The powerpc clang-nightly version 20.0.0 build warnings / errors noticed on the Today's Linux next-20241024 tag.

powerpc: build: * clang-nightly-maple_defconfig * clang-nightly-tinyconfig * clang-nightly-tqm8xx_defconfig * clang-nightly-mpc83xx_defconfig * clang-nightly-defconfig * clang-nightly-cell_defconfig * clang-nightly-ppc64e_defconfig * clang-nightly-allnoconfig

Reported-by: Linux Kernel Functional Testing lkft@linaro.org

Build errors: ---------- fatal error: error in backend: Trying to obtain a reserved register "r2". clang: error: clang frontend command failed with exit code 70 (use -v to see invocation) Debian clang version 20.0.0 (++20241023112211+699ce16b6284-1~exp1~20241023112229.1038) Target: powerpc-unknown-linux-gnu

metadata: ---------- kernel: 6.12.0-rc4 git_repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git_sha: fd21fa4a912ebbf8a6a341c31d8456f61e7d4170 git_describe: next-20241024 Test details: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241024 config: https://storage.tuxsuite.com/public/linaro/lkft/builds/2ns7sv9TltSifV46KaGs3... download_url: https://storage.tuxsuite.com/public/linaro/lkft/builds/2ns7sv9TltSifV46KaGs3... arch: powerpc toolchain: Clang-nightly (version 20.0.0)

build log link: ------ - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241024/tes... - https://storage.tuxsuite.com/public/linaro/lkft/builds/2ns7sv9TltSifV46KaGs3...

steps to reproduce: ------ # tuxmake --runtime podman --target-arch powerpc --toolchain clang-nightly --kconfig defconfig LLVM=1 LLVM_IAS=0 LD=powerpc64le-linux-gnu-ld

-- Linaro LKFT https://lkft.linaro.org