llvm/lib/Target/CSKY/CSKYTargetMachine.cpp

   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 }