[Interpreter] Pass target features to JIT

[Hahnfeld]

Summary

This is required to support RISC-V where the '+d' target feature
indicates the presence of the D instruction set extension, which
changes to the Hard-float 'd' ABI.

[v.g.vassilev]

Looks good to me but can we add a test? Do we have builders with that target?

[Hahnfeld]

In D128853#3620342, @v.g.vassilev wrote:

Looks good to me but can we add a test? Do we have builders with that target?

In principle, this is visible in *every* usage of clang-repl, including the existing tests such as clang/test/Interpreter/execute.cpp. However, there's more needed to make RISC-V work so it won't pass right now even if it was run.

[v.g.vassilev]

Thanks for the clarification! LGTM.

[Hahnfeld]

clang/lib/Interpreter/IncrementalExecutor.h

34

That's wrong, should be class TargetInfo. I'll fix this before landing if my other tests go well...

clang/lib/Interpreter/IncrementalExecutor.h

 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_CLANG_LIB_INTERPRETER_INCREMENTALEXECUTOR_H
 #define LLVM_CLANG_LIB_INTERPRETER_INCREMENTALEXECUTOR_H
 
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/Triple.h"
 #include "llvm/ExecutionEngine/Orc/ExecutionUtils.h"
 
 #include <memory>
 
 namespace llvm {
 class Error;
 class Module;
 namespace orc {
 class LLJIT;
 class ThreadSafeContext;
 } // namespace orc
 } // namespace llvm
 
 namespace clang {
 
 struct PartialTranslationUnit;
+struct TargetInfo;
 
 class IncrementalExecutor {
   using CtorDtorIterator = llvm::orc::CtorDtorIterator;
   std::unique_ptr<llvm::orc::LLJIT> Jit;
   llvm::orc::ThreadSafeContext &TSCtx;
 
   llvm::DenseMap<const PartialTranslationUnit *, llvm::orc::ResourceTrackerSP>
       ResourceTrackers;
 
 public:
   enum SymbolNameKind { IRName, LinkerName };
 
   IncrementalExecutor(llvm::orc::ThreadSafeContext &TSC, llvm::Error &Err,
-                      const llvm::Triple &Triple);
+                      const clang::TargetInfo &TI);
   ~IncrementalExecutor();
 
   llvm::Error addModule(PartialTranslationUnit &PTU);
   llvm::Error removeModule(PartialTranslationUnit &PTU);
   llvm::Error runCtors() const;
   llvm::Expected<llvm::JITTargetAddress>
   getSymbolAddress(llvm::StringRef Name, SymbolNameKind NameKind) const;
   llvm::orc::LLJIT *getExecutionEngine() const { return Jit.get(); }
 };
 
 } // end namespace clang
 
 #endif // LLVM_CLANG_LIB_INTERPRETER_INCREMENTALEXECUTOR_H

clang/lib/Interpreter/IncrementalExecutor.cpp

 //===--- IncrementalExecutor.cpp - Incremental Execution --------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the class which performs incremental code execution.
 //
 //===----------------------------------------------------------------------===//
 
 #include "IncrementalExecutor.h"
 
+#include "clang/Basic/TargetInfo.h"
+#include "clang/Basic/TargetOptions.h"
 #include "clang/Interpreter/PartialTranslationUnit.h"
 #include "llvm/ExecutionEngine/ExecutionEngine.h"
 #include "llvm/ExecutionEngine/Orc/CompileUtils.h"
 #include "llvm/ExecutionEngine/Orc/ExecutionUtils.h"
 #include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
 #include "llvm/ExecutionEngine/Orc/LLJIT.h"
 #include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
 #include "llvm/ExecutionEngine/SectionMemoryManager.h"
 #include "llvm/IR/Module.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/TargetSelect.h"
 
 namespace clang {
 
 IncrementalExecutor::IncrementalExecutor(llvm::orc::ThreadSafeContext &TSC,
                                          llvm::Error &Err,
-                                         const llvm::Triple &Triple)
+                                         const clang::TargetInfo &TI)
     : TSCtx(TSC) {
   using namespace llvm::orc;
   llvm::ErrorAsOutParameter EAO(&Err);
 
-  auto JTMB = JITTargetMachineBuilder(Triple);
+  auto JTMB = JITTargetMachineBuilder(TI.getTriple());
+  JTMB.addFeatures(TI.getTargetOpts().Features);
   if (auto JitOrErr = LLJITBuilder().setJITTargetMachineBuilder(JTMB).create())
     Jit = std::move(*JitOrErr);
   else {
     Err = JitOrErr.takeError();
     return;
   }
 
   const char Pref = Jit->getDataLayout().getGlobalPrefix();

clang/lib/Interpreter/Interpreter.cpp

 llvm::Expected<PartialTranslationUnit &>
 Interpreter::Parse(llvm::StringRef Code) {
   return IncrParser->Parse(Code);
 }
 
 llvm::Error Interpreter::Execute(PartialTranslationUnit &T) {
   assert(T.TheModule);
   if (!IncrExecutor) {
-    const llvm::Triple &Triple =
-        getCompilerInstance()->getASTContext().getTargetInfo().getTriple();
+    const clang::TargetInfo &TI =
+        getCompilerInstance()->getASTContext().getTargetInfo();
     llvm::Error Err = llvm::Error::success();
-    IncrExecutor = std::make_unique<IncrementalExecutor>(*TSCtx, Err, Triple);
+    IncrExecutor = std::make_unique<IncrementalExecutor>(*TSCtx, Err, TI);
 
     if (Err)
       return Err;
   }
   // FIXME: Add a callback to retain the llvm::Module once the JIT is done.
   if (auto Err = IncrExecutor->addModule(T))
     return Err;