[PATCH] D127218: [PowerPC] Disable automatic generation of STXVP

[Nemanja Ivanovic via Phabricator via llvm-commits]

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There are instances where using paired vector stores leads to significant performance degradation due to issues with store forwarding. To avoid falling into this trap with compiler-generated code, we will not emit these instructions unless the user requests them explicitly (with a builtin or by specifying the option).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D127218

Files:
  llvm/lib/Target/PowerPC/PPCISelLowering.cpp
  llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp
  llvm/lib/Target/PowerPC/PPCRegisterInfo.h
  llvm/test/CodeGen/PowerPC/mma-acc-memops.ll
  llvm/test/CodeGen/PowerPC/mma-acc-spill.ll
  llvm/test/CodeGen/PowerPC/mma-intrinsics.ll
  llvm/test/CodeGen/PowerPC/spill-vec-pair.ll

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