[PATCH] D121374: [flang][driver] Add support for `-mllvm`

[Andrzej Warzynski via Phabricator via cfe-commits]

awarzynski created this revision.
awarzynski added reviewers: rovka, schweitz, Leporacanthicus, kiranchandramohan, shraiysh.
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This option is added in both `flang-new` (the compiler driver) and
`flang-new -fc1` (the frontend driver). The semantics are consistent
with `clang` and `clang -cc1`.

As Flang does not run any LLVM passes when invoked with `-emit-llvm`
(i.e. `flang-new -S -emit-llvm <file>`), the tests use
`-S`/`-c`/`-emit-obj` instead. These options require an LLVM backend to
be run by the driver to generate the output (this makese `-mllvm`
relevant here).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D121374

Files:
  clang/include/clang/Driver/Options.td
  clang/lib/Driver/ToolChains/Flang.cpp
  flang/include/flang/Frontend/FrontendOptions.h
  flang/lib/Frontend/CompilerInvocation.cpp
  flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp
  flang/test/Driver/driver-help-hidden.f90
  flang/test/Driver/driver-help.f90
  flang/test/Driver/mllvm.f90

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