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//===------ SemaMSP430.cpp ----- MSP430 target-specific routines ----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements semantic analysis functions specific to NVPTX.
//
//===----------------------------------------------------------------------===//
#include "clang/Sema/SemaMSP430.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Attr.h"
#include "clang/AST/DeclBase.h"
#include "clang/Basic/DiagnosticSema.h"
#include "clang/Sema/Attr.h"
#include "clang/Sema/ParsedAttr.h"
namespace clang {
SemaMSP430::SemaMSP430(Sema &S) : SemaBase(S) {}
void SemaMSP430::handleInterruptAttr(Decl *D, const ParsedAttr &AL) {
// MSP430 'interrupt' attribute is applied to
// a function with no parameters and void return type.
if (!isFuncOrMethodForAttrSubject(D)) {
Diag(D->getLocation(), diag::warn_attribute_wrong_decl_type)
<< AL << AL.isRegularKeywordAttribute() << ExpectedFunctionOrMethod;
return;
}
if (hasFunctionProto(D) && getFunctionOrMethodNumParams(D) != 0) {
Diag(D->getLocation(), diag::warn_interrupt_attribute_invalid)
<< /*MSP430*/ 1 << 0;
return;
}
if (!getFunctionOrMethodResultType(D)->isVoidType()) {
Diag(D->getLocation(), diag::warn_interrupt_attribute_invalid)
<< /*MSP430*/ 1 << 1;
return;
}
// The attribute takes one integer argument.
if (!AL.checkExactlyNumArgs(SemaRef, 1))
return;
if (!AL.isArgExpr(0)) {
Diag(AL.getLoc(), diag::err_attribute_argument_type)
<< AL << AANT_ArgumentIntegerConstant;
return;
}
Expr *NumParamsExpr = static_cast<Expr *>(AL.getArgAsExpr(0));
std::optional<llvm::APSInt> NumParams = llvm::APSInt(32);
if (!(NumParams = NumParamsExpr->getIntegerConstantExpr(getASTContext()))) {
Diag(AL.getLoc(), diag::err_attribute_argument_type)
<< AL << AANT_ArgumentIntegerConstant
<< NumParamsExpr->getSourceRange();
return;
}
// The argument should be in range 0..63.
unsigned Num = NumParams->getLimitedValue(255);
if (Num > 63) {
Diag(AL.getLoc(), diag::err_attribute_argument_out_of_bounds)
<< AL << (int)NumParams->getSExtValue()
<< NumParamsExpr->getSourceRange();
return;
}
D->addAttr(::new (getASTContext())
MSP430InterruptAttr(getASTContext(), AL, Num));
D->addAttr(UsedAttr::CreateImplicit(getASTContext()));
}
} // namespace clang
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