[PATCH][MC/X86_64] Implement Win64 exception handling

[Kai Nacke]

Hi Nico!

On 10.01.2014 12:42, Nico Rieck wrote:
> Hello Kai!
>
> +  case X86::LEA64r:
> ...
> +    if (SReg == RI->getStackRegister()) {
> +      assert(Offset < 0 && "Offset must be negativ");
>
> While fixing PR16779 I noticed that I had this backwards. Offsets here
> actually must be *positive*! Sorry for the confusion. So LEA cannot be
> used instead of a SUB, and I'll disallow it for atom on Win64.

I rechecked what MSVC emits. Indeed the offset is positive. I change this.

Nice to hear that you are working on PR16779!

Regards,
Kai

>
> -Nico
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