Make a major restructuring of the clang tree: introduce a top-level

lib dir and move all the libraries into it.  This follows the main
llvm tree, and allows the libraries to be built in parallel.  The
top level now enforces that all the libs are built before Driver,
but we don't care what order the libs are built in.  This speeds
up parallel builds, particularly incremental ones.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@48402 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 222 insertions, 0 deletions

diff --git a/lib/Sema/Sema.cpp b/lib/Sema/Sema.cpp
new file mode 100644
index 0000000000..4bd04e3a1a
--- /dev/null
+++ b/lib/Sema/Sema.cpp
@@ -0,0 +1,222 @@
+//===--- Sema.cpp - AST Builder and Semantic Analysis Implementation ------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the actions class which performs semantic analysis and
+// builds an AST out of a parse stream.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Sema.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Parse/Scope.h"
+
+using namespace clang;
+
+bool Sema::isBuiltinObjCType(TypedefDecl *TD) {
+  const char *typeName = TD->getIdentifier()->getName();
+  return strcmp(typeName, "id") == 0 || strcmp(typeName, "Class") == 0 ||
+         strcmp(typeName, "SEL") == 0 || strcmp(typeName, "Protocol") == 0;
+}
+
+bool Sema::isObjCObjectPointerType(QualType type) const {
+  if (!type->isPointerType() && !type->isObjCQualifiedIdType())
+    return false;
+  if (type == Context.getObjCIdType() || type == Context.getObjCClassType() ||
+      type->isObjCQualifiedIdType())
+    return true;
+  
+  if (type->isPointerType()) {
+    PointerType *pointerType = static_cast<PointerType*>(type.getTypePtr());
+    type = pointerType->getPointeeType();
+  }
+  return (type->isObjCInterfaceType() || type->isObjCQualifiedIdType());
+}
+
+void Sema::ActOnTranslationUnitScope(SourceLocation Loc, Scope *S) {
+  TUScope = S;
+  if (!PP.getLangOptions().ObjC1) return;
+  
+  TypedefType *t;
+  
+  // Add the built-in ObjC types.
+  t = cast<TypedefType>(Context.getObjCIdType().getTypePtr());
+  t->getDecl()->getIdentifier()->setFETokenInfo(t->getDecl());
+  TUScope->AddDecl(t->getDecl());
+  t = cast<TypedefType>(Context.getObjCClassType().getTypePtr());
+  t->getDecl()->getIdentifier()->setFETokenInfo(t->getDecl());
+  TUScope->AddDecl(t->getDecl());
+  ObjCInterfaceType *it = cast<ObjCInterfaceType>(Context.getObjCProtoType());
+  ObjCInterfaceDecl *IDecl = it->getDecl();
+  IDecl->getIdentifier()->setFETokenInfo(IDecl);
+  TUScope->AddDecl(IDecl);
+  
+  // Synthesize "typedef struct objc_selector *SEL;"
+  RecordDecl *SelTag = RecordDecl::Create(Context, Decl::Struct,
+                                          SourceLocation(), 
+                                          &Context.Idents.get("objc_selector"),
+                                          0);
+  SelTag->getIdentifier()->setFETokenInfo(SelTag);
+  TUScope->AddDecl(SelTag);
+  
+  QualType SelT = Context.getPointerType(Context.getTagDeclType(SelTag));
+  TypedefDecl *SelTypedef = TypedefDecl::Create(Context, SourceLocation(),
+                                                &Context.Idents.get("SEL"),
+                                                SelT, 0);
+  SelTypedef->getIdentifier()->setFETokenInfo(SelTypedef);
+  TUScope->AddDecl(SelTypedef);
+  Context.setObjCSelType(SelTypedef);
+}
+
+Sema::Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer)
+  : PP(pp), Context(ctxt), Consumer(consumer), 
+    CurFunctionDecl(0), CurMethodDecl(0) {
+  
+  // Get IdentifierInfo objects for known functions for which we
+  // do extra checking.  
+  IdentifierTable &IT = PP.getIdentifierTable();  
+
+  KnownFunctionIDs[id_printf]    = &IT.get("printf");
+  KnownFunctionIDs[id_fprintf]   = &IT.get("fprintf");
+  KnownFunctionIDs[id_sprintf]   = &IT.get("sprintf");
+  KnownFunctionIDs[id_snprintf]  = &IT.get("snprintf");
+  KnownFunctionIDs[id_asprintf]  = &IT.get("asprintf");
+  KnownFunctionIDs[id_vsnprintf] = &IT.get("vsnprintf");
+  KnownFunctionIDs[id_vasprintf] = &IT.get("vasprintf");
+  KnownFunctionIDs[id_vfprintf]  = &IT.get("vfprintf");
+  KnownFunctionIDs[id_vsprintf]  = &IT.get("vsprintf");
+  KnownFunctionIDs[id_vprintf]   = &IT.get("vprintf");
+
+  // FIXME: Move this initialization up to Sema::ActOnTranslationUnitScope()
+  // and make sure the decls get inserted into TUScope!
+  if (PP.getLangOptions().ObjC1) {
+    // Synthesize "typedef struct objc_class *Class;"
+    RecordDecl *ClassTag = RecordDecl::Create(Context, Decl::Struct,
+                                              SourceLocation(), 
+                                              &IT.get("objc_class"), 0);
+    QualType ClassT = Context.getPointerType(Context.getTagDeclType(ClassTag));
+    TypedefDecl *ClassTypedef = 
+      TypedefDecl::Create(Context, SourceLocation(),
+                          &Context.Idents.get("Class"), ClassT, 0);
+    Context.setObjCClassType(ClassTypedef);
+    
+    // Synthesize "@class Protocol;
+    ObjCInterfaceDecl *ProtocolDecl = new ObjCInterfaceDecl(SourceLocation(), 0, 
+                                        &Context.Idents.get("Protocol"), true);
+    Context.setObjCProtoType(Context.getObjCInterfaceType(ProtocolDecl));
+    
+    // Synthesize "typedef struct objc_object { Class isa; } *id;"
+    RecordDecl *ObjectTag = 
+      RecordDecl::Create(Context, Decl::Struct, SourceLocation(),
+                         &IT.get("objc_object"), 0);
+    FieldDecl *IsaDecl = new FieldDecl(SourceLocation(), 0, 
+                                       Context.getObjCClassType());
+    ObjectTag->defineBody(&IsaDecl, 1);
+    QualType ObjT = Context.getPointerType(Context.getTagDeclType(ObjectTag));
+    TypedefDecl *IdTypedef = TypedefDecl::Create(Context, SourceLocation(),
+                                                 &Context.Idents.get("id"),
+                                                 ObjT, 0);
+    Context.setObjCIdType(IdTypedef);
+  }
+  TUScope = 0;
+}
+
+/// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit cast. 
+/// If there is already an implicit cast, merge into the existing one.
+void Sema::ImpCastExprToType(Expr *&Expr, QualType Type) {
+  if (Expr->getType().getCanonicalType() == Type.getCanonicalType()) return;
+  
+  if (ImplicitCastExpr *ImpCast = dyn_cast<ImplicitCastExpr>(Expr))
+    ImpCast->setType(Type);
+  else 
+    Expr = new ImplicitCastExpr(Type, Expr);
+}
+
+
+
+void Sema::DeleteExpr(ExprTy *E) {
+  delete static_cast<Expr*>(E);
+}
+void Sema::DeleteStmt(StmtTy *S) {
+  delete static_cast<Stmt*>(S);
+}
+
+//===----------------------------------------------------------------------===//
+// Helper functions.
+//===----------------------------------------------------------------------===//
+
+bool Sema::Diag(SourceLocation Loc, unsigned DiagID) {
+  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID);
+  return true;
+}
+
+bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg) {
+  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID,  &Msg, 1);
+  return true;
+}
+
+bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1,
+                const std::string &Msg2) {
+  std::string MsgArr[] = { Msg1, Msg2 };
+  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID,  MsgArr, 2);
+  return true;
+}
+
+bool Sema::Diag(SourceLocation Loc, unsigned DiagID, SourceRange Range) {
+  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, 0, 0, &Range,1);
+  return true;
+}
+
+bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg,
+                SourceRange Range) {
+  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, &Msg, 1, &Range,1);
+  return true;
+}
+
+bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1,
+                const std::string &Msg2, SourceRange Range) {
+  std::string MsgArr[] = { Msg1, Msg2 };
+  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, MsgArr, 2, &Range, 1);
+  return true;
+}
+
+bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1, 
+                const std::string &Msg2, const std::string &Msg3, 
+                SourceRange R1) {
+  std::string MsgArr[] = { Msg1, Msg2, Msg3 };
+  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, MsgArr, 3, &R1, 1);
+  return true;
+}
+
+bool Sema::Diag(SourceLocation Loc, unsigned DiagID,
+                SourceRange R1, SourceRange R2) {
+  SourceRange RangeArr[] = { R1, R2 };
+  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, 0, 0, RangeArr, 2);
+  return true;
+}
+
+bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg,
+                SourceRange R1, SourceRange R2) {
+  SourceRange RangeArr[] = { R1, R2 };
+  PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID,  &Msg, 1, RangeArr, 2);
+  return true;
+}
+
+bool Sema::Diag(SourceLocation Range, unsigned DiagID, const std::string &Msg1,
+                const std::string &Msg2, SourceRange R1, SourceRange R2) {
+  std::string MsgArr[] = { Msg1, Msg2 };
+  SourceRange RangeArr[] = { R1, R2 };
+  PP.getDiagnostics().Report(PP.getFullLoc(Range),DiagID, MsgArr,2,RangeArr, 2);
+  return true;
+}
+
+const LangOptions &Sema::getLangOptions() const {
+  return PP.getLangOptions();
+}