79 lines · cpp
1//===------ SemaMSP430.cpp ----- MSP430 target-specific routines ----------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file implements semantic analysis functions specific to NVPTX.10//11//===----------------------------------------------------------------------===//12 13#include "clang/Sema/SemaMSP430.h"14#include "clang/AST/ASTContext.h"15#include "clang/AST/Attr.h"16#include "clang/AST/DeclBase.h"17#include "clang/Basic/DiagnosticSema.h"18#include "clang/Sema/Attr.h"19#include "clang/Sema/ParsedAttr.h"20 21namespace clang {22 23SemaMSP430::SemaMSP430(Sema &S) : SemaBase(S) {}24 25void SemaMSP430::handleInterruptAttr(Decl *D, const ParsedAttr &AL) {26 // MSP430 'interrupt' attribute is applied to27 // a function with no parameters and void return type.28 if (!isFuncOrMethodForAttrSubject(D)) {29 Diag(D->getLocation(), diag::warn_attribute_wrong_decl_type)30 << AL << AL.isRegularKeywordAttribute() << ExpectedFunctionOrMethod;31 return;32 }33 34 if (hasFunctionProto(D) && getFunctionOrMethodNumParams(D) != 0) {35 Diag(D->getLocation(), diag::warn_interrupt_signal_attribute_invalid)36 << /*MSP430*/ 1 << /*interrupt*/ 0 << 0;37 return;38 }39 40 if (!getFunctionOrMethodResultType(D)->isVoidType()) {41 Diag(D->getLocation(), diag::warn_interrupt_signal_attribute_invalid)42 << /*MSP430*/ 1 << /*interrupt*/ 0 << 1;43 return;44 }45 46 // The attribute takes one integer argument.47 if (!AL.checkExactlyNumArgs(SemaRef, 1))48 return;49 50 if (!AL.isArgExpr(0)) {51 Diag(AL.getLoc(), diag::err_attribute_argument_type)52 << AL << AANT_ArgumentIntegerConstant;53 return;54 }55 56 Expr *NumParamsExpr = AL.getArgAsExpr(0);57 std::optional<llvm::APSInt> NumParams = llvm::APSInt(32);58 if (!(NumParams = NumParamsExpr->getIntegerConstantExpr(getASTContext()))) {59 Diag(AL.getLoc(), diag::err_attribute_argument_type)60 << AL << AANT_ArgumentIntegerConstant61 << NumParamsExpr->getSourceRange();62 return;63 }64 // The argument should be in range 0..63.65 unsigned Num = NumParams->getLimitedValue(255);66 if (Num > 63) {67 Diag(AL.getLoc(), diag::err_attribute_argument_out_of_bounds)68 << AL << (int)NumParams->getSExtValue()69 << NumParamsExpr->getSourceRange();70 return;71 }72 73 D->addAttr(::new (getASTContext())74 MSP430InterruptAttr(getASTContext(), AL, Num));75 D->addAttr(UsedAttr::CreateImplicit(getASTContext()));76}77 78} // namespace clang79