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 "MBlaze.h" 15 #include "MBlazeTargetMachine.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" 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, 37 Reloc::Model RM, CodeModel::Model CM): 38 LLVMTargetMachine(T, TT, CPU, FS, RM, CM), 39 Subtarget(TT, CPU, FS), 40 DataLayout("E-p:32:32:32-i8:8:8-i16:16:16"), 41 InstrInfo(*this), 42 FrameLowering(Subtarget), 43 TLInfo(*this), TSInfo(*this), ELFWriterInfo(*this), 44 InstrItins(Subtarget.getInstrItineraryData()) { 45 } 46 47 // Install an instruction selector pass using 48 // the ISelDag to gen MBlaze code. 49 bool MBlazeTargetMachine::addInstSelector(PassManagerBase &PM, 50 CodeGenOpt::Level OptLevel) { 51 PM.add(createMBlazeISelDag(*this)); 52 return false; 53 } 54 55 // Implemented by targets that want to run passes immediately before 56 // machine code is emitted. return true if -print-machineinstrs should 57 // print out the code after the passes. 58 bool MBlazeTargetMachine::addPreEmitPass(PassManagerBase &PM, 59 CodeGenOpt::Level OptLevel) { 60 PM.add(createMBlazeDelaySlotFillerPass(*this)); 61 return true; 62 } 63
