[llvm-bugs] [Bug 34625] -mtune when targeting AArch64 can incorrectly affect the architecture version code is generated for

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Oct 24 02:58:29 PDT 2017


Peter Smith <peter.smith at linaro.org> changed:

           What    |Removed                     |Added
                 CC|                            |peter.smith at linaro.org
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Peter Smith <peter.smith at linaro.org> ---
An somewhat blunt fix that sets -mcpu-model to generic when -mtune=<cpu> is
used without -mcpu, has been made in https://reviews.llvm.org/D39179 

This prevents the code-generation problem, but also loses all the
micro-architectural benefits that -mtune used to provide from the use of
-mcpu-model. Further work will be needed to make -mtune only set
micro-architectural features.

Committed in r316424

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