354 lines
12 KiB
C++
354 lines
12 KiB
C++
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//===-- TargetAttributesSema.cpp - Encapsulate target attributes-*- C++ -*-===//
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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 contains semantic analysis implementation for target-specific
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// attributes.
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//
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//===----------------------------------------------------------------------===//
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#include "TargetAttributesSema.h"
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#include "clang/AST/DeclCXX.h"
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#include "clang/Basic/TargetInfo.h"
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#include "clang/Sema/SemaInternal.h"
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#include "llvm/ADT/Triple.h"
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using namespace clang;
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TargetAttributesSema::~TargetAttributesSema() {}
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bool TargetAttributesSema::ProcessDeclAttribute(Scope *scope, Decl *D,
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const AttributeList &Attr, Sema &S) const {
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return false;
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}
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static void HandleARMInterruptAttr(Decl *d,
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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_too_many_arguments)
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<< 1;
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return;
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}
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StringRef Str;
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SourceLocation ArgLoc;
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if (Attr.getNumArgs() == 0)
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Str = "";
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else if (!S.checkStringLiteralArgumentAttr(Attr, 0, Str, &ArgLoc))
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return;
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ARMInterruptAttr::InterruptType Kind;
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if (!ARMInterruptAttr::ConvertStrToInterruptType(Str, Kind)) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_type_not_supported)
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<< Attr.getName() << Str << ArgLoc;
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return;
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}
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unsigned Index = Attr.getAttributeSpellingListIndex();
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d->addAttr(::new (S.Context)
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ARMInterruptAttr(Attr.getLoc(), S.Context, Kind, Index));
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}
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namespace {
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class ARMAttributesSema : public TargetAttributesSema {
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public:
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ARMAttributesSema() { }
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bool ProcessDeclAttribute(Scope *scope, Decl *D,
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const AttributeList &Attr, Sema &S) const {
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if (Attr.getName()->getName() == "interrupt") {
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HandleARMInterruptAttr(D, Attr, S);
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return true;
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}
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return false;
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}
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};
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}
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static void HandleMSP430InterruptAttr(Decl *d,
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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)
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<< Attr.getName() << 1;
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return;
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}
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// FIXME: Check for decl - it should be void ()(void).
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Expr *NumParamsExpr = static_cast<Expr *>(Attr.getArgAsExpr(0));
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llvm::APSInt NumParams(32);
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if (!NumParamsExpr->isIntegerConstantExpr(NumParams, S.Context)) {
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S.Diag(Attr.getLoc(), diag::err_attribute_argument_type)
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<< Attr.getName() << AANT_ArgumentIntegerConstant
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<< NumParamsExpr->getSourceRange();
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return;
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}
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unsigned Num = NumParams.getLimitedValue(255);
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if ((Num & 1) || Num > 30) {
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S.Diag(Attr.getLoc(), diag::err_attribute_argument_out_of_bounds)
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<< "interrupt" << (int)NumParams.getSExtValue()
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<< NumParamsExpr->getSourceRange();
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return;
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}
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d->addAttr(::new (S.Context) MSP430InterruptAttr(Attr.getLoc(), S.Context, Num));
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d->addAttr(::new (S.Context) UsedAttr(Attr.getLoc(), S.Context));
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}
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namespace {
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class MSP430AttributesSema : public TargetAttributesSema {
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public:
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MSP430AttributesSema() { }
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bool ProcessDeclAttribute(Scope *scope, Decl *D,
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const AttributeList &Attr, Sema &S) const {
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if (Attr.getName()->getName() == "interrupt") {
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HandleMSP430InterruptAttr(D, Attr, S);
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return true;
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}
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return false;
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}
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};
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}
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static void HandleX86ForceAlignArgPointerAttr(Decl *D,
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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)
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<< Attr.getName() << 0;
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return;
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}
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// If we try to apply it to a function pointer, don't warn, but don't
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// do anything, either. It doesn't matter anyway, because there's nothing
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// special about calling a force_align_arg_pointer function.
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ValueDecl *VD = dyn_cast<ValueDecl>(D);
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if (VD && VD->getType()->isFunctionPointerType())
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return;
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// Also don't warn on function pointer typedefs.
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TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D);
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if (TD && (TD->getUnderlyingType()->isFunctionPointerType() ||
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TD->getUnderlyingType()->isFunctionType()))
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return;
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// Attribute can only be applied to function types.
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if (!isa<FunctionDecl>(D)) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
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<< Attr.getName() << /* function */0;
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return;
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}
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D->addAttr(::new (S.Context) X86ForceAlignArgPointerAttr(Attr.getRange(),
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S.Context));
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}
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DLLImportAttr *Sema::mergeDLLImportAttr(Decl *D, SourceRange Range,
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unsigned AttrSpellingListIndex) {
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if (D->hasAttr<DLLExportAttr>()) {
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Diag(Range.getBegin(), diag::warn_attribute_ignored) << "dllimport";
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return NULL;
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}
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if (D->hasAttr<DLLImportAttr>())
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return NULL;
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if (VarDecl *VD = dyn_cast<VarDecl>(D)) {
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if (VD->hasDefinition()) {
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// dllimport cannot be applied to definitions.
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Diag(D->getLocation(), diag::warn_attribute_invalid_on_definition)
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<< "dllimport";
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return NULL;
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}
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}
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return ::new (Context) DLLImportAttr(Range, Context,
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AttrSpellingListIndex);
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}
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static void HandleDLLImportAttr(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)
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<< Attr.getName() << 0;
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return;
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}
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// Attribute can be applied only to functions or variables.
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FunctionDecl *FD = dyn_cast<FunctionDecl>(D);
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if (!FD && !isa<VarDecl>(D)) {
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// Apparently Visual C++ thinks it is okay to not emit a warning
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// in this case, so only emit a warning when -fms-extensions is not
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// specified.
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if (!S.getLangOpts().MicrosoftExt)
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S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
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<< Attr.getName() << 2 /*variable and function*/;
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return;
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}
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// Currently, the dllimport attribute is ignored for inlined functions.
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// Warning is emitted.
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if (FD && FD->isInlineSpecified()) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "dllimport";
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return;
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}
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unsigned Index = Attr.getAttributeSpellingListIndex();
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DLLImportAttr *NewAttr = S.mergeDLLImportAttr(D, Attr.getRange(), Index);
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if (NewAttr)
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D->addAttr(NewAttr);
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}
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DLLExportAttr *Sema::mergeDLLExportAttr(Decl *D, SourceRange Range,
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unsigned AttrSpellingListIndex) {
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if (DLLImportAttr *Import = D->getAttr<DLLImportAttr>()) {
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Diag(Import->getLocation(), diag::warn_attribute_ignored) << "dllimport";
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D->dropAttr<DLLImportAttr>();
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}
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if (D->hasAttr<DLLExportAttr>())
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return NULL;
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return ::new (Context) DLLExportAttr(Range, Context,
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AttrSpellingListIndex);
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}
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static void HandleDLLExportAttr(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)
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<< Attr.getName() << 0;
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return;
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}
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// Attribute can be applied only to functions or variables.
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FunctionDecl *FD = dyn_cast<FunctionDecl>(D);
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if (!FD && !isa<VarDecl>(D)) {
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S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
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<< Attr.getName() << 2 /*variable and function*/;
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return;
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}
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// Currently, the dllexport attribute is ignored for inlined functions, unless
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// the -fkeep-inline-functions flag has been used. Warning is emitted;
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if (FD && FD->isInlineSpecified()) {
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// FIXME: ... unless the -fkeep-inline-functions flag has been used.
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S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "dllexport";
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return;
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}
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unsigned Index = Attr.getAttributeSpellingListIndex();
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DLLExportAttr *NewAttr = S.mergeDLLExportAttr(D, Attr.getRange(), Index);
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if (NewAttr)
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D->addAttr(NewAttr);
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}
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namespace {
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class X86AttributesSema : public TargetAttributesSema {
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public:
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X86AttributesSema() { }
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bool ProcessDeclAttribute(Scope *scope, Decl *D,
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const AttributeList &Attr, Sema &S) const {
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const llvm::Triple &Triple(S.Context.getTargetInfo().getTriple());
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if (Triple.getOS() == llvm::Triple::Win32 ||
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Triple.getOS() == llvm::Triple::MinGW32) {
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switch (Attr.getKind()) {
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case AttributeList::AT_DLLImport: HandleDLLImportAttr(D, Attr, S);
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return true;
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case AttributeList::AT_DLLExport: HandleDLLExportAttr(D, Attr, S);
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return true;
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default: break;
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}
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}
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if (Triple.getArch() != llvm::Triple::x86_64 &&
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(Attr.getName()->getName() == "force_align_arg_pointer" ||
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Attr.getName()->getName() == "__force_align_arg_pointer__")) {
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HandleX86ForceAlignArgPointerAttr(D, Attr, S);
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return true;
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}
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return false;
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}
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};
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}
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static void HandleMips16Attr(Decl *D, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs()) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments)
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<< Attr.getName() << 0;
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return;
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}
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// Attribute can only be applied to function types.
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if (!isa<FunctionDecl>(D)) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_decl_type)
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<< Attr.getName() << /* function */0;
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return;
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}
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D->addAttr(::new (S.Context) Mips16Attr(Attr.getRange(), S.Context,
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Attr.getAttributeSpellingListIndex()));
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}
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static void HandleNoMips16Attr(Decl *D, const AttributeList &Attr, Sema &S) {
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// check the attribute arguments.
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if (Attr.getNumArgs()) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments)
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<< Attr.getName() << 0;
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return;
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}
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// Attribute can only be applied to function types.
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if (!isa<FunctionDecl>(D)) {
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S.Diag(Attr.getLoc(), diag::err_attribute_wrong_decl_type)
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<< Attr.getName() << /* function */0;
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return;
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}
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D->addAttr(::new (S.Context)
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NoMips16Attr(Attr.getRange(), S.Context,
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Attr.getAttributeSpellingListIndex()));
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}
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namespace {
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class MipsAttributesSema : public TargetAttributesSema {
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public:
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MipsAttributesSema() { }
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bool ProcessDeclAttribute(Scope *scope, Decl *D, const AttributeList &Attr,
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Sema &S) const {
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if (Attr.getName()->getName() == "mips16") {
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HandleMips16Attr(D, Attr, S);
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return true;
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} else if (Attr.getName()->getName() == "nomips16") {
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HandleNoMips16Attr(D, Attr, S);
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return true;
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}
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return false;
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}
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};
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}
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const TargetAttributesSema &Sema::getTargetAttributesSema() const {
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if (TheTargetAttributesSema)
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return *TheTargetAttributesSema;
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const llvm::Triple &Triple(Context.getTargetInfo().getTriple());
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switch (Triple.getArch()) {
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case llvm::Triple::arm:
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case llvm::Triple::thumb:
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return *(TheTargetAttributesSema = new ARMAttributesSema);
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case llvm::Triple::msp430:
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return *(TheTargetAttributesSema = new MSP430AttributesSema);
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case llvm::Triple::x86:
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case llvm::Triple::x86_64:
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return *(TheTargetAttributesSema = new X86AttributesSema);
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case llvm::Triple::mips:
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case llvm::Triple::mipsel:
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return *(TheTargetAttributesSema = new MipsAttributesSema);
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default:
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return *(TheTargetAttributesSema = new TargetAttributesSema);
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}
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}
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