https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84739
--- Comment #1 from G. Steinmetz <gs...@t-online.de> ---
Configured with --enable-checking=yes :
$ gcc-8-20180304 -O2 -c z1.c
z1.c:1:13: warning: 'baz' alias between functions of incompatible types
'void(void)' and 'void(int, int)' [-Wattribute-alias]
static void baz (void) __attribute__((weakref("bar")));
^~~
z1.c:14:1: note: aliased declaration here
bar (int x, int y)
^~~
during GIMPLE pass: tailr
z1.c: In function 'bar':
z1.c:19:1: internal compiler error: in gimple_call_arg, at gimple.h:3179
}
^
0xecae86 gimple_call_arg
../../gcc/gimple.h:3179
0xecae86 gimple_call_arg
../../gcc/gimple.h:3187
0xecae86 eliminate_tail_call
../../gcc/tree-tailcall.c:921
0xecae86 optimize_tail_call
../../gcc/tree-tailcall.c:953
0xecae86 tree_optimize_tail_calls_1
../../gcc/tree-tailcall.c:1082
