https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118146
Bug ID: 118146
Summary: [14/15 Regression] ICE: in riscv_legitimize_move, at
config/riscv/riscv.cc:3641 when reinterpreting short
vector as _Float16
Product: gcc
Version: 15.0
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: riscv64-unknown-linux-gnu
Created attachment 59931
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59931&action=edit
reduced testcase
Compiler output:
$ riscv64-unknown-linux-gnu-gcc -O -march=rv64gcv -mabi=lp64d testcase.c
during RTL pass: expand
testcase.c: In function 'foo':
testcase.c:7:5: internal compiler error: in riscv_legitimize_move, at
config/riscv/riscv.cc:3641
7 | f -= *(_Float16 *)&v;
| ~~^~~~~~~~~~~~~~~~~~
0x35e3fa1 internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:517
0x10b5189 fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostic.cc:1722
0xc2a8ad riscv_legitimize_move(machine_mode, rtx_def*, rtx_def*)
/repo/gcc-trunk/gcc/config/riscv/riscv.cc:3641
0x29c3360 gen_movhf(rtx_def*, rtx_def*)
/repo/gcc-trunk/gcc/config/riscv/riscv.md:2033
0x13e6220 rtx_insn* insn_gen_fn::operator()<rtx_def*, rtx_def*>(rtx_def*,
rtx_def*) const
/repo/gcc-trunk/gcc/recog.h:472
0x13e6220 emit_move_ccmode
/repo/gcc-trunk/gcc/expr.cc:4454
0x13e6220 emit_move_insn_1(rtx_def*, rtx_def*)
/repo/gcc-trunk/gcc/expr.cc:4599
0x13e66a9 emit_move_insn(rtx_def*, rtx_def*)
/repo/gcc-trunk/gcc/expr.cc:4750
0x127cdcd emit_library_call_value_1(int, rtx_def*, rtx_def*, libcall_type,
machine_mode, int, std::pair<rtx_def*, machine_mode>*)
/repo/gcc-trunk/gcc/calls.cc:4704
0x13e79d5 emit_library_call_value(rtx_def*, rtx_def*, libcall_type,
machine_mode, rtx_def*, machine_mode)
/repo/gcc-trunk/gcc/rtl.h:4425
0x13e79d5 convert_mode_scalar
/repo/gcc-trunk/gcc/expr.cc:563
0x13e8fa8 convert_modes(machine_mode, machine_mode, rtx_def*, int)
/repo/gcc-trunk/gcc/expr.cc:965
0x13df532 convert_to_mode(machine_mode, rtx_def*, int)
/repo/gcc-trunk/gcc/expr.cc:870
0x13df532 expand_expr_real_2(separate_ops const*, rtx_def*, machine_mode,
expand_modifier)
/repo/gcc-trunk/gcc/expr.cc:9883
0x13e5dc3 expand_expr_real_gassign(gassign*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/repo/gcc-trunk/gcc/expr.cc:11185
0x13e4bf8 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/repo/gcc-trunk/gcc/expr.cc:11367
0x13ef58c expand_expr(tree_node*, rtx_def*, machine_mode, expand_modifier)
/repo/gcc-trunk/gcc/expr.h:323
0x13ef58c expand_operands(tree_node*, tree_node*, rtx_def*, rtx_def**,
rtx_def**, expand_modifier)
/repo/gcc-trunk/gcc/expr.cc:9099
0x13db7ca expand_expr_real_2(separate_ops const*, rtx_def*, machine_mode,
expand_modifier)
/repo/gcc-trunk/gcc/expr.cc:11109
0x13e5dc3 expand_expr_real_gassign(gassign*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/repo/gcc-trunk/gcc/expr.cc:11185
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.
$ riscv64-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-riscv64/bin/riscv64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-20241218221935-r15-6361-g87f97ffba93a2d-checking-yes-rtl-df-extra-riscv64/bin/../libexec/gcc/riscv64-unknown-linux-gnu/15.0.0/lto-wrapper
Target: riscv64-unknown-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --with-isa-spec=2.2
--with-sysroot=/usr/riscv64-unknown-linux-gnu --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=riscv64-unknown-linux-gnu
--with-ld=/usr/bin/riscv64-unknown-linux-gnu-ld
--with-as=/usr/bin/riscv64-unknown-linux-gnu-as --disable-multilib
--enable-libsanitizer --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20241218221935-r15-6361-g87f97ffba93a2d-checking-yes-rtl-df-extra-riscv64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.0 20241219 (experimental) (GCC)
