https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106742
Bug ID: 106742
Summary: ICE in gen_lowpart_general, at rtlhooks.cc:57, or ICE
in expand_vec_perm_broadcast_1, at
config/i386/i386-expand.cc:21870
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-unknown-linux-gnu
1. gcc 13.0.0 20220821 snapshot (g:d6a39c25c05c6ed5df8ce49eda719d17e40e29bb)
ICEs when compiling the following testcase, reduced from
gcc/testsuite/gcc.target/i386/vect-bfloat16-2a.c, w/ -O1:
typedef __bf16 v8bf __attribute__ ((__vector_size__ (16)));
v8bf
vec_init_dup_v8bf (__bf16 a1)
{
return __extension__ (v8bf) { a1, a1, a1, a1, a1, a1, a1, a1 };
}
% x86_64-unknown-linux-gnu-gcc-13.0.0 -O1 -c miuyjavi.c
during RTL pass: expand
miuyjavi.c: In function 'vec_init_dup_v8bf':
miuyjavi.c:6:10: internal compiler error: in gen_lowpart_general, at
rtlhooks.cc:57
6 | return __extension__ (v8bf) { a1, a1, a1, a1, a1, a1, a1, a1 };
| ^~~~~~~~~~~~~
0x72fbae gen_lowpart_general(machine_mode, rtx_def*)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/rtlhooks.cc:57
0x136df8b ix86_expand_vector_init_duplicate(bool, machine_mode, rtx_def*,
rtx_def*)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/config/i386/i386-expand.cc:15044
0x1371b6b ix86_expand_vector_init(bool, rtx_def*, rtx_def*)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/config/i386/i386-expand.cc:16090
0x1a3c5ad ???
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/config/i386/sse.md:26600
0xb347a8 rtx_insn* insn_gen_fn::operator()<rtx_def*, rtx_def*>(rtx_def*,
rtx_def*) const
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/recog.h:407
0xb347a8 store_constructor(tree_node*, rtx_def*, int, poly_int<1u, long>, bool)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/expr.cc:7407
0xb3760d expand_constructor
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/expr.cc:8745
0xb23daa expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/expr.cc:10990
0xb24d66 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/expr.cc:10629
0x9f0bac expand_expr
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/expr.h:310
0x9f0bac expand_return
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/cfgexpand.cc:3809
0x9f0bac expand_gimple_stmt_1
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/cfgexpand.cc:3918
0x9f0bac expand_gimple_stmt
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/cfgexpand.cc:4044
0x9f67b7 expand_gimple_basic_block
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/cfgexpand.cc:6096
0x9f8357 execute
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/cfgexpand.cc:6822
2. W/ -O0, it yields the following instead:
% x86_64-unknown-linux-gnu-gcc-13.0.0 -O0 -c miuyjavi.c
during RTL pass: expand
miuyjavi.c: In function 'vec_init_dup_v8bf':
miuyjavi.c:6:10: internal compiler error: in expand_vec_perm_broadcast_1, at
config/i386/i386-expand.cc:21870
6 | return __extension__ (v8bf) { a1, a1, a1, a1, a1, a1, a1, a1 };
| ^~~~~~~~~~~~~
0x7d0713 expand_vec_perm_broadcast_1
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/config/i386/i386-expand.cc:21870
0x136dd01 ix86_expand_vector_init_duplicate(bool, machine_mode, rtx_def*,
rtx_def*)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/config/i386/i386-expand.cc:15055
0x1371b6b ix86_expand_vector_init(bool, rtx_def*, rtx_def*)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/config/i386/i386-expand.cc:16090
0x1a3c5ad ???
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/config/i386/sse.md:26600
0xb347a8 rtx_insn* insn_gen_fn::operator()<rtx_def*, rtx_def*>(rtx_def*,
rtx_def*) const
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/recog.h:407
0xb347a8 store_constructor(tree_node*, rtx_def*, int, poly_int<1u, long>, bool)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/expr.cc:7407
0xb3760d expand_constructor
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/expr.cc:8745
0xb23daa expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/expr.cc:10990
0xb30bdd store_expr(tree_node*, rtx_def*, int, bool, bool)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/expr.cc:6155
0xb32433 expand_assignment(tree_node*, tree_node*, bool)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/expr.cc:5876
0x9efdac expand_gimple_stmt_1
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/cfgexpand.cc:3946
0x9efdac expand_gimple_stmt
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/cfgexpand.cc:4044
0x9f67b7 expand_gimple_basic_block
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/cfgexpand.cc:6096
0x9f8357 execute
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220821/work/gcc-13-20220821/gcc/cfgexpand.cc:6822
Note the command line lacks -mavx512fp16 in both cases.
