1 files changed, 254 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/CodeGen/ModuleBuilder.cpp b/contrib/llvm/tools/clang/lib/CodeGen/ModuleBuilder.cpp
new file mode 100644
index 0000000..def56a9
--- /dev/null
+++ b/contrib/llvm/tools/clang/lib/CodeGen/ModuleBuilder.cpp
@@ -0,0 +1,254 @@
+//===--- ModuleBuilder.cpp - Emit LLVM Code from ASTs ---------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This builds an AST and converts it to LLVM Code.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/CodeGen/ModuleBuilder.h"
+#include "CGDebugInfo.h"
+#include "CodeGenModule.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/DeclObjC.h"
+#include "clang/AST/Expr.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/TargetInfo.h"
+#include "clang/Frontend/CodeGenOptions.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include <memory>
+using namespace clang;
+
+namespace {
+  class CodeGeneratorImpl : public CodeGenerator {
+    DiagnosticsEngine &Diags;
+    std::unique_ptr<const llvm::DataLayout> TD;
+    ASTContext *Ctx;
+    const HeaderSearchOptions &HeaderSearchOpts; // Only used for debug info.
+    const PreprocessorOptions &PreprocessorOpts; // Only used for debug info.
+    const CodeGenOptions CodeGenOpts;  // Intentionally copied in.
+
+    unsigned HandlingTopLevelDecls;
+    struct HandlingTopLevelDeclRAII {
+      CodeGeneratorImpl &Self;
+      HandlingTopLevelDeclRAII(CodeGeneratorImpl &Self) : Self(Self) {
+        ++Self.HandlingTopLevelDecls;
+      }
+      ~HandlingTopLevelDeclRAII() {
+        if (--Self.HandlingTopLevelDecls == 0)
+          Self.EmitDeferredDecls();
+      }
+    };
+
+    CoverageSourceInfo *CoverageInfo;
+
+  protected:
+    std::unique_ptr<llvm::Module> M;
+    std::unique_ptr<CodeGen::CodeGenModule> Builder;
+
+  private:
+    SmallVector<CXXMethodDecl *, 8> DeferredInlineMethodDefinitions;
+
+  public:
+    CodeGeneratorImpl(DiagnosticsEngine &diags, const std::string &ModuleName,
+                      const HeaderSearchOptions &HSO,
+                      const PreprocessorOptions &PPO, const CodeGenOptions &CGO,
+                      llvm::LLVMContext &C,
+                      CoverageSourceInfo *CoverageInfo = nullptr)
+        : Diags(diags), Ctx(nullptr), HeaderSearchOpts(HSO),
+          PreprocessorOpts(PPO), CodeGenOpts(CGO), HandlingTopLevelDecls(0),
+          CoverageInfo(CoverageInfo),
+          M(new llvm::Module(ModuleName, C)) {}
+
+    ~CodeGeneratorImpl() override {
+      // There should normally not be any leftover inline method definitions.
+      assert(DeferredInlineMethodDefinitions.empty() ||
+             Diags.hasErrorOccurred());
+    }
+
+    llvm::Module* GetModule() override {
+      return M.get();
+    }
+
+    const Decl *GetDeclForMangledName(StringRef MangledName) override {
+      GlobalDecl Result;
+      if (!Builder->lookupRepresentativeDecl(MangledName, Result))
+        return nullptr;
+      const Decl *D = Result.getCanonicalDecl().getDecl();
+      if (auto FD = dyn_cast<FunctionDecl>(D)) {
+        if (FD->hasBody(FD))
+          return FD;
+      } else if (auto TD = dyn_cast<TagDecl>(D)) {
+        if (auto Def = TD->getDefinition())
+          return Def;
+      }
+      return D;
+    }
+
+    llvm::Module *ReleaseModule() override { return M.release(); }
+
+    void Initialize(ASTContext &Context) override {
+      Ctx = &Context;
+
+      M->setTargetTriple(Ctx->getTargetInfo().getTriple().getTriple());
+      M->setDataLayout(Ctx->getTargetInfo().getTargetDescription());
+      TD.reset(
+          new llvm::DataLayout(Ctx->getTargetInfo().getTargetDescription()));
+      Builder.reset(new CodeGen::CodeGenModule(Context,
+                                               HeaderSearchOpts,
+                                               PreprocessorOpts,
+                                               CodeGenOpts, *M, *TD,
+                                               Diags, CoverageInfo));
+
+      for (size_t i = 0, e = CodeGenOpts.DependentLibraries.size(); i < e; ++i)
+        HandleDependentLibrary(CodeGenOpts.DependentLibraries[i]);
+    }
+
+    void HandleCXXStaticMemberVarInstantiation(VarDecl *VD) override {
+      if (Diags.hasErrorOccurred())
+        return;
+
+      Builder->HandleCXXStaticMemberVarInstantiation(VD);
+    }
+
+    bool HandleTopLevelDecl(DeclGroupRef DG) override {
+      if (Diags.hasErrorOccurred())
+        return true;
+
+      HandlingTopLevelDeclRAII HandlingDecl(*this);
+
+      // Make sure to emit all elements of a Decl.
+      for (DeclGroupRef::iterator I = DG.begin(), E = DG.end(); I != E; ++I)
+        Builder->EmitTopLevelDecl(*I);
+
+      return true;
+    }
+
+    void EmitDeferredDecls() {
+      if (DeferredInlineMethodDefinitions.empty())
+        return;
+
+      // Emit any deferred inline method definitions. Note that more deferred
+      // methods may be added during this loop, since ASTConsumer callbacks
+      // can be invoked if AST inspection results in declarations being added.
+      HandlingTopLevelDeclRAII HandlingDecl(*this);
+      for (unsigned I = 0; I != DeferredInlineMethodDefinitions.size(); ++I)
+        Builder->EmitTopLevelDecl(DeferredInlineMethodDefinitions[I]);
+      DeferredInlineMethodDefinitions.clear();
+    }
+
+    void HandleInlineMethodDefinition(CXXMethodDecl *D) override {
+      if (Diags.hasErrorOccurred())
+        return;
+
+      assert(D->doesThisDeclarationHaveABody());
+
+      // We may want to emit this definition. However, that decision might be
+      // based on computing the linkage, and we have to defer that in case we
+      // are inside of something that will change the method's final linkage,
+      // e.g.
+      //   typedef struct {
+      //     void bar();
+      //     void foo() { bar(); }
+      //   } A;
+      DeferredInlineMethodDefinitions.push_back(D);
+
+      // Provide some coverage mapping even for methods that aren't emitted.
+      // Don't do this for templated classes though, as they may not be
+      // instantiable.
+      if (!D->getParent()->getDescribedClassTemplate())
+        Builder->AddDeferredUnusedCoverageMapping(D);
+    }
+
+    /// HandleTagDeclDefinition - This callback is invoked each time a TagDecl
+    /// to (e.g. struct, union, enum, class) is completed. This allows the
+    /// client hack on the type, which can occur at any point in the file
+    /// (because these can be defined in declspecs).
+    void HandleTagDeclDefinition(TagDecl *D) override {
+      if (Diags.hasErrorOccurred())
+        return;
+
+      Builder->UpdateCompletedType(D);
+
+      // For MSVC compatibility, treat declarations of static data members with
+      // inline initializers as definitions.
+      if (Ctx->getLangOpts().MSVCCompat) {
+        for (Decl *Member : D->decls()) {
+          if (VarDecl *VD = dyn_cast<VarDecl>(Member)) {
+            if (Ctx->isMSStaticDataMemberInlineDefinition(VD) &&
+                Ctx->DeclMustBeEmitted(VD)) {
+              Builder->EmitGlobal(VD);
+            }
+          }
+        }
+      }
+    }
+
+    void HandleTagDeclRequiredDefinition(const TagDecl *D) override {
+      if (Diags.hasErrorOccurred())
+        return;
+
+      if (CodeGen::CGDebugInfo *DI = Builder->getModuleDebugInfo())
+        if (const RecordDecl *RD = dyn_cast<RecordDecl>(D))
+          DI->completeRequiredType(RD);
+    }
+
+    void HandleTranslationUnit(ASTContext &Ctx) override {
+      if (Diags.hasErrorOccurred()) {
+        if (Builder)
+          Builder->clear();
+        M.reset();
+        return;
+      }
+
+      if (Builder)
+        Builder->Release();
+    }
+
+    void CompleteTentativeDefinition(VarDecl *D) override {
+      if (Diags.hasErrorOccurred())
+        return;
+
+      Builder->EmitTentativeDefinition(D);
+    }
+
+    void HandleVTable(CXXRecordDecl *RD) override {
+      if (Diags.hasErrorOccurred())
+        return;
+
+      Builder->EmitVTable(RD);
+    }
+
+    void HandleLinkerOptionPragma(llvm::StringRef Opts) override {
+      Builder->AppendLinkerOptions(Opts);
+    }
+
+    void HandleDetectMismatch(llvm::StringRef Name,
+                              llvm::StringRef Value) override {
+      Builder->AddDetectMismatch(Name, Value);
+    }
+
+    void HandleDependentLibrary(llvm::StringRef Lib) override {
+      Builder->AddDependentLib(Lib);
+    }
+  };
+}
+
+void CodeGenerator::anchor() { }
+
+CodeGenerator *clang::CreateLLVMCodeGen(
+    DiagnosticsEngine &Diags, const std::string &ModuleName,
+    const HeaderSearchOptions &HeaderSearchOpts,
+    const PreprocessorOptions &PreprocessorOpts, const CodeGenOptions &CGO,
+    llvm::LLVMContext &C, CoverageSourceInfo *CoverageInfo) {
+  return new CodeGeneratorImpl(Diags, ModuleName, HeaderSearchOpts,
+                               PreprocessorOpts, CGO, C, CoverageInfo);
+}