https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125173
Bug ID: 125173
Summary: ICE: in combine_and_move_insns, at ira.cc:3992 with
-O1 -fno-fuse-ops-with-volatile-access
-fno-forward-propagate --param=max-cse-insns=0
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
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 64364
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=64364&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O1 -fno-fuse-ops-with-volatile-access
-fno-forward-propagate --param=max-cse-insns=0 testcase.c
during RTL pass: ira
testcase.c: In function 'foo':
testcase.c:14:1: internal compiler error: in combine_and_move_insns, at
ira.cc:3992
14 | }
| ^
0x2cd91ed internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:787
0xe3497b fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostics/context.cc:1813
0x83b550 combine_and_move_insns
/repo/gcc-trunk/gcc/ira.cc:3992
0x13ba305 ira
/repo/gcc-trunk/gcc/ira.cc:5838
0x13ba305 execute
/repo/gcc-trunk/gcc/ira.cc:6220
/repo/gcc-trunk/binary-trunk-20260503080400-r17-284-g85a9b3b56de7c1-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-20260503080400-r17-284-g85a9b3b56de7c1-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=generic -march=x86-64 -O1 -fno-fuse-ops-with-volatile-access
-fno-forward-propagate --param=max-cse-insns=0 -o /tmp/ccGu5chz.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-20260503080400-r17-284-g85a9b3b56de7c1-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-20260503080400-r17-284-g85a9b3b56de7c1-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 17.0.0 20260503 (experimental) (GCC)
