https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109005
--- Comment #10 from Iain Sandoe <iains at gcc dot gnu.org> ---
with a debug build on darwin19:
#2 0x000000010249e5a5 in make_ssa_name_fn (fn=0x11104b170, var=0x10771d1f8,
stmt=0x0, version=0) at /src-local/gcc-master/gcc/tree-ssanames.cc:357
357 gcc_assert (VAR_P (var)
(gdb) p debug_tree(var)
<array_type 0x10771d1f8
type <integer_type 0x10711c348 character public unsigned QI
size <integer_cst 0x107102d38 constant 8>
unit-size <integer_cst 0x107102d50 constant 1>
align:8 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x10711c348 precision:8 min <integer_cst 0x107102d68 0> max <integer_cst
0x107102d08 255>
pointer_to_this <pointer_type 0x107180c78>>
QI size <integer_cst 0x107102d38 8> unit-size <integer_cst 0x107102d50 1>
align:8 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x10771d1f8
domain <integer_type 0x107128b28
type <integer_type 0x10711c000 sizetype public unsigned DI
size <integer_cst 0x107102c48 constant 64>
unit-size <integer_cst 0x107102c60 constant 8>
align:64 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x10711c000 precision:64 min <integer_cst 0x107102c78 0> max <integer_cst
0x107103ee0 18446744073709551615>>
DI size <integer_cst 0x107102c48 64> unit-size <integer_cst 0x107102c60
8>
align:64 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x107128b28 precision:64 min <integer_cst 0x107102c78 0> max <integer_cst
0x107102c78 0>>>
(gdb) p is_gimple_reg_type(var)
$3 = false
