[Bug c/70436] [4.9/5/6 Regression] -Wparentheses missing ambiguous else warning

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70436

--- Comment #16 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Apr 13 16:00:52 2016
New Revision: 234949

URL: https://gcc.gnu.org/viewcvs?rev=234949&root=gcc&view=rev
Log:
        PR c/70436
        * c-parser.c (c_parser_statement_after_labels): Add IF_P argument and
        adjust callers.
        (c_parser_statement): Likewise.
        (c_parser_c99_block_statement): Likewise.
        (c_parser_while_statement): Likewise.
        (c_parser_for_statement): Likewise.
        (c_parser_if_body): Don't set IF_P here.
        (c_parser_if_statement): Add IF_P argument.  Set IF_P here.  Warn
        about dangling else here.
        * c-tree.h (c_finish_if_stmt): Adjust declaration.
        * c-typeck.c (c_finish_if_stmt): Remove NESTED_IF parameter.  Don't
        warn about dangling else here.

        * testsuite/gcc.dg/Wparentheses-12.c: New test.
        * testsuite/gcc.dg/Wparentheses-13.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/Wparentheses-12.c
    trunk/gcc/testsuite/gcc.dg/Wparentheses-13.c
Modified:
    trunk/gcc/c/ChangeLog
    trunk/gcc/c/c-parser.c
    trunk/gcc/c/c-tree.h
    trunk/gcc/c/c-typeck.c
    trunk/gcc/testsuite/ChangeLog