[Bug middle-end/58670] asm goto miscompilation

[ndesaulniers at google dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670

Nick Desaulniers <ndesaulniers at google dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |ndesaulniers at google dot com

--- Comment #10 from Nick Desaulniers <ndesaulniers at google dot com> ---
Specifically, it seems this was fixed in the gcc-4.8.2 timeframe.  This shows
no issue in gcc-4.8.2, but the issue from comment #5 in gcc-4.8.1.  It seems
the Linux kernel works around this with a macro called `asm_volatile_goto` that
simply inserts an empty asm block `asm("");` after an `asm goto`, which even in
this reproducer fixes the problem.

https://godbolt.org/z/ZUDRnU