https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118008
Bug ID: 118008
Summary: [14/15 regression] ICE when bootstrapping with Go on
arm (gen_movdi, at config/arm/arm.md:6296)
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: sjames at gcc dot gnu.org
Target Milestone: ---
When bootstrapping with Go on arm, I see:
```
libtool: compile:
/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/build/./gcc/gccgo
-B/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/build/./gcc/
-B/usr/armv7a-unknown-linux-gnueabihf/bin/
-B/usr/armv7a-unknown-linux-gnueabihf/lib/ -isystem
/usr/armv7a-unknown-linux-gnueabihf/include -isystem
/usr/armv7a-unknown-linux-gnueabihf/sys-include -fchecking=1 -O2 -g -I . -c
-fgo-pkgpath=runtime/pprof
/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/gcc-14-20241207/libgo/go/runtime/pprof/elf.go
/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/gcc-14-20241207/libgo/go/runtime/pprof/label.go
/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/gcc-14-20241207/libgo/go/runtime/pprof/map.go
/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/gcc-14-20241207/libgo/go/runtime/pprof/pprof.go
/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/gcc-14-20241207/libgo/go/runtime/pprof/pprof_rusage.go
/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/gcc-14-20241207/libgo/go/runtime/pprof/proto.go
/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/gcc-14-20241207/libgo/go/runtime/pprof/protobuf.go
/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/gcc-14-20241207/libgo/go/runtime/pprof/protomem.go
/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/gcc-14-20241207/libgo/go/runtime/pprof/runtime.go
-o runtime/pprof.o
during RTL pass: reload
/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/gcc-14-20241207/libgo/go/runtime/pprof/protobuf.go:
In function ‘runtime/pprof.protobuf.uint64s’:
/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/gcc-14-20241207/libgo/go/runtime/pprof/protobuf.go:33:1:
internal compiler error: in gen_movdi, at config/arm/arm.md:6296
33 | func (b *protobuf) uint64s(tag int, x []uint64) {
| ^
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://bugs.gentoo.org/> for instructions.
make[4]: *** [Makefile:3053: runtime/pprof.lo] Error 1
```
11/12/13 seem fine, not tried 15 yet. It's a new setup so I don't know if it
worked any time recently in this environment. I don't yet know if gccgo was
miscompiled but I'll try figure that out next. Hints welcome.
---
```
$ /var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/build/./gcc/gccgo -v
Using built-in specs.
COLLECT_GCC=/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/build/./gcc/gccgo
Target: armv7a-unknown-linux-gnueabihf
Configured with:
/var/tmp/portage/sys-devel/gcc-14.2.1_p20241207/work/gcc-14-20241207/configure
--host=armv7a-unknown-linux-gnueabihf --build=armv7a-unknown-linux-gnueabihf
--prefix=/usr --bindir=/usr/armv7a-unknown-linux-gnueabihf/gcc-bin/14
--includedir=/usr/lib/gcc/armv7a-unknown-linux-gnueabihf/14/include
--datadir=/usr/share/gcc-data/armv7a-unknown-linux-gnueabihf/14
--mandir=/usr/share/gcc-data/armv7a-unknown-linux-gnueabihf/14/man
--infodir=/usr/share/gcc-data/armv7a-unknown-linux-gnueabihf/14/info
--with-gxx-include-dir=/usr/lib/gcc/armv7a-unknown-linux-gnueabihf/14/include/g++-v14
--disable-silent-rules --disable-dependency-tracking
--with-python-dir=/share/gcc-data/armv7a-unknown-linux-gnueabihf/14/python
--enable-objc-gc --enable-languages=c,c++,d,go,objc,obj-c++,fortran,rust
--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 14.2.1_p20241207 p6' --with-gcc-major-version-only
--enable-libstdcxx-time --enable-lto --disable-libstdcxx-pch --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
--disable-multilib --disable-fixed-point --with-float=hard --with-arch=armv7-a
--with-float=hard --with-fpu=vfpv3-d16 --enable-libgomp --disable-libssp
--disable-libada --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
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.2.1 20241207 (Gentoo 14.2.1_p20241207 p6)
```
