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79c83c7303
Previously, we had hacks in place to eagerly emit everything in the global ExternalDefinitions list. These can now be removed, at least at the IRGen layer.
88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
//===--- GenClangDecl.cpp - Swift IRGen for imported Clang declarations ---===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "IRGenModule.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/DeclGroup.h"
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#include "clang/AST/GlobalDecl.h"
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#include "clang/AST/RecursiveASTVisitor.h"
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#include "clang/CodeGen/ModuleBuilder.h"
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#include "llvm/ADT/SmallPtrSet.h"
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using namespace swift;
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using namespace irgen;
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namespace {
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class ClangDeclRefFinder
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: public clang::RecursiveASTVisitor<ClangDeclRefFinder> {
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std::function<void(const clang::DeclRefExpr *)> callback;
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public:
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template <typename Fn>
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explicit ClangDeclRefFinder(Fn fn) : callback(fn) {}
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bool VisitDeclRefExpr(clang::DeclRefExpr *DRE) {
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callback(DRE);
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return true;
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}
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};
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} // end anonymous namespace
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void IRGenModule::emitClangDecl(const clang::Decl *decl) {
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auto valueDecl = dyn_cast<clang::ValueDecl>(decl);
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if (!valueDecl || valueDecl->isExternallyVisible()) {
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ClangCodeGen->HandleTopLevelDecl(
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clang::DeclGroupRef(const_cast<clang::Decl*>(decl)));
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return;
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}
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if (!GlobalClangDecls.insert(decl->getCanonicalDecl()).second)
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return;
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SmallVector<const clang::Decl *, 8> stack;
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stack.push_back(decl);
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ClangDeclRefFinder refFinder([&](const clang::DeclRefExpr *DRE) {
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const clang::ValueDecl *D = DRE->getDecl();
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if (!D->hasLinkage() || D->isExternallyVisible())
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return;
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if (!GlobalClangDecls.insert(D->getCanonicalDecl()).second)
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return;
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stack.push_back(D);
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});
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while (!stack.empty()) {
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auto *next = const_cast<clang::Decl *>(stack.pop_back_val());
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if (auto fn = dyn_cast<clang::FunctionDecl>(next)) {
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const clang::FunctionDecl *definition;
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if (fn->hasBody(definition)) {
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refFinder.TraverseDecl(const_cast<clang::FunctionDecl *>(definition));
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next = const_cast<clang::FunctionDecl *>(definition);
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}
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}
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ClangCodeGen->HandleTopLevelDecl(clang::DeclGroupRef(next));
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}
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}
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llvm::Constant *
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IRGenModule::getAddrOfClangGlobalDecl(clang::GlobalDecl global,
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ForDefinition_t forDefinition) {
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// Register the decl with the clang code generator.
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if (auto decl = global.getDecl())
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emitClangDecl(decl);
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return ClangCodeGen->GetAddrOfGlobal(global, (bool) forDefinition);
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}
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void IRGenModule::finalizeClangCodeGen() {
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ClangCodeGen->HandleTranslationUnit(
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*const_cast<clang::ASTContext *>(ClangASTContext));
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}
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