[PATCH] D147114: [LV] Use BFI to adjust cost of predicated instructions

[Evgeniy via Phabricator via llvm-commits]

ebrevnov created this revision.
Herald added subscribers: ormris, dmgreen, arphaman, steven_wu, hiraditya.
Herald added a project: All.
ebrevnov requested review of this revision.
Herald added subscribers: llvm-commits, pcwang-thead.
Herald added a project: LLVM.

Currently, vectorizer uses hard coded scale (1/2) to adjust cost of predicated instructions. Since actual probability of predicated instruction execution may vary from 0 to 1 predicted cost may be very far from reality. This patch brings BFI to cost calculation of predicated instructions.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D147114

Files:
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/test/Analysis/CostModel/X86/masked-interleaved-store-i16.ll
  llvm/test/Analysis/CostModel/X86/masked-scatter-i32-with-i8-index.ll
  llvm/test/Analysis/CostModel/X86/masked-scatter-i64-with-i8-index.ll
  llvm/test/Other/new-pm-defaults.ll
  llvm/test/Other/new-pm-lto-defaults.ll
  llvm/test/Other/new-pm-thinlto-postlink-defaults.ll
  llvm/test/Transforms/LoopVectorize/ARM/mve-icmpcost.ll
  llvm/test/Transforms/LoopVectorize/icmp-uniforms.ll
  llvm/test/Transforms/LoopVectorize/if-pred-non-void.ll

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