[flang][driver] Add `-fdebug-dump-all`

The new option will run the semantic checks and then dump the parse tree
and all the symbols. This is equivalent to running the driver twice,
once with `-fdebug-dump-parse-tree` and then with
the `-fdebug-dump-symbols` action flag.

Currently we wouldn't be able to achieve the same by simply running:
```
flang-new -fc1 -fdebug-dump-parse-tree -fdebug-dump-symbols <input-file>
```
That's because the new driver will only run one frontend action per
invocation (both of the flags used here are action flags). Diverging
from this design would lead to costly compromises and it's best avoided.

We may want to consider re-designing our debugging actions (and action
options) in the future so that there's more code re-use. For now, I'm
focusing on making sure that we support all the major cases requested by
our users.

Differential Revision: https://reviews.llvm.org/D104305

1 files changed, 3 insertions, 0 deletions

diff --git a/flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp b/flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp
index ffc0d75..e53f652 100644
--- a/flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp
+++ b/flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp
@@ -55,6 +55,9 @@ static std::unique_ptr<FrontendAction> CreateFrontendBaseAction(
   case DebugDumpParseTreeNoSema:
     return std::make_unique<DebugDumpParseTreeNoSemaAction>();
     break;
+  case DebugDumpAll:
+    return std::make_unique<DebugDumpAllAction>();
+    break;
   case DebugDumpProvenance:
     return std::make_unique<DebugDumpProvenanceAction>();
     break;