1//===-- MBlazeTargetMachine.cpp - Define TargetMachine for MBlaze ---------===// 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 MBlaze target spec. 11// 12//===----------------------------------------------------------------------===// 13 14#include "MBlazeTargetMachine.h" 15#include "MBlaze.h" 16#include "llvm/PassManager.h" 17#include "llvm/CodeGen/Passes.h" 18#include "llvm/Support/FormattedStream.h" 19#include "llvm/Support/TargetRegistry.h" 20#include "llvm/Target/TargetOptions.h" 21using namespace llvm; 22 23extern "C" void LLVMInitializeMBlazeTarget() { 24 // Register the target. 25 RegisterTargetMachine<MBlazeTargetMachine> X(TheMBlazeTarget); 26} 27 28// DataLayout --> Big-endian, 32-bit pointer/ABI/alignment 29// The stack is always 8 byte aligned 30// On function prologue, the stack is created by decrementing 31// its pointer. Once decremented, all references are done with positive 32// offset from the stack/frame pointer, using StackGrowsUp enables 33// an easier handling. 34MBlazeTargetMachine:: 35MBlazeTargetMachine(const Target &T, StringRef TT, 36 StringRef CPU, StringRef FS, const TargetOptions &Options, 37 Reloc::Model RM, CodeModel::Model CM, 38 CodeGenOpt::Level OL) 39 : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL), 40 Subtarget(TT, CPU, FS), 41 DataLayout("E-p:32:32:32-i8:8:8-i16:16:16"), 42 InstrInfo(*this), 43 FrameLowering(Subtarget), 44 TLInfo(*this), TSInfo(*this), ELFWriterInfo(*this), 45 InstrItins(Subtarget.getInstrItineraryData()) { 46} 47 48namespace { 49/// MBlaze Code Generator Pass Configuration Options. 50class MBlazePassConfig : public TargetPassConfig { 51public: 52 MBlazePassConfig(MBlazeTargetMachine *TM, PassManagerBase &PM) 53 : TargetPassConfig(TM, PM) {} 54 55 MBlazeTargetMachine &getMBlazeTargetMachine() const { 56 return getTM<MBlazeTargetMachine>(); 57 } 58 59 virtual bool addInstSelector(); 60 virtual bool addPreEmitPass(); 61}; 62} // namespace 63 64TargetPassConfig *MBlazeTargetMachine::createPassConfig(PassManagerBase &PM) { 65 return new MBlazePassConfig(this, PM); 66} 67 68// Install an instruction selector pass using 69// the ISelDag to gen MBlaze code. 70bool MBlazePassConfig::addInstSelector() { 71 addPass(createMBlazeISelDag(getMBlazeTargetMachine())); 72 return false; 73} 74 75// Implemented by targets that want to run passes immediately before 76// machine code is emitted. return true if -print-machineinstrs should 77// print out the code after the passes. 78bool MBlazePassConfig::addPreEmitPass() { 79 addPass(createMBlazeDelaySlotFillerPass(getMBlazeTargetMachine())); 80 return true; 81} 82