From fca0ddd42965e0b7ae821213486d4e0dd71fb439 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Thu, 26 Jun 2008 06:27:57 +0000 Subject: [PATCH] fix a bug handling type attributes in the declspec. declspec processing used to mutate the attribute list for declspecs when the type was converted, breaking the case where one declspec was shared by multiple declarators. This fixes rdar://6032532. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@52769 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Sema/Sema.h | 6 ++--- lib/Sema/SemaDecl.cpp | 27 +++++++++++++--------- lib/Sema/SemaType.cpp | 45 +++++++++++------------------------- test/CodeGen/address-space.c | 13 ++++++++++- 4 files changed, 44 insertions(+), 47 deletions(-) diff --git a/lib/Sema/Sema.h b/lib/Sema/Sema.h index 89d0d4011f..278c8415d6 100644 --- a/lib/Sema/Sema.h +++ b/lib/Sema/Sema.h @@ -198,8 +198,8 @@ public: //===--------------------------------------------------------------------===// // Type Analysis / Processing: SemaType.cpp. // - QualType ConvertDeclSpecToType(DeclSpec &DS); - AttributeList *ProcessTypeAttributes(QualType &Result, AttributeList *AL); + QualType ConvertDeclSpecToType(const DeclSpec &DS); + void ProcessTypeAttributes(QualType &Result, const AttributeList *AL); QualType GetTypeForDeclarator(Declarator &D, Scope *S); @@ -305,7 +305,7 @@ private: /// The raw attribute contains 1 argument, the id of the address space /// for the type. QualType HandleAddressSpaceTypeAttribute(QualType curType, - AttributeList *rawAttr); + const AttributeList *rawAttr); /// HandleModeTypeAttribute - this attribute modifies the width of a /// primitive type. Note that this is a variable attribute, and not diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp index c2874106f4..cdcdebae81 100644 --- a/lib/Sema/SemaDecl.cpp +++ b/lib/Sema/SemaDecl.cpp @@ -2350,17 +2350,7 @@ void Sema::HandleDeclAttribute(Decl *New, AttributeList *Attr) { diag::err_typecheck_ext_vector_not_typedef); break; case AttributeList::AT_address_space: - if (TypedefDecl *tDecl = dyn_cast(New)) { - QualType newType = HandleAddressSpaceTypeAttribute( - tDecl->getUnderlyingType(), - Attr); - tDecl->setUnderlyingType(newType); - } else if (ValueDecl *vDecl = dyn_cast(New)) { - QualType newType = HandleAddressSpaceTypeAttribute(vDecl->getType(), - Attr); - // install the new addr spaced type into the decl - vDecl->setType(newType); - } + // Ignore this, this is a type attribute, handled by ProcessTypeAttributes. break; case AttributeList::AT_mode: if (TypedefDecl *tDecl = dyn_cast(New)) { @@ -2430,10 +2420,25 @@ void Sema::HandleDeclAttribute(Decl *New, AttributeList *Attr) { void Sema::HandleDeclAttributes(Decl *New, AttributeList *declspec_prefix, AttributeList *declarator_postfix) { + if (declspec_prefix == 0 && declarator_postfix == 0) return; + while (declspec_prefix) { HandleDeclAttribute(New, declspec_prefix); declspec_prefix = declspec_prefix->getNext(); } + + // If there are any type attributes that were in the declarator, apply them to + // its top level type. + if (ValueDecl *VD = dyn_cast(New)) { + QualType DT = VD->getType(); + ProcessTypeAttributes(DT, declarator_postfix); + VD->setType(DT); + } else if (TypedefDecl *TD = dyn_cast(New)) { + QualType DT = TD->getUnderlyingType(); + ProcessTypeAttributes(DT, declarator_postfix); + TD->setUnderlyingType(DT); + } + while (declarator_postfix) { HandleDeclAttribute(New, declarator_postfix); declarator_postfix = declarator_postfix->getNext(); diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp index d66b41d8e3..b8e20e45be 100644 --- a/lib/Sema/SemaType.cpp +++ b/lib/Sema/SemaType.cpp @@ -21,7 +21,7 @@ using namespace clang; /// ConvertDeclSpecToType - Convert the specified declspec to the appropriate /// type object. This returns null on error. -QualType Sema::ConvertDeclSpecToType(DeclSpec &DS) { +QualType Sema::ConvertDeclSpecToType(const DeclSpec &DS) { // FIXME: Should move the logic from DeclSpec::Finish to here for validity // checking. QualType Result; @@ -168,8 +168,8 @@ QualType Sema::ConvertDeclSpecToType(DeclSpec &DS) { // See if there are any attributes on the declspec that apply to the type (as // opposed to the decl). - if (AttributeList *AL = DS.getAttributes()) - DS.SetAttributes(ProcessTypeAttributes(Result, AL)); + if (const AttributeList *AL = DS.getAttributes()) + ProcessTypeAttributes(Result, AL); // Apply const/volatile/restrict qualifiers to T. if (unsigned TypeQuals = DS.getTypeQualifiers()) { @@ -258,8 +258,8 @@ QualType Sema::GetTypeForDeclarator(Declarator &D, Scope *S) { T = Context.getPointerType(T).getQualifiedType(DeclType.Ptr.TypeQuals); // See if there are any attributes on the pointer that apply to it. - if (AttributeList *AL = DeclType.Ptr.AttrList) - DeclType.Ptr.AttrList = ProcessTypeAttributes(T, AL); + if (const AttributeList *AL = DeclType.Ptr.AttrList) + ProcessTypeAttributes(T, AL); break; case DeclaratorChunk::Reference: @@ -288,8 +288,8 @@ QualType Sema::GetTypeForDeclarator(Declarator &D, Scope *S) { T.addRestrict(); // See if there are any attributes on the pointer that apply to it. - if (AttributeList *AL = DeclType.Ref.AttrList) - DeclType.Ref.AttrList = ProcessTypeAttributes(T, AL); + if (const AttributeList *AL = DeclType.Ref.AttrList) + ProcessTypeAttributes(T, AL); break; case DeclaratorChunk::Array: { DeclaratorChunk::ArrayTypeInfo &ATI = DeclType.Arr; @@ -513,46 +513,27 @@ Sema::TypeResult Sema::ActOnTypeName(Scope *S, Declarator &D) { return T.getAsOpaquePtr(); } -AttributeList *Sema::ProcessTypeAttributes(QualType &Result, AttributeList *AL){ +void Sema::ProcessTypeAttributes(QualType &Result, const AttributeList *AL) { // Scan through and apply attributes to this type where it makes sense. Some // attributes (such as __address_space__, __vector_size__, etc) apply to the // type, but others can be present in the type specifiers even though they - // apply to the decl. Here we apply and delete attributes that apply to the - // type and leave the others alone. - llvm::SmallVector LeftOverAttrs; - while (AL) { - // Unlink this attribute from the chain, so we can process it independently. - AttributeList *ThisAttr = AL; - AL = AL->getNext(); - ThisAttr->setNext(0); - + // apply to the decl. Here we apply type attributes and ignore the rest. + for (; AL; AL = AL->getNext()) { // If this is an attribute we can handle, do so now, otherwise, add it to // the LeftOverAttrs list for rechaining. - switch (ThisAttr->getKind()) { + switch (AL->getKind()) { default: break; case AttributeList::AT_address_space: - Result = HandleAddressSpaceTypeAttribute(Result, ThisAttr); - delete ThisAttr; // Consume the attribute. + Result = HandleAddressSpaceTypeAttribute(Result, AL); continue; } - - LeftOverAttrs.push_back(ThisAttr); } - - // Rechain any attributes that haven't been deleted to the DeclSpec. - AttributeList *List = 0; - for (unsigned i = 0, e = LeftOverAttrs.size(); i != e; ++i) { - LeftOverAttrs[i]->setNext(List); - List = LeftOverAttrs[i]; - } - - return List; } /// HandleAddressSpaceTypeAttribute - Process an address_space attribute on the /// specified type. QualType Sema::HandleAddressSpaceTypeAttribute(QualType Type, - AttributeList *Attr) { + const AttributeList *Attr) { // If this type is already address space qualified, reject it. // Clause 6.7.3 - Type qualifiers: "No type shall be qualified by qualifiers // for two or more different address spaces." diff --git a/test/CodeGen/address-space.c b/test/CodeGen/address-space.c index 1c295a2457..0edad303ed 100644 --- a/test/CodeGen/address-space.c +++ b/test/CodeGen/address-space.c @@ -1,9 +1,20 @@ // RUN: clang -emit-llvm < %s 2>&1 | grep '@foo.*global.*addrspace(1)' && // RUN: clang -emit-llvm < %s 2>&1 | grep '@ban.*global.*addrspace(1)' && -// RUN: clang -emit-llvm < %s 2>&1 | grep 'load.*addrspace(1)' | count 2 +// RUN: clang -emit-llvm < %s 2>&1 | grep 'load.*addrspace(1)' | count 2 && +// RUN: clang -emit-llvm < %s 2>&1 | grep 'load.*addrspace(2).. @A' && +// RUN: clang -emit-llvm < %s 2>&1 | grep 'load.*addrspace(2).. @B' + int foo __attribute__((address_space(1))); int ban[10] __attribute__((address_space(1))); int bar() { return foo; } int baz(int i) { return ban[i]; } + +// Both A and B point into addrspace(2). +__attribute__((address_space(2))) int *A, *B; + +void test3() { + *A = *B; +} +