56 lines · cpp
1//===- M68k.cpp -----------------------------------------------------------===//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#include "ABIInfoImpl.h"10#include "TargetInfo.h"11 12using namespace clang;13using namespace clang::CodeGen;14 15//===----------------------------------------------------------------------===//16// M68k ABI Implementation17//===----------------------------------------------------------------------===//18 19namespace {20 21class M68kTargetCodeGenInfo : public TargetCodeGenInfo {22public:23 M68kTargetCodeGenInfo(CodeGenTypes &CGT)24 : TargetCodeGenInfo(std::make_unique<DefaultABIInfo>(CGT)) {}25 void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV,26 CodeGen::CodeGenModule &M) const override;27};28 29} // namespace30 31void M68kTargetCodeGenInfo::setTargetAttributes(32 const Decl *D, llvm::GlobalValue *GV, CodeGen::CodeGenModule &M) const {33 if (const auto *FD = dyn_cast_or_null<FunctionDecl>(D)) {34 if (const auto *attr = FD->getAttr<M68kInterruptAttr>()) {35 // Handle 'interrupt' attribute:36 llvm::Function *F = cast<llvm::Function>(GV);37 38 // Step 1: Set ISR calling convention.39 F->setCallingConv(llvm::CallingConv::M68k_INTR);40 41 // Step 2: Add attributes goodness.42 F->addFnAttr(llvm::Attribute::NoInline);43 44 // Step 3: Emit ISR vector alias.45 unsigned Num = attr->getNumber() / 2;46 llvm::GlobalAlias::create(llvm::Function::ExternalLinkage,47 "__isr_" + Twine(Num), F);48 }49 }50}51 52std::unique_ptr<TargetCodeGenInfo>53CodeGen::createM68kTargetCodeGenInfo(CodeGenModule &CGM) {54 return std::make_unique<M68kTargetCodeGenInfo>(CGM.getTypes());55}56