This revision was automatically updated to reflect the committed changes.
Closed by commit rGdc4889357adb: [clang-repl] Support statements on global
scope in incremental mode. (authored by v.g.vassilev).
Herald added a project: clang.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D127284/new/
https://reviews.llvm.org/D127284
Files:
clang/include/clang/AST/ASTNodeTraverser.h
clang/include/clang/AST/Decl.h
clang/include/clang/AST/RecursiveASTVisitor.h
clang/include/clang/Basic/DeclNodes.td
clang/include/clang/Basic/LangOptions.def
clang/include/clang/Driver/Options.td
clang/include/clang/Lex/Preprocessor.h
clang/include/clang/Parse/Parser.h
clang/include/clang/Sema/Sema.h
clang/include/clang/Sema/Template.h
clang/include/clang/Serialization/ASTBitCodes.h
clang/lib/AST/Decl.cpp
clang/lib/AST/DeclBase.cpp
clang/lib/AST/DeclPrinter.cpp
clang/lib/CodeGen/CGDecl.cpp
clang/lib/CodeGen/CodeGenModule.cpp
clang/lib/CodeGen/CodeGenModule.h
clang/lib/CodeGen/ModuleBuilder.cpp
clang/lib/Interpreter/IncrementalParser.cpp
clang/lib/Interpreter/Interpreter.cpp
clang/lib/Parse/ParseDecl.cpp
clang/lib/Parse/ParseTentative.cpp
clang/lib/Parse/Parser.cpp
clang/lib/Sema/SemaDecl.cpp
clang/lib/Serialization/ASTCommon.cpp
clang/lib/Serialization/ASTReaderDecl.cpp
clang/lib/Serialization/ASTWriterDecl.cpp
clang/test/Interpreter/disambiguate-decl-stmt.cpp
clang/test/Interpreter/execute-stmts.cpp
clang/test/Interpreter/stmt-serialization.cpp
clang/tools/libclang/CIndex.cpp
clang/unittests/Interpreter/InterpreterTest.cpp
Index: clang/unittests/Interpreter/InterpreterTest.cpp
===================================================================
--- clang/unittests/Interpreter/InterpreterTest.cpp
+++ clang/unittests/Interpreter/InterpreterTest.cpp
@@ -124,14 +124,8 @@
auto *PTU1 = R1->TUPart;
EXPECT_EQ(2U, DeclsSize(PTU1));
- // FIXME: Add support for wrapping and running statements.
auto R2 = Interp->Parse("var1++; printf(\"var1 value %d\\n\", var1);");
- EXPECT_FALSE(!!R2);
- using ::testing::HasSubstr;
- EXPECT_THAT(DiagnosticsOS.str(),
- HasSubstr("error: unknown type name 'var1'"));
- auto Err = R2.takeError();
- EXPECT_EQ("Parsing failed.", llvm::toString(std::move(Err)));
+ EXPECT_TRUE(!!R2);
}
TEST(InterpreterTest, UndoCommand) {
Index: clang/tools/libclang/CIndex.cpp
===================================================================
--- clang/tools/libclang/CIndex.cpp
+++ clang/tools/libclang/CIndex.cpp
@@ -6696,6 +6696,7 @@
case Decl::Export:
case Decl::ObjCPropertyImpl:
case Decl::FileScopeAsm:
+ case Decl::TopLevelStmt:
case Decl::StaticAssert:
case Decl::Block:
case Decl::Captured:
Index: clang/test/Interpreter/stmt-serialization.cpp
===================================================================
--- /dev/null
+++ clang/test/Interpreter/stmt-serialization.cpp
@@ -0,0 +1,19 @@
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -std=c++20 -fincremental-extensions -fmodules-cache-path=%t \
+// RUN: -x c++ %s -verify
+// expected-no-diagnostics
+
+#pragma clang module build TopLevelStmt
+module TopLevelStmt { module Statements {} }
+#pragma clang module contents
+
+#pragma clang module begin TopLevelStmt.Statements
+extern "C" int printf(const char*,...);
+int i = 0;
+i++;
+#pragma clang module end /*TopLevelStmt.Statements*/
+#pragma clang module endbuild /*TopLevelStmt*/
+
+#pragma clang module import TopLevelStmt.Statements
+
+printf("Value of i is '%d'", i);
Index: clang/test/Interpreter/execute-stmts.cpp
===================================================================
--- /dev/null
+++ clang/test/Interpreter/execute-stmts.cpp
@@ -0,0 +1,38 @@
+// REQUIRES: host-supports-jit
+// UNSUPPORTED: system-aix
+// RUN: cat %s | clang-repl -Xcc -Xclang -Xcc -verify | FileCheck %s
+// RUN: %clang_cc1 -verify -fincremental-extensions -emit-llvm -o - %s \
+// RUN: | FileCheck --check-prefix=CODEGEN-CHECK %s
+
+// expected-no-diagnostics
+
+//CODEGEN-CHECK-COUNT-2: define internal void @__stmts__
+//CODEGEN-CHECK-NOT: define internal void @__stmts__
+
+
+extern "C" int printf(const char*,...);
+
+template <typename T> T call() { printf("called\n"); return T(); }
+call<int>();
+// CHECK: called
+
+int i = 1;
+++i;
+printf("i = %d\n", i);
+// CHECK: i = 2
+
+namespace Ns { void f(){ i++; } }
+Ns::f();
+
+void g() { ++i; }
+g();
+::g();
+
+printf("i = %d\n", i);
+// CHECK-NEXT: i = 5
+
+for (; i > 4; --i) printf("i = %d\n", i);
+// CHECK-NEXT: i = 5
+
+int j = i; printf("j = %d\n", j);
+// CHECK-NEXT: j = 4
Index: clang/test/Interpreter/disambiguate-decl-stmt.cpp
===================================================================
--- /dev/null
+++ clang/test/Interpreter/disambiguate-decl-stmt.cpp
@@ -0,0 +1,56 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -fincremental-extensions -std=c++20 %s
+// RUN: %clang_cc1 -fsyntax-only -DMS -fms-extensions -verify -fincremental-extensions -std=c++20 %s
+
+// expected-no-diagnostics
+
+extern "C" int printf(const char*,...);
+
+// Decls which are hard to disambiguate
+
+// ParseStatementOrDeclaration returns multiple statements.
+#ifdef MS
+int g_bFlag = 1;
+__if_exists(::g_bFlag) {
+ printf("Entering __if_exists\n");
+ printf("g_bFlag = %d\n", g_bFlag);
+}
+#endif // MS
+
+// Operators.
+struct S1 { operator int(); };
+S1::operator int() { return 0; }
+
+// Dtors
+using I = int;
+I x = 10;
+x.I::~I();
+x = 20;
+
+// Ctors
+
+// Deduction guide
+template<typename T> struct A { A(); A(T); };
+A() -> A<int>;
+
+struct S2 { S2(); };
+S2::S2() = default;
+
+namespace N { struct S { S(); }; }
+N::S::S() { printf("N::S::S()\n"); }
+N::S s;
+
+namespace Ns {namespace Ns { void Ns(); void Fs();}}
+void Ns::Ns::Ns() { printf("void Ns::Ns::Ns()\n"); }
+void Ns::Ns::Fs() {}
+
+Ns::Ns::Fs();
+Ns::Ns::Ns();
+
+struct Attrs1 { Attrs1(); };
+Attrs1::Attrs1() __attribute((pure)) = default;
+
+struct Attrs2 { Attrs2(); };
+__attribute((pure)) Attrs2::Attrs2() = default;
+
+// Extra semicolon
+namespace N {};
Index: clang/lib/Serialization/ASTWriterDecl.cpp
===================================================================
--- clang/lib/Serialization/ASTWriterDecl.cpp
+++ clang/lib/Serialization/ASTWriterDecl.cpp
@@ -124,6 +124,7 @@
void VisitLinkageSpecDecl(LinkageSpecDecl *D);
void VisitExportDecl(ExportDecl *D);
void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
+ void VisitTopLevelStmtDecl(TopLevelStmtDecl *D);
void VisitImportDecl(ImportDecl *D);
void VisitAccessSpecDecl(AccessSpecDecl *D);
void VisitFriendDecl(FriendDecl *D);
@@ -1171,6 +1172,12 @@
Code = serialization::DECL_FILE_SCOPE_ASM;
}
+void ASTDeclWriter::VisitTopLevelStmtDecl(TopLevelStmtDecl *D) {
+ VisitDecl(D);
+ Record.AddStmt(D->getStmt());
+ Code = serialization::DECL_TOP_LEVEL_STMT_DECL;
+}
+
void ASTDeclWriter::VisitEmptyDecl(EmptyDecl *D) {
VisitDecl(D);
Code = serialization::DECL_EMPTY;
@@ -2418,7 +2425,7 @@
// File scoped assembly or obj-c or OMP declare target implementation must be
// seen.
- if (isa<FileScopeAsmDecl, ObjCImplDecl>(D))
+ if (isa<FileScopeAsmDecl, TopLevelStmtDecl, ObjCImplDecl>(D))
return true;
if (WritingModule && isPartOfPerModuleInitializer(D)) {
Index: clang/lib/Serialization/ASTReaderDecl.cpp
===================================================================
--- clang/lib/Serialization/ASTReaderDecl.cpp
+++ clang/lib/Serialization/ASTReaderDecl.cpp
@@ -402,6 +402,7 @@
void VisitLinkageSpecDecl(LinkageSpecDecl *D);
void VisitExportDecl(ExportDecl *D);
void VisitFileScopeAsmDecl(FileScopeAsmDecl *AD);
+ void VisitTopLevelStmtDecl(TopLevelStmtDecl *D);
void VisitImportDecl(ImportDecl *D);
void VisitAccessSpecDecl(AccessSpecDecl *D);
void VisitFriendDecl(FriendDecl *D);
@@ -1678,6 +1679,11 @@
AD->setRParenLoc(readSourceLocation());
}
+void ASTDeclReader::VisitTopLevelStmtDecl(TopLevelStmtDecl *D) {
+ VisitDecl(D);
+ D->Statement = Record.readStmt();
+}
+
void ASTDeclReader::VisitBlockDecl(BlockDecl *BD) {
VisitDecl(BD);
BD->setBody(cast_or_null<CompoundStmt>(Record.readStmt()));
@@ -3022,8 +3028,8 @@
return false;
}
- if (isa<FileScopeAsmDecl, ObjCProtocolDecl, ObjCImplDecl, ImportDecl,
- PragmaCommentDecl, PragmaDetectMismatchDecl>(D))
+ if (isa<FileScopeAsmDecl, TopLevelStmtDecl, ObjCProtocolDecl, ObjCImplDecl,
+ ImportDecl, PragmaCommentDecl, PragmaDetectMismatchDecl>(D))
return true;
if (isa<OMPThreadPrivateDecl, OMPDeclareReductionDecl, OMPDeclareMapperDecl,
OMPAllocateDecl, OMPRequiresDecl>(D))
@@ -3829,6 +3835,9 @@
case DECL_FILE_SCOPE_ASM:
D = FileScopeAsmDecl::CreateDeserialized(Context, ID);
break;
+ case DECL_TOP_LEVEL_STMT_DECL:
+ D = TopLevelStmtDecl::CreateDeserialized(Context, ID);
+ break;
case DECL_BLOCK:
D = BlockDecl::CreateDeserialized(Context, ID);
break;
Index: clang/lib/Serialization/ASTCommon.cpp
===================================================================
--- clang/lib/Serialization/ASTCommon.cpp
+++ clang/lib/Serialization/ASTCommon.cpp
@@ -412,6 +412,7 @@
case Decl::PragmaComment:
case Decl::PragmaDetectMismatch:
case Decl::FileScopeAsm:
+ case Decl::TopLevelStmt:
case Decl::AccessSpec:
case Decl::Friend:
case Decl::FriendTemplate:
Index: clang/lib/Sema/SemaDecl.cpp
===================================================================
--- clang/lib/Sema/SemaDecl.cpp
+++ clang/lib/Sema/SemaDecl.cpp
@@ -19550,6 +19550,12 @@
return New;
}
+Decl *Sema::ActOnTopLevelStmtDecl(Stmt *Statement) {
+ auto *New = TopLevelStmtDecl::Create(Context, Statement);
+ Context.getTranslationUnitDecl()->addDecl(New);
+ return New;
+}
+
void Sema::ActOnPragmaRedefineExtname(IdentifierInfo* Name,
IdentifierInfo* AliasName,
SourceLocation PragmaLoc,
Index: clang/lib/Parse/Parser.cpp
===================================================================
--- clang/lib/Parse/Parser.cpp
+++ clang/lib/Parse/Parser.cpp
@@ -707,8 +707,7 @@
// Late template parsing can begin.
Actions.SetLateTemplateParser(LateTemplateParserCallback, nullptr, this);
- if (!PP.isIncrementalProcessingEnabled())
- Actions.ActOnEndOfTranslationUnit();
+ Actions.ActOnEndOfTranslationUnit();
//else don't tell Sema that we ended parsing: more input might come.
return true;
@@ -1029,8 +1028,13 @@
ConsumeToken();
return nullptr;
}
+ if (PP.isIncrementalProcessingEnabled() &&
+ !isDeclarationStatement(/*DisambiguatingWithExpression=*/true))
+ return ParseTopLevelStmtDecl();
+
// We can't tell whether this is a function-definition or declaration yet.
- return ParseDeclarationOrFunctionDefinition(Attrs, DeclSpecAttrs, DS);
+ if (!SingleDecl)
+ return ParseDeclarationOrFunctionDefinition(Attrs, DeclSpecAttrs, DS);
}
// This routine returns a DeclGroup, if the thing we parsed only contains a
Index: clang/lib/Parse/ParseTentative.cpp
===================================================================
--- clang/lib/Parse/ParseTentative.cpp
+++ clang/lib/Parse/ParseTentative.cpp
@@ -46,7 +46,10 @@
/// 'using' 'namespace' '::'[opt] nested-name-specifier[opt]
/// namespace-name ';'
///
-bool Parser::isCXXDeclarationStatement() {
+bool Parser::isCXXDeclarationStatement(
+ bool DisambiguatingWithExpression /*=false*/) {
+ assert(getLangOpts().CPlusPlus && "Must be called for C++ only.");
+
switch (Tok.getKind()) {
// asm-definition
case tok::kw_asm:
@@ -59,6 +62,42 @@
case tok::kw_static_assert:
case tok::kw__Static_assert:
return true;
+ case tok::identifier: {
+ if (DisambiguatingWithExpression) {
+ RevertingTentativeParsingAction TPA(*this);
+ // Parse the C++ scope specifier.
+ CXXScopeSpec SS;
+ ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
+ /*ObjectHasErrors=*/false,
+ /*EnteringContext=*/true);
+
+ switch (Tok.getKind()) {
+ case tok::identifier: {
+ IdentifierInfo *II = Tok.getIdentifierInfo();
+ bool isDeductionGuide =
+ Actions.isDeductionGuideName(getCurScope(), *II, Tok.getLocation(),
+ /*Template=*/nullptr);
+ if (Actions.isCurrentClassName(*II, getCurScope(), &SS) ||
+ isDeductionGuide) {
+ if (isConstructorDeclarator(/*Unqualified=*/SS.isEmpty(),
+ isDeductionGuide,
+ DeclSpec::FriendSpecified::No))
+ return true;
+ }
+ break;
+ }
+ case tok::kw_operator:
+ return true;
+ case tok::annot_cxxscope: // Check if this is a dtor.
+ if (NextToken().is(tok::tilde))
+ return true;
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ [[fallthrough]];
// simple-declaration
default:
return isCXXSimpleDeclaration(/*AllowForRangeDecl=*/false);
Index: clang/lib/Parse/ParseDecl.cpp
===================================================================
--- clang/lib/Parse/ParseDecl.cpp
+++ clang/lib/Parse/ParseDecl.cpp
@@ -5381,6 +5381,25 @@
}
}
+Parser::DeclGroupPtrTy Parser::ParseTopLevelStmtDecl() {
+ assert(PP.isIncrementalProcessingEnabled() && "Not in incremental mode");
+
+ // Parse a top-level-stmt.
+ Parser::StmtVector Stmts;
+ ParsedStmtContext SubStmtCtx = ParsedStmtContext();
+ StmtResult R = ParseStatementOrDeclaration(Stmts, SubStmtCtx);
+ if (!R.isUsable())
+ return nullptr;
+
+ SmallVector<Decl *, 2> DeclsInGroup;
+ DeclsInGroup.push_back(Actions.ActOnTopLevelStmtDecl(R.get()));
+ // Currently happens for things like -fms-extensions and use `__if_exists`.
+ for (Stmt *S : Stmts)
+ DeclsInGroup.push_back(Actions.ActOnTopLevelStmtDecl(S));
+
+ return Actions.BuildDeclaratorGroup(DeclsInGroup);
+}
+
/// isDeclarationSpecifier() - Return true if the current token is part of a
/// declaration specifier.
///
Index: clang/lib/Interpreter/Interpreter.cpp
===================================================================
--- clang/lib/Interpreter/Interpreter.cpp
+++ clang/lib/Interpreter/Interpreter.cpp
@@ -138,13 +138,11 @@
// specified. By prepending we allow users to override the default
// action and use other actions in incremental mode.
// FIXME: Print proper driver diagnostics if the driver flags are wrong.
- ClangArgv.insert(ClangArgv.begin() + 1, "-c");
-
- if (!llvm::is_contained(ClangArgv, " -x")) {
- // We do C++ by default; append right after argv[0] if no "-x" given
- ClangArgv.push_back("-x");
- ClangArgv.push_back("c++");
- }
+ // We do C++ by default; append right after argv[0] if no "-x" given
+ ClangArgv.insert(ClangArgv.end(), "-xc++");
+ ClangArgv.insert(ClangArgv.end(), "-Xclang");
+ ClangArgv.insert(ClangArgv.end(), "-fincremental-extensions");
+ ClangArgv.insert(ClangArgv.end(), "-c");
// Put a dummy C++ file on to ensure there's at least one compile job for the
// driver to construct.
Index: clang/lib/Interpreter/IncrementalParser.cpp
===================================================================
--- clang/lib/Interpreter/IncrementalParser.cpp
+++ clang/lib/Interpreter/IncrementalParser.cpp
@@ -101,7 +101,6 @@
CompletionConsumer = &CI.getCodeCompletionConsumer();
Preprocessor &PP = CI.getPreprocessor();
- PP.enableIncrementalProcessing();
PP.EnterMainSourceFile();
if (!CI.hasSema())
@@ -174,9 +173,6 @@
Sema::ModuleImportState ImportState;
for (bool AtEOF = P->ParseFirstTopLevelDecl(ADecl, ImportState); !AtEOF;
AtEOF = P->ParseTopLevelDecl(ADecl, ImportState)) {
- // If we got a null return and something *was* parsed, ignore it. This
- // is due to a top-level semicolon, an action override, or a parse error
- // skipping something.
if (ADecl && !Consumer->HandleTopLevelDecl(ADecl.get()))
return llvm::make_error<llvm::StringError>("Parsing failed. "
"The consumer rejected a decl",
Index: clang/lib/CodeGen/ModuleBuilder.cpp
===================================================================
--- clang/lib/CodeGen/ModuleBuilder.cpp
+++ clang/lib/CodeGen/ModuleBuilder.cpp
@@ -179,6 +179,7 @@
}
bool HandleTopLevelDecl(DeclGroupRef DG) override {
+ // FIXME: Why not return false and abort parsing?
if (Diags.hasErrorOccurred())
return true;
Index: clang/lib/CodeGen/CodeGenModule.h
===================================================================
--- clang/lib/CodeGen/CodeGenModule.h
+++ clang/lib/CodeGen/CodeGenModule.h
@@ -591,6 +591,11 @@
llvm::DenseMap<const llvm::Constant *, llvm::GlobalVariable *> RTTIProxyMap;
+ // Helps squashing blocks of TopLevelStmtDecl into a single llvm::Function
+ // when used with -fincremental-extensions.
+ std::pair<std::unique_ptr<CodeGenFunction>, const TopLevelStmtDecl *>
+ GlobalTopLevelStmtBlockInFlight;
+
public:
CodeGenModule(ASTContext &C, IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS,
const HeaderSearchOptions &headersearchopts,
@@ -1590,6 +1595,7 @@
void EmitDeclContext(const DeclContext *DC);
void EmitLinkageSpec(const LinkageSpecDecl *D);
+ void EmitTopLevelStmt(const TopLevelStmtDecl *D);
/// Emit the function that initializes C++ thread_local variables.
void EmitCXXThreadLocalInitFunc();
Index: clang/lib/CodeGen/CodeGenModule.cpp
===================================================================
--- clang/lib/CodeGen/CodeGenModule.cpp
+++ clang/lib/CodeGen/CodeGenModule.cpp
@@ -516,6 +516,14 @@
applyGlobalValReplacements();
applyReplacements();
emitMultiVersionFunctions();
+
+ if (Context.getLangOpts().IncrementalExtensions &&
+ GlobalTopLevelStmtBlockInFlight.first) {
+ const TopLevelStmtDecl *TLSD = GlobalTopLevelStmtBlockInFlight.second;
+ GlobalTopLevelStmtBlockInFlight.first->FinishFunction(TLSD->getEndLoc());
+ GlobalTopLevelStmtBlockInFlight = {};
+ }
+
if (CXX20ModuleInits && Primary && Primary->isInterfaceOrPartition())
EmitCXXModuleInitFunc(Primary);
else
@@ -6150,6 +6158,39 @@
EmitDeclContext(LSD);
}
+void CodeGenModule::EmitTopLevelStmt(const TopLevelStmtDecl *D) {
+ std::unique_ptr<CodeGenFunction> &CurCGF =
+ GlobalTopLevelStmtBlockInFlight.first;
+
+ // We emitted a top-level stmt but after it there is initialization.
+ // Stop squashing the top-level stmts into a single function.
+ if (CurCGF && CXXGlobalInits.back() != CurCGF->CurFn) {
+ CurCGF->FinishFunction(D->getEndLoc());
+ CurCGF = nullptr;
+ }
+
+ if (!CurCGF) {
+ // void __stmts__N(void)
+ // FIXME: Ask the ABI name mangler to pick a name.
+ std::string Name = "__stmts__" + llvm::utostr(CXXGlobalInits.size());
+ FunctionArgList Args;
+ QualType RetTy = getContext().VoidTy;
+ const CGFunctionInfo &FnInfo =
+ getTypes().arrangeBuiltinFunctionDeclaration(RetTy, Args);
+ llvm::FunctionType *FnTy = getTypes().GetFunctionType(FnInfo);
+ llvm::Function *Fn = llvm::Function::Create(
+ FnTy, llvm::GlobalValue::InternalLinkage, Name, &getModule());
+
+ CurCGF.reset(new CodeGenFunction(*this));
+ GlobalTopLevelStmtBlockInFlight.second = D;
+ CurCGF->StartFunction(GlobalDecl(), RetTy, Fn, FnInfo, Args,
+ D->getBeginLoc(), D->getBeginLoc());
+ CXXGlobalInits.push_back(Fn);
+ }
+
+ CurCGF->EmitStmt(D->getStmt());
+}
+
void CodeGenModule::EmitDeclContext(const DeclContext *DC) {
for (auto *I : DC->decls()) {
// Unlike other DeclContexts, the contents of an ObjCImplDecl at TU scope
@@ -6359,6 +6400,10 @@
break;
}
+ case Decl::TopLevelStmt:
+ EmitTopLevelStmt(cast<TopLevelStmtDecl>(D));
+ break;
+
case Decl::Import: {
auto *Import = cast<ImportDecl>(D);
Index: clang/lib/CodeGen/CGDecl.cpp
===================================================================
--- clang/lib/CodeGen/CGDecl.cpp
+++ clang/lib/CodeGen/CGDecl.cpp
@@ -90,6 +90,7 @@
case Decl::Export:
case Decl::ObjCPropertyImpl:
case Decl::FileScopeAsm:
+ case Decl::TopLevelStmt:
case Decl::Friend:
case Decl::FriendTemplate:
case Decl::Block:
Index: clang/lib/AST/DeclPrinter.cpp
===================================================================
--- clang/lib/AST/DeclPrinter.cpp
+++ clang/lib/AST/DeclPrinter.cpp
@@ -72,6 +72,7 @@
void VisitLabelDecl(LabelDecl *D);
void VisitParmVarDecl(ParmVarDecl *D);
void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
+ void VisitTopLevelStmtDecl(TopLevelStmtDecl *D);
void VisitImportDecl(ImportDecl *D);
void VisitStaticAssertDecl(StaticAssertDecl *D);
void VisitNamespaceDecl(NamespaceDecl *D);
@@ -932,6 +933,11 @@
Out << ")";
}
+void DeclPrinter::VisitTopLevelStmtDecl(TopLevelStmtDecl *D) {
+ assert(D->getStmt());
+ D->getStmt()->printPretty(Out, nullptr, Policy, Indentation, "\n", &Context);
+}
+
void DeclPrinter::VisitImportDecl(ImportDecl *D) {
Out << "@import " << D->getImportedModule()->getFullModuleName()
<< ";\n";
Index: clang/lib/AST/DeclBase.cpp
===================================================================
--- clang/lib/AST/DeclBase.cpp
+++ clang/lib/AST/DeclBase.cpp
@@ -843,6 +843,7 @@
case LinkageSpec:
case Export:
case FileScopeAsm:
+ case TopLevelStmt:
case StaticAssert:
case ObjCPropertyImpl:
case PragmaComment:
Index: clang/lib/AST/Decl.cpp
===================================================================
--- clang/lib/AST/Decl.cpp
+++ clang/lib/AST/Decl.cpp
@@ -5236,6 +5236,29 @@
SourceLocation());
}
+void TopLevelStmtDecl::anchor() {}
+
+TopLevelStmtDecl *TopLevelStmtDecl::Create(ASTContext &C, Stmt *Statement) {
+ assert(Statement);
+ assert(C.getLangOpts().IncrementalExtensions &&
+ "Must be used only in incremental mode");
+
+ SourceLocation BeginLoc = Statement->getBeginLoc();
+ DeclContext *DC = C.getTranslationUnitDecl();
+
+ return new (C, DC) TopLevelStmtDecl(DC, BeginLoc, Statement);
+}
+
+TopLevelStmtDecl *TopLevelStmtDecl::CreateDeserialized(ASTContext &C,
+ unsigned ID) {
+ return new (C, ID)
+ TopLevelStmtDecl(/*DC=*/nullptr, SourceLocation(), /*S=*/nullptr);
+}
+
+SourceRange TopLevelStmtDecl::getSourceRange() const {
+ return SourceRange(getLocation(), Statement->getEndLoc());
+}
+
void EmptyDecl::anchor() {}
EmptyDecl *EmptyDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) {
Index: clang/include/clang/Serialization/ASTBitCodes.h
===================================================================
--- clang/include/clang/Serialization/ASTBitCodes.h
+++ clang/include/clang/Serialization/ASTBitCodes.h
@@ -1318,6 +1318,9 @@
/// A FileScopeAsmDecl record.
DECL_FILE_SCOPE_ASM,
+ /// A TopLevelStmtDecl record.
+ DECL_TOP_LEVEL_STMT_DECL,
+
/// A BlockDecl record.
DECL_BLOCK,
Index: clang/include/clang/Sema/Template.h
===================================================================
--- clang/include/clang/Sema/Template.h
+++ clang/include/clang/Sema/Template.h
@@ -571,6 +571,7 @@
// Decls which never appear inside a class or function.
#define OBJCCONTAINER(DERIVED, BASE)
#define FILESCOPEASM(DERIVED, BASE)
+#define TOPLEVELSTMT(DERIVED, BASE)
#define IMPORT(DERIVED, BASE)
#define EXPORT(DERIVED, BASE)
#define LINKAGESPEC(DERIVED, BASE)
Index: clang/include/clang/Sema/Sema.h
===================================================================
--- clang/include/clang/Sema/Sema.h
+++ clang/include/clang/Sema/Sema.h
@@ -3106,6 +3106,8 @@
SourceLocation AsmLoc,
SourceLocation RParenLoc);
+ Decl *ActOnTopLevelStmtDecl(Stmt *Statement);
+
/// Handle a C++11 empty-declaration and attribute-declaration.
Decl *ActOnEmptyDeclaration(Scope *S, const ParsedAttributesView &AttrList,
SourceLocation SemiLoc);
Index: clang/include/clang/Parse/Parser.h
===================================================================
--- clang/include/clang/Parse/Parser.h
+++ clang/include/clang/Parse/Parser.h
@@ -464,6 +464,9 @@
typedef Sema::FullExprArg FullExprArg;
+ /// A SmallVector of statements.
+ typedef SmallVector<Stmt *, 32> StmtVector;
+
// Parsing methods.
/// Initialize - Warm up the parser.
@@ -2071,10 +2074,7 @@
//===--------------------------------------------------------------------===//
// C99 6.8: Statements and Blocks.
- /// A SmallVector of statements, with stack size 32 (as that is the only one
- /// used.)
- typedef SmallVector<Stmt*, 32> StmtVector;
- /// A SmallVector of expressions, with stack size 12 (the maximum used.)
+ /// A SmallVector of expressions.
typedef SmallVector<Expr*, 12> ExprVector;
StmtResult
@@ -2451,6 +2451,8 @@
ParsingDeclSpec &DS,
llvm::function_ref<void(ParsingFieldDeclarator &)> FieldsCallback);
+ DeclGroupPtrTy ParseTopLevelStmtDecl();
+
bool isDeclarationSpecifier(ImplicitTypenameContext AllowImplicitTypename,
bool DisambiguatingWithExpression = false);
bool isTypeSpecifierQualifier();
@@ -2472,10 +2474,13 @@
/// isDeclarationStatement - Disambiguates between a declaration or an
/// expression statement, when parsing function bodies.
+ ///
+ /// \param DisambiguatingWithExpression - True to indicate that the purpose of
+ /// this check is to disambiguate between an expression and a declaration.
/// Returns true for declaration, false for expression.
- bool isDeclarationStatement() {
+ bool isDeclarationStatement(bool DisambiguatingWithExpression = false) {
if (getLangOpts().CPlusPlus)
- return isCXXDeclarationStatement();
+ return isCXXDeclarationStatement(DisambiguatingWithExpression);
return isDeclarationSpecifier(ImplicitTypenameContext::No, true);
}
@@ -2542,7 +2547,7 @@
/// isCXXDeclarationStatement - C++-specialized function that disambiguates
/// between a declaration or an expression statement, when parsing function
/// bodies. Returns true for declaration, false for expression.
- bool isCXXDeclarationStatement();
+ bool isCXXDeclarationStatement(bool DisambiguatingWithExpression = false);
/// isCXXSimpleDeclaration - C++-specialized function that disambiguates
/// between a simple-declaration or an expression-statement.
Index: clang/include/clang/Lex/Preprocessor.h
===================================================================
--- clang/include/clang/Lex/Preprocessor.h
+++ clang/include/clang/Lex/Preprocessor.h
@@ -283,10 +283,6 @@
/// Empty line handler.
EmptylineHandler *Emptyline = nullptr;
- /// True if we want to ignore EOF token and continue later on (thus
- /// avoid tearing the Lexer and etc. down).
- bool IncrementalProcessing = false;
-
public:
/// The kind of translation unit we are processing.
const TranslationUnitKind TUKind;
@@ -1778,11 +1774,14 @@
void recomputeCurLexerKind();
/// Returns true if incremental processing is enabled
- bool isIncrementalProcessingEnabled() const { return IncrementalProcessing; }
+ bool isIncrementalProcessingEnabled() const {
+ return getLangOpts().IncrementalExtensions;
+ }
/// Enables the incremental processing
void enableIncrementalProcessing(bool value = true) {
- IncrementalProcessing = value;
+ // FIXME: Drop this interface.
+ const_cast<LangOptions &>(getLangOpts()).IncrementalExtensions = value;
}
/// Specify the point at which code-completion will be performed.
Index: clang/include/clang/Driver/Options.td
===================================================================
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -2320,6 +2320,13 @@
HelpText<"Do not enforce -fmodules-decluse and private header restrictions for textual headers. "
"This flag will be removed in a future Clang release.">;
+def fincremental_extensions :
+ Flag<["-"], "fincremental-extensions">,
+ Group<f_Group>, Flags<[CC1Option]>,
+ HelpText<"Enable incremental processing extensions such as processing"
+ "statements on the global scope.">,
+ MarshallingInfoFlag<LangOpts<"IncrementalExtensions">>;
+
def fvalidate_ast_input_files_content:
Flag <["-"], "fvalidate-ast-input-files-content">,
Group<f_Group>, Flags<[CC1Option]>,
Index: clang/include/clang/Basic/LangOptions.def
===================================================================
--- clang/include/clang/Basic/LangOptions.def
+++ clang/include/clang/Basic/LangOptions.def
@@ -459,6 +459,11 @@
// on large _BitInts.
BENIGN_VALUE_LANGOPT(MaxBitIntWidth, 32, 128, "Maximum width of a _BitInt")
+LANGOPT(IncrementalExtensions, 1, 0, " True if we want to process statements"
+ "on the global scope, ignore EOF token and continue later on (thus "
+ "avoid tearing the Lexer and etc. down). Controlled by "
+ "-fincremental-extensions.")
+
#undef LANGOPT
#undef COMPATIBLE_LANGOPT
#undef BENIGN_LANGOPT
Index: clang/include/clang/Basic/DeclNodes.td
===================================================================
--- clang/include/clang/Basic/DeclNodes.td
+++ clang/include/clang/Basic/DeclNodes.td
@@ -95,6 +95,7 @@
def Export : DeclNode<Decl>, DeclContext;
def ObjCPropertyImpl : DeclNode<Decl>;
def FileScopeAsm : DeclNode<Decl>;
+def TopLevelStmt : DeclNode<Decl>;
def AccessSpec : DeclNode<Decl>;
def Friend : DeclNode<Decl>;
def FriendTemplate : DeclNode<Decl>;
Index: clang/include/clang/AST/RecursiveASTVisitor.h
===================================================================
--- clang/include/clang/AST/RecursiveASTVisitor.h
+++ clang/include/clang/AST/RecursiveASTVisitor.h
@@ -1543,6 +1543,8 @@
DEF_TRAVERSE_DECL(FileScopeAsmDecl,
{ TRY_TO(TraverseStmt(D->getAsmString())); })
+DEF_TRAVERSE_DECL(TopLevelStmtDecl, { TRY_TO(TraverseStmt(D->getStmt())); })
+
DEF_TRAVERSE_DECL(ImportDecl, {})
DEF_TRAVERSE_DECL(FriendDecl, {
Index: clang/include/clang/AST/Decl.h
===================================================================
--- clang/include/clang/AST/Decl.h
+++ clang/include/clang/AST/Decl.h
@@ -4277,6 +4277,34 @@
static bool classofKind(Kind K) { return K == FileScopeAsm; }
};
+/// A declaration that models statements at global scope. This declaration
+/// supports incremental and interactive C/C++.
+///
+/// \note This is used in libInterpreter, clang -cc1 -fincremental-extensions
+/// and in tools such as clang-repl.
+class TopLevelStmtDecl : public Decl {
+ friend class ASTDeclReader;
+ friend class ASTDeclWriter;
+
+ Stmt *Statement = nullptr;
+
+ TopLevelStmtDecl(DeclContext *DC, SourceLocation L, Stmt *S)
+ : Decl(TopLevelStmt, DC, L), Statement(S) {}
+
+ virtual void anchor();
+
+public:
+ static TopLevelStmtDecl *Create(ASTContext &C, Stmt *Statement);
+ static TopLevelStmtDecl *CreateDeserialized(ASTContext &C, unsigned ID);
+
+ SourceRange getSourceRange() const override LLVM_READONLY;
+ Stmt *getStmt() { return Statement; }
+ const Stmt *getStmt() const { return Statement; }
+
+ static bool classof(const Decl *D) { return classofKind(D->getKind()); }
+ static bool classofKind(Kind K) { return K == TopLevelStmt; }
+};
+
/// Represents a block literal declaration, which is like an
/// unnamed FunctionDecl. For example:
/// ^{ statement-body } or ^(int arg1, float arg2){ statement-body }
Index: clang/include/clang/AST/ASTNodeTraverser.h
===================================================================
--- clang/include/clang/AST/ASTNodeTraverser.h
+++ clang/include/clang/AST/ASTNodeTraverser.h
@@ -476,6 +476,8 @@
Visit(D->getAsmString());
}
+ void VisitTopLevelStmtDecl(const TopLevelStmtDecl *D) { Visit(D->getStmt()); }
+
void VisitCapturedDecl(const CapturedDecl *D) { Visit(D->getBody()); }
void VisitOMPThreadPrivateDecl(const OMPThreadPrivateDecl *D) {
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