Bootstrap failure due to your fix for PR 26122

[Volker Reichelt]

Mark,

your patch for PR26122 causes a bootstrap failure on mainline
(x86_64-unknown-linux-gnu) when compiling cp/parser.c:

cc1: warnings being treated as errors
../../gcc/gcc/cp/parser.c: In function 'cp_parser_init_declarator':
../../gcc/gcc/cp/parser.c:10895: warning: 'is_parenthesized_init' may be used uninitialized in this function
make[3]: *** [cp/parser.o] Error 1

Well, you didn't really break it, but your change probably exposed the
latent problem.

The culprit is in the following excerpt from cp_parser_init_declarator:

  /* Parse the initializer.  */
  if (is_initialized)
    {
      if (declarator->kind == cdk_function
	  && declarator->declarator->kind == cdk_id
	  && initialization_kind == CPP_EQ)
	initializer = cp_parser_pure_specifier (parser);
      else
	initializer = cp_parser_initializer (parser,
					     &is_parenthesized_init,
					     &is_non_constant_init);
    }
  else
    {
      initializer = NULL_TREE;
      is_parenthesized_init = false;
      is_non_constant_init = true;
    }

If both if-conditions are true, is_parenthesized_init isn't initialized.
This also holds for is_non_constant_init, but the middle-end does not
catch that (yet). Maybe the whole outer else branch should be removed
and the variables be initialized at definition time.

Regards,
Volker