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3 Commits

Author SHA1 Message Date
Matt Arsenault 4859dd4170 AMDGPU: Handle rewriting ptrmask for more address spaces 
If this mask only clears bits in the low 32-bit half of a flat
pointer, these bits are always preserved in the result address
space. If the high bits are modified, they may need to be preserved
for some kind of user pointer tagging.
 2020-05-28 14:35:15 -04:00
Matt Arsenault d6671ee90c InferAddressSpaces: Handle ptrmask intrinsic 
This one is slightly odd since it counts as an address expression,
which previously could never fail. Allow the existing TTI hook to
return the value to use, and re-use it for handling how to handle
ptrmask.

Handles the no-op addrspacecasts for AMDGPU. We could probably do
something better based on analysis of the mask value based on the
address space, but leave that for now.
 2020-05-28 10:04:02 -04:00
Matt Arsenault 0da4353938 AMDGPU: Add baseline test for ptrmask infer address space 2020-05-28 10:04:02 -04:00