[all-commits] [llvm/llvm-project] e1a127: [flang] Initial lowering for empty program

[Valentin Clement (バレンタイン クレメン) via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e1a12767ee628e179efc8733449f98018a686b4d
      https://github.com/llvm/llvm-project/commit/e1a12767ee628e179efc8733449f98018a686b4d
  Author: Valentin Clement <clementval at gmail.com>
  Date:   2022-01-28 (Fri, 28 Jan 2022)

  Changed paths:
    M flang/include/flang/Lower/AbstractConverter.h
    M flang/include/flang/Lower/Bridge.h
    A flang/include/flang/Lower/CallInterface.h
    M flang/include/flang/Lower/PFTBuilder.h
    A flang/include/flang/Lower/Support/Verifier.h
    A flang/include/flang/Lower/SymbolMap.h
    M flang/include/flang/Optimizer/Dialect/FIROpsSupport.h
    M flang/include/flang/Optimizer/Support/Utils.h
    A flang/lib/Lower/Bridge.cpp
    M flang/lib/Lower/CMakeLists.txt
    A flang/lib/Lower/CallInterface.cpp
    M flang/lib/Lower/CharacterExpr.cpp
    M flang/lib/Lower/Coarray.cpp
    M flang/lib/Lower/OpenACC.cpp
    A flang/lib/Lower/SymbolMap.cpp
    R flang/lib/Lower/SymbolMap.h
    M flang/test/CMakeLists.txt
    A flang/test/Lower/basic-program.f90
    M flang/tools/CMakeLists.txt
    A flang/tools/bbc/CMakeLists.txt
    A flang/tools/bbc/bbc.cpp

  Log Message:
  -----------
  [flang] Initial lowering for empty program

This patch enable lowering from Fortran to FIR for a basic empty
program. It brings all the infrastructure needed for that. As discussed
previously, this is the first patch for lowering and follow up patches
should be smaller.

With this patch we can lower the following code:

```
program basic
end program
```

To a the FIR equivalent:

```
func @_QQmain() {
  return
}
```

Follow up patch will add lowering of more complex constructs.

Reviewed By: kiranchandramohan, schweitz, PeteSteinfeld

Differential Revision: https://reviews.llvm.org/D118436