lib/Target/ZPU/ZPUTargetMachine.cpp

   1 //===-- ZPUTargetMachine.cpp - Define TargetMachine for ZPU -------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // Implements the info about ZPU target spec.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "ZPU.h"
  15 #include "ZPUMCAsmInfo.h"
  16 #include "ZPUTargetMachine.h"
  17 #include "llvm/PassManager.h"
  18 #include "llvm/Target/TargetRegistry.h"
  19 using namespace llvm;
  20
  21 extern "C" void LLVMInitializeZPUTarget() {
  22   // Register the target.
  23   RegisterTargetMachine<ZPUTargetMachine> X(TheZPUTarget);
  24   RegisterAsmInfo<ZPUMCAsmInfo> Y(TheZPUTarget);
  25 }
  26
  27
  28 bool ZPUTargetMachine::
  29 addInstSelector(PassManagerBase &PM, CodeGenOpt::Level OptLevel)
  30 {
  31   PM.add(createZPUISelDag(*this));
  32   return false;
  33 }
  34
  35
  36 // DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
  37 // The stack is always 8 byte aligned
  38 // On function prologue, the stack is created by decrementing
  39 // its pointer. Once decremented, all references are done with positive
  40 // offset from the stack/frame pointer, using StackGrowsUp enables
  41 // an easier handling.
  42 // Using CodeModel::Large enables different CALL behavior.
  43 ZPUTargetMachine::
  44 ZPUTargetMachine(const Target &T, const std::string &TT, const std::string &FS,
  45         bool isLittle):
  46   LLVMTargetMachine(T, TT),
  47   Subtarget(TT, FS, isLittle),
  48   DataLayout(std::string("e-p:32:32:32-i8:8:32-i16:16:32-n32")),
  49   InstrInfo(*this),
  50   FrameInfo(TargetFrameInfo::StackGrowsUp, 8, 0),
  51   TLInfo(*this)
  52 {
  53   setRelocationModel(Reloc::Static);
  54 }