llvm-project/flang/lib/Frontend
Andrzej Warzynski e5cdb6c56e [flang][driver] Add support for `-c` and `-emit-obj`
This patch adds a frontend action for emitting object files. While Flang
does not support code-generation, this action remains a placeholder.
This patch simply provides glue-code to connect the compiler driver
with the appropriate frontend action.

The new action is triggered with the `-c` compiler driver flag, i.e.
`flang-new -c`. This is then translated to `flang-new -fc1 -emit-obj`,
so `-emit-obj` has to be marked as supported as well.

As code-generation is not available yet, `flang-new -c` results in a
driver error:
```
error: code-generation is not available yet
```
Hopefully this will help communicating the level of available
functionality within Flang.

The definition of `emit-obj` is updated so that it can be shared between
Clang and Flang. As the original definition was enclosed within a
Clang-specific TableGen `let` statement, it is extracted into a new `let`
statement. That felt like the cleanest option.

I also commented out `-triple` in Flang::ConstructJob and updated some
comments there. This is similar to https://reviews.llvm.org/D93027. I
wanted to make sure that it's clear that we can't support `-triple`
until we have code-generation. However, once code-generation is
available we _will need_ `-triple`.

As this patch adds `-emit-obj`, the emit-obj.f90 becomes irrelevant and
is deleted. Instead, phases.f90 is added to demonstrate that users can
control compilation phases (indeed, `-c` is a phase control flag).

Reviewed By: SouraVX, clementval

Differential Revision: https://reviews.llvm.org/D93301
2021-01-07 10:52:38 +00:00
..
CMakeLists.txt [flang][driver] Add support for `-fsyntax-only` 2020-12-18 09:35:02 +00:00
CompilerInstance.cpp [flang][driver] Add support for `-D`, `-U` 2021-01-06 16:17:13 +00:00
CompilerInvocation.cpp [flang][driver] Add support for `-c` and `-emit-obj` 2021-01-07 10:52:38 +00:00
FrontendAction.cpp [flang][driver] Update error messages (nfc) 2021-01-06 10:41:27 +00:00
FrontendActions.cpp [flang][driver] Add support for `-c` and `-emit-obj` 2021-01-07 10:52:38 +00:00
FrontendOptions.cpp [Flang][Driver] Add infrastructure for basic frontend actions and file I/O 2020-10-24 14:58:32 +01:00
TextDiagnostic.cpp [flang] Introduce DiagnosticConsumer classes in libflangFrontend 2020-10-05 17:46:44 +01:00
TextDiagnosticBuffer.cpp [flang] Introduce DiagnosticConsumer classes in libflangFrontend 2020-10-05 17:46:44 +01:00
TextDiagnosticPrinter.cpp [flang] Introduce DiagnosticConsumer classes in libflangFrontend 2020-10-05 17:46:44 +01:00