clang/unittests/Interpreter/IncrementalProcessingTest.cpp

   1 //=== unittests/CodeGen/IncrementalProcessingTest.cpp - IncrementalCodeGen ===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "clang/AST/ASTConsumer.h"
  10 #include "clang/AST/ASTContext.h"
  11 #include "clang/AST/RecursiveASTVisitor.h"
  12 #include "clang/Basic/TargetInfo.h"
  13 #include "clang/CodeGen/ModuleBuilder.h"
  14 #include "clang/Frontend/CompilerInstance.h"
  15 #include "clang/Interpreter/Interpreter.h"
  16 #include "clang/Lex/Preprocessor.h"
  17 #include "clang/Parse/Parser.h"
  18 #include "clang/Sema/Sema.h"
  19 #include "llvm/IR/LLVMContext.h"
  20 #include "llvm/IR/Module.h"
  21 #include "llvm/Support/MemoryBuffer.h"
  22 #include "llvm/TargetParser/Host.h"
  23 #include "llvm/TargetParser/Triple.h"
  24 #include "gtest/gtest.h"
  25
  26 #include <memory>
  27
  28 using namespace llvm;
  29 using namespace clang;
  30
  31 namespace {
  32
  33 // Incremental processing produces several modules, all using the same "main
  34 // file". Make sure CodeGen can cope with that, e.g. for static initializers.
  35 const char TestProgram1[] = "extern \"C\" int funcForProg1() { return 17; }\n"
  36                             "struct EmitCXXGlobalInitFunc1 {\n"
  37                             "   EmitCXXGlobalInitFunc1() {}\n"
  38                             "} test1;";
  39
  40 const char TestProgram2[] = "extern \"C\" int funcForProg2() { return 42; }\n"
  41                             "struct EmitCXXGlobalInitFunc2 {\n"
  42                             "   EmitCXXGlobalInitFunc2() {}\n"
  43                             "} test2;";
  44
  45 const Function *getGlobalInit(llvm::Module *M) {
  46   for (const auto &Func : *M)
  47     if (Func.hasName() && Func.getName().startswith("_GLOBAL__sub_I_"))
  48       return &Func;
  49
  50   return nullptr;
  51 }
  52
  53 TEST(IncrementalProcessing, EmitCXXGlobalInitFunc) {
  54   std::vector<const char *> ClangArgv = {"-Xclang", "-emit-llvm-only"};
  55   auto CB = clang::IncrementalCompilerBuilder();
  56   CB.SetCompilerArgs(ClangArgv);
  57   auto CI = cantFail(CB.CreateCpp());
  58   auto Interp = llvm::cantFail(Interpreter::create(std::move(CI)));
  59
  60   std::array<clang::PartialTranslationUnit *, 2> PTUs;
  61
  62   PTUs[0] = &llvm::cantFail(Interp->Parse(TestProgram1));
  63   ASSERT_TRUE(PTUs[0]->TheModule);
  64   ASSERT_TRUE(PTUs[0]->TheModule->getFunction("funcForProg1"));
  65
  66   PTUs[1] = &llvm::cantFail(Interp->Parse(TestProgram2));
  67   ASSERT_TRUE(PTUs[1]->TheModule);
  68   ASSERT_TRUE(PTUs[1]->TheModule->getFunction("funcForProg2"));
  69   // First code should not end up in second module:
  70   ASSERT_FALSE(PTUs[1]->TheModule->getFunction("funcForProg1"));
  71
  72   // Make sure global inits exist and are unique:
  73   const Function *GlobalInit1 = getGlobalInit(PTUs[0]->TheModule.get());
  74   ASSERT_TRUE(GlobalInit1);
  75
  76   const Function *GlobalInit2 = getGlobalInit(PTUs[1]->TheModule.get());
  77   ASSERT_TRUE(GlobalInit2);
  78
  79   ASSERT_FALSE(GlobalInit1->getName() == GlobalInit2->getName());
  80 }
  81
  82 } // end anonymous namespace