https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102760

            Bug ID: 102760
           Summary: ICE: in decompose, at wide-int.h:984
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: cnsun at uwaterloo dot ca
  Target Milestone: ---

$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/scratch/software/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/configure
--enable-languages=c,c++,lto --enable-checking-yes --enable-multiarch
--prefix=/scratch/software/gcc-trunk --disable-bootstrap
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20211014 (experimental) [master -gee9fa8a57] (GCC)

$ cat mutant.c
int isascii(enum mm2);
f1(char *type) { isascii(*type); }

$ gcc-trunk -w mutant.c
mutant.c: In function ‘f1’:
mutant.c:2:26: error: type of formal parameter 1 is incomplete
    2 | f1(char *type) { isascii(*type); }
      |                          ^~~~~
mutant.c:2:18: internal compiler error: in decompose, at wide-int.h:984
    2 | f1(char *type) { isascii(*type); }
      |                  ^~~~~~~~~~~~~~
0x84c5a6 wi::int_traits<generic_wide_int<wide_int_ref_storage<false, false> >
>::decompose(long*, unsigned int, generic_wide_int<wide_int_ref_storage<false,
false> > const&)
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/wide-int.h:984
0x87be6e wi::int_traits<generic_wide_int<wide_int_ref_storage<false, false> >
>::decompose(long*, unsigned int, generic_wide_int<wide_int_ref_storage<false,
false> > const&)
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/tree.h:3612
0x87be6e wide_int_ref_storage<false,
false>::wide_int_ref_storage<generic_wide_int<wide_int_ref_storage<false,
false> > >(generic_wide_int<wide_int_ref_storage<false, false> > const&,
unsigned int)
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/wide-int.h:1034
0x87be6e generic_wide_int<wide_int_ref_storage<false, false>
>::generic_wide_int<generic_wide_int<wide_int_ref_storage<false, false> >
>(generic_wide_int<wide_int_ref_storage<false, false> > const&, unsigned int)
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/wide-int.h:790
0x87be6e wi::binary_traits<generic_wide_int<wide_int_storage>,
generic_wide_int<wide_int_ref_storage<false, false> >,
wi::int_traits<generic_wide_int<wide_int_storage> >::precision_type,
wi::int_traits<generic_wide_int<wide_int_ref_storage<false, false> >
>::precision_type>::result_type
wi::bit_and_not<generic_wide_int<wide_int_storage>,
generic_wide_int<wide_int_ref_storage<false, false> >
>(generic_wide_int<wide_int_storage> const&,
generic_wide_int<wide_int_ref_storage<false, false> > const&)
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/wide-int.h:2343
0x87be6e gimple_simplify_BIT_AND_EXPR
       
/tmp/tmp.gzh6IUhxke-gcc-builder/gcc-build-trunk/gcc/gimple-match.c:124016
0x15a7906 gimple_simplify
       
/tmp/tmp.gzh6IUhxke-gcc-builder/gcc-build-trunk/gcc/gimple-match.c:142649
0x15a930c gimple_resimplify2
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/gimple-match-head.c:320
0x15d451a gimple_simplify(gimple*, gimple_match_op*, gimple**, tree_node*
(*)(tree_node*), tree_node* (*)(tree_node*))
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/gimple-match-head.c:959
0xc68926 fold_stmt_1
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/gimple-fold.c:6212
0xca9b40 gimplify_modify_expr
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/gimplify.c:6129
0xc9c7d3 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/gimplify.c:14584
0xca04da gimplify_stmt(tree_node**, gimple**)
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/gimplify.c:7018
0xca26c6 gimplify_and_add(tree_node*, gimple**)
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/gimplify.c:494
0xca26c6 internal_get_tmp_var
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/gimplify.c:647
0xc9bdf7 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/gimplify.c:15587
0xc9c67a gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/gimplify.c:15350
0xca04da gimplify_stmt(tree_node**, gimple**)
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/gimplify.c:7018
0xca0d0e gimplify_bind_expr
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/gimplify.c:1426
0xc9d00c gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        /tmp/tmp.gzh6IUhxke-gcc-builder/gcc/gcc/gimplify.c:14785
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

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