[PATCH] [X86] Allow atomic operations using immediates to avoid using a register

[Robin Morisset]

ping, still waiting on someone with knowledge of the X86 backend.


On Thu, Aug 7, 2014 at 4:12 PM, Robin Morisset <morisset at google.com> wrote:

>   Add back the modification to X86CodeEmitter as the Jit resurrected
>
> + an extra comment on the implicitness of the lock prefix before xchg.
>
> http://reviews.llvm.org/D4796
>
> Files:
>   lib/Target/X86/X86CodeEmitter.cpp
>   lib/Target/X86/X86InstrCompiler.td
>   lib/Target/X86/X86MCInstLower.cpp
>   test/CodeGen/X86/atomic_mi.ll
>
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