https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125469
Bug ID: 125469
Summary: ICE: in final_scan_insn_1, at final.cc:2823 could not
split insn {*adddi_1_nf} with -Ofast -mapx-features=nf
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 64558
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=64558&action=edit
reduced testcase
x86_64-pc-linux-gnu-gcc -Ofast -mapx-features=nf testcase.c
testcase.c: In function 'foo':
testcase.c:7:1: error: could not split insn
7 | }
| ^
(insn:TI 12 36 13 2 (set (reg:DI 2 cx [108])
(plus:DI (reg:DI 0 ax [orig:104 s ] [104])
(reg:DI 5 di [ _2+8 ]))) "testcase.c":6:5 288 {*adddi_1_nf}
(expr_list:REG_DEAD (reg:DI 5 di [ _2+8 ])
(nil)))
during RTL pass: final
testcase.c:7:1: internal compiler error: in final_scan_insn_1, at final.cc:2823
0x2d164bd internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:787
0xe399b5 fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostics/context.cc:1813
0x89984c _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/repo/gcc-trunk/gcc/rtl-error.cc:108
0x7ee14a final_scan_insn_1
/repo/gcc-trunk/gcc/final.cc:2823
0x118ce6b final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
/repo/gcc-trunk/gcc/final.cc:2902
0x118d0b2 final_1
/repo/gcc-trunk/gcc/final.cc:1984
0x118dd31 rest_of_handle_final
/repo/gcc-trunk/gcc/final.cc:4272
0x118dd31 execute
/repo/gcc-trunk/gcc/final.cc:4350
/repo/gcc-trunk/binary-trunk-20260527153149-r17-840-geae54dd6e4cc69-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/17.0.0/cc1
-quiet -iprefix
/repo/gcc-trunk/binary-trunk-20260527153149-r17-840-geae54dd6e4cc69-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
-mapx-features=nf -mtune=generic -march=x86-64 -Ofast -o /tmp/ccjeI2fd.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-20260527153149-r17-840-geae54dd6e4cc69-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-20260527153149-r17-840-geae54dd6e4cc69-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 17.0.0 20260527 (experimental) (GCC)
