1 //===--- CSKYTargetMachine.cpp - Define TargetMachine for CSKY ------------===// 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 // Implements the info about CSKY target spec. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "CSKYTargetMachine.h" 14 #include "TargetInfo/CSKYTargetInfo.h" 15 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h" 16 #include "llvm/CodeGen/TargetPassConfig.h" 17 #include "llvm/Support/TargetRegistry.h" 18 19 using namespace llvm; 20 21 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeCSKYTarget() { 22 RegisterTargetMachine<CSKYTargetMachine> X(getTheCSKYTarget()); 23 } 24 25 static std::string computeDataLayout(const Triple &TT) { 26 std::string Ret; 27 28 // Only support little endian for now. 29 // TODO: Add support for big endian. 30 Ret += "e"; 31 32 // CSKY is always 32-bit target with the CSKYv2 ABI as prefer now. 33 // It's a 4-byte aligned stack with ELF mangling only. 34 Ret += "-m:e-S32-p:32:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:32:32" 35 "-v128:32:32-a:0:32-Fi32-n32"; 36 37 return Ret; 38 } 39 40 CSKYTargetMachine::CSKYTargetMachine(const Target &T, const Triple &TT, 41 StringRef CPU, StringRef FS, 42 const TargetOptions &Options, 43 Optional<Reloc::Model> RM, 44 Optional<CodeModel::Model> CM, 45 CodeGenOpt::Level OL, bool JIT) 46 : LLVMTargetMachine(T, computeDataLayout(TT), TT, CPU, FS, Options, 47 RM.getValueOr(Reloc::Static), 48 getEffectiveCodeModel(CM, CodeModel::Small), OL), 49 TLOF(std::make_unique<TargetLoweringObjectFileELF>()) { 50 initAsmInfo(); 51 } 52 53 namespace { 54 class CSKYPassConfig : public TargetPassConfig { 55 public: 56 CSKYPassConfig(CSKYTargetMachine &TM, PassManagerBase &PM) 57 : TargetPassConfig(TM, PM) {} 58 59 CSKYTargetMachine &getCSKYTargetMachine() const { 60 return getTM<CSKYTargetMachine>(); 61 } 62 }; 63 64 } // namespace 65 66 TargetPassConfig *CSKYTargetMachine::createPassConfig(PassManagerBase &PM) { 67 return new CSKYPassConfig(*this, PM); 68 } 69