https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118776
Bug ID: 118776
Summary: [15 regression] ICE when building xvid-1.3.7 with LTO
(extract_insn, at recog.cc:2882)
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code, lto
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: sjames at gcc dot gnu.org
Target Milestone: ---
```
# x86_64-pc-linux-gnu-gcc -m32 -mfpmath=sse -fuse-ld=bfd -Wl,-O1
-Wl,--as-needed @list -o /dev/null -shared -Wl,--version-script=libxvidcore.ld
-std=gnu17 -fPIC -flto=jobserver -O2 -march=tigerlake
lto-wrapper: warning: jobserver is not available: ‘MAKEFLAGS’ environment
variable is unset
lto-wrapper: note: see the ‘-flto’ option documentation for more information
../../../src/decoder.c: In function ‘decoder_decode’:
../../../src/decoder.c:1789:1: error: unrecognizable insn:
1789 | }
| ^
(insn 2041 2040 2042 314 (set (reg:V32QI 597 [ _1171 ])
(vec_merge:V32QI (umax:V32QI (mem/c:V32QI (plus:SI (reg/f:SI 93
virtual-stack-vars)
(const_int -64 [0xffffffffffffffc0])) [0 MEM
<vector(32) unsigned char> [(const uint8_t *)_2207 + 32B]+0 S32 A256])
(reg:V32QI 1585))
(reg:V32QI 1586)
(reg:SI 1584))) -1
(nil))
during RTL pass: vregs
../../../src/decoder.c:1789:1: internal compiler error: in extract_insn, at
recog.cc:2882
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://bugs.gentoo.org/> for instructions.
make: *** [/tmp/ccTiA1ax.mk:2: /tmp/ccSLExF5.ltrans0.ltrans.o] Error 1
lto-wrapper: fatal error: make returned 2 exit status
compilation terminated.
/usr/lib/gcc/x86_64-pc-linux-gnu/15/../../../../x86_64-pc-linux-gnu/bin/ld.bfd:
error: lto-wrapper failed
```
---
```
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/15/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-pc-linux-gnu
Configured with:
/var/tmp/portage.notmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/15
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/15/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/15/include/g++-v15
--disable-silent-rules --disable-dependency-tracking
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/15/python
--enable-objc-gc --enable-languages=c,c++,d,go,objc,obj-c++,fortran,ada
--enable-obsolete --enable-secureplt --disable-werror --with-system-zlib
--enable-nls --without-included-gettext --disable-libunwind-exceptions
--enable-checking=yes,extra,rtl --with-bugurl=https://bugs.gentoo.org/
--with-pkgversion='Gentoo Hardened 15.0.9999 p, commit
601d2479a8464e3bf1fb53065109a027db7c93f1' --with-gcc-major-version-only
--enable-libstdcxx-time --enable-lto --disable-libstdcxx-pch --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
--enable-multilib --with-multilib-list=m32,m64 --disable-fixed-point
--enable-targets=all --enable-offload-defaulted
--enable-offload-targets=nvptx-none --enable-libgomp --disable-libssp
--enable-libada --enable-cet --disable-systemtap --disable-valgrind-annotations
--disable-vtable-verify --disable-libvtv --with-zstd --with-isl
--disable-isl-version-check --enable-default-pie --enable-host-pie
--enable-host-bind-now --enable-default-ssp --disable-fixincludes
--with-build-config=bootstrap-cet
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.1 20250204 (experimental)
64c66f5bce60fcc4a943bcac1865db2a72aaa1bd (Gentoo Hardened 15.0.9999 p, commit
601d2479a8464e3bf1fb53065109a027db7c93f1)
```
