https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100529
--- Comment #1 from Chengnian Sun <cnsun at uwaterloo dot ca> ---
A possible duplicate.
$ 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.FUbEknNORK-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 20210511 (experimental) [master revision
:7db32cac8:aa891c56f25baac94db004e309d1b6e40b770a95] (GCC)
$ cat mutant.c
bar(n) { return foo(n, 2.0); }
foo(
int n, struct { char a[n]; }) {
return foo;
}
$ gcc-trunk -O3 mutant.c
mutant.c:1:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
1 | bar(n) { return foo(n, 2.0); }
| ^~~
mutant.c: In function ‘bar’:
mutant.c:1:1: warning: type of ‘n’ defaults to ‘int’ [-Wimplicit-int]
mutant.c:1:17: warning: implicit declaration of function ‘foo’
[-Wimplicit-function-declaration]
1 | bar(n) { return foo(n, 2.0); }
| ^~~
mutant.c: At top level:
mutant.c:3:12: warning: anonymous struct declared inside parameter list will
not be visible outside of this definition or declaration
3 | int n, struct { char a[n]; }) {
| ^~~~~~
mutant.c:2:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
2 | foo(
| ^~~
mutant.c: In function ‘foo’:
mutant.c:4:10: warning: returning ‘int (*)(int, struct <anonymous>)’ from a
function with return type ‘int’ makes integer from pointer without a cast
[-Wint-conversion]
4 | return foo;
| ^~~
In function ‘foo.constprop’:
cc1: internal compiler error: in force_constant_size, at gimplify.c:733
0x6d5542 force_constant_size
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimplify.c:733
0xc21537 gimple_add_tmp_var(tree_node*)
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimplify.c:771
0xbea82b create_tmp_var(tree_node*, char const*)
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimple-expr.c:485
0xc2b230 create_tmp_from_val
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimplify.c:564
0xc2b230 lookup_tmp_var
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimplify.c:596
0xc2b230 internal_get_tmp_var
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimplify.c:635
0xc24bb7 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimplify.c:15072
0xc49b43 gimple_regimplify_operands(gimple*, gimple_stmt_iterator*)
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimplify-me.c:235
0xf7689a insert_init_stmt
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/tree-inline.c:3377
0xf88e47 tree_function_versioning(tree_node*, tree_node*, vec<ipa_replace_map*,
va_gc, vl_embed>*, ipa_param_adjustments*, bool, bitmap_head*,
basic_block_def*)
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/tree-inline.c:6418
0xa83c85 cgraph_node::materialize_clone()
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/cgraphclones.c:1131
0xe0b8f8 execute_all_ipa_transforms(bool)
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/passes.c:2329
0xa7de49 cgraph_node::expand()
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/cgraphunit.c:1821
0xa7f26f expand_all_functions
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/cgraphunit.c:1992
0xa7f26f symbol_table::compile()
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/cgraphunit.c:2356
0xa8214b symbol_table::compile()
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/cgraphunit.c:2269
0xa8214b symbol_table::finalize_compilation_unit()
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/cgraphunit.c:2537
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.
