[PATCH] Don't create illegal memset with address space >= 256 in memcpyopt.

[Matt Arsenault]

On 01/26/2015 08:11 AM, Saleem Abdulrasool wrote:
> This seems target dependent.  Im not sure why, but, for example, SystemZ does permit it (or at the very least, continues to form the call.  Perhaps move this behind a target specific check?
This should be behind a target specific check, but there are already a 
few places that have basically this hardcoded check for x86 address 
space numbers already that should start using it.