[gcc r12-1791] c: Fix up c_parser_has_attribute_expression [PR101176]

[gcc r12-1791] c: Fix up c_parser_has_attribute_expression [PR101176]

[Jakub Jelinek]

https://gcc.gnu.org/g:178fb8df9315f2f8f45b7fe5faf11a9c2912cc28

commit r12-1791-g178fb8df9315f2f8f45b7fe5faf11a9c2912cc28
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu Jun 24 15:58:02 2021 +0200

    c: Fix up c_parser_has_attribute_expression [PR101176]
    
    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.
    
    2021-06-24  Jakub Jelinek  <jakub@redhat.com>
    
            PR c/101176
            * c-parser.c (c_parser_has_attribute_expression): Set source range for
            the result.

Diff:
---
 gcc/c/c-parser.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index c0f702049bb..27034f88f49 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -8406,6 +8406,7 @@ c_parser_has_attribute_expression (c_parser *parser)
 {
   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_parser *parser)
 
   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_parser *parser)
   else
     result.value =  boolean_false_node;
 
+  set_c_expr_source_range (&result, start, finish);
   return result;
 }