https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121410
Bug ID: 121410
Summary: [16 Regression] ICE: in
expand_set_or_cpymem_prologue_epilogue_by_misaligned_m
oves, at config/i386/i386-expand.cc:8872 with -O2
-mavx512f -mstore-max=128
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 62052
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62052&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O2 -mavx512f -mstore-max=128 testcase.c
during RTL pass: expand
testcase.c: In function 'foo':
testcase.c:6:22: internal compiler error: in
expand_set_or_cpymem_prologue_epilogue_by_misaligned_moves, at
config/i386/i386-expand.cc:8872
6 | _BitInt(465) b = a >> 1860;
| ~~^~~~~~~
0x2b7ae21 internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:534
0xe0769b fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostics/context.cc:1640
0x954e28 expand_set_or_cpymem_prologue_epilogue_by_misaligned_moves
/repo/gcc-trunk/gcc/config/i386/i386-expand.cc:8872
0x1b40f1f ix86_expand_set_or_cpymem(rtx_def*, rtx_def*, rtx_def*, rtx_def*,
rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, bool)
/repo/gcc-trunk/gcc/config/i386/i386-expand.cc:9689
0x23959d1 gen_setmemsi(rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*,
rtx_def*, rtx_def*, rtx_def*, rtx_def*)
/repo/gcc-trunk/gcc/config/i386/i386.md:26060
0x143ddd5 rtx_insn* insn_gen_fn::operator()<rtx_def*, rtx_def*, rtx_def*,
rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*>(rtx_def*,
rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*,
rtx_def*) const
/repo/gcc-trunk/gcc/recog.h:472
0x143ddd5 maybe_gen_insn(insn_code, unsigned int, expand_operand*)
/repo/gcc-trunk/gcc/optabs.cc:8237
0x1442838 maybe_expand_insn(insn_code, unsigned int, expand_operand*)
/repo/gcc-trunk/gcc/optabs.cc:8257
0x1110d06 set_storage_via_setmem(rtx_def*, rtx_def*, rtx_def*, unsigned int,
unsigned int, long, unsigned long, unsigned long, unsigned long)
/repo/gcc-trunk/gcc/expr.cc:4043
0x112676d clear_storage_hints(rtx_def*, rtx_def*, block_op_methods, unsigned
int, long, unsigned long, unsigned long, unsigned long, unsigned int)
/repo/gcc-trunk/gcc/expr.cc:3908
0xfa7c50 expand_builtin_memset_args
/repo/gcc-trunk/gcc/builtins.cc:4768
0xfafe2c expand_builtin(tree_node*, rtx_def*, rtx_def*, machine_mode, int)
/repo/gcc-trunk/gcc/builtins.cc:8265
0x111dc8e expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/repo/gcc-trunk/gcc/expr.cc:12535
0xfded00 expand_expr(tree_node*, rtx_def*, machine_mode, expand_modifier)
/repo/gcc-trunk/gcc/expr.h:323
0xfded00 expand_call_stmt
/repo/gcc-trunk/gcc/cfgexpand.cc:3204
0xfded00 expand_gimple_stmt_1
/repo/gcc-trunk/gcc/cfgexpand.cc:4235
0xfded00 expand_gimple_stmt
/repo/gcc-trunk/gcc/cfgexpand.cc:4382
0xfe0387 expand_gimple_basic_block
/repo/gcc-trunk/gcc/cfgexpand.cc:6501
0xfe2787 execute
/repo/gcc-trunk/gcc/cfgexpand.cc:7248
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-20250805033710-r16-2774-g01a784e7c5e724-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/16.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --enable-libsanitizer
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20250805033710-r16-2774-g01a784e7c5e724-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 16.0.0 20250805 (experimental) (GCC)
