[PATCH] MachineVerifier: Handle the optional def operand in a PATCHPOINT instruction.

[Duncan P. N. Exon Smith via llvm-commits]

> On 2015-Aug-07, at 17:15, Alex L <arphaman at gmail.com> wrote:
> 
> Hi,
> 
> The PATCHPOINT instructions have a single optional defined register operand,
> but the machine verifier can't verify the optional defined register operands.

Seems reasonable to me, but I guess I'm not sure.  Maybe someone familiar with
patchpoint (Philip? Juergen?) could have a look at this one.

> So, this patch makes sure that the machine verifier won't report an error when a PATCHPOINT
> instruction doesn't have its optional defined register operand.
> 
> This change will allow us to enable the machine verifier for the code generation tests for the
> patchpoint intrinsics.
> 
> Cheers,
> Alex
> <0001-MachineVerifier-Handle-the-optional-def-operand-in-P.patch>