forked from OSchip/llvm-project
87 lines
2.7 KiB
C++
87 lines
2.7 KiB
C++
//===-- 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 "Sema.h"
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#include "TargetAttributesSema.h"
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#include "clang/Basic/TargetInfo.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 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) << 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.getArg(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_not_int)
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<< "interrupt" << 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(Num));
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d->addAttr(::new (S.Context) UsedAttr());
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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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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.Target.getTriple());
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switch (Triple.getArch()) {
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default:
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return *(TheTargetAttributesSema = new TargetAttributesSema);
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case llvm::Triple::msp430:
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return *(TheTargetAttributesSema = new MSP430AttributesSema);
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}
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}
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