[llvm-commits] [patch][arm] Implement support for the Q, R and H modifiers

[Rafael Ávila de Espíndola]

>> This assumes the operand is the low register of the pair, i.e. even. Is that guaranteed?
>
> No.
>
> We don't allocate even/odd pairs for 64-bit values. We don't even allocate consecutive registers.
>
> Without that constraint, I can't imagine a use for the 'H' modifier?

True. I only tested with function arguments, so I missed this. Thanks 
for catching it.

The attached patch handles only the R and Q constraints. Is it OK?

> /jakob
>

Cheers,
Rafael
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