[PATCH] D50723: [SimplifyCFG] Delay phi-to-select until the end of module simplification

[John Brawn via Phabricator via llvm-commits]

john.brawn created this revision.
Herald added subscribers: llvm-commits, dexonsmith, steven_wu, eraman, mehdi_amini.
Herald added a reviewer: javed.absar.

Converting a phi to select can prevent some function simplification optimizations from happening (e.g. both GVN and GVNHoist can understand phis but not selects) so it's worthwhile to delay doing this conversion until after these optimisations have happened.


Repository:
  rL LLVM

https://reviews.llvm.org/D50723

Files:
  include/llvm/Transforms/Scalar.h
  include/llvm/Transforms/Utils/Local.h
  lib/Passes/PassBuilder.cpp
  lib/Target/AArch64/AArch64TargetMachine.cpp
  lib/Target/ARM/ARMTargetMachine.cpp
  lib/Transforms/IPO/PassManagerBuilder.cpp
  lib/Transforms/Scalar/Scalar.cpp
  lib/Transforms/Scalar/SimplifyCFGPass.cpp
  lib/Transforms/Utils/SimplifyCFG.cpp
  test/Other/new-pm-defaults.ll
  test/Other/new-pm-thinlto-defaults.ll
  test/Other/opt-O2-pipeline.ll
  test/Other/opt-O3-pipeline.ll
  test/Other/opt-Os-pipeline.ll
  test/Other/pass-pipelines.ll

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