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//===- M68k.cpp -----------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "ABIInfoImpl.h"
#include "TargetInfo.h"
using namespace clang;
using namespace clang::CodeGen;
//===----------------------------------------------------------------------===//
// M68k ABI Implementation
//===----------------------------------------------------------------------===//
namespace {
class M68kTargetCodeGenInfo : public TargetCodeGenInfo {
public:
M68kTargetCodeGenInfo(CodeGenTypes &CGT)
: TargetCodeGenInfo(std::make_unique<DefaultABIInfo>(CGT)) {}
void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
CodeGen::CodeGenModule &M) const override;
};
} // namespace
void M68kTargetCodeGenInfo::setTargetAttributes(
const Decl *D, llvm::GlobalValue *GV, CodeGen::CodeGenModule &M) const {
if (const auto *FD = dyn_cast_or_null<FunctionDecl>(D)) {
if (const auto *attr = FD->getAttr<M68kInterruptAttr>()) {
// Handle 'interrupt' attribute:
llvm::Function *F = cast<llvm::Function>(GV);
// Step 1: Set ISR calling convention.
F->setCallingConv(llvm::CallingConv::M68k_INTR);
// Step 2: Add attributes goodness.
F->addFnAttr(llvm::Attribute::NoInline);
// Step 3: Emit ISR vector alias.
unsigned Num = attr->getNumber() / 2;
llvm::GlobalAlias::create(llvm::Function::ExternalLinkage,
"__isr_" + Twine(Num), F);
}
}
}
std::unique_ptr<TargetCodeGenInfo>
CodeGen::createM68kTargetCodeGenInfo(CodeGenModule &CGM) {
return std::make_unique<M68kTargetCodeGenInfo>(CGM.getTypes());
}
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