https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127461
Bug ID: 127461
Summary: ICE: in final_scan_insn_1, at final.cc:2817 (could not
split insn {addv2qi3}) with -mtune=c3-2
Product: gcc
Version: 17.0
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 65623
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65623&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -Og -mtune=c3-2 -m32 testcase.c
testcase.c: In function 'main':
testcase.c:18:1: error: could not split insn
18 | }
| ^
(insn 22 38 23 4 (parallel [
(set (reg/v:V2QI 0 ax [orig:102 u ] [102])
(plus:V2QI (reg:V2QI 0 ax [orig:100 _3 ] [100])
(reg:V2QI 2 cx [orig:101 _5 ] [101])))
(clobber (reg:CC 17 flags))
]) "testcase.c":7:5 2193 {addv2qi3}
(expr_list:REG_DEAD (reg:V2QI 2 cx [orig:101 _5 ] [101])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil))))
during RTL pass: final
testcase.c:18:1: internal compiler error: in final_scan_insn_1, at
final.cc:2817
0x2c5d51d internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:787
0xcb5f09 fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostics/context.cc:1813
0x8a7234 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/repo/gcc-trunk/gcc/rtl-error.cc:108
0x7fa130 final_scan_insn_1
/repo/gcc-trunk/gcc/final.cc:2817
0x100c82b final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
/repo/gcc-trunk/gcc/final.cc:2896
0x100ca72 final_1
/repo/gcc-trunk/gcc/final.cc:1978
0x100d6f1 rest_of_handle_final
/repo/gcc-trunk/gcc/final.cc:4259
0x100d6f1 execute
/repo/gcc-trunk/gcc/final.cc:4337
/repo/gcc-trunk/binary-trunk-20260916200900-r17-4373-gd9128914a30615-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/17.0.0/cc1
-quiet -imultilib 32 -iprefix
/repo/gcc-trunk/binary-trunk-20260916200900-r17-4373-gd9128914a30615-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../lib/gcc/x86_64-pc-linux-gnu/17.0.0/
testcase.c -quiet -dumpdir a- -dumpbase testcase.c -dumpbase-ext .c -mtune=c3-2
-m32 -march=x86-64 -Og -o /tmp/ccLcLhpN.s
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-20260916200900-r17-4373-gd9128914a30615-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/17.0.0/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-20260916200900-r17-4373-gd9128914a30615-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 17.0.0 20260916 (experimental) (GCC)
