[PATCH] D114174: [WIP][RFC][CodeGen] Add support for complex multiplication

[Nicholas Guy via Phabricator via llvm-commits]

NickGuy created this revision.
NickGuy added reviewers: dmgreen, SjoerdMeijer, samtebbs.
NickGuy added a project: LLVM.
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Add ComplexArithmeticPass.cpp, implementing a potential approach for supporting
complex numbers in a target-independent manner, deferring to the TargetTransformInfo
for the given target to create a target-specific intrinsic.

This approach performs a naive check to find a complex case (<8 x float> which exceeds the width of a
standard vector register), before dropping down to a more granular check for simpler cases. This
granular method evaluates the instructions within a BasicBlock, identifying potential candidates and
tries to pair them up for each side of the complex multiply.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D114174

Files:
  llvm/include/llvm/Analysis/TargetTransformInfo.h
  llvm/include/llvm/Analysis/TargetTransformInfoImpl.h
  llvm/include/llvm/CodeGen/ComplexArithmeticPass.h
  llvm/include/llvm/CodeGen/Passes.h
  llvm/include/llvm/InitializePasses.h
  llvm/lib/Analysis/TargetTransformInfo.cpp
  llvm/lib/CodeGen/CMakeLists.txt
  llvm/lib/CodeGen/ComplexArithmeticPass.cpp
  llvm/lib/Passes/PassBuilder.cpp
  llvm/lib/Passes/PassRegistry.def
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.h
  llvm/lib/Target/AArch64/AArch64TargetMachine.cpp
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h
  llvm/lib/Target/ARM/ARMTargetMachine.cpp
  llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
  llvm/lib/Target/ARM/ARMTargetTransformInfo.h
  llvm/test/CodeGen/AArch64/O3-pipeline.ll
  llvm/test/CodeGen/ARM/complex-arithmetic-arm.ll

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