[clang-repl] Set up executor implicitly to account for init PTUs

Author: weliveindetail

clang/lib/Interpreter/Interpreter.cpp

@@ -229,12 +229,30 @@ IncrementalCompilerBuilder::CreateCudaHost() {
 }
 
 Interpreter::Interpreter(std::unique_ptr<CompilerInstance> CI,
-                         llvm::Error &Err) {
-  llvm::ErrorAsOutParameter EAO(&Err);
+                         llvm::Error &ErrOut) {
+  llvm::ErrorAsOutParameter EAO(&ErrOut);
   auto LLVMCtx = std::make_unique<llvm::LLVMContext>();
   TSCtx = std::make_unique<llvm::orc::ThreadSafeContext>(std::move(LLVMCtx));
-  IncrParser = std::make_unique<IncrementalParser>(*this, std::move(CI),
-                                                   *TSCtx->getContext(), Err);
+  IncrParser = std::make_unique<IncrementalParser>(
+      *this, std::move(CI), *TSCtx->getContext(), ErrOut);
+  if (ErrOut)
+    return;
+
+  // Not all frontends support code-generation, e.g. ast-dump actions don't
+  if (IncrParser->getCodeGen()) {
+    if (llvm::Error Err = CreateExecutor()) {
+      ErrOut = joinErrors(std::move(ErrOut), std::move(Err));
+      return;
+    }
+
+    // Process the PTUs that came from initialization. For example -include will
+    // give us a header that's processed at initialization of the preprocessor.
+    for (PartialTranslationUnit &PTU : IncrParser->getPTUs())
+      if (llvm::Error Err = Execute(PTU)) {
+        ErrOut = joinErrors(std::move(ErrOut), std::move(Err));
+        return;
+      }
+  }
 }
 
 Interpreter::~Interpreter() {
@@ -395,10 +413,16 @@ llvm::Error Interpreter::CreateExecutor() {
     return llvm::make_error<llvm::StringError>("Operation failed. "
                                                "Execution engine exists",
                                                std::error_code());
+  if (!IncrParser->getCodeGen())
+    return llvm::make_error<llvm::StringError>("Operation failed. "
+                                               "No code generator available",
+                                               std::error_code());
+
   llvm::Expected<std::unique_ptr<llvm::orc::LLJITBuilder>> JB =
       CreateJITBuilder(*getCompilerInstance());
   if (!JB)
     return JB.takeError();
+
   llvm::Error Err = llvm::Error::success();
   auto Executor = std::make_unique<IncrementalExecutor>(*TSCtx, **JB, Err);
   if (!Err)

clang/test/Interpreter/execute.cpp

@@ -7,6 +7,8 @@
 
 // RUN: cat %s | clang-repl | FileCheck %s
 // RUN: cat %s | clang-repl -Xcc -O2 | FileCheck %s
+// RUN: clang-repl -Xcc -include -Xcc %s | FileCheck %s
+// RUN: clang-repl -Xcc -fsyntax-only -Xcc -include -Xcc %s
 extern "C" int printf(const char *, ...);
 int i = 42;
 auto r1 = printf("i = %d\n", i);
@@ -19,5 +21,3 @@ auto r2 = printf("S[f=%f, m=0x%llx]\n", s.f, reinterpret_cast<unsigned long long
 
 inline int foo() { return 42; }
 int r3 = foo();
-
-%quit