PR c/68757: fix uninitialized src_range for various builtins

gcc/c/ChangeLog:
	PR c/68757
	* c-parser.c (c_parser_get_builtin_args): Add
	"out_close_paren_loc" param, and write back to it.
	(c_parser_postfix_expression): Capture the closing
	parenthesis location for RID_CHOOSE_EXPR,
	RID_BUILTIN_CALL_WITH_STATIC_CHAIN, RID_BUILTIN_COMPLEX,
	RID_BUILTIN_SHUFFLE and use it to set the source range
	for such expressions; within RID_BUILTIN_COMPLEX set
	the underlying location.

gcc/testsuite/ChangeLog:
	PR c/68757
	* gcc.dg/plugin/diagnostic-test-expressions-1.c
	(test_builtin_choose_expr): New test function.
	(test_builtin_call_with_static_chain): Likewise.
	(test_builtin_complex): Likewise.
	(test_builtin_shuffle): Likewise.

From-SVN: r231414

2 files changed, 40 insertions, 11 deletions

diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog
index 0b3351c..62d92c0 100644
--- a/gcc/c/ChangeLog
+++ b/gcc/c/ChangeLog
@@ -1,3 +1,15 @@
+2015-12-08  David Malcolm  <dmalcolm@redhat.com>
+
+	PR c/68757
+	* c-parser.c (c_parser_get_builtin_args): Add
+	"out_close_paren_loc" param, and write back to it.
+	(c_parser_postfix_expression): Capture the closing
+	parenthesis location for RID_CHOOSE_EXPR,
+	RID_BUILTIN_CALL_WITH_STATIC_CHAIN, RID_BUILTIN_COMPLEX,
+	RID_BUILTIN_SHUFFLE and use it to set the source range
+	for such expressions; within RID_BUILTIN_COMPLEX set
+	the underlying location.
+
 2015-12-07  Marek Polacek  <polacek@redhat.com>
 
 	PR c/68668
diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index c7d15f9..8ea0e95 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -6933,11 +6933,14 @@ c_parser_alignof_expression (c_parser *parser)
    for the middle-end nodes like COMPLEX_EXPR, VEC_PERM_EXPR and
    others.  The name of the builtin is passed using BNAME parameter.
    Function returns true if there were no errors while parsing and
-   stores the arguments in CEXPR_LIST.  */
+   stores the arguments in CEXPR_LIST.  If it returns true,
+   *OUT_CLOSE_PAREN_LOC is written to with the location of the closing
+   parenthesis.  */
 static bool
 c_parser_get_builtin_args (c_parser *parser, const char *bname,
 			   vec<c_expr_t, va_gc> **ret_cexpr_list,
-			   bool choose_expr_p)
+			   bool choose_expr_p,
+			   location_t *out_close_paren_loc)
 {
   location_t loc = c_parser_peek_token (parser)->location;
   vec<c_expr_t, va_gc> *cexpr_list;
@@ -6955,6 +6958,7 @@ c_parser_get_builtin_args (c_parser *parser, const char *bname,
 
   if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
     {
+      *out_close_paren_loc = c_parser_peek_token (parser)->location;
       c_parser_consume_token (parser);
       return true;
     }
@@ -6974,6 +6978,7 @@ c_parser_get_builtin_args (c_parser *parser, const char *bname,
       vec_safe_push (cexpr_list, expr);
     }
 
+  *out_close_paren_loc = c_parser_peek_token (parser)->location;
   if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
     return false;
 
@@ -7594,11 +7599,13 @@ c_parser_postfix_expression (c_parser *parser)
 	    vec<c_expr_t, va_gc> *cexpr_list;
 	    c_expr_t *e1_p, *e2_p, *e3_p;
 	    tree c;
+	    location_t close_paren_loc;
 
 	    c_parser_consume_token (parser);
 	    if (!c_parser_get_builtin_args (parser,
 					    "__builtin_choose_expr",
-					    &cexpr_list, true))
+					    &cexpr_list, true,
+					    &close_paren_loc))
 	      {
 		expr.value = error_mark_node;
 		break;
@@ -7626,6 +7633,7 @@ c_parser_postfix_expression (c_parser *parser)
 			" a constant");
 	    constant_expression_warning (c);
 	    expr = integer_zerop (c) ? *e3_p : *e2_p;
+	    set_c_expr_source_range (&expr, loc, close_paren_loc);
 	    break;
 	  }
 	case RID_TYPES_COMPATIBLE_P:
@@ -7677,11 +7685,13 @@ c_parser_postfix_expression (c_parser *parser)
 	    vec<c_expr_t, va_gc> *cexpr_list;
 	    c_expr_t *e2_p;
 	    tree chain_value;
+	    location_t close_paren_loc;
 
 	    c_parser_consume_token (parser);
 	    if (!c_parser_get_builtin_args (parser,
 					    "__builtin_call_with_static_chain",
-					    &cexpr_list, false))
+					    &cexpr_list, false,
+					    &close_paren_loc))
 	      {
 		expr.value = error_mark_node;
 		break;
@@ -7710,17 +7720,20 @@ c_parser_postfix_expression (c_parser *parser)
 			"must be a pointer type");
 	    else
 	      CALL_EXPR_STATIC_CHAIN (expr.value) = chain_value;
+	    set_c_expr_source_range (&expr, loc, close_paren_loc);
 	    break;
 	  }
 	case RID_BUILTIN_COMPLEX:
 	  {
 	    vec<c_expr_t, va_gc> *cexpr_list;
 	    c_expr_t *e1_p, *e2_p;
+	    location_t close_paren_loc;
 
 	    c_parser_consume_token (parser);
 	    if (!c_parser_get_builtin_args (parser,
 					    "__builtin_complex",
-					    &cexpr_list, false))
+					    &cexpr_list, false,
+					    &close_paren_loc))
 	      {
 		expr.value = error_mark_node;
 		break;
@@ -7765,11 +7778,12 @@ c_parser_postfix_expression (c_parser *parser)
 	      }
 	    pedwarn_c90 (loc, OPT_Wpedantic,
 			 "ISO C90 does not support complex types");
-	    expr.value = build2 (COMPLEX_EXPR,
-				 build_complex_type
-				   (TYPE_MAIN_VARIANT
-				     (TREE_TYPE (e1_p->value))),
-				 e1_p->value, e2_p->value);
+	    expr.value = build2_loc (loc, COMPLEX_EXPR,
+				     build_complex_type
+				     (TYPE_MAIN_VARIANT
+				      (TREE_TYPE (e1_p->value))),
+				     e1_p->value, e2_p->value);
+	    set_c_expr_source_range (&expr, loc, close_paren_loc);
 	    break;
 	  }
 	case RID_BUILTIN_SHUFFLE:
@@ -7777,11 +7791,13 @@ c_parser_postfix_expression (c_parser *parser)
 	    vec<c_expr_t, va_gc> *cexpr_list;
 	    unsigned int i;
 	    c_expr_t *p;
+	    location_t close_paren_loc;
 
 	    c_parser_consume_token (parser);
 	    if (!c_parser_get_builtin_args (parser,
 					    "__builtin_shuffle",
-					    &cexpr_list, false))
+					    &cexpr_list, false,
+					    &close_paren_loc))
 	      {
 		expr.value = error_mark_node;
 		break;
@@ -7808,6 +7824,7 @@ c_parser_postfix_expression (c_parser *parser)
 			       "%<__builtin_shuffle%>");
 		expr.value = error_mark_node;
 	      }
+	    set_c_expr_source_range (&expr, loc, close_paren_loc);
 	    break;
 	  }
 	case RID_AT_SELECTOR: