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09220c80d3
Summary: Previously, CGP would unconditionally sink addrspacecast instructions, even going so far as to sink them into a loop. Now we check that the cast is "cheap", as defined by TLI. We introduce a new "is-cheap" function to TLI rather than using isNopAddrSpaceCast because some GPU platforms want the ability to ask for non-nop casts to be sunk. Reviewers: arsenm, tra Subscribers: jholewinski, wdng, llvm-commits Differential Revision: https://reviews.llvm.org/D26923 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@287591 91177308-0d34-0410-b5e6-96231b3b80d8