Failed to build the project on a Raspberry Pi 3b+ running Debian 11 aarch64

[kyonmiriam]

When the attached is compiled as follows, it generates an ICE:
during GIMPLE pass: pcom
isp_flasher.c: In function 'main':
isp_flasher.c:125:5: internal compiler error: tree check: expected ssa_name, have integer_cst in ptr_deref_may_alias_decl_p, at tree-ssa-alias.c:241
125 | int main()
| ^~~~
0x7f9f82e217 __libc_start_main ../csu/libc-start.c:308
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
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make[1]: *** [Makefile:110: build/isp_flasher.o] Error 1
make[1]: Leaving directory '/home/pi/TangNano-9K-example/picotiny/fw/fw-brom'
make: *** [Makefile:24: brom] Error 2

And here is the information of the gcc:
$ riscv-none-embed-gcc -v
Using built-in specs.
COLLECT_GCC=riscv-none-embed-gcc
COLLECT_LTO_WRAPPER=/home/pi/.local/xPacks/@xpack-dev-tools/riscv-none-embed-gcc/10.2.0-1.2.1/bin/../libexec/gcc/riscv-none-embed/10.2.0/lto-wrapper
Target: riscv-none-embed
Configured with: /Host/home/ilg/Work/riscv-none-embed-gcc-10.2.0-1.2/linux-arm64/sources/riscv-gcc-10.2.0-1.1/configure --prefix=/Host/home/ilg/Work/riscv-none-embed-gcc-10.2.0-1.2/linux-arm64/install/riscv-none-embed-gcc --infodir=/Host/home/ilg/Work/riscv-none-embed-gcc-10.2.0-1.2/linux-arm64/install/riscv-none-embed-gcc/share/doc/info --mandir=/Host/home/ilg/Work/riscv-none-embed-gcc-10.2.0-1.2/linux-arm64/install/riscv-none-embed-gcc/share/doc/man --htmldir=/Host/home/ilg/Work/riscv-none-embed-gcc-10.2.0-1.2/linux-arm64/install/riscv-none-embed-gcc/share/doc/html --pdfdir=/Host/home/ilg/Work/riscv-none-embed-gcc-10.2.0-1.2/linux-arm64/install/riscv-none-embed-gcc/share/doc/pdf --build=aarch64-unknown-linux-gnu --host=aarch64-unknown-linux-gnu --target=riscv-none-embed --with-pkgversion='xPack GNU RISC-V Embedded GCC aarch64' --with-bugurl=https://github.com/sifive/freedom-tools/issues/ --enable-languages=c,c++ --disable-mingw-wildcard --enable-plugins --enable-lto --enable-checking=yes --disable-tls --disable-decimal-float --disable-libffi --disable-libgomp --disable-libmudflap --disable-libquadmath --disable-libssp --disable-libstdcxx-pch --disable-nls --disable-threads --with-gnu-as --with-gnu-ld --with-newlib --with-headers=yes --with-python-dir=share/gcc-riscv-none-embed --with-sysroot=/Host/home/ilg/Work/riscv-none-embed-gcc-10.2.0-1.2/linux-arm64/install/riscv-none-embed-gcc/riscv-none-embed --with-native-system-header-dir=/include --with-abi=ilp32 --with-arch=rv32imac --disable-build-format-warnings --with-system-zlib
Thread model: single
Supported LTO compression algorithms: zlib
gcc version 10.2.0 (xPack GNU RISC-V Embedded GCC aarch64)

The attached code compiles OK with a x86_64 linux host with the gcc has the same version number.

[nekomona]

Still unsure about how the host platform affected this problem, but the same issue could be observed in riscv64-unknown-elf gcc 10.2.0 in a x86_64 linux host.

It seems that the blind goto function pointer inside switch-case would trigger some label detection mechanism inside gcc. Replacing goto with direct calls to the function pointers in 66c9ef6 have solved this issue and should also work for rpi gcc XD