================
@@ -2538,6 +2538,11 @@ void CIRGenModule::emitTopLevelDecl(Decl *decl) {
emitDeclContext(cast<ExportDecl>(decl));
break;
+ case Decl::Import:
+ // Nothing to emit for C++20 module imports. Initializers run through
----------------
berkaysahiin wrote:
```cpp
case Decl::Import: {
auto *Import = cast<ImportDecl>(D);
// If we've already imported this module, we're done.
if (!ImportedModules.insert(Import->getImportedModule()))
break;
// Emit debug information for direct imports.
if (!Import->getImportedOwningModule()) {
if (CGDebugInfo *DI = getModuleDebugInfo())
DI->EmitImportDecl(*Import);
}
// For C++ standard modules we are done - we will call the module
// initializer for imported modules, and that will likewise call those for
// any imports it has.
if (CXX20ModuleInits && Import->getImportedModule() &&
Import->getImportedModule()->isNamedModule())
break;
```
For C++20 modules, we break out early. The missing part is debug info
generation which is a missing feature in CIR
(`MissingFeatures::generateDebugInfo`).
The first check is for dedup which is not necessary here since its noop.
We might need to come back here once CIR supports generating debug info. Wdyt ?
https://github.com/llvm/llvm-project/pull/221720
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