https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98099
Bug ID: 98099
Summary: ICE in gen_lowpart_common, at emit-rtl.c:1554
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gs...@t-online.de
Target Milestone: ---
Affects versions down to r6 :
$ cat z1.c
struct S { _Decimal128 a; };
_Decimal128 f (struct S x)
{
return x.a;
}
$ gcc-11-20201129 -c z1.c -m32 -fsso-struct=big-endian
during RTL pass: expand
z1.c: In function 'f':
z1.c:5:11: internal compiler error: Segmentation fault
5 | return x.a;
| ~^~
0xb49eaf crash_signal
../../gcc/toplev.c:330
0x825a2f gen_lowpart_common(machine_mode, rtx_def*)
../../gcc/emit-rtl.c:1554
0xafa9ec gen_lowpart_general(machine_mode, rtx_def*)
../../gcc/rtlhooks.c:48
0x83ef31 extract_bit_field_1
../../gcc/expmed.c:1826
0x83f7ff extract_bit_field(rtx_def*, poly_int<1u, unsigned long>, poly_int<1u,
unsigned long>, int, rtx_def*, machine_mode, machine_mode, bool, rtx_def**)
../../gcc/expmed.c:2119
0x84e8ca expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:11113
0x859e43 store_expr(tree_node*, rtx_def*, int, bool, bool)
../../gcc/expr.c:5859
0x85b206 expand_assignment(tree_node*, tree_node*, bool)
../../gcc/expr.c:5595
0x750c10 expand_gimple_stmt_1
../../gcc/cfgexpand.c:3901
0x750c10 expand_gimple_stmt
../../gcc/cfgexpand.c:3999
0x755e07 expand_gimple_basic_block
../../gcc/cfgexpand.c:6040
0x758476 execute
../../gcc/cfgexpand.c:6724
