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/CodeGen/Passes.h" 17 #include "llvm/PassManager.h" 18 #include "llvm/Support/FormattedStream.h" 19 #include "llvm/Support/TargetRegistry.h" 20 #include "llvm/Target/TargetOptions.h" 21 using namespace llvm; 22 23 extern "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. 34 MBlazeTargetMachine:: 35 MBlazeTargetMachine(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 DL("E-p:32:32:32-i8:8:8-i16:16:16"), 42 InstrInfo(*this), 43 FrameLowering(Subtarget), 44 TLInfo(*this), TSInfo(*this), 45 InstrItins(Subtarget.getInstrItineraryData()) { 46 } 47 48 namespace { 49 /// MBlaze Code Generator Pass Configuration Options. 50 class MBlazePassConfig : public TargetPassConfig { 51 public: 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 64 TargetPassConfig *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. 70 bool 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. 78 bool MBlazePassConfig::addPreEmitPass() { 79 addPass(createMBlazeDelaySlotFillerPass(getMBlazeTargetMachine())); 80 return true; 81 } 82
