================
@@ -241,28 +244,180 @@ IncrementalCompilerBuilder::CreateCudaHost() {
return IncrementalCompilerBuilder::createCuda(false);
}
-Interpreter::Interpreter(std::unique_ptr<CompilerInstance> CI,
+class InProcessPrintingASTConsumer final : public MultiplexConsumer {
+ Interpreter &Interp;
+
+public:
+ InProcessPrintingASTConsumer(std::unique_ptr<ASTConsumer> C, Interpreter &I)
+ : MultiplexConsumer(std::move(C)), Interp(I) {}
+ bool HandleTopLevelDecl(DeclGroupRef DGR) override final {
+ if (DGR.isNull())
+ return true;
+
+ for (Decl *D : DGR)
+ if (auto *TLSD = llvm::dyn_cast<TopLevelStmtDecl>(D))
+ if (TLSD && TLSD->isSemiMissing()) {
+ auto ExprOrErr =
+ Interp.ExtractValueFromExpr(cast<Expr>(TLSD->getStmt()));
+ if (llvm::Error E = ExprOrErr.takeError()) {
+ llvm::logAllUnhandledErrors(std::move(E), llvm::errs(),
+ "Value printing failed: ");
+ return false; // abort parsing
+ }
+ TLSD->setStmt(*ExprOrErr);
+ }
+
+ return MultiplexConsumer::HandleTopLevelDecl(DGR);
+ }
+};
+
+/// A custom action enabling the incremental processing functionality.
+///
+/// The usual \p FrontendAction expects one call to ExecuteAction and once it
+/// sees a call to \p EndSourceFile it deletes some of the important objects
+/// such as \p Preprocessor and \p Sema assuming no further input will come.
+///
+/// \p IncrementalAction ensures it keep its underlying action's objects alive
+/// as long as the \p IncrementalParser needs them.
+///
+class IncrementalAction : public WrapperFrontendAction {
+private:
+ bool IsTerminating = false;
+ Interpreter &Interp;
+ std::unique_ptr<ASTConsumer> Consumer;
+
+public:
+ IncrementalAction(CompilerInstance &CI, llvm::LLVMContext &LLVMCtx,
+ llvm::Error &Err, Interpreter &I,
+ std::unique_ptr<ASTConsumer> Consumer = nullptr)
+ : WrapperFrontendAction([&]() {
+ llvm::ErrorAsOutParameter EAO(&Err);
+ std::unique_ptr<FrontendAction> Act;
+ switch (CI.getFrontendOpts().ProgramAction) {
+ default:
+ Err = llvm::createStringError(
+ std::errc::state_not_recoverable,
+ "Driver initialization failed. "
+ "Incremental mode for action %d is not supported",
+ CI.getFrontendOpts().ProgramAction);
+ return Act;
+ case frontend::ASTDump:
+ [[fallthrough]];
+ case frontend::ASTPrint:
+ [[fallthrough]];
+ case frontend::ParseSyntaxOnly:
+ Act = CreateFrontendAction(CI);
+ break;
+ case frontend::PluginAction:
+ [[fallthrough]];
+ case frontend::EmitAssembly:
+ [[fallthrough]];
+ case frontend::EmitBC:
+ [[fallthrough]];
+ case frontend::EmitObj:
+ [[fallthrough]];
+ case frontend::PrintPreprocessedInput:
+ [[fallthrough]];
----------------
AaronBallman wrote:
```suggestion
case frontend::PluginAction:
case frontend::EmitAssembly:
case frontend::EmitBC:
case frontend::EmitObj:
case frontend::PrintPreprocessedInput:
```
You only need the `fallthrough` attribute when the cases are not immediately
adjacent to one another (basically, one of the cases has to do something,
otherwise fallthrough is very much expected).
https://github.com/llvm/llvm-project/pull/107737
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