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    SubjectRe: [PATCH v4 1/2] powerpc/uaccess: Implement unsafe_put_user() using 'asm goto'
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    Nick Desaulniers <ndesaulniers@google.com> writes:

    > On Thu, Jun 11, 2020 at 4:53 PM Segher Boessenkool
    > <segher@kernel.crashing.org> wrote:
    >>
    >> On Thu, Jun 11, 2020 at 03:43:55PM -0700, Nick Desaulniers wrote:
    >> > Segher, Cristophe, I suspect Clang is missing support for the %L and %U
    >> > output templates [1].
    ...
    >
    > IIUC the bug report correctly, it looks like LLVM is failing for the
    > __put_user_asm2_goto case for -m32. A simple reproducer:
    > https://godbolt.org/z/jBBF9b

    If you add `-mregnames` you get register names:

    https://godbolt.org/z/MxLjhF

    foo:
    stw %r3, 0(%r5)
    stw %r4, 4(%r5)
    blr


    cheers

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