[PATCH] c: Fix up c_parser_has_attribute_expression [PR101176]

[Jakub Jelinek via Gcc-patches]

Hi!

This function keeps src_range member of the result uninitialized, which at
least under valgrind can show up later when those uninitialized location_t's
can make it into the IL or location_t hash tables.

Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux, ok for
trunk?

2021-06-24  Jakub Jelinek  <ja...@redhat.com>

        PR c/101176
        * c-parser.c (c_parser_has_attribute_expression): Set source range for
        the result.

--- gcc/c/c-parser.c.jj 2021-06-23 13:33:00.374434233 +0200
+++ gcc/c/c-parser.c    2021-06-23 23:53:45.146083923 +0200
@@ -8406,6 +8406,7 @@ c_parser_has_attribute_expression (c_par
 {
   gcc_assert (c_parser_next_token_is_keyword (parser,
                                              RID_BUILTIN_HAS_ATTRIBUTE));
+  location_t start = c_parser_peek_token (parser)->location;
   c_parser_consume_token (parser);
 
   c_inhibit_evaluation_warnings++;
@@ -8484,6 +8485,7 @@ c_parser_has_attribute_expression (c_par
 
   parser->translate_strings_p = save_translate_strings_p;
 
+  location_t finish = c_parser_peek_token (parser)->location;
   if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
     c_parser_consume_token (parser);
   else
@@ -8512,6 +8514,7 @@ c_parser_has_attribute_expression (c_par
   else
     result.value =  boolean_false_node;
 
+  set_c_expr_source_range (&result, start, finish);
   return result;
 }
 

        Jakub