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-rw-r--r--clang/lib/Sema/TargetAttributesSema.cpp278
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diff --git a/clang/lib/Sema/TargetAttributesSema.cpp b/clang/lib/Sema/TargetAttributesSema.cpp
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+++ b/clang/lib/Sema/TargetAttributesSema.cpp
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+//===-- TargetAttributesSema.cpp - Encapsulate target attributes-*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains semantic analysis implementation for target-specific
+// attributes.
+//
+//===----------------------------------------------------------------------===//
+
+#include "TargetAttributesSema.h"
+#include "clang/Sema/SemaInternal.h"
+#include "clang/Basic/TargetInfo.h"
+#include "clang/AST/DeclCXX.h"
+#include "llvm/ADT/Triple.h"
+
+using namespace clang;
+
+TargetAttributesSema::~TargetAttributesSema() {}
+bool TargetAttributesSema::ProcessDeclAttribute(Scope *scope, Decl *D,
+ const AttributeList &Attr, Sema &S) const {
+ return false;
+}
+
+static void HandleMSP430InterruptAttr(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;
+ }
+
+ // FIXME: Check for decl - it should be void ()(void).
+
+ Expr *NumParamsExpr = static_cast<Expr *>(Attr.getArg(0));
+ llvm::APSInt NumParams(32);
+ if (!NumParamsExpr->isIntegerConstantExpr(NumParams, S.Context)) {
+ S.Diag(Attr.getLoc(), diag::err_attribute_argument_not_int)
+ << "interrupt" << NumParamsExpr->getSourceRange();
+ return;
+ }
+
+ unsigned Num = NumParams.getLimitedValue(255);
+ if ((Num & 1) || Num > 30) {
+ S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds)
+ << "interrupt" << (int)NumParams.getSExtValue()
+ << NumParamsExpr->getSourceRange();
+ return;
+ }
+
+ d->addAttr(::new (S.Context) MSP430InterruptAttr(Attr.getLoc(), S.Context, Num));
+ d->addAttr(::new (S.Context) UsedAttr(Attr.getLoc(), S.Context));
+ }
+
+namespace {
+ class MSP430AttributesSema : public TargetAttributesSema {
+ public:
+ MSP430AttributesSema() { }
+ bool ProcessDeclAttribute(Scope *scope, Decl *D,
+ const AttributeList &Attr, Sema &S) const {
+ if (Attr.getName()->getName() == "interrupt") {
+ HandleMSP430InterruptAttr(D, Attr, S);
+ return true;
+ }
+ return false;
+ }
+ };
+}
+
+static void HandleMBlazeInterruptHandlerAttr(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) << 1;
+ return;
+ }
+
+ // FIXME: Check for decl - it should be void ()(void).
+
+ d->addAttr(::new (S.Context) MBlazeInterruptHandlerAttr(Attr.getLoc(),
+ S.Context));
+ d->addAttr(::new (S.Context) UsedAttr(Attr.getLoc(), S.Context));
+}
+
+static void HandleMBlazeSaveVolatilesAttr(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) << 1;
+ return;
+ }
+
+ // FIXME: Check for decl - it should be void ()(void).
+
+ d->addAttr(::new (S.Context) MBlazeSaveVolatilesAttr(Attr.getLoc(),
+ S.Context));
+ d->addAttr(::new (S.Context) UsedAttr(Attr.getLoc(), S.Context));
+}
+
+
+namespace {
+ class MBlazeAttributesSema : public TargetAttributesSema {
+ public:
+ MBlazeAttributesSema() { }
+ bool ProcessDeclAttribute(Scope *scope, Decl *D, const AttributeList &Attr,
+ Sema &S) const {
+ if (Attr.getName()->getName() == "interrupt_handler") {
+ HandleMBlazeInterruptHandlerAttr(D, Attr, S);
+ return true;
+ } else if (Attr.getName()->getName() == "save_volatiles") {
+ HandleMBlazeSaveVolatilesAttr(D, Attr, S);
+ return true;
+ }
+ return false;
+ }
+ };
+}
+
+static void HandleX86ForceAlignArgPointerAttr(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;
+ }
+
+ // If we try to apply it to a function pointer, don't warn, but don't
+ // do anything, either. It doesn't matter anyway, because there's nothing
+ // special about calling a force_align_arg_pointer function.
+ ValueDecl *VD = dyn_cast<ValueDecl>(D);
+ if (VD && VD->getType()->isFunctionPointerType())
+ return;
+ // Also don't warn on function pointer typedefs.
+ TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D);
+ if (TD && (TD->getUnderlyingType()->isFunctionPointerType() ||
+ TD->getUnderlyingType()->isFunctionType()))
+ return;
+ // Attribute can only be applied to function types.
+ if (!isa<FunctionDecl>(D)) {
+ S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
+ << Attr.getName() << /* function */0;
+ return;
+ }
+
+ D->addAttr(::new (S.Context) X86ForceAlignArgPointerAttr(Attr.getRange(),
+ S.Context));
+}
+
+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;
+ }
+
+ // Attribute can be applied only to functions or variables.
+ if (isa<VarDecl>(D)) {
+ D->addAttr(::new (S.Context) DLLImportAttr(Attr.getLoc(), S.Context));
+ return;
+ }
+
+ FunctionDecl *FD = dyn_cast<FunctionDecl>(D);
+ if (!FD) {
+ // Apparently Visual C++ thinks it is okay to not emit a warning
+ // in this case, so only emit a warning when -fms-extensions is not
+ // specified.
+ if (!S.getLangOpts().MicrosoftExt)
+ S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
+ << Attr.getName() << 2 /*variable and function*/;
+ return;
+ }
+
+ // Currently, the dllimport attribute is ignored for inlined functions.
+ // Warning is emitted.
+ if (FD->isInlineSpecified()) {
+ S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "dllimport";
+ return;
+ }
+
+ // The attribute is also overridden by a subsequent declaration as dllexport.
+ // Warning is emitted.
+ for (AttributeList *nextAttr = Attr.getNext(); nextAttr;
+ nextAttr = nextAttr->getNext()) {
+ if (nextAttr->getKind() == AttributeList::AT_dllexport) {
+ S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "dllimport";
+ return;
+ }
+ }
+
+ if (D->getAttr<DLLExportAttr>()) {
+ S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "dllimport";
+ return;
+ }
+
+ D->addAttr(::new (S.Context) DLLImportAttr(Attr.getLoc(), S.Context));
+}
+
+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;
+ }
+
+ // Attribute can be applied only to functions or variables.
+ if (isa<VarDecl>(D)) {
+ D->addAttr(::new (S.Context) DLLExportAttr(Attr.getLoc(), S.Context));
+ return;
+ }
+
+ FunctionDecl *FD = dyn_cast<FunctionDecl>(D);
+ if (!FD) {
+ S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
+ << Attr.getName() << 2 /*variable and function*/;
+ return;
+ }
+
+ // Currently, the dllexport attribute is ignored for inlined functions, unless
+ // the -fkeep-inline-functions flag has been used. Warning is emitted;
+ if (FD->isInlineSpecified()) {
+ // FIXME: ... unless the -fkeep-inline-functions flag has been used.
+ S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "dllexport";
+ return;
+ }
+
+ D->addAttr(::new (S.Context) DLLExportAttr(Attr.getLoc(), S.Context));
+}
+
+namespace {
+ class X86AttributesSema : public TargetAttributesSema {
+ public:
+ X86AttributesSema() { }
+ bool ProcessDeclAttribute(Scope *scope, Decl *D,
+ const AttributeList &Attr, Sema &S) const {
+ const llvm::Triple &Triple(S.Context.getTargetInfo().getTriple());
+ if (Triple.getOS() == llvm::Triple::Win32 ||
+ Triple.getOS() == llvm::Triple::MinGW32) {
+ switch (Attr.getKind()) {
+ case AttributeList::AT_dllimport: HandleDLLImportAttr(D, Attr, S);
+ return true;
+ case AttributeList::AT_dllexport: HandleDLLExportAttr(D, Attr, S);
+ return true;
+ default: break;
+ }
+ }
+ if (Triple.getArch() != llvm::Triple::x86_64 &&
+ (Attr.getName()->getName() == "force_align_arg_pointer" ||
+ Attr.getName()->getName() == "__force_align_arg_pointer__")) {
+ HandleX86ForceAlignArgPointerAttr(D, Attr, S);
+ return true;
+ }
+ return false;
+ }
+ };
+}
+
+const TargetAttributesSema &Sema::getTargetAttributesSema() const {
+ if (TheTargetAttributesSema)
+ return *TheTargetAttributesSema;
+
+ const llvm::Triple &Triple(Context.getTargetInfo().getTriple());
+ switch (Triple.getArch()) {
+ case llvm::Triple::msp430:
+ return *(TheTargetAttributesSema = new MSP430AttributesSema);
+ case llvm::Triple::mblaze:
+ return *(TheTargetAttributesSema = new MBlazeAttributesSema);
+ case llvm::Triple::x86:
+ case llvm::Triple::x86_64:
+ return *(TheTargetAttributesSema = new X86AttributesSema);
+ default:
+ return *(TheTargetAttributesSema = new TargetAttributesSema);
+ }
+}
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