[PATCH] D137663: [opt] Remove support for using -O[0|1|2|3|s|z] with legacy PM in opt

[Bjorn Pettersson via Phabricator via llvm-commits]

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When running a default pipeline (for a specific O-level) in opt it is
now expected that the new PM should be used. Only reason to use the
legacy PM is when testing a pass that is locked to the legacy PM (or
when testing single passes, for example used by the llc backend).

If a test should run both a default pipeline plus some other passes,
the solution would be to invoke opt twice (separating the default
pipeline execution from the execution of individual passes).

Starting with this patch "opt -O0" etc. will result in an error.

As a side effect, as the last use was removed, the
TargetMaching::adjustPassManager function has been removed.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D137663

Files:
  llvm/include/llvm/Target/TargetMachine.h
  llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
  llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.h
  llvm/lib/Target/BPF/BPFTargetMachine.cpp
  llvm/lib/Target/BPF/BPFTargetMachine.h
  llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp
  llvm/lib/Target/Hexagon/HexagonTargetMachine.h
  llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp
  llvm/lib/Target/NVPTX/NVPTXTargetMachine.h
  llvm/tools/opt/opt.cpp

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