https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119884
Bug ID: 119884
Summary: [16 Regression] ICE: in emit_move_insn, at
expr.cc:4636 with -O2 -fno-dse
-favoid-store-forwarding
Product: gcc
Version: 16.0
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 61167
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61167&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O2 -fno-dse -favoid-store-forwarding testcase.c
during RTL pass: avoid_store_forwarding
testcase.c: In function 'foo':
testcase.c:10:1: internal compiler error: in emit_move_insn, at expr.cc:4636
10 | }
| ^
0x2de5921 internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:517
0xeefa69 fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostic.cc:1749
0x7bc056 emit_move_insn(rtx_def*, rtx_def*)
/repo/gcc-trunk/gcc/expr.cc:4636
0x167c0f8 process_store_forwarding
/repo/gcc-trunk/gcc/avoid-store-forwarding.cc:249
0x167c0f8 avoid_store_forwarding
/repo/gcc-trunk/gcc/avoid-store-forwarding.cc:588
0x167cbae execute
/repo/gcc-trunk/gcc/avoid-store-forwarding.cc:637
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-20250421155914-r16-47-ga619a128c992b2-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-20250421155914-r16-47-ga619a128c992b2-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 16.0.0 20250421 (experimental) (GCC)
