[all-commits] [llvm/llvm-project] bdbe8f: [flang] Align `-x` language modes with `gfortran` ...

[Iñaki Amatria Barral via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bdbe8fa1f3dcde77f7e0741ea7fa757ce092a420
      https://github.com/llvm/llvm-project/commit/bdbe8fa1f3dcde77f7e0741ea7fa757ce092a420
  Author: Iñaki Amatria Barral <140811900+inaki-amatria at users.noreply.github.com>
  Date:   2025-03-12 (Wed, 12 Mar 2025)

  Changed paths:
    M clang/lib/Driver/ToolChains/Flang.cpp
    M flang/lib/Frontend/CompilerInvocation.cpp
    A flang/test/Driver/dash-x-f95-cpp-input.f
    A flang/test/Driver/dash-x-f95-do-not-assume-fixed-form.f90
    M flang/test/Driver/input-from-stdin/input-from-stdin.f90

  Log Message:
  -----------
  [flang] Align `-x` language modes with `gfortran` (#130268)

This PR addresses some of the issues described in
https://github.com/llvm/llvm-project/issues/127617. Key changes:

- Stop assuming fixed-form for `-x f95` unless the input is a `.i` file.
This change ensures compatibility with `-save-temps` workflows while
preventing unintended fixed-form assumptions.
- Ensure `-x f95-cpp-input` enables `-cpp` by default, aligning Flang's
behavior with `gfortran`.



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