[flang] Accept compiler directives between module subprograms

[klausler]

Parse and represent compiler directives in a modules module-subprogram-part between the module subprograms.

[llvmbot]

@llvm/pr-subscribers-flang-parser

Author: Peter Klausler (klausler)

Changes

Parse and represent compiler directives in a modules module-subprogram-part between the module subprograms.

---

Full diff: https://github.com/llvm/llvm-project/pull/91230.diff

2 Files Affected:

• (modified) flang/include/flang/Parser/parse-tree.h (+2-1)
• (modified) flang/lib/Parser/program-parsers.cpp (+2-1)

diff --git a/flang/include/flang/Parser/parse-tree.h b/flang/include/flang/Parser/parse-tree.h
index 4641f9d20d5b95..c0635445837904 100644
--- a/flang/include/flang/Parser/parse-tree.h
+++ b/flang/include/flang/Parser/parse-tree.h
@@ -2905,7 +2905,8 @@ struct ModuleSubprogram {
   UNION_CLASS_BOILERPLATE(ModuleSubprogram);
   std::variant<common::Indirection<FunctionSubprogram>,
       common::Indirection<SubroutineSubprogram>,
-      common::Indirection<SeparateModuleSubprogram>>
+      common::Indirection<SeparateModuleSubprogram>,
+      common::Indirection<CompilerDirective>>
       u;
 };
 
diff --git a/flang/lib/Parser/program-parsers.cpp b/flang/lib/Parser/program-parsers.cpp
index e24559bf14f7c9..ff5e58ebc721c5 100644
--- a/flang/lib/Parser/program-parsers.cpp
+++ b/flang/lib/Parser/program-parsers.cpp
@@ -247,7 +247,8 @@ TYPE_CONTEXT_PARSER("module subprogram part"_en_US,
 //         separate-module-subprogram
 TYPE_PARSER(construct<ModuleSubprogram>(indirect(functionSubprogram)) ||
     construct<ModuleSubprogram>(indirect(subroutineSubprogram)) ||
-    construct<ModuleSubprogram>(indirect(Parser<SeparateModuleSubprogram>{})))
+    construct<ModuleSubprogram>(indirect(Parser<SeparateModuleSubprogram>{})) ||
+    construct<ModuleSubprogram>(indirect(compilerDirective)))
 
 // R1410 module-nature -> INTRINSIC | NON_INTRINSIC
 constexpr auto moduleNature{

[clementval]

LGTM