llvm-6502/lib/Target/MBlaze/MBlazeTargetMachine.cpp
2011-07-25 20:18:18 +00:00

63 lines
2.3 KiB
C++

//===-- MBlazeTargetMachine.cpp - Define TargetMachine for MBlaze ---------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Implements the info about MBlaze target spec.
//
//===----------------------------------------------------------------------===//
#include "MBlaze.h"
#include "MBlazeTargetMachine.h"
#include "llvm/PassManager.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegistry.h"
using namespace llvm;
extern "C" void LLVMInitializeMBlazeTarget() {
// Register the target.
RegisterTargetMachine<MBlazeTargetMachine> X(TheMBlazeTarget);
}
// DataLayout --> Big-endian, 32-bit pointer/ABI/alignment
// The stack is always 8 byte aligned
// On function prologue, the stack is created by decrementing
// its pointer. Once decremented, all references are done with positive
// offset from the stack/frame pointer, using StackGrowsUp enables
// an easier handling.
MBlazeTargetMachine::
MBlazeTargetMachine(const Target &T, StringRef TT,
StringRef CPU, StringRef FS,
Reloc::Model RM, CodeModel::Model CM):
LLVMTargetMachine(T, TT, CPU, FS, RM, CM),
Subtarget(TT, CPU, FS),
DataLayout("E-p:32:32:32-i8:8:8-i16:16:16"),
InstrInfo(*this),
FrameLowering(Subtarget),
TLInfo(*this), TSInfo(*this), ELFWriterInfo(*this),
InstrItins(Subtarget.getInstrItineraryData()) {
}
// Install an instruction selector pass using
// the ISelDag to gen MBlaze code.
bool MBlazeTargetMachine::addInstSelector(PassManagerBase &PM,
CodeGenOpt::Level OptLevel) {
PM.add(createMBlazeISelDag(*this));
return false;
}
// Implemented by targets that want to run passes immediately before
// machine code is emitted. return true if -print-machineinstrs should
// print out the code after the passes.
bool MBlazeTargetMachine::addPreEmitPass(PassManagerBase &PM,
CodeGenOpt::Level OptLevel) {
PM.add(createMBlazeDelaySlotFillerPass(*this));
return true;
}