chain)
      (recursively) all of the component statements should already have
      line numbers assigned.  ??? Can we discard no-op statements
      earlier?  */
-  if (CAN_HAVE_LOCATION_P (stmt)
-      && EXPR_LOCATION (stmt) == UNKNOWN_LOCATION)
-    SET_EXPR_LOCATION (stmt, loc);
+  if (EXPR_LOCATION (stmt) == UNKNOWN_LOCATION)
+    protected_set_expr_location (stmt, loc);
 
   parser->in_if_block = in_if_block;
 }
@@ -10681,8 +10680,7 @@ c_parser_omp_clause_num_gangs (c_parser *parser, tree list)
       /* Attempt to statically determine when the number isn't positive.  */
       c = fold_build2_loc (expr_loc, LE_EXPR, boolean_type_node, t,
 		       build_int_cst (TREE_TYPE (t), 0));
-      if (CAN_HAVE_LOCATION_P (c))
-	SET_EXPR_LOCATION (c, expr_loc);
+      protected_set_expr_location (c, expr_loc);
       if (c == boolean_true_node)
 	{
 	  warning_at (expr_loc, 0,
@@ -10726,8 +10724,7 @@ c_parser_omp_clause_num_threads (c_parser *parser, tree list)
       /* Attempt to statically determine when the number isn't positive.  */
       c = fold_build2_loc (expr_loc, LE_EXPR, boolean_type_node, t,
 		       build_int_cst (TREE_TYPE (t), 0));
-      if (CAN_HAVE_LOCATION_P (c))
-	SET_EXPR_LOCATION (c, expr_loc);
+      protected_set_expr_location (c, expr_loc);
       if (c == boolean_true_node)
 	{
 	  warning_at (expr_loc, 0,
@@ -10771,8 +10768,7 @@ c_parser_omp_clause_num_workers (c_parser *parser, tree list)
       /* Attempt to statically determine when the number isn't positive.  */
       c = fold_build2_loc (expr_loc, LE_EXPR, boolean_type_node, t,
 		       build_int_cst (TREE_TYPE (t), 0));
-      if (CAN_HAVE_LOCATION_P (c))
-	SET_EXPR_LOCATION (c, expr_loc);
+      protected_set_expr_location (c, expr_loc);
       if (c == boolean_true_node)
 	{
 	  warning_at (expr_loc, 0,
@@ -11116,8 +11112,7 @@ c_parser_omp_clause_vector_length (c_parser *parser, tree list)
       /* Attempt to statically determine when the number isn't positive.  */
       c = fold_build2_loc (expr_loc, LE_EXPR, boolean_type_node, t,
 		       build_int_cst (TREE_TYPE (t), 0));
-      if (CAN_HAVE_LOCATION_P (c))
-	SET_EXPR_LOCATION (c, expr_loc);
+      protected_set_expr_location (c, expr_loc);
       if (c == boolean_true_node)
 	{
 	  warning_at (expr_loc, 0,
@@ -11193,8 +11188,7 @@ c_parser_omp_clause_num_teams (c_parser *parser, tree list)
       /* Attempt to statically determine when the number isn't positive.  */
       c = fold_build2_loc (expr_loc, LE_EXPR, boolean_type_node, t,
 			   build_int_cst (TREE_TYPE (t), 0));
-      if (CAN_HAVE_LOCATION_P (c))
-	SET_EXPR_LOCATION (c, expr_loc);
+      protected_set_expr_location (c, expr_loc);
       if (c == boolean_true_node)
 	{
 	  warning_at (expr_loc, 0, "%<num_teams%> value must be positive");
@@ -11237,8 +11231,7 @@ c_parser_omp_clause_thread_limit (c_parser *parser, tree list)
       /* Attempt to statically determine when the number isn't positive.  */
       c = fold_build2_loc (expr_loc, LE_EXPR, boolean_type_node, t,
 			   build_int_cst (TREE_TYPE (t), 0));
-      if (CAN_HAVE_LOCATION_P (c))
-	SET_EXPR_LOCATION (c, expr_loc);
+      protected_set_expr_location (c, expr_loc);
       if (c == boolean_true_node)
 	{
 	  warning_at (expr_loc, 0, "%<thread_limit%> value must be positive");
diff --git gcc/c/c-typeck.c gcc/c/c-typeck.c
index 10cad36..df3245a4 100644
--- gcc/c/c-typeck.c
+++ gcc/c/c-typeck.c
@@ -5216,8 +5216,7 @@ build_c_cast (location_t loc, tree type, tree expr)
 	       || TREE_CODE (expr) == COMPLEX_CST)))
       value = build1 (NOP_EXPR, type, value);
 
-  if (CAN_HAVE_LOCATION_P (value))
-    SET_EXPR_LOCATION (value, loc);
+  protected_set_expr_location (value, loc);
   return value;
 }
 
@@ -5255,8 +5254,8 @@ c_cast_expr (location_t loc, struct c_type_name *type_name, tree expr)
       SET_EXPR_LOCATION (ret, loc);
     }
 
-  if (CAN_HAVE_LOCATION_P (ret) && !EXPR_HAS_LOCATION (ret))
-    SET_EXPR_LOCATION (ret, loc);
+  if (!EXPR_HAS_LOCATION (ret))
+    protected_set_expr_location (ret, loc);
 
   /* C++ does not permits types to be defined in a cast, but it
      allows references to incomplete types.  */

	Marek