[Bug c++/59832] New: [c++11][4.8, 4.9] ICE in reshape_init_class with initializer list

[Bug c++/59832] New: [c++11][4.8, 4.9] ICE in reshape_init_class with initializer list

[ppluzhnikov at google dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59832

            Bug ID: 59832
           Summary: [c++11][4.8, 4.9] ICE in reshape_init_class with
                    initializer list
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ppluzhnikov at google dot com

Google ref b/12545403

/// -- cut ---
struct A
{
  struct B
  {
    int aa;
    int bb;
  };
  B cc;
};

void Fn1 (const A &);

void
Fn2 ()
{
  Fn1 ( { { bb: 0 } });
}
/// -- cut ---

Using trunk:
g++ (GCC) 4.9.0 20140110 (experimental)

g++ -c -g -std=c++11 t.ii
t.ii: In function ‘void Fn2()’:
t.ii:16:22: internal compiler error: in reshape_init_class, at cp/decl.c:5267
   Fn1 ( { { bb: 0 } });
                      ^
0x56de5d reshape_init_class
        ../../gcc/cp/decl.c:5267
0x56de5d reshape_init_r
        ../../gcc/cp/decl.c:5493
0x56d026 reshape_init(tree_node*, tree_node*, int)
        ../../gcc/cp/decl.c:5537
0x55364f build_aggr_conv
        ../../gcc/cp/call.c:885
0x55364f implicit_conversion
        ../../gcc/cp/call.c:1757
0x5587d6 can_convert_arg(tree_node*, tree_node*, tree_node*, int, int)
        ../../gcc/cp/call.c:8948
0x5536e5 build_aggr_conv
        ../../gcc/cp/call.c:910
0x5536e5 implicit_conversion
        ../../gcc/cp/call.c:1757
0x554041 reference_binding
        ../../gcc/cp/call.c:1464
0x552e5c implicit_conversion
        ../../gcc/cp/call.c:1698
0x555112 add_function_candidate
        ../../gcc/cp/call.c:2002
0x551836 add_candidates
        ../../gcc/cp/call.c:5094
0x558b82 perform_overload_resolution
        ../../gcc/cp/call.c:3819
0x55f68a build_new_function_call(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, bool, int)
        ../../gcc/cp/call.c:3896
0x6d9711 finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
        ../../gcc/cp/semantics.c:2281
0x65c73e cp_parser_postfix_expression
        ../../gcc/cp/parser.c:6171
0x65f418 cp_parser_unary_expression
        ../../gcc/cp/parser.c:7177
0x6600af cp_parser_binary_expression
        ../../gcc/cp/parser.c:7881
0x6605a1 cp_parser_assignment_expression
        ../../gcc/cp/parser.c:8119
0x662534 cp_parser_expression
        ../../gcc/cp/parser.c:8281
Please submit a full bug report,


Without -std=c++11, same crash after warning:

g++ -c -g  t.ii
t.ii: In function ‘void Fn2()’:
t.ii:16:7: warning: extended initializer lists only available with -std=c++11
or -std=gnu++11 [enabled by default]
   Fn1 ( { { bb: 0 } });
       ^
t.ii:16:22: warning: extended initializer lists only available with -std=c++11
or -std=gnu++11 [enabled by default]
   Fn1 ( { { bb: 0 } });
                      ^
t.ii:16:22: internal compiler error: in reshape_init_class, at cp/decl.c:5267
0x56de5d reshape_init_class
        ../../gcc/cp/decl.c:5267
...
>From gcc-bugs-return-440467-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jan 15 17:33:22 2014
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Subject: [Bug rtl-optimization/59511] [4.9 Regression] FAIL: gcc.target/i386/pr36222-1.c scan-assembler-not movdqa with -mtune=corei7
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idY511

--- Comment #4 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Author: vmakarov
Date: Wed Jan 15 17:32:47 2014
New Revision: 206636

URL: http://gcc.gnu.org/viewcvs?rev 6636&root=gcc&view=rev
Log:
2014-01-15  Vladimir Makarov  <vmakarov@redhat.com>

    PR rtl-optimization/59511
    * ira.c (ira_init_register_move_cost): Use memory costs for some
    cases of register move cost calculations.
    * lra-constraints.c (lra_constraints): Use REG_FREQ_FROM_BB
    instead of BB frequency.
    * lra-coalesce.c (move_freq_compare_func, lra_coalesce): Ditto.
    * lra-assigns.c (find_hard_regno_for): Ditto.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ira.c
    trunk/gcc/lra-assigns.c
    trunk/gcc/lra-coalesce.c
    trunk/gcc/lra-constraints.c

[Bug c++/59832] [c++11] ICE in reshape_init_class with initializer list

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59832

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-01-17
            Version|unknown                     |4.9.0
            Summary|[c++11][4.8, 4.9] ICE in    |[c++11] ICE in
                   |reshape_init_class with     |reshape_init_class with
                   |initializer list            |initializer list
     Ever confirmed|0                           |1

[Bug c++/59832] [c++11] ICE in reshape_init_class with initializer list

[sam at wavestore dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59832

Sam Kellett <sam at wavestore dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sam at wavestore dot com

--- Comment #1 from Sam Kellett <sam at wavestore dot com> ---
Created attachment 32048
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32048&action=edit
Preprocessed source

I think this is another example of the same bug:

#include <vector>
struct Message
{
  typedef union {
    char byte;
    const char *str;
  } Parameter;

  Parameter p1;
  Parameter p2;
};

int main()
{
  std::vector<Message> messages_;

  messages_.push_back({{ .byte = 'a' }});

  Message message = {{ .byte = 'a' }, { .str = "Hello World" }};
  messages_.push_back(message);

  messages_.push_back({{ .byte = 'a' }, { .str = "Hello World" }});
}

Outputs:

union.cpp: In function ‘int main()’:
union.cpp:23:66: internal compiler error: in reshape_init_class, at
cp/decl.c:5216
   messages_.push_back({{ .byte = 'a' }, { .str = "Hello World" }});
                                                                  ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugzilla.redhat.com/bugzilla> for instructions.
Preprocessed source stored into /tmp/ccbxyQRY.out file, please attach this to
your bugreport.
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Subject: [Bug c++/59832] [c++11] ICE in reshape_init_class with initializer list
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idY832

--- Comment #2 from Sam Kellett <sam at wavestore dot com> ---
Using gcc v4.8.2 I should add...

[Bug c++/59832] [c++11] ICE in reshape_init_class with initializer list

[ppluzhnikov at google dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59832

--- Comment #3 from Paul Pluzhnikov <ppluzhnikov at google dot com> ---
Still reproduces on current trunk at r210049

[Bug c++/59832] [c++11] ICE in reshape_init_class with initializer list

[ppluzhnikov at google dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59832

--- Comment #4 from Paul Pluzhnikov <ppluzhnikov at google dot com> ---
Still reproduces on current trunk @r211286

[Bug c++/59832] [c++11] ICE in reshape_init_class with initializer list

[ppluzhnikov at google dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59832

--- Comment #5 from Paul Pluzhnikov <ppluzhnikov at google dot com> ---
Still broken on trunk @r211990.

Any chance someone can look at this?

[Bug c++/59832] [c++11] ICE in reshape_init_class with initializer list

[ppluzhnikov at google dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59832

--- Comment #7 from Paul Pluzhnikov <ppluzhnikov at google dot com> ---
Still broken on trunk @r221169.

Leaving known ICEs for >= 1 year untouched seems... suboptimal.
(Sorry I don't know enough GCC internals to take this on.)