Tom Stellard 09c2bd6bd4 AMDGPU/SI: Use new SimplifyDemandedBits helper for multi-use operations ...

Summary:
We are using this helper for our 24-bit arithmetic combines, so we are now able to eliminate multi-use operations that mask the high-bits of 24-bit inputs (e.g. and x, 0xffffff)

Reviewers: arsenm, nhaehnle

Subscribers: tony-tye, arsenm, kzhuravl, wdng, nhaehnle, llvm-commits, yaxunl

Differential Revision: https://reviews.llvm.org/D24672

llvm-svn: 284267

2016-10-14 19:14:29 +00:00

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