[all-commits] [llvm/llvm-project] e1da32: [flang][driver] Add support for the "-init-only" o...

[Andrzej Warzyński via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e1da3297d253b33be1ff941cf9ed9091dd332ea5
      https://github.com/llvm/llvm-project/commit/e1da3297d253b33be1ff941cf9ed9091dd332ea5
  Author: Stuart Ellis <stuart.ellis at arm.com>
  Date:   2021-06-07 (Mon, 07 Jun 2021)

  Changed paths:
    M clang/include/clang/Driver/Options.td
    M flang/include/flang/Frontend/FrontendActions.h
    M flang/include/flang/Frontend/FrontendOptions.h
    M flang/lib/Frontend/CompilerInvocation.cpp
    M flang/lib/Frontend/FrontendActions.cpp
    M flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp
    M flang/test/Driver/driver-help.f90
    A flang/test/Driver/init-only.f90

  Log Message:
  -----------
  [flang][driver] Add support for the "-init-only" option

Adding the `-init-only` option and corresponding frontend action to
generate a diagnostic.

`-init-only` vs `-test-io`:
`-init-only` ignores the input (it never calls the prescanner)
`-test-io` is similar to `-init-only`, but does read and print the input
without calling the prescanner.

This patch also adds a Driver test to check this action.

Reviewed By: awarzynski, AMDChirag

Differential Revision: https://reviews.llvm.org/D102849