move decl attribute processing to a new SemaDeclAttr.cpp.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@52792 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp
new file mode 100644
index 0000000..8d715f1
--- /dev/null
+++ b/lib/Sema/SemaDeclAttr.cpp
@@ -0,0 +1,655 @@
+//===--- SemaDeclAttr.cpp - Declaration Attribute Handling ----------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements decl-related attribute processing.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Sema.h"
+#include "clang/AST/ASTContext.h"
+
+using namespace clang;
+
+static const FunctionTypeProto *getFunctionProto(Decl *d) {
+ QualType Ty;
+
+ if (ValueDecl *decl = dyn_cast<ValueDecl>(d))
+ Ty = decl->getType();
+ else if (FieldDecl *decl = dyn_cast<FieldDecl>(d))
+ Ty = decl->getType();
+ else if (TypedefDecl* decl = dyn_cast<TypedefDecl>(d))
+ Ty = decl->getUnderlyingType();
+ else
+ return 0;
+
+ if (Ty->isFunctionPointerType())
+ Ty = Ty->getAsPointerType()->getPointeeType();
+
+ if (const FunctionType *FnTy = Ty->getAsFunctionType())
+ return dyn_cast<FunctionTypeProto>(FnTy->getAsFunctionType());
+
+ return 0;
+}
+
+static inline bool isNSStringType(QualType T, ASTContext &Ctx) {
+ if (!T->isPointerType())
+ return false;
+
+ T = T->getAsPointerType()->getPointeeType().getCanonicalType();
+ ObjCInterfaceType* ClsT = dyn_cast<ObjCInterfaceType>(T.getTypePtr());
+
+ if (!ClsT)
+ return false;
+
+ IdentifierInfo* ClsName = ClsT->getDecl()->getIdentifier();
+
+ // FIXME: Should we walk the chain of classes?
+ return ClsName == &Ctx.Idents.get("NSString") ||
+ ClsName == &Ctx.Idents.get("NSMutableString");
+}
+
+void Sema::HandleDeclAttribute(Decl *New, const AttributeList *Attr) {
+
+ switch (Attr->getKind()) {
+ case AttributeList::AT_vector_size:
+ if (ValueDecl *vDecl = dyn_cast<ValueDecl>(New)) {
+ QualType newType = HandleVectorTypeAttribute(vDecl->getType(), Attr);
+ if (!newType.isNull()) // install the new vector type into the decl
+ vDecl->setType(newType);
+ }
+ if (TypedefDecl *tDecl = dyn_cast<TypedefDecl>(New)) {
+ QualType newType = HandleVectorTypeAttribute(tDecl->getUnderlyingType(),
+ Attr);
+ if (!newType.isNull()) // install the new vector type into the decl
+ tDecl->setUnderlyingType(newType);
+ }
+ break;
+ case AttributeList::AT_ext_vector_type:
+ if (TypedefDecl *tDecl = dyn_cast<TypedefDecl>(New))
+ HandleExtVectorTypeAttribute(tDecl, Attr);
+ else
+ Diag(Attr->getLoc(),
+ diag::err_typecheck_ext_vector_not_typedef);
+ break;
+ case AttributeList::AT_address_space:
+ // Ignore this, this is a type attribute, handled by ProcessTypeAttributes.
+ break;
+ case AttributeList::AT_mode:
+ // 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.
+ if (TypedefDecl *tDecl = dyn_cast<TypedefDecl>(New)) {
+ QualType newType = HandleModeTypeAttribute(tDecl->getUnderlyingType(),
+ Attr);
+ tDecl->setUnderlyingType(newType);
+ } else if (ValueDecl *vDecl = dyn_cast<ValueDecl>(New)) {
+ QualType newType = HandleModeTypeAttribute(vDecl->getType(), Attr);
+ vDecl->setType(newType);
+ }
+ // FIXME: Diagnostic?
+ break;
+ case AttributeList::AT_alias: HandleAliasAttribute(New, Attr); break;
+ case AttributeList::AT_deprecated: HandleDeprecatedAttribute(New, Attr);break;
+ case AttributeList::AT_visibility: HandleVisibilityAttribute(New, Attr);break;
+ case AttributeList::AT_weak: HandleWeakAttribute(New, Attr); break;
+ case AttributeList::AT_dllimport: HandleDLLImportAttribute(New, Attr); break;
+ case AttributeList::AT_dllexport: HandleDLLExportAttribute(New, Attr); break;
+ case AttributeList::AT_nothrow: HandleNothrowAttribute(New, Attr); break;
+ case AttributeList::AT_stdcall: HandleStdCallAttribute(New, Attr); break;
+ case AttributeList::AT_fastcall: HandleFastCallAttribute(New, Attr); break;
+ case AttributeList::AT_aligned: HandleAlignedAttribute(New, Attr); break;
+ case AttributeList::AT_packed: HandlePackedAttribute(New, Attr); break;
+ case AttributeList::AT_annotate: HandleAnnotateAttribute(New, Attr); break;
+ case AttributeList::AT_noreturn: HandleNoReturnAttribute(New, Attr); break;
+ case AttributeList::AT_format: HandleFormatAttribute(New, Attr); break;
+ case AttributeList::AT_transparent_union:
+ HandleTransparentUnionAttribute(New, Attr);
+ break;
+ default:
+#if 0
+ // TODO: when we have the full set of attributes, warn about unknown ones.
+ Diag(Attr->getLoc(), diag::warn_attribute_ignored,
+ Attr->getName()->getName());
+#endif
+ break;
+ }
+}
+
+void Sema::HandleDeclAttributes(Decl *New, const AttributeList *DeclSpecAttrs,
+ const AttributeList *DeclaratorAttrs) {
+ if (DeclSpecAttrs == 0 && DeclaratorAttrs == 0) return;
+
+ while (DeclSpecAttrs) {
+ HandleDeclAttribute(New, DeclSpecAttrs);
+ DeclSpecAttrs = DeclSpecAttrs->getNext();
+ }
+
+ // If there are any type attributes that were in the declarator, apply them to
+ // its top level type.
+ if (ValueDecl *VD = dyn_cast<ValueDecl>(New)) {
+ QualType DT = VD->getType();
+ ProcessTypeAttributes(DT, DeclaratorAttrs);
+ VD->setType(DT);
+ } else if (TypedefDecl *TD = dyn_cast<TypedefDecl>(New)) {
+ QualType DT = TD->getUnderlyingType();
+ ProcessTypeAttributes(DT, DeclaratorAttrs);
+ TD->setUnderlyingType(DT);
+ }
+
+ while (DeclaratorAttrs) {
+ HandleDeclAttribute(New, DeclaratorAttrs);
+ DeclaratorAttrs = DeclaratorAttrs->getNext();
+ }
+}
+
+void Sema::HandleExtVectorTypeAttribute(TypedefDecl *tDecl,
+ const AttributeList *rawAttr) {
+ QualType curType = tDecl->getUnderlyingType();
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() != 1) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("1"));
+ return;
+ }
+ Expr *sizeExpr = static_cast<Expr *>(rawAttr->getArg(0));
+ llvm::APSInt vecSize(32);
+ if (!sizeExpr->isIntegerConstantExpr(vecSize, Context)) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_argument_not_int,
+ "ext_vector_type", sizeExpr->getSourceRange());
+ return;
+ }
+ // unlike gcc's vector_size attribute, we do not allow vectors to be defined
+ // in conjunction with complex types (pointers, arrays, functions, etc.).
+ Type *canonType = curType.getCanonicalType().getTypePtr();
+ if (!(canonType->isIntegerType() || canonType->isRealFloatingType())) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_invalid_vector_type,
+ curType.getCanonicalType().getAsString());
+ return;
+ }
+ // unlike gcc's vector_size attribute, the size is specified as the
+ // number of elements, not the number of bytes.
+ unsigned vectorSize = static_cast<unsigned>(vecSize.getZExtValue());
+
+ if (vectorSize == 0) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_zero_size,
+ sizeExpr->getSourceRange());
+ return;
+ }
+ // Instantiate/Install the vector type, the number of elements is > 0.
+ tDecl->setUnderlyingType(Context.getExtVectorType(curType, vectorSize));
+ // Remember this typedef decl, we will need it later for diagnostics.
+ ExtVectorDecls.push_back(tDecl);
+}
+
+QualType Sema::HandleVectorTypeAttribute(QualType curType,
+ const AttributeList *rawAttr) {
+ // check the attribute arugments.
+ if (rawAttr->getNumArgs() != 1) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("1"));
+ return QualType();
+ }
+ Expr *sizeExpr = static_cast<Expr *>(rawAttr->getArg(0));
+ llvm::APSInt vecSize(32);
+ if (!sizeExpr->isIntegerConstantExpr(vecSize, Context)) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_argument_not_int,
+ "vector_size", sizeExpr->getSourceRange());
+ return QualType();
+ }
+ // navigate to the base type - we need to provide for vector pointers,
+ // vector arrays, and functions returning vectors.
+ Type *canonType = curType.getCanonicalType().getTypePtr();
+
+ if (canonType->isPointerType() || canonType->isArrayType() ||
+ canonType->isFunctionType()) {
+ assert(0 && "HandleVector(): Complex type construction unimplemented");
+ /* FIXME: rebuild the type from the inside out, vectorizing the inner type.
+ do {
+ if (PointerType *PT = dyn_cast<PointerType>(canonType))
+ canonType = PT->getPointeeType().getTypePtr();
+ else if (ArrayType *AT = dyn_cast<ArrayType>(canonType))
+ canonType = AT->getElementType().getTypePtr();
+ else if (FunctionType *FT = dyn_cast<FunctionType>(canonType))
+ canonType = FT->getResultType().getTypePtr();
+ } while (canonType->isPointerType() || canonType->isArrayType() ||
+ canonType->isFunctionType());
+ */
+ }
+ // the base type must be integer or float.
+ if (!(canonType->isIntegerType() || canonType->isRealFloatingType())) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_invalid_vector_type,
+ curType.getCanonicalType().getAsString());
+ return QualType();
+ }
+ unsigned typeSize = static_cast<unsigned>(Context.getTypeSize(curType));
+ // vecSize is specified in bytes - convert to bits.
+ unsigned vectorSize = static_cast<unsigned>(vecSize.getZExtValue() * 8);
+
+ // the vector size needs to be an integral multiple of the type size.
+ if (vectorSize % typeSize) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_invalid_size,
+ sizeExpr->getSourceRange());
+ return QualType();
+ }
+ if (vectorSize == 0) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_zero_size,
+ sizeExpr->getSourceRange());
+ return QualType();
+ }
+ // Instantiate the vector type, the number of elements is > 0, and not
+ // required to be a power of 2, unlike GCC.
+ return Context.getVectorType(curType, vectorSize/typeSize);
+}
+
+void Sema::HandlePackedAttribute(Decl *d, const AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() > 0) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("0"));
+ return;
+ }
+
+ if (TagDecl *TD = dyn_cast<TagDecl>(d))
+ TD->addAttr(new PackedAttr);
+ else if (FieldDecl *FD = dyn_cast<FieldDecl>(d)) {
+ // If the alignment is less than or equal to 8 bits, the packed attribute
+ // has no effect.
+ if (!FD->getType()->isIncompleteType() &&
+ Context.getTypeAlign(FD->getType()) <= 8)
+ Diag(rawAttr->getLoc(),
+ diag::warn_attribute_ignored_for_field_of_type,
+ rawAttr->getName()->getName(), FD->getType().getAsString());
+ else
+ FD->addAttr(new PackedAttr);
+ } else
+ Diag(rawAttr->getLoc(), diag::warn_attribute_ignored,
+ rawAttr->getName()->getName());
+}
+
+void Sema::HandleAliasAttribute(Decl *d, const AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() != 1) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("1"));
+ return;
+ }
+
+ Expr *Arg = static_cast<Expr*>(rawAttr->getArg(0));
+ Arg = Arg->IgnoreParenCasts();
+ StringLiteral *Str = dyn_cast<StringLiteral>(Arg);
+
+ if (Str == 0 || Str->isWide()) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_argument_n_not_string,
+ "alias", std::string("1"));
+ return;
+ }
+
+ const char *Alias = Str->getStrData();
+ unsigned AliasLen = Str->getByteLength();
+
+ // FIXME: check if target symbol exists in current file
+
+ d->addAttr(new AliasAttr(std::string(Alias, AliasLen)));
+}
+
+void Sema::HandleNoReturnAttribute(Decl *d, const AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() != 0) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("0"));
+ return;
+ }
+
+ FunctionDecl *Fn = dyn_cast<FunctionDecl>(d);
+
+ if (!Fn) {
+ Diag(rawAttr->getLoc(), diag::warn_attribute_wrong_decl_type,
+ "noreturn", "function");
+ return;
+ }
+
+ d->addAttr(new NoReturnAttr());
+}
+
+void Sema::HandleDeprecatedAttribute(Decl *d, const AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() != 0) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("0"));
+ return;
+ }
+
+ d->addAttr(new DeprecatedAttr());
+}
+
+void Sema::HandleVisibilityAttribute(Decl *d, const AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() != 1) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("1"));
+ return;
+ }
+
+ Expr *Arg = static_cast<Expr*>(rawAttr->getArg(0));
+ Arg = Arg->IgnoreParenCasts();
+ StringLiteral *Str = dyn_cast<StringLiteral>(Arg);
+
+ if (Str == 0 || Str->isWide()) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_argument_n_not_string,
+ "visibility", std::string("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 {
+ Diag(rawAttr->getLoc(), diag::warn_attribute_type_not_supported,
+ "visibility", TypeStr);
+ return;
+ }
+
+ d->addAttr(new VisibilityAttr(type));
+}
+
+void Sema::HandleWeakAttribute(Decl *d, const AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() != 0) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("0"));
+ return;
+ }
+
+ d->addAttr(new WeakAttr());
+}
+
+void Sema::HandleDLLImportAttribute(Decl *d, const AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() != 0) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("0"));
+ return;
+ }
+
+ d->addAttr(new DLLImportAttr());
+}
+
+void Sema::HandleDLLExportAttribute(Decl *d, const AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() != 0) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("0"));
+ return;
+ }
+
+ d->addAttr(new DLLExportAttr());
+}
+
+void Sema::HandleStdCallAttribute(Decl *d, const AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() != 0) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("0"));
+ return;
+ }
+
+ d->addAttr(new StdCallAttr());
+}
+
+void Sema::HandleFastCallAttribute(Decl *d, const AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() != 0) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("0"));
+ return;
+ }
+
+ d->addAttr(new FastCallAttr());
+}
+
+void Sema::HandleNothrowAttribute(Decl *d, const AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() != 0) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("0"));
+ return;
+ }
+
+ d->addAttr(new NoThrowAttr());
+}
+
+/// Handle __attribute__((format(type,idx,firstarg))) attributes
+/// based on http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
+void Sema::HandleFormatAttribute(Decl *d, const AttributeList *rawAttr) {
+
+ if (!rawAttr->getParameterName()) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_argument_n_not_string,
+ "format", std::string("1"));
+ return;
+ }
+
+ if (rawAttr->getNumArgs() != 2) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("3"));
+ return;
+ }
+
+ // GCC ignores the format attribute on K&R style function
+ // prototypes, so we ignore it as well
+ const FunctionTypeProto *proto = getFunctionProto(d);
+
+ if (!proto) {
+ Diag(rawAttr->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 = proto->getNumArgs();
+ unsigned FirstIdx = 1;
+
+ const char *Format = rawAttr->getParameterName()->getName();
+ unsigned FormatLen = rawAttr->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;
+
+ 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));
+ break;
+ }
+
+ if (!Supported) {
+ Diag(rawAttr->getLoc(), diag::warn_attribute_type_not_supported,
+ "format", rawAttr->getParameterName()->getName());
+ return;
+ }
+
+ // checks for the 2nd argument
+ Expr *IdxExpr = static_cast<Expr *>(rawAttr->getArg(0));
+ llvm::APSInt Idx(Context.getTypeSize(IdxExpr->getType()));
+ if (!IdxExpr->isIntegerConstantExpr(Idx, Context)) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_argument_n_not_int,
+ "format", std::string("2"), IdxExpr->getSourceRange());
+ return;
+ }
+
+ if (Idx.getZExtValue() < FirstIdx || Idx.getZExtValue() > NumArgs) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_argument_out_of_bounds,
+ "format", std::string("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 = proto->getArgType(ArgIdx);
+
+ if (is_NSString) {
+ // FIXME: do we need to check if the type is NSString*? What are
+ // the semantics?
+ if (!isNSStringType(Ty, Context)) {
+ // FIXME: Should highlight the actual expression that has the
+ // wrong type.
+ Diag(rawAttr->getLoc(), diag::err_format_attribute_not_NSString,
+ IdxExpr->getSourceRange());
+ return;
+ }
+ } else if (!Ty->isPointerType() ||
+ !Ty->getAsPointerType()->getPointeeType()->isCharType()) {
+ // FIXME: Should highlight the actual expression that has the
+ // wrong type.
+ Diag(rawAttr->getLoc(), diag::err_format_attribute_not_string,
+ IdxExpr->getSourceRange());
+ return;
+ }
+
+ // check the 3rd argument
+ Expr *FirstArgExpr = static_cast<Expr *>(rawAttr->getArg(1));
+ llvm::APSInt FirstArg(Context.getTypeSize(FirstArgExpr->getType()));
+ if (!FirstArgExpr->isIntegerConstantExpr(FirstArg, Context)) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_argument_n_not_int,
+ "format", std::string("3"), FirstArgExpr->getSourceRange());
+ return;
+ }
+
+ // check if the function is variadic if the 3rd argument non-zero
+ if (FirstArg != 0) {
+ if (proto->isVariadic()) {
+ ++NumArgs; // +1 for ...
+ } else {
+ 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) {
+ Diag(rawAttr->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) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_argument_out_of_bounds,
+ "format", std::string("3"), FirstArgExpr->getSourceRange());
+ return;
+ }
+
+ d->addAttr(new FormatAttr(std::string(Format, FormatLen),
+ Idx.getZExtValue(), FirstArg.getZExtValue()));
+}
+
+void Sema::HandleTransparentUnionAttribute(Decl *d,
+ const AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() != 0) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("0"));
+ return;
+ }
+
+ TypeDecl *decl = dyn_cast<TypeDecl>(d);
+
+ if (!decl || !Context.getTypeDeclType(decl)->isUnionType()) {
+ Diag(rawAttr->getLoc(), diag::warn_attribute_wrong_decl_type,
+ "transparent_union", "union");
+ return;
+ }
+
+ //QualType QTy = Context.getTypeDeclType(decl);
+ //const RecordType *Ty = QTy->getAsUnionType();
+
+// FIXME
+// Ty->addAttr(new TransparentUnionAttr());
+}
+
+void Sema::HandleAnnotateAttribute(Decl *d, const AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() != 1) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("1"));
+ return;
+ }
+ Expr *argExpr = static_cast<Expr *>(rawAttr->getArg(0));
+ StringLiteral *SE = dyn_cast<StringLiteral>(argExpr);
+
+ // Make sure that there is a string literal as the annotation's single
+ // argument.
+ if (!SE) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_annotate_no_string);
+ return;
+ }
+ d->addAttr(new AnnotateAttr(std::string(SE->getStrData(),
+ SE->getByteLength())));
+}
+
+void Sema::HandleAlignedAttribute(Decl *d, const AttributeList *rawAttr) {
+ // check the attribute arguments.
+ if (rawAttr->getNumArgs() > 1) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_wrong_number_arguments,
+ std::string("1"));
+ return;
+ }
+
+ unsigned Align = 0;
+
+ if (rawAttr->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;
+ } else {
+ Expr *alignmentExpr = static_cast<Expr *>(rawAttr->getArg(0));
+ llvm::APSInt alignment(32);
+ if (!alignmentExpr->isIntegerConstantExpr(alignment, Context)) {
+ Diag(rawAttr->getLoc(), diag::err_attribute_argument_not_int,
+ "aligned", alignmentExpr->getSourceRange());
+ return;
+ }
+
+ Align = alignment.getZExtValue() * 8;
+ }
+
+ d->addAttr(new AlignedAttr(Align));
+}