[llvm] r227584 - ARM: correct handling of .fpu directive

[Hans Wennborg]

On Fri, Jan 30, 2015 at 9:58 AM, Saleem Abdulrasool
<compnerd at compnerd.org> wrote:
> Author: compnerd
> Date: Fri Jan 30 11:58:25 2015
> New Revision: 227584
>
> URL: http://llvm.org/viewvc/llvm-project?rev=227584&view=rev
> Log:
> ARM: correct handling of .fpu directive
>
> The FPU directive permits the user to switch the target FPU, enabling
> instructions that would be otherwise unavailable.  However, when configuring the
> new subtarget features, we would not enable the implied functions for newer
> FPUs.  This would result in invalid rejection of valid input.  Ensure that we
> inherit the implied FPU functionality when enabling newer versions of the FPU.
> Fortunately, these are mostly hierarchical, unlike the CPUs.
>
> Addresses PR22395.

Should we merge this to 3.6?