[PATCH] D81670: [TTI] Expose isNoopAddrSpaceCast from TLI.[SROA] Teach SROA to recognize no-op addrspacecast.

[Michael Liao via Phabricator via cfe-commits]

hliao created this revision.
hliao added reviewers: arsenm, chandlerc.
Herald added subscribers: llvm-commits, cfe-commits, kerbowa, dexonsmith, steven_wu, hiraditya, nhaehnle, wdng, jvesely.
Herald added projects: clang, LLVM.

So far, SROA could only handle convertible pointer pairs if they are in the
same address space. Just like no-op cast, a no-op `addrspacecast` also changes
no bits, it could also be used to convert pointer pairs from different address
spaces. That benefits `infer-address-spaces` pass to propagate address spaces.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D81670

Files:
  clang/test/CodeGen/thinlto-distributed-newpm.ll
  clang/test/CodeGenCUDA/amdgpu-kernel-arg-pointer-type.cu
  llvm/include/llvm/Analysis/TargetTransformInfo.h
  llvm/include/llvm/Analysis/TargetTransformInfoImpl.h
  llvm/include/llvm/CodeGen/BasicTTIImpl.h
  llvm/include/llvm/Transforms/Scalar/SROA.h
  llvm/lib/Analysis/TargetTransformInfo.cpp
  llvm/lib/Transforms/Scalar/SROA.cpp
  llvm/test/Other/new-pm-thinlto-prelink-pgo-defaults.ll
  llvm/test/Transforms/SROA/noop-addrspacecast.ll

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