[PATCH] D123211: [flang][driver] Add support for generating LLVM bytecode files

[Andrzej Warzynski via Phabricator via cfe-commits]

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Support for generating LLVM BC files is added in Flang's compiler and
frontend drivers. This requires the `BitcodeWriterPass` pass to be run
on the input LLVM IR module and is implemented as a dedicated frontend
aciton. The new functionality as seen by the user (compiler driver):

  flang-new -c -emit-llvm file.90

or (frontend driver):

  flang-new -fc1 -emit-llvm-bc file.f90

The new behaviour is consistent with `clang` and `clang -cc1`.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D123211

Files:
  clang/include/clang/Driver/Options.td
  flang/include/flang/Frontend/FrontendActions.h
  flang/include/flang/Frontend/FrontendOptions.h
  flang/lib/Frontend/CMakeLists.txt
  flang/lib/Frontend/CompilerInvocation.cpp
  flang/lib/Frontend/FrontendActions.cpp
  flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp
  flang/test/CMakeLists.txt
  flang/test/Driver/driver-help.f90

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