[Bug c/97125] [11 Regression] new problem with -Wduplicated-branches

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97125

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org
   Target Milestone|---                         |11.0
           Keywords|                            |ice-on-valid-code
            Summary|new problem with            |[11 Regression] new problem
                   |-Wduplicated-branches       |with -Wduplicated-branches

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r11-3302.

$ ./cc1 -quiet 97125.C -Wduplicated-branches
97125.C: In function ‘a’:
97125.C:11:1: internal compiler error: in hash_operand, at fold-const.c:3768
   11 | }
      | ^
0xd67ede operand_compare::hash_operand(tree_node const*, inchash::hash&,
unsigned int)
        /home/mpolacek/src/gcc/gcc/fold-const.c:3768
0xd6853c operand_compare::hash_operand(tree_node const*, inchash::hash&,
unsigned int)
        /home/mpolacek/src/gcc/gcc/fold-const.c:3858
0xd686fa inchash::add_expr(tree_node const*, inchash::hash&, unsigned int)
        /home/mpolacek/src/gcc/gcc/fold-const.c:3919
0xac5f4c do_warn_duplicated_branches
        /home/mpolacek/src/gcc/gcc/c-family/c-warn.c:2768
0xac6068 do_warn_duplicated_branches_r(tree_node**, int*, void*)
        /home/mpolacek/src/gcc/gcc/c-family/c-warn.c:2790
0x1725206 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*,
tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*))
        /home/mpolacek/src/gcc/gcc/tree.c:12001
0x17269ee walk_tree_without_duplicates_1(tree_node**, tree_node*
(*)(tree_node**, int*, void*), void*, tree_node* (*)(tree_node**, int*,
tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false,
default_hash_traits<tree_node*> >*))
        /home/mpolacek/src/gcc/gcc/tree.c:12362
0xa67f30 c_genericize(tree_node*)
        /home/mpolacek/src/gcc/gcc/c-family/c-gimplify.c:537
0x951b29 finish_function(unsigned int)
        /home/mpolacek/src/gcc/gcc/c/c-decl.c:10219
0x9b66b7 c_parser_declaration_or_fndef
        /home/mpolacek/src/gcc/gcc/c/c-parser.c:2562
0x9b4a36 c_parser_external_declaration
        /home/mpolacek/src/gcc/gcc/c/c-parser.c:1777
0x9b4598 c_parser_translation_unit
        /home/mpolacek/src/gcc/gcc/c/c-parser.c:1650
0x9f28ef c_parse_file()
        /home/mpolacek/src/gcc/gcc/c/c-parser.c:21821
0xa8237d c_common_parse_file()
        /home/mpolacek/src/gcc/gcc/c-family/c-opts.c:1188