[PATCH] D153099: [SPIR-V] Begin removing explicit setRegClass calls

[Aleksandr Bezzubikov via Phabricator via llvm-commits]

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As a part of a general cleanup of SPIRV's instruction selection
we want to remove explicit setRegClass calls which happen in some
SPIRV-specific pre-selection lowering passes. As these calls only
concern finally emitted SPIRV instructions and not MIR ones we can
easily constrain them.

This change removes the calls everywhere except for the builtins-
related code, that will require more effort to refactor the overall
bultins emission code.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D153099

Files:
  llvm/lib/Target/SPIRV/SPIRVCallLowering.cpp
  llvm/lib/Target/SPIRV/SPIRVGlobalRegistry.cpp
  llvm/lib/Target/SPIRV/SPIRVPreLegalizer.cpp

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