[PATCH] AAPCS-VFP: Do not use any more VFP registers after allocating a CPRC to the stack

[Renato Golin]

Hi Oliver,

The patch looks good to me, though I'm not sure about the
CallingConvEmitter part.  It also looks correct, but I'll let other people
review that more thoroughly (Molloy?).

cheers,
--renato




On 6 February 2014 17:33, Oliver Stannard <oliver.stannard at arm.com> wrote:

> Hi,
>
>
>
> According the the AAPCS, if an argument is a CPRC (co-processor register
> candidate) but cannot be allocated to a co-processor register, the argument
> must be allocated on the stack and all co-processor registers of that class
> must be marked as unavailable (AAPCS, rule C.2.cp). However, llvm does not
> currently mark the VFP registers as unavailable, so can allocate a later
> CPRC to a register after an earlier one has been allocated to the stack.
>
>
>
> The attached patch corrects this.
>
>
>
> Oliver
>
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