forked from OSchip/llvm-project
246 lines
9.3 KiB
C++
246 lines
9.3 KiB
C++
//===--- Sema.cpp - AST Builder and Semantic Analysis Implementation ------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the actions class which performs semantic analysis and
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// builds an AST out of a parse stream.
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//
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//===----------------------------------------------------------------------===//
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#include "Sema.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/Expr.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Basic/Diagnostic.h"
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using namespace clang;
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static inline RecordDecl *CreateStructDecl(ASTContext &C, const char *Name)
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{
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if (C.getLangOptions().CPlusPlus)
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return CXXRecordDecl::Create(C, TagDecl::TK_struct,
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C.getTranslationUnitDecl(),
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SourceLocation(), &C.Idents.get(Name));
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else
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return RecordDecl::Create(C, TagDecl::TK_struct,
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C.getTranslationUnitDecl(),
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SourceLocation(), &C.Idents.get(Name));
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}
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void Sema::ActOnTranslationUnitScope(SourceLocation Loc, Scope *S) {
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TUScope = S;
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PushDeclContext(Context.getTranslationUnitDecl());
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if (!PP.getLangOptions().ObjC1) return;
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// Synthesize "typedef struct objc_selector *SEL;"
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RecordDecl *SelTag = CreateStructDecl(Context, "objc_selector");
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PushOnScopeChains(SelTag, TUScope);
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QualType SelT = Context.getPointerType(Context.getTagDeclType(SelTag));
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TypedefDecl *SelTypedef = TypedefDecl::Create(Context, CurContext,
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SourceLocation(),
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&Context.Idents.get("SEL"),
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SelT, 0);
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PushOnScopeChains(SelTypedef, TUScope);
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Context.setObjCSelType(SelTypedef);
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// FIXME: Make sure these don't leak!
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RecordDecl *ClassTag = CreateStructDecl(Context, "objc_class");
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QualType ClassT = Context.getPointerType(Context.getTagDeclType(ClassTag));
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TypedefDecl *ClassTypedef =
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TypedefDecl::Create(Context, CurContext, SourceLocation(),
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&Context.Idents.get("Class"), ClassT, 0);
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PushOnScopeChains(ClassTag, TUScope);
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PushOnScopeChains(ClassTypedef, TUScope);
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Context.setObjCClassType(ClassTypedef);
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// Synthesize "@class Protocol;
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ObjCInterfaceDecl *ProtocolDecl =
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ObjCInterfaceDecl::Create(Context, SourceLocation(),
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&Context.Idents.get("Protocol"),
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SourceLocation(), true);
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Context.setObjCProtoType(Context.getObjCInterfaceType(ProtocolDecl));
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PushOnScopeChains(ProtocolDecl, TUScope);
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// Synthesize "typedef struct objc_object { Class isa; } *id;"
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RecordDecl *ObjectTag = CreateStructDecl(Context, "objc_object");
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QualType ObjT = Context.getPointerType(Context.getTagDeclType(ObjectTag));
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PushOnScopeChains(ObjectTag, TUScope);
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TypedefDecl *IdTypedef = TypedefDecl::Create(Context, CurContext,
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SourceLocation(),
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&Context.Idents.get("id"),
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ObjT, 0);
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PushOnScopeChains(IdTypedef, TUScope);
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Context.setObjCIdType(IdTypedef);
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}
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Sema::Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer)
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: PP(pp), Context(ctxt), Consumer(consumer), CurContext(0),PreDeclaratorDC(0),
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CurBlock(0), PackContext(0), IdResolver(pp.getLangOptions()) {
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// Get IdentifierInfo objects for known functions for which we
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// do extra checking.
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IdentifierTable &IT = PP.getIdentifierTable();
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KnownFunctionIDs[id_printf] = &IT.get("printf");
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KnownFunctionIDs[id_fprintf] = &IT.get("fprintf");
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KnownFunctionIDs[id_sprintf] = &IT.get("sprintf");
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KnownFunctionIDs[id_sprintf_chk] = &IT.get("__builtin___sprintf_chk");
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KnownFunctionIDs[id_snprintf] = &IT.get("snprintf");
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KnownFunctionIDs[id_snprintf_chk] = &IT.get("__builtin___snprintf_chk");
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KnownFunctionIDs[id_asprintf] = &IT.get("asprintf");
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KnownFunctionIDs[id_NSLog] = &IT.get("NSLog");
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KnownFunctionIDs[id_vsnprintf] = &IT.get("vsnprintf");
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KnownFunctionIDs[id_vasprintf] = &IT.get("vasprintf");
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KnownFunctionIDs[id_vfprintf] = &IT.get("vfprintf");
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KnownFunctionIDs[id_vsprintf] = &IT.get("vsprintf");
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KnownFunctionIDs[id_vsprintf_chk] = &IT.get("__builtin___vsprintf_chk");
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KnownFunctionIDs[id_vsnprintf] = &IT.get("vsnprintf");
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KnownFunctionIDs[id_vsnprintf_chk] = &IT.get("__builtin___vsnprintf_chk");
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KnownFunctionIDs[id_vprintf] = &IT.get("vprintf");
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SuperID = &IT.get("super");
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// ObjC builtin typedef names.
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Ident_id = &IT.get("id");
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Ident_Class = &IT.get("Class");
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Ident_SEL = &IT.get("SEL");
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Ident_Protocol = &IT.get("Protocol");
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Ident_StdNs = &IT.get("std");
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Ident_TypeInfo = 0;
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StdNamespace = 0;
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TUScope = 0;
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if (getLangOptions().CPlusPlus)
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FieldCollector.reset(new CXXFieldCollector());
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}
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/// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit cast.
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/// If there is already an implicit cast, merge into the existing one.
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/// If isLvalue, the result of the cast is an lvalue.
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void Sema::ImpCastExprToType(Expr *&Expr, QualType Ty, bool isLvalue) {
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QualType ExprTy = Context.getCanonicalType(Expr->getType());
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QualType TypeTy = Context.getCanonicalType(Ty);
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if (ExprTy == TypeTy)
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return;
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if (Expr->getType().getTypePtr()->isPointerType() &&
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Ty.getTypePtr()->isPointerType()) {
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QualType ExprBaseType =
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cast<PointerType>(ExprTy.getUnqualifiedType())->getPointeeType();
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QualType BaseType =
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cast<PointerType>(TypeTy.getUnqualifiedType())->getPointeeType();
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if (ExprBaseType.getAddressSpace() != BaseType.getAddressSpace()) {
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Diag(Expr->getExprLoc(), diag::err_implicit_pointer_address_space_cast,
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Expr->getSourceRange());
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}
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}
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if (ImplicitCastExpr *ImpCast = dyn_cast<ImplicitCastExpr>(Expr)) {
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ImpCast->setType(Ty);
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ImpCast->setLvalueCast(isLvalue);
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} else
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Expr = new ImplicitCastExpr(Ty, Expr, isLvalue);
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}
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void Sema::DeleteExpr(ExprTy *E) {
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delete static_cast<Expr*>(E);
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}
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void Sema::DeleteStmt(StmtTy *S) {
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delete static_cast<Stmt*>(S);
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}
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/// ActOnEndOfTranslationUnit - This is called at the very end of the
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/// translation unit when EOF is reached and all but the top-level scope is
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/// popped.
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void Sema::ActOnEndOfTranslationUnit() {
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}
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//===----------------------------------------------------------------------===//
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// Helper functions.
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//===----------------------------------------------------------------------===//
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bool Sema::Diag(SourceLocation Loc, unsigned DiagID) {
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PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID);
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return true;
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}
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bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg) {
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PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, &Msg, 1);
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return true;
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}
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bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1,
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const std::string &Msg2) {
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std::string MsgArr[] = { Msg1, Msg2 };
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PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, MsgArr, 2);
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return true;
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}
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bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const SourceRange& Range) {
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PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, 0, 0, &Range,1);
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return true;
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}
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bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg,
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const SourceRange& Range) {
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PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, &Msg, 1, &Range,1);
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return true;
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}
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bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1,
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const std::string &Msg2, const SourceRange& Range) {
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std::string MsgArr[] = { Msg1, Msg2 };
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PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, MsgArr, 2, &Range, 1);
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return true;
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}
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bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1,
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const std::string &Msg2, const std::string &Msg3,
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const SourceRange& R1) {
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std::string MsgArr[] = { Msg1, Msg2, Msg3 };
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PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, MsgArr, 3, &R1, 1);
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return true;
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}
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bool Sema::Diag(SourceLocation Loc, unsigned DiagID,
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const SourceRange& R1, const SourceRange& R2) {
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SourceRange RangeArr[] = { R1, R2 };
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PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, 0, 0, RangeArr, 2);
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return true;
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}
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bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg,
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const SourceRange& R1, const SourceRange& R2) {
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SourceRange RangeArr[] = { R1, R2 };
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PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, &Msg, 1, RangeArr, 2);
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return true;
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}
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bool Sema::Diag(SourceLocation Range, unsigned DiagID, const std::string &Msg1,
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const std::string &Msg2, const SourceRange& R1,
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const SourceRange& R2) {
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std::string MsgArr[] = { Msg1, Msg2 };
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SourceRange RangeArr[] = { R1, R2 };
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PP.getDiagnostics().Report(PP.getFullLoc(Range),DiagID, MsgArr,2,RangeArr, 2);
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return true;
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}
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const LangOptions &Sema::getLangOptions() const {
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return PP.getLangOptions();
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}
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ObjCMethodDecl *Sema::getCurMethodDecl() {
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return dyn_cast<ObjCMethodDecl>(CurContext);
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}
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