[PATCH] D30416: [BitfieldShrinking] Shrink Bitfields load/store when the bitfields are legal to access independently

[Wei Mi via Phabricator via llvm-commits]

wmi updated this revision to Diff 97170.
wmi added a comment.
Herald added a subscriber: nhaehnle.

Address Eli, Matt and Chandler's comments.

Some major changes:

- A lot of comments changed.
- split reduceLoadOpsStoreWidth into two and several other helper functions.
- refactor RecursivelyDeleteTriviallyDeadInstructions.


Repository:
  rL LLVM

https://reviews.llvm.org/D30416

Files:
  include/llvm/Analysis/MemorySSAUpdater.h
  include/llvm/CodeGen/Passes.h
  include/llvm/IR/PatternMatch.h
  include/llvm/InitializePasses.h
  include/llvm/LinkAllPasses.h
  include/llvm/Target/TargetLowering.h
  include/llvm/Transforms/Utils/Local.h
  lib/Analysis/MemorySSAUpdater.cpp
  lib/CodeGen/CMakeLists.txt
  lib/CodeGen/CodeGen.cpp
  lib/CodeGen/MemAccessShrinking.cpp
  lib/CodeGen/TargetPassConfig.cpp
  lib/Target/AMDGPU/AMDGPUISelLowering.cpp
  lib/Target/AMDGPU/AMDGPUISelLowering.h
  lib/Transforms/Utils/Local.cpp
  test/CodeGen/ARM/illegal-bitfield-loadstore.ll
  test/CodeGen/ARM/load-shrink.ll
  test/CodeGen/ARM/store-shrink.ll
  test/CodeGen/X86/2008-09-11-CoalescerBug2.ll
  test/CodeGen/X86/constant-combines.ll
  test/CodeGen/X86/i16lshr8pat.ll
  test/CodeGen/X86/illegal-bitfield-loadstore.ll
  test/CodeGen/X86/load-shrink.ll
  test/CodeGen/X86/load-slice.ll
  test/CodeGen/X86/lsr-loop-exit-cond.ll
  test/CodeGen/X86/mem-access-shrink.ll
  test/CodeGen/X86/store-shrink.ll
  tools/opt/opt.cpp

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