зеркало из https://github.com/microsoft/clang-1.git
1192 строки
40 KiB
C++
1192 строки
40 KiB
C++
//===--- SemaDeclAttr.cpp - Declaration Attribute Handling ----------------===//
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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 decl-related attribute processing.
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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/Basic/Diagnostic.h"
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#include "clang/Basic/TargetInfo.h"
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#include "clang/Parse/DeclSpec.h"
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#include <llvm/ADT/StringExtras.h>
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// Helper functions
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//===----------------------------------------------------------------------===//
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static const FunctionType *getFunctionType(Decl *d) {
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QualType Ty;
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if (ValueDecl *decl = dyn_cast<ValueDecl>(d))
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Ty = decl->getType();
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else if (FieldDecl *decl = dyn_cast<FieldDecl>(d))
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Ty = decl->getType();
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else if (TypedefDecl* decl = dyn_cast<TypedefDecl>(d))
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Ty = decl->getUnderlyingType();
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else
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return 0;
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if (Ty->isFunctionPointerType())
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Ty = Ty->getAsPointerType()->getPointeeType();
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return Ty->getAsFunctionType();
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}
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// FIXME: We should provide an abstraction around a method or function
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// to provide the following bits of information.
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/// isFunctionOrMethod - Return true if the given decl has function
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/// type (function or function-typed variable) or an Objective-C
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/// method.
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static bool isFunctionOrMethod(Decl *d) {
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return getFunctionType(d) || isa<ObjCMethodDecl>(d);
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}
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/// hasFunctionProto - Return true if the given decl has a argument
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/// information. This decl should have already passed
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/// isFunctionOrMethod.
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static bool hasFunctionProto(Decl *d) {
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if (const FunctionType *FnTy = getFunctionType(d)) {
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return isa<FunctionTypeProto>(FnTy);
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} else {
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assert(isa<ObjCMethodDecl>(d));
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return true;
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}
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}
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/// getFunctionOrMethodNumArgs - Return number of function or method
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/// arguments. It is an error to call this on a K&R function (use
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/// hasFunctionProto first).
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static unsigned getFunctionOrMethodNumArgs(Decl *d) {
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if (const FunctionType *FnTy = getFunctionType(d)) {
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const FunctionTypeProto *proto = cast<FunctionTypeProto>(FnTy);
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return proto->getNumArgs();
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} else {
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return cast<ObjCMethodDecl>(d)->getNumParams();
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}
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}
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static QualType getFunctionOrMethodArgType(Decl *d, unsigned Idx) {
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if (const FunctionType *FnTy = getFunctionType(d)) {
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const FunctionTypeProto *proto = cast<FunctionTypeProto>(FnTy);
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return proto->getArgType(Idx);
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} else {
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return cast<ObjCMethodDecl>(d)->getParamDecl(Idx)->getType();
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}
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}
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static bool isFunctionOrMethodVariadic(Decl *d) {
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if (const FunctionType *FnTy = getFunctionType(d)) {
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const FunctionTypeProto *proto = cast<FunctionTypeProto>(FnTy);
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return proto->isVariadic();
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} else {
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return cast<ObjCMethodDecl>(d)->isVariadic();
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}
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}
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static inline bool isNSStringType(QualType T, ASTContext &Ctx) {
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const PointerType *PT = T->getAsPointerType();
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if (!PT)
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return false;
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const ObjCInterfaceType *ClsT =PT->getPointeeType()->getAsObjCInterfaceType();
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if (!ClsT)
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return false;
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IdentifierInfo* ClsName = ClsT->getDecl()->getIdentifier();
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// FIXME: Should we walk the chain of classes?
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return ClsName == &Ctx.Idents.get("NSString") ||
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ClsName == &Ctx.Idents.get("NSMutableString");
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}
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static inline bool isCFStringType(QualType T, ASTContext &Ctx) {
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const PointerType *PT = T->getAsPointerType();
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if (!PT)
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return false;
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const RecordType *RT = PT->getPointeeType()->getAsRecordType();
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if (!RT)
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return false;
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const RecordDecl *RD = RT->getDecl();
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if (RD->getTagKind() != TagDecl::TK_struct)
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return false;
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return RD->getIdentifier() == &Ctx.Idents.get("__CFString");
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}
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//===----------------------------------------------------------------------===//
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// Attribute Implementations
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//===----------------------------------------------------------------------===//
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// FIXME: All this manual attribute parsing code is gross. At the
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// least add some helper functions to check most argument patterns (#
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// and types of args).
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static void HandleExtVectorTypeAttr(Decl *d, const AttributeList &Attr,
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Sema &S) {
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TypedefDecl *tDecl = dyn_cast<TypedefDecl>(d);
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if (tDecl == 0) {
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S.Diag(Attr.getLoc(), diag::err_typecheck_ext_vector_not_typedef);
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return;
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}
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QualType curType = tDecl->getUnderlyingType();
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// check the attribute arguments.
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if (Attr.getNumArgs() != 1) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
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return;
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}
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Expr *sizeExpr = static_cast<Expr *>(Attr.getArg(0));
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llvm::APSInt vecSize(32);
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if (!sizeExpr->isIntegerConstantExpr(vecSize, S.Context)) {
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S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
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<< "ext_vector_type" << sizeExpr->getSourceRange();
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return;
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}
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// unlike gcc's vector_size attribute, we do not allow vectors to be defined
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// in conjunction with complex types (pointers, arrays, functions, etc.).
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if (!curType->isIntegerType() && !curType->isRealFloatingType()) {
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S.Diag(Attr.getLoc(), diag::err_attribute_invalid_vector_type) << curType;
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return;
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}
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// unlike gcc's vector_size attribute, the size is specified as the
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// number of elements, not the number of bytes.
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unsigned vectorSize = static_cast<unsigned>(vecSize.getZExtValue());
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if (vectorSize == 0) {
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S.Diag(Attr.getLoc(), diag::err_attribute_zero_size)
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<< sizeExpr->getSourceRange();
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return;
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}
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// Instantiate/Install the vector type, the number of elements is > 0.
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tDecl->setUnderlyingType(S.Context.getExtVectorType(curType, vectorSize));
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// Remember this typedef decl, we will need it later for diagnostics.
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S.ExtVectorDecls.push_back(tDecl);
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}
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/// HandleVectorSizeAttribute - this attribute is only applicable to
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/// integral and float scalars, although arrays, pointers, and function
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/// return values are allowed in conjunction with this construct. Aggregates
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/// with this attribute are invalid, even if they are of the same size as a
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/// corresponding scalar.
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/// The raw attribute should contain precisely 1 argument, the vector size
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/// for the variable, measured in bytes. If curType and rawAttr are well
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/// formed, this routine will return a new vector type.
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static void HandleVectorSizeAttr(Decl *D, const AttributeList &Attr, Sema &S) {
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QualType CurType;
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if (ValueDecl *VD = dyn_cast<ValueDecl>(D))
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CurType = VD->getType();
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else if (TypedefDecl *TD = dyn_cast<TypedefDecl>(D))
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CurType = TD->getUnderlyingType();
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else {
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S.Diag(D->getLocation(), diag::err_attr_wrong_decl)
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<< "vector_size" << SourceRange(Attr.getLoc(), Attr.getLoc());
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return;
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}
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// Check the attribute arugments.
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if (Attr.getNumArgs() != 1) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
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return;
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}
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Expr *sizeExpr = static_cast<Expr *>(Attr.getArg(0));
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llvm::APSInt vecSize(32);
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if (!sizeExpr->isIntegerConstantExpr(vecSize, S.Context)) {
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S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
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<< "vector_size" << sizeExpr->getSourceRange();
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return;
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}
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// navigate to the base type - we need to provide for vector pointers,
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// vector arrays, and functions returning vectors.
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if (CurType->isPointerType() || CurType->isArrayType() ||
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CurType->isFunctionType()) {
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assert(0 && "HandleVector(): Complex type construction unimplemented");
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/* FIXME: rebuild the type from the inside out, vectorizing the inner type.
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do {
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if (PointerType *PT = dyn_cast<PointerType>(canonType))
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canonType = PT->getPointeeType().getTypePtr();
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else if (ArrayType *AT = dyn_cast<ArrayType>(canonType))
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canonType = AT->getElementType().getTypePtr();
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else if (FunctionType *FT = dyn_cast<FunctionType>(canonType))
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canonType = FT->getResultType().getTypePtr();
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} while (canonType->isPointerType() || canonType->isArrayType() ||
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canonType->isFunctionType());
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*/
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}
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// the base type must be integer or float.
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if (!CurType->isIntegerType() && !CurType->isRealFloatingType()) {
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S.Diag(Attr.getLoc(), diag::err_attribute_invalid_vector_type) << CurType;
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return;
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}
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unsigned typeSize = static_cast<unsigned>(S.Context.getTypeSize(CurType));
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// vecSize is specified in bytes - convert to bits.
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unsigned vectorSize = static_cast<unsigned>(vecSize.getZExtValue() * 8);
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// the vector size needs to be an integral multiple of the type size.
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if (vectorSize % typeSize) {
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S.Diag(Attr.getLoc(), diag::err_attribute_invalid_size)
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<< sizeExpr->getSourceRange();
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return;
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}
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if (vectorSize == 0) {
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S.Diag(Attr.getLoc(), diag::err_attribute_zero_size)
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<< sizeExpr->getSourceRange();
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return;
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}
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// Success! Instantiate the vector type, the number of elements is > 0, and
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// not required to be a power of 2, unlike GCC.
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CurType = S.Context.getVectorType(CurType, vectorSize/typeSize);
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if (ValueDecl *VD = dyn_cast<ValueDecl>(D))
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VD->setType(CurType);
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else
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cast<TypedefDecl>(D)->setUnderlyingType(CurType);
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}
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static void HandlePackedAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() > 0) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
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return;
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}
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if (TagDecl *TD = dyn_cast<TagDecl>(d))
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TD->addAttr(new PackedAttr(1));
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else if (FieldDecl *FD = dyn_cast<FieldDecl>(d)) {
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// If the alignment is less than or equal to 8 bits, the packed attribute
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// has no effect.
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if (!FD->getType()->isIncompleteType() &&
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S.Context.getTypeAlign(FD->getType()) <= 8)
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S.Diag(Attr.getLoc(), diag::warn_attribute_ignored_for_field_of_type)
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<< Attr.getName() << FD->getType();
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else
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FD->addAttr(new PackedAttr(1));
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} else
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S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << Attr.getName();
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}
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static void HandleIBOutletAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() > 0) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
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return;
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}
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// The IBOutlet attribute only applies to instance variables of Objective-C
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// classes.
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if (ObjCIvarDecl *ID = dyn_cast<ObjCIvarDecl>(d))
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ID->addAttr(new IBOutletAttr());
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else
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S.Diag(Attr.getLoc(), diag::err_attribute_iboutlet_non_ivar);
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}
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static void HandleNonNullAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// GCC ignores the nonnull attribute on K&R style function
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// prototypes, so we ignore it as well
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if (!isFunctionOrMethod(d) || !hasFunctionProto(d)) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
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<< "nonnull" << "function";
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return;
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}
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unsigned NumArgs = getFunctionOrMethodNumArgs(d);
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// The nonnull attribute only applies to pointers.
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llvm::SmallVector<unsigned, 10> NonNullArgs;
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for (AttributeList::arg_iterator I=Attr.arg_begin(),
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E=Attr.arg_end(); I!=E; ++I) {
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// The argument must be an integer constant expression.
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Expr *Ex = static_cast<Expr *>(*I);
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llvm::APSInt ArgNum(32);
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if (!Ex->isIntegerConstantExpr(ArgNum, S.Context)) {
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S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
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<< "nonnull" << Ex->getSourceRange();
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return;
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}
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unsigned x = (unsigned) ArgNum.getZExtValue();
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if (x < 1 || x > NumArgs) {
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S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds)
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<< "nonnull" << I.getArgNum() << Ex->getSourceRange();
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return;
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}
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--x;
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// Is the function argument a pointer type?
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QualType T = getFunctionOrMethodArgType(d, x);
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if (!T->isPointerType() && !T->isBlockPointerType()) {
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// FIXME: Should also highlight argument in decl.
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S.Diag(Attr.getLoc(), diag::err_nonnull_pointers_only)
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<< "nonnull" << Ex->getSourceRange();
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continue;
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}
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NonNullArgs.push_back(x);
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}
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// If no arguments were specified to __attribute__((nonnull)) then all
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// pointer arguments have a nonnull attribute.
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if (NonNullArgs.empty()) {
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for (unsigned I = 0, E = getFunctionOrMethodNumArgs(d); I != E; ++I) {
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QualType T = getFunctionOrMethodArgType(d, I);
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if (T->isPointerType() || T->isBlockPointerType())
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NonNullArgs.push_back(I);
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}
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if (NonNullArgs.empty()) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_nonnull_no_pointers);
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return;
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}
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}
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unsigned* start = &NonNullArgs[0];
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unsigned size = NonNullArgs.size();
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std::sort(start, start + size);
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d->addAttr(new NonNullAttr(start, size));
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}
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static void HandleAliasAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 1) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
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return;
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}
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Expr *Arg = static_cast<Expr*>(Attr.getArg(0));
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Arg = Arg->IgnoreParenCasts();
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StringLiteral *Str = dyn_cast<StringLiteral>(Arg);
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if (Str == 0 || Str->isWide()) {
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S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string)
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<< "alias" << 1;
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return;
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}
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const char *Alias = Str->getStrData();
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unsigned AliasLen = Str->getByteLength();
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// FIXME: check if target symbol exists in current file
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d->addAttr(new AliasAttr(std::string(Alias, AliasLen)));
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}
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static void HandleAlwaysInlineAttr(Decl *d, const AttributeList &Attr,
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Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 0) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
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return;
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}
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d->addAttr(new AlwaysInlineAttr());
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}
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static void HandleNoReturnAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 0) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
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return;
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}
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if (!isFunctionOrMethod(d)) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
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<< "noreturn" << "function";
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return;
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}
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d->addAttr(new NoReturnAttr());
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}
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static void HandleUnusedAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 0) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
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return;
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}
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if (!isa<VarDecl>(d) && !isFunctionOrMethod(d)) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
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<< "unused" << "variable and function";
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return;
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}
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d->addAttr(new UnusedAttr());
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}
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static void HandleConstructorAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 0 && Attr.getNumArgs() != 1) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments)
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<< "0 or 1";
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return;
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}
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int priority = 65535; // FIXME: Do not hardcode such constants.
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if (Attr.getNumArgs() > 0) {
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Expr *E = static_cast<Expr *>(Attr.getArg(0));
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llvm::APSInt Idx(32);
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if (!E->isIntegerConstantExpr(Idx, S.Context)) {
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S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
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<< "constructor" << 1 << E->getSourceRange();
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return;
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}
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priority = Idx.getZExtValue();
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}
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FunctionDecl *Fn = dyn_cast<FunctionDecl>(d);
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if (!Fn) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
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<< "constructor" << "function";
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return;
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}
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d->addAttr(new ConstructorAttr(priority));
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}
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static void HandleDestructorAttr(Decl *d, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs() != 0 && Attr.getNumArgs() != 1) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments)
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<< "0 or 1";
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return;
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}
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int priority = 65535; // FIXME: Do not hardcode such constants.
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if (Attr.getNumArgs() > 0) {
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Expr *E = static_cast<Expr *>(Attr.getArg(0));
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llvm::APSInt Idx(32);
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if (!E->isIntegerConstantExpr(Idx, S.Context)) {
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S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
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<< "destructor" << 1 << E->getSourceRange();
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return;
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}
|
|
priority = Idx.getZExtValue();
|
|
}
|
|
|
|
if (!isa<FunctionDecl>(d)) {
|
|
S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
|
|
<< "destructor" << "function";
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new DestructorAttr(priority));
|
|
}
|
|
|
|
static void HandleDeprecatedAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new DeprecatedAttr());
|
|
}
|
|
|
|
static void HandleUnavailableAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new UnavailableAttr());
|
|
}
|
|
|
|
static void HandleVisibilityAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() != 1) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
|
|
return;
|
|
}
|
|
|
|
Expr *Arg = static_cast<Expr*>(Attr.getArg(0));
|
|
Arg = Arg->IgnoreParenCasts();
|
|
StringLiteral *Str = dyn_cast<StringLiteral>(Arg);
|
|
|
|
if (Str == 0 || Str->isWide()) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string)
|
|
<< "visibility" << 1;
|
|
return;
|
|
}
|
|
|
|
const char *TypeStr = Str->getStrData();
|
|
unsigned TypeLen = Str->getByteLength();
|
|
VisibilityAttr::VisibilityTypes type;
|
|
|
|
if (TypeLen == 7 && !memcmp(TypeStr, "default", 7))
|
|
type = VisibilityAttr::DefaultVisibility;
|
|
else if (TypeLen == 6 && !memcmp(TypeStr, "hidden", 6))
|
|
type = VisibilityAttr::HiddenVisibility;
|
|
else if (TypeLen == 8 && !memcmp(TypeStr, "internal", 8))
|
|
type = VisibilityAttr::HiddenVisibility; // FIXME
|
|
else if (TypeLen == 9 && !memcmp(TypeStr, "protected", 9))
|
|
type = VisibilityAttr::ProtectedVisibility;
|
|
else {
|
|
S.Diag(Attr.getLoc(), diag::warn_attribute_unknown_visibility) << TypeStr;
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new VisibilityAttr(type));
|
|
}
|
|
|
|
static void HandleObjCGCAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
if (!Attr.getParameterName()) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string)
|
|
<< "objc_gc" << 1;
|
|
return;
|
|
}
|
|
|
|
if (Attr.getNumArgs() != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
|
|
return;
|
|
}
|
|
|
|
|
|
ObjCGCAttr::GCAttrTypes type;
|
|
if (Attr.getParameterName()->isStr("weak")) {
|
|
if (isa<FieldDecl>(d) && !isa<ObjCIvarDecl>(d))
|
|
S.Diag(Attr.getLoc(), diag::warn_attribute_weak_on_field);
|
|
type = ObjCGCAttr::Weak;
|
|
}
|
|
else if (Attr.getParameterName()->isStr("strong"))
|
|
type = ObjCGCAttr::Strong;
|
|
else {
|
|
S.Diag(Attr.getLoc(), diag::warn_attribute_type_not_supported)
|
|
<< "objc_gc" << Attr.getParameterName();
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new ObjCGCAttr(type));
|
|
}
|
|
|
|
static void HandleBlocksAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
if (!Attr.getParameterName()) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string)
|
|
<< "blocks" << 1;
|
|
return;
|
|
}
|
|
|
|
if (Attr.getNumArgs() != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
|
|
return;
|
|
}
|
|
|
|
BlocksAttr::BlocksAttrTypes type;
|
|
if (Attr.getParameterName()->isStr("byref"))
|
|
type = BlocksAttr::ByRef;
|
|
else {
|
|
S.Diag(Attr.getLoc(), diag::warn_attribute_type_not_supported)
|
|
<< "blocks" << Attr.getParameterName();
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new BlocksAttr(type));
|
|
}
|
|
|
|
static void HandleSentinelAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() > 2) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments)
|
|
<< "0, 1 or 2";
|
|
return;
|
|
}
|
|
|
|
int sentinel = 0;
|
|
if (Attr.getNumArgs() > 0) {
|
|
Expr *E = static_cast<Expr *>(Attr.getArg(0));
|
|
llvm::APSInt Idx(32);
|
|
if (!E->isIntegerConstantExpr(Idx, S.Context)) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
|
|
<< "sentinel" << 1 << E->getSourceRange();
|
|
return;
|
|
}
|
|
sentinel = Idx.getZExtValue();
|
|
|
|
if (sentinel < 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_sentinel_less_than_zero)
|
|
<< E->getSourceRange();
|
|
return;
|
|
}
|
|
}
|
|
|
|
int nullPos = 0;
|
|
if (Attr.getNumArgs() > 1) {
|
|
Expr *E = static_cast<Expr *>(Attr.getArg(1));
|
|
llvm::APSInt Idx(32);
|
|
if (!E->isIntegerConstantExpr(Idx, S.Context)) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
|
|
<< "sentinel" << 2 << E->getSourceRange();
|
|
return;
|
|
}
|
|
nullPos = Idx.getZExtValue();
|
|
|
|
if (nullPos > 1 || nullPos < 0) {
|
|
// FIXME: This error message could be improved, it would be nice
|
|
// to say what the bounds actually are.
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_sentinel_not_zero_or_one)
|
|
<< E->getSourceRange();
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(d)) {
|
|
QualType FT = FD->getType();
|
|
if (!FT->getAsFunctionTypeProto()->isVariadic()) {
|
|
S.Diag(Attr.getLoc(), diag::warn_attribute_sentinel_not_variadic);
|
|
return;
|
|
}
|
|
} else if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(d)) {
|
|
if (!MD->isVariadic()) {
|
|
S.Diag(Attr.getLoc(), diag::warn_attribute_sentinel_not_variadic);
|
|
return;
|
|
}
|
|
} else {
|
|
S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
|
|
<< "sentinel" << "function or method";
|
|
return;
|
|
}
|
|
|
|
// FIXME: Actually create the attribute.
|
|
}
|
|
|
|
static void HandleWeakAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new WeakAttr());
|
|
}
|
|
|
|
static void HandleDLLImportAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new DLLImportAttr());
|
|
}
|
|
|
|
static void HandleDLLExportAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new DLLExportAttr());
|
|
}
|
|
|
|
static void HandleStdCallAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new StdCallAttr());
|
|
}
|
|
|
|
static void HandleFastCallAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new FastCallAttr());
|
|
}
|
|
|
|
static void HandleNothrowAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new NoThrowAttr());
|
|
}
|
|
|
|
static void HandleConstAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new ConstAttr());
|
|
}
|
|
|
|
static void HandlePureAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new PureAttr());
|
|
}
|
|
|
|
/// Handle __attribute__((format(type,idx,firstarg))) attributes
|
|
/// based on http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
|
|
static void HandleFormatAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
|
|
if (!Attr.getParameterName()) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string)
|
|
<< "format" << 1;
|
|
return;
|
|
}
|
|
|
|
if (Attr.getNumArgs() != 2) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 3;
|
|
return;
|
|
}
|
|
|
|
if (!isFunctionOrMethod(d) || !hasFunctionProto(d)) {
|
|
S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
|
|
<< "format" << "function";
|
|
return;
|
|
}
|
|
|
|
// FIXME: in C++ the implicit 'this' function parameter also counts.
|
|
// this is needed in order to be compatible with GCC
|
|
// the index must start in 1 and the limit is numargs+1
|
|
unsigned NumArgs = getFunctionOrMethodNumArgs(d);
|
|
unsigned FirstIdx = 1;
|
|
|
|
const char *Format = Attr.getParameterName()->getName();
|
|
unsigned FormatLen = Attr.getParameterName()->getLength();
|
|
|
|
// Normalize the argument, __foo__ becomes foo.
|
|
if (FormatLen > 4 && Format[0] == '_' && Format[1] == '_' &&
|
|
Format[FormatLen - 2] == '_' && Format[FormatLen - 1] == '_') {
|
|
Format += 2;
|
|
FormatLen -= 4;
|
|
}
|
|
|
|
bool Supported = false;
|
|
bool is_NSString = false;
|
|
bool is_strftime = false;
|
|
bool is_CFString = false;
|
|
|
|
switch (FormatLen) {
|
|
default: break;
|
|
case 5: Supported = !memcmp(Format, "scanf", 5); break;
|
|
case 6: Supported = !memcmp(Format, "printf", 6); break;
|
|
case 7: Supported = !memcmp(Format, "strfmon", 7); break;
|
|
case 8:
|
|
Supported = (is_strftime = !memcmp(Format, "strftime", 8)) ||
|
|
(is_NSString = !memcmp(Format, "NSString", 8)) ||
|
|
(is_CFString = !memcmp(Format, "CFString", 8));
|
|
break;
|
|
}
|
|
|
|
if (!Supported) {
|
|
S.Diag(Attr.getLoc(), diag::warn_attribute_type_not_supported)
|
|
<< "format" << Attr.getParameterName()->getName();
|
|
return;
|
|
}
|
|
|
|
// checks for the 2nd argument
|
|
Expr *IdxExpr = static_cast<Expr *>(Attr.getArg(0));
|
|
llvm::APSInt Idx(32);
|
|
if (!IdxExpr->isIntegerConstantExpr(Idx, S.Context)) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
|
|
<< "format" << 2 << IdxExpr->getSourceRange();
|
|
return;
|
|
}
|
|
|
|
if (Idx.getZExtValue() < FirstIdx || Idx.getZExtValue() > NumArgs) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds)
|
|
<< "format" << 2 << IdxExpr->getSourceRange();
|
|
return;
|
|
}
|
|
|
|
// FIXME: Do we need to bounds check?
|
|
unsigned ArgIdx = Idx.getZExtValue() - 1;
|
|
|
|
// make sure the format string is really a string
|
|
QualType Ty = getFunctionOrMethodArgType(d, ArgIdx);
|
|
|
|
if (is_CFString) {
|
|
if (!isCFStringType(Ty, S.Context)) {
|
|
S.Diag(Attr.getLoc(), diag::err_format_attribute_not)
|
|
<< "a CFString" << IdxExpr->getSourceRange();
|
|
return;
|
|
}
|
|
} else if (is_NSString) {
|
|
// FIXME: do we need to check if the type is NSString*? What are
|
|
// the semantics?
|
|
if (!isNSStringType(Ty, S.Context)) {
|
|
// FIXME: Should highlight the actual expression that has the
|
|
// wrong type.
|
|
S.Diag(Attr.getLoc(), diag::err_format_attribute_not)
|
|
<< "an NSString" << IdxExpr->getSourceRange();
|
|
return;
|
|
}
|
|
} else if (!Ty->isPointerType() ||
|
|
!Ty->getAsPointerType()->getPointeeType()->isCharType()) {
|
|
// FIXME: Should highlight the actual expression that has the
|
|
// wrong type.
|
|
S.Diag(Attr.getLoc(), diag::err_format_attribute_not)
|
|
<< "a string type" << IdxExpr->getSourceRange();
|
|
return;
|
|
}
|
|
|
|
// check the 3rd argument
|
|
Expr *FirstArgExpr = static_cast<Expr *>(Attr.getArg(1));
|
|
llvm::APSInt FirstArg(32);
|
|
if (!FirstArgExpr->isIntegerConstantExpr(FirstArg, S.Context)) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
|
|
<< "format" << 3 << FirstArgExpr->getSourceRange();
|
|
return;
|
|
}
|
|
|
|
// check if the function is variadic if the 3rd argument non-zero
|
|
if (FirstArg != 0) {
|
|
if (isFunctionOrMethodVariadic(d)) {
|
|
++NumArgs; // +1 for ...
|
|
} else {
|
|
S.Diag(d->getLocation(), diag::err_format_attribute_requires_variadic);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// strftime requires FirstArg to be 0 because it doesn't read from any
|
|
// variable the input is just the current time + the format string.
|
|
if (is_strftime) {
|
|
if (FirstArg != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_format_strftime_third_parameter)
|
|
<< FirstArgExpr->getSourceRange();
|
|
return;
|
|
}
|
|
// if 0 it disables parameter checking (to use with e.g. va_list)
|
|
} else if (FirstArg != 0 && FirstArg != NumArgs) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds)
|
|
<< "format" << 3 << FirstArgExpr->getSourceRange();
|
|
return;
|
|
}
|
|
|
|
d->addAttr(new FormatAttr(std::string(Format, FormatLen),
|
|
Idx.getZExtValue(), FirstArg.getZExtValue()));
|
|
}
|
|
|
|
static void HandleTransparentUnionAttr(Decl *d, const AttributeList &Attr,
|
|
Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
|
|
return;
|
|
}
|
|
|
|
// FIXME: This shouldn't be restricted to typedefs
|
|
TypedefDecl *TD = dyn_cast<TypedefDecl>(d);
|
|
if (!TD || !TD->getUnderlyingType()->isUnionType()) {
|
|
S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
|
|
<< "transparent_union" << "union";
|
|
return;
|
|
}
|
|
|
|
RecordDecl* RD = TD->getUnderlyingType()->getAsUnionType()->getDecl();
|
|
|
|
// FIXME: Should we do a check for RD->isDefinition()?
|
|
|
|
// FIXME: This isn't supposed to be restricted to pointers, but otherwise
|
|
// we might silently generate incorrect code; see following code
|
|
for (RecordDecl::field_iterator Field = RD->field_begin(),
|
|
FieldEnd = RD->field_end();
|
|
Field != FieldEnd; ++Field) {
|
|
if (!Field->getType()->isPointerType()) {
|
|
S.Diag(Attr.getLoc(), diag::warn_transparent_union_nonpointer);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// FIXME: This is a complete hack; we should be properly propagating
|
|
// transparent_union through Sema. That said, this is close enough to
|
|
// correctly compile all the common cases of transparent_union without
|
|
// errors or warnings
|
|
QualType NewTy = S.Context.VoidPtrTy;
|
|
NewTy.addConst();
|
|
TD->setUnderlyingType(NewTy);
|
|
}
|
|
|
|
static void HandleAnnotateAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() != 1) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
|
|
return;
|
|
}
|
|
Expr *argExpr = static_cast<Expr *>(Attr.getArg(0));
|
|
StringLiteral *SE = dyn_cast<StringLiteral>(argExpr);
|
|
|
|
// Make sure that there is a string literal as the annotation's single
|
|
// argument.
|
|
if (!SE) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_annotate_no_string);
|
|
return;
|
|
}
|
|
d->addAttr(new AnnotateAttr(std::string(SE->getStrData(),
|
|
SE->getByteLength())));
|
|
}
|
|
|
|
static void HandleAlignedAttr(Decl *d, const AttributeList &Attr, Sema &S) {
|
|
// check the attribute arguments.
|
|
if (Attr.getNumArgs() > 1) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1;
|
|
return;
|
|
}
|
|
|
|
unsigned Align = 0;
|
|
if (Attr.getNumArgs() == 0) {
|
|
// FIXME: This should be the target specific maximum alignment.
|
|
// (For now we just use 128 bits which is the maximum on X86.
|
|
Align = 128;
|
|
return;
|
|
}
|
|
|
|
Expr *alignmentExpr = static_cast<Expr *>(Attr.getArg(0));
|
|
llvm::APSInt Alignment(32);
|
|
if (!alignmentExpr->isIntegerConstantExpr(Alignment, S.Context)) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
|
|
<< "aligned" << alignmentExpr->getSourceRange();
|
|
return;
|
|
}
|
|
d->addAttr(new AlignedAttr(Alignment.getZExtValue() * 8));
|
|
}
|
|
|
|
/// HandleModeAttr - This attribute modifies the width of a decl with
|
|
/// primitive type.
|
|
///
|
|
/// Despite what would be logical, the mode attribute is a decl attribute,
|
|
/// not a type attribute: 'int ** __attribute((mode(HI))) *G;' tries to make
|
|
/// 'G' be HImode, not an intermediate pointer.
|
|
///
|
|
static void HandleModeAttr(Decl *D, const AttributeList &Attr, Sema &S) {
|
|
// This attribute isn't documented, but glibc uses it. It changes
|
|
// the width of an int or unsigned int to the specified size.
|
|
|
|
// Check that there aren't any arguments
|
|
if (Attr.getNumArgs() != 0) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 0;
|
|
return;
|
|
}
|
|
|
|
IdentifierInfo *Name = Attr.getParameterName();
|
|
if (!Name) {
|
|
S.Diag(Attr.getLoc(), diag::err_attribute_missing_parameter_name);
|
|
return;
|
|
}
|
|
const char *Str = Name->getName();
|
|
unsigned Len = Name->getLength();
|
|
|
|
// Normalize the attribute name, __foo__ becomes foo.
|
|
if (Len > 4 && Str[0] == '_' && Str[1] == '_' &&
|
|
Str[Len - 2] == '_' && Str[Len - 1] == '_') {
|
|
Str += 2;
|
|
Len -= 4;
|
|
}
|
|
|
|
unsigned DestWidth = 0;
|
|
bool IntegerMode = true;
|
|
switch (Len) {
|
|
case 2:
|
|
if (!memcmp(Str, "QI", 2)) { DestWidth = 8; break; }
|
|
if (!memcmp(Str, "HI", 2)) { DestWidth = 16; break; }
|
|
if (!memcmp(Str, "SI", 2)) { DestWidth = 32; break; }
|
|
if (!memcmp(Str, "DI", 2)) { DestWidth = 64; break; }
|
|
if (!memcmp(Str, "TI", 2)) { DestWidth = 128; break; }
|
|
if (!memcmp(Str, "SF", 2)) { DestWidth = 32; IntegerMode = false; break; }
|
|
if (!memcmp(Str, "DF", 2)) { DestWidth = 64; IntegerMode = false; break; }
|
|
if (!memcmp(Str, "XF", 2)) { DestWidth = 96; IntegerMode = false; break; }
|
|
if (!memcmp(Str, "TF", 2)) { DestWidth = 128; IntegerMode = false; break; }
|
|
break;
|
|
case 4:
|
|
// FIXME: glibc uses 'word' to define register_t; this is narrower than a
|
|
// pointer on PIC16 and other embedded platforms.
|
|
if (!memcmp(Str, "word", 4))
|
|
DestWidth = S.Context.Target.getPointerWidth(0);
|
|
if (!memcmp(Str, "byte", 4))
|
|
DestWidth = S.Context.Target.getCharWidth();
|
|
break;
|
|
case 7:
|
|
if (!memcmp(Str, "pointer", 7))
|
|
DestWidth = S.Context.Target.getPointerWidth(0);
|
|
break;
|
|
}
|
|
|
|
QualType OldTy;
|
|
if (TypedefDecl *TD = dyn_cast<TypedefDecl>(D))
|
|
OldTy = TD->getUnderlyingType();
|
|
else if (ValueDecl *VD = dyn_cast<ValueDecl>(D))
|
|
OldTy = VD->getType();
|
|
else {
|
|
S.Diag(D->getLocation(), diag::err_attr_wrong_decl)
|
|
<< "mode" << SourceRange(Attr.getLoc(), Attr.getLoc());
|
|
return;
|
|
}
|
|
|
|
// FIXME: Need proper fixed-width types
|
|
QualType NewTy;
|
|
switch (DestWidth) {
|
|
case 0:
|
|
S.Diag(Attr.getLoc(), diag::err_unknown_machine_mode) << Name;
|
|
return;
|
|
default:
|
|
S.Diag(Attr.getLoc(), diag::err_unsupported_machine_mode) << Name;
|
|
return;
|
|
case 8:
|
|
assert(IntegerMode);
|
|
if (OldTy->isSignedIntegerType())
|
|
NewTy = S.Context.SignedCharTy;
|
|
else
|
|
NewTy = S.Context.UnsignedCharTy;
|
|
break;
|
|
case 16:
|
|
assert(IntegerMode);
|
|
if (OldTy->isSignedIntegerType())
|
|
NewTy = S.Context.ShortTy;
|
|
else
|
|
NewTy = S.Context.UnsignedShortTy;
|
|
break;
|
|
case 32:
|
|
if (!IntegerMode)
|
|
NewTy = S.Context.FloatTy;
|
|
else if (OldTy->isSignedIntegerType())
|
|
NewTy = S.Context.IntTy;
|
|
else
|
|
NewTy = S.Context.UnsignedIntTy;
|
|
break;
|
|
case 64:
|
|
if (!IntegerMode)
|
|
NewTy = S.Context.DoubleTy;
|
|
else if (OldTy->isSignedIntegerType())
|
|
NewTy = S.Context.LongLongTy;
|
|
else
|
|
NewTy = S.Context.UnsignedLongLongTy;
|
|
break;
|
|
}
|
|
|
|
if (!OldTy->getAsBuiltinType())
|
|
S.Diag(Attr.getLoc(), diag::err_mode_not_primitive);
|
|
else if (!(IntegerMode && OldTy->isIntegerType()) &&
|
|
!(!IntegerMode && OldTy->isFloatingType())) {
|
|
S.Diag(Attr.getLoc(), diag::err_mode_wrong_type);
|
|
}
|
|
|
|
// Install the new type.
|
|
if (TypedefDecl *TD = dyn_cast<TypedefDecl>(D))
|
|
TD->setUnderlyingType(NewTy);
|
|
else
|
|
cast<ValueDecl>(D)->setType(NewTy);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Top Level Sema Entry Points
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// HandleDeclAttribute - Apply the specific attribute to the specified decl if
|
|
/// the attribute applies to decls. If the attribute is a type attribute, just
|
|
/// silently ignore it.
|
|
static void ProcessDeclAttribute(Decl *D, const AttributeList &Attr, Sema &S) {
|
|
switch (Attr.getKind()) {
|
|
case AttributeList::AT_IBOutlet: HandleIBOutletAttr (D, Attr, S); break;
|
|
case AttributeList::AT_address_space:
|
|
// Ignore this, this is a type attribute, handled by ProcessTypeAttributes.
|
|
break;
|
|
case AttributeList::AT_alias: HandleAliasAttr (D, Attr, S); break;
|
|
case AttributeList::AT_aligned: HandleAlignedAttr (D, Attr, S); break;
|
|
case AttributeList::AT_always_inline:
|
|
HandleAlwaysInlineAttr (D, Attr, S); break;
|
|
case AttributeList::AT_annotate: HandleAnnotateAttr (D, Attr, S); break;
|
|
case AttributeList::AT_constructor: HandleConstructorAttr(D, Attr, S); break;
|
|
case AttributeList::AT_deprecated: HandleDeprecatedAttr(D, Attr, S); break;
|
|
case AttributeList::AT_destructor: HandleDestructorAttr(D, Attr, S); break;
|
|
case AttributeList::AT_dllexport: HandleDLLExportAttr (D, Attr, S); break;
|
|
case AttributeList::AT_dllimport: HandleDLLImportAttr (D, Attr, S); break;
|
|
case AttributeList::AT_ext_vector_type:
|
|
HandleExtVectorTypeAttr(D, Attr, S);
|
|
break;
|
|
case AttributeList::AT_fastcall: HandleFastCallAttr (D, Attr, S); break;
|
|
case AttributeList::AT_format: HandleFormatAttr (D, Attr, S); break;
|
|
case AttributeList::AT_mode: HandleModeAttr (D, Attr, S); break;
|
|
case AttributeList::AT_nonnull: HandleNonNullAttr (D, Attr, S); break;
|
|
case AttributeList::AT_noreturn: HandleNoReturnAttr (D, Attr, S); break;
|
|
case AttributeList::AT_nothrow: HandleNothrowAttr (D, Attr, S); break;
|
|
case AttributeList::AT_packed: HandlePackedAttr (D, Attr, S); break;
|
|
case AttributeList::AT_stdcall: HandleStdCallAttr (D, Attr, S); break;
|
|
case AttributeList::AT_unavailable: HandleUnavailableAttr(D, Attr, S); break;
|
|
case AttributeList::AT_unused: HandleUnusedAttr (D, Attr, S); break;
|
|
case AttributeList::AT_vector_size: HandleVectorSizeAttr(D, Attr, S); break;
|
|
case AttributeList::AT_visibility: HandleVisibilityAttr(D, Attr, S); break;
|
|
case AttributeList::AT_weak: HandleWeakAttr (D, Attr, S); break;
|
|
case AttributeList::AT_transparent_union:
|
|
HandleTransparentUnionAttr(D, Attr, S);
|
|
break;
|
|
case AttributeList::AT_objc_gc: HandleObjCGCAttr (D, Attr, S); break;
|
|
case AttributeList::AT_blocks: HandleBlocksAttr (D, Attr, S); break;
|
|
case AttributeList::AT_sentinel: HandleSentinelAttr (D, Attr, S); break;
|
|
case AttributeList::AT_const: HandleConstAttr (D, Attr, S); break;
|
|
case AttributeList::AT_pure: HandlePureAttr (D, Attr, S); break;
|
|
default:
|
|
#if 0
|
|
// TODO: when we have the full set of attributes, warn about unknown ones.
|
|
S.Diag(Attr->getLoc(), diag::warn_attribute_ignored) << Attr->getName();
|
|
#endif
|
|
break;
|
|
}
|
|
}
|
|
|
|
/// ProcessDeclAttributeList - Apply all the decl attributes in the specified
|
|
/// attribute list to the specified decl, ignoring any type attributes.
|
|
void Sema::ProcessDeclAttributeList(Decl *D, const AttributeList *AttrList) {
|
|
while (AttrList) {
|
|
ProcessDeclAttribute(D, *AttrList, *this);
|
|
AttrList = AttrList->getNext();
|
|
}
|
|
}
|
|
|
|
|
|
/// ProcessDeclAttributes - Given a declarator (PD) with attributes indicated in
|
|
/// it, apply them to D. This is a bit tricky because PD can have attributes
|
|
/// specified in many different places, and we need to find and apply them all.
|
|
void Sema::ProcessDeclAttributes(Decl *D, const Declarator &PD) {
|
|
// Apply decl attributes from the DeclSpec if present.
|
|
if (const AttributeList *Attrs = PD.getDeclSpec().getAttributes())
|
|
ProcessDeclAttributeList(D, Attrs);
|
|
|
|
// Walk the declarator structure, applying decl attributes that were in a type
|
|
// position to the decl itself. This handles cases like:
|
|
// int *__attr__(x)** D;
|
|
// when X is a decl attribute.
|
|
for (unsigned i = 0, e = PD.getNumTypeObjects(); i != e; ++i)
|
|
if (const AttributeList *Attrs = PD.getTypeObject(i).getAttrs())
|
|
ProcessDeclAttributeList(D, Attrs);
|
|
|
|
// Finally, apply any attributes on the decl itself.
|
|
if (const AttributeList *Attrs = PD.getAttributes())
|
|
ProcessDeclAttributeList(D, Attrs);
|
|
}
|
|
|