[Bug c/111836] New: gcc: internal compiler error: in get_expr_operands, at tree-ssa-operands.cc

[Bug c/111836] New: gcc: internal compiler error: in get_expr_operands, at tree-ssa-operands.cc

[congli at smail dot nju.edu.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111836

            Bug ID: 111836
           Summary: gcc: internal compiler error: in get_expr_operands, at
                    tree-ssa-operands.cc
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: congli at smail dot nju.edu.cn
  Target Milestone: ---

Compiler explorer: https://godbolt.org/z/v3q61PETv.

The following program `small.c` triggers a crash in gcc-14:

``` sh
% cat small.c
void __GIMPLE (ssa) t () {
  i = __PHI (__BB6: _Literal (i32) 1, __BB4: j);
}

% gcc-tk -O0 small.c
<source>:1:6: error: '__GIMPLE' only valid with '-fgimple'
    1 | void __GIMPLE (ssa) t () {
      |      ^~~~~~~~
<source>: In function 't':
<source>:2:3: error: 'i' undeclared (first use in this function)
    2 |   i = __PHI (__BB6: _Literal (i32) 1, __BB4: j);
      |   ^
<source>:2:3: note: each undeclared identifier is reported only once for each
function it appears in
<source>:2:31: error: unknown type name 'i32'
    2 |   i = __PHI (__BB6: _Literal (i32) 1, __BB4: j);
      |                               ^~~
<source>:2:46: error: 'j' undeclared (first use in this function)
    2 |   i = __PHI (__BB6: _Literal (i32) 1, __BB4: j);
      |                                              ^
unhandled expression in get_expr_operands():
 <error_mark 0x7fa8abdfaf18>

<source>:3:1: internal compiler error: in get_expr_operands, at
tree-ssa-operands.cc:940
    3 | }
      | ^
0x230184e internal_error(char const*, ...)
  ???:0
0x9fb842 fancy_abort(char const*, int, char const*)
  ???:0
0x12e301d operands_scanner::get_expr_operands(tree_node**, int)
  ???:0
0x12e35c2 operands_scanner::parse_ssa_operands()
  ???:0
0x12e43ea operands_scanner::build_ssa_operands()
  ???:0
0x12e4634 update_stmt_operands(function*, gimple*)
  ???:0
0xd62007 update_modified_stmts(gimple*)
  ???:0
0xd620e9 gsi_insert_seq_after(gimple_stmt_iterator*, gimple*,
gsi_iterator_update)
  ???:0
0xaad40e c_parser_parse_gimple_body(c_parser*, char*, c_declspec_il,
profile_count)
  ???:0
0xaa3dfd c_parse_file()
  ???:0
0xb17139 c_common_parse_file()
  ???:0
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
```

GCC version:

```
gcc
(Compiler-Explorer-Build-gcc-d5cfabc677b08f38ea5d5f85deeda746b4fabb88-binutils-2.40)
14.0.0 20231016 (experimental)
Copyright (C) 2023 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
```

[Bug c/111836] ICE with undefined types and undefined variables with _GIMPLE and starting at ssa

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111836

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
             Blocks|                            |101057
   Last reconfirmed|                            |2023-10-17
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101057
[Bug 101057] [gimplefe] GIMPLE frontend issues