| 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-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "ABIInfoImpl.h" |
| 10 | #include "TargetInfo.h" |
| 11 | |
| 12 | using namespace clang; |
| 13 | using namespace clang::CodeGen; |
| 14 | |
| 15 | //===----------------------------------------------------------------------===// |
| 16 | // M68k ABI Implementation |
| 17 | //===----------------------------------------------------------------------===// |
| 18 | |
| 19 | namespace { |
| 20 | |
| 21 | class M68kTargetCodeGenInfo : public TargetCodeGenInfo { |
| 22 | public: |
| 23 | M68kTargetCodeGenInfo(CodeGenTypes &CGT) |
| 24 | : TargetCodeGenInfo(std::make_unique<DefaultABIInfo>(args&: CGT)) {} |
| 25 | void setTargetAttributes(const Decl *D, llvm::GlobalValue *GV, |
| 26 | CodeGen::CodeGenModule &M) const override; |
| 27 | }; |
| 28 | |
| 29 | } // namespace |
| 30 | |
| 31 | void M68kTargetCodeGenInfo::setTargetAttributes( |
| 32 | const Decl *D, llvm::GlobalValue *GV, CodeGen::CodeGenModule &M) const { |
| 33 | if (const auto *FD = dyn_cast_or_null<FunctionDecl>(Val: D)) { |
| 34 | if (const auto *attr = FD->getAttr<M68kInterruptAttr>()) { |
| 35 | // Handle 'interrupt' attribute: |
| 36 | llvm::Function *F = cast<llvm::Function>(Val: 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(Linkage: llvm::Function::ExternalLinkage, |
| 47 | Name: "__isr_"+ Twine(Num), Aliasee: F); |
| 48 | } |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | std::unique_ptr<TargetCodeGenInfo> |
| 53 | CodeGen::createM68kTargetCodeGenInfo(CodeGenModule &CGM) { |
| 54 | return std::make_unique<M68kTargetCodeGenInfo>(args&: CGM.getTypes()); |
| 55 | } |
| 56 |