Remove the mblaze backend from llvm.

Approval in here http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-July/064169.html

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187145 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 326 deletions

diff --git a/lib/Target/MBlaze/MBlazeAsmPrinter.cpp b/lib/Target/MBlaze/MBlazeAsmPrinter.cpp
deleted file mode 100644
index 7dafaef0af..0000000000
--- a/lib/Target/MBlaze/MBlazeAsmPrinter.cpp
+++ /dev/null
@@ -1,326 +0,0 @@
-//===-- MBlazeAsmPrinter.cpp - MBlaze LLVM assembly writer ----------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains a printer that converts from our internal representation
-// of machine-dependent LLVM code to GAS-format MBlaze assembly language.
-//
-//===----------------------------------------------------------------------===//
-
-#define DEBUG_TYPE "mblaze-asm-printer"
-
-#include "MBlaze.h"
-#include "InstPrinter/MBlazeInstPrinter.h"
-#include "MBlazeInstrInfo.h"
-#include "MBlazeMCInstLower.h"
-#include "MBlazeMachineFunction.h"
-#include "MBlazeSubtarget.h"
-#include "MBlazeTargetMachine.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/MachineConstantPool.h"
-#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/IR/Constants.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/DerivedTypes.h"
-#include "llvm/IR/Module.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCInst.h"
-#include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCSymbol.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/TargetRegistry.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/Mangler.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
-#include <cctype>
-
-using namespace llvm;
-
-namespace {
-  class MBlazeAsmPrinter : public AsmPrinter {
-    const MBlazeSubtarget *Subtarget;
-  public:
-    explicit MBlazeAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
-      : AsmPrinter(TM, Streamer) {
-      Subtarget = &TM.getSubtarget<MBlazeSubtarget>();
-    }
-
-    virtual const char *getPassName() const {
-      return "MBlaze Assembly Printer";
-    }
-
-    void printSavedRegsBitmask();
-    void emitFrameDirective();
-    virtual void EmitFunctionBodyStart();
-    virtual void EmitFunctionBodyEnd();
-    virtual void EmitFunctionEntryLabel();
-
-    virtual bool isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB)
-      const;
-
-    bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
-                         unsigned AsmVariant, const char *ExtraCode,
-                         raw_ostream &O);
-    void printOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
-    void printUnsignedImm(const MachineInstr *MI, int opNum, raw_ostream &O);
-    void printFSLImm(const MachineInstr *MI, int opNum, raw_ostream &O);
-    void printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
-                         const char *Modifier = 0);
-
-    void EmitInstruction(const MachineInstr *MI);
-  };
-} // end of anonymous namespace
-
-// #include "MBlazeGenAsmWriter.inc"
-
-//===----------------------------------------------------------------------===//
-//
-//  MBlaze Asm Directives
-//
-//  -- Frame directive "frame Stackpointer, Stacksize, RARegister"
-//  Describe the stack frame.
-//
-//  -- Mask directives "mask  bitmask, offset"
-//  Tells the assembler which registers are saved and where.
-//  bitmask - contain a little endian bitset indicating which registers are
-//            saved on function prologue (e.g. with a 0x80000000 mask, the
-//            assembler knows the register 31 (RA) is saved at prologue.
-//  offset  - the position before stack pointer subtraction indicating where
-//            the first saved register on prologue is located. (e.g. with a
-//
-//  Consider the following function prologue:
-//
-//    .frame  R19,48,R15
-//    .mask   0xc0000000,-8
-//       addiu R1, R1, -48
-//       sw R15, 40(R1)
-//       sw R19, 36(R1)
-//
-//    With a 0xc0000000 mask, the assembler knows the register 15 (R15) and
-//    19 (R19) are saved at prologue. As the save order on prologue is from
-//    left to right, R15 is saved first. A -8 offset means that after the
-//    stack pointer subtration, the first register in the mask (R15) will be
-//    saved at address 48-8=40.
-//
-//===----------------------------------------------------------------------===//
-
-// Print a 32 bit hex number with all numbers.
-static void printHex32(unsigned int Value, raw_ostream &O) {
-  O << "0x";
-  for (int i = 7; i >= 0; i--)
-    O.write_hex((Value & (0xF << (i*4))) >> (i*4));
-}
-
-// Create a bitmask with all callee saved registers for CPU or Floating Point
-// registers. For CPU registers consider RA, GP and FP for saving if necessary.
-void MBlazeAsmPrinter::printSavedRegsBitmask() {
-  const TargetFrameLowering *TFI = TM.getFrameLowering();
-  const TargetRegisterInfo &RI = *TM.getRegisterInfo();
-
-  // CPU Saved Registers Bitmasks
-  unsigned int CPUBitmask = 0;
-
-  // Set the CPU Bitmasks
-  const MachineFrameInfo *MFI = MF->getFrameInfo();
-  const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
-  for (unsigned i = 0, e = CSI.size(); i != e; ++i) {
-    unsigned Reg = CSI[i].getReg();
-    unsigned RegNum = getMBlazeRegisterNumbering(Reg);
-    if (MBlaze::GPRRegClass.contains(Reg))
-      CPUBitmask |= (1 << RegNum);
-  }
-
-  // Return Address and Frame registers must also be set in CPUBitmask.
-  if (TFI->hasFP(*MF))
-    CPUBitmask |= (1 <<  getMBlazeRegisterNumbering(RI.getFrameRegister(*MF)));
-
-  if (MFI->adjustsStack())
-    CPUBitmask |= (1 << getMBlazeRegisterNumbering(RI.getRARegister()));
-
-  // Print CPUBitmask
-  OutStreamer.EmitRawText("\t.mask\t0x" + Twine::utohexstr(CPUBitmask));
-}
-
-/// Frame Directive
-void MBlazeAsmPrinter::emitFrameDirective() {
-  if (!OutStreamer.hasRawTextSupport())
-    return;
-
-  const TargetRegisterInfo &RI = *TM.getRegisterInfo();
-  unsigned stkReg = RI.getFrameRegister(*MF);
-  unsigned retReg = RI.getRARegister();
-  unsigned stkSze = MF->getFrameInfo()->getStackSize();
-
-  OutStreamer.EmitRawText("\t.frame\t" +
-                          Twine(MBlazeInstPrinter::getRegisterName(stkReg)) +
-                          "," + Twine(stkSze) + "," +
-                          Twine(MBlazeInstPrinter::getRegisterName(retReg)));
-}
-
-void MBlazeAsmPrinter::EmitFunctionEntryLabel() {
-  if (OutStreamer.hasRawTextSupport())
-    OutStreamer.EmitRawText("\t.ent\t" + Twine(CurrentFnSym->getName()));
-  AsmPrinter::EmitFunctionEntryLabel();
-}
-
-void MBlazeAsmPrinter::EmitFunctionBodyStart() {
-  if (!OutStreamer.hasRawTextSupport())
-    return;
-
-  emitFrameDirective();
-  printSavedRegsBitmask();
-}
-
-void MBlazeAsmPrinter::EmitFunctionBodyEnd() {
-  if (OutStreamer.hasRawTextSupport())
-    OutStreamer.EmitRawText("\t.end\t" + Twine(CurrentFnSym->getName()));
-}
-
-//===----------------------------------------------------------------------===//
-void MBlazeAsmPrinter::EmitInstruction(const MachineInstr *MI) {
-  MBlazeMCInstLower MCInstLowering(OutContext, *this);
-
-  MCInst TmpInst;
-  MCInstLowering.Lower(MI, TmpInst);
-  OutStreamer.EmitInstruction(TmpInst);
-}
-
-// Print out an operand for an inline asm expression.
-bool MBlazeAsmPrinter::
-PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
-                unsigned AsmVariant,const char *ExtraCode, raw_ostream &O) {
-  // Does this asm operand have a single letter operand modifier?
-  if (ExtraCode && ExtraCode[0])
-    if (ExtraCode[1] != 0) return true; // Unknown modifier.
-
-    switch (ExtraCode[0]) {
-    default:
-      // See if this is a generic print operand
-      return AsmPrinter::PrintAsmOperand(MI, OpNo, AsmVariant, ExtraCode, O);
-    }
-
-  printOperand(MI, OpNo, O);
-  return false;
-}
-
-void MBlazeAsmPrinter::printOperand(const MachineInstr *MI, int opNum,
-                                    raw_ostream &O) {
-  const MachineOperand &MO = MI->getOperand(opNum);
-
-  switch (MO.getType()) {
-  case MachineOperand::MO_Register:
-    O << MBlazeInstPrinter::getRegisterName(MO.getReg());
-    break;
-
-  case MachineOperand::MO_Immediate:
-    O << (int32_t)MO.getImm();
-    break;
-
-  case MachineOperand::MO_FPImmediate: {
-    const ConstantFP *fp = MO.getFPImm();
-    printHex32(fp->getValueAPF().bitcastToAPInt().getZExtValue(), O);
-    O << ";\t# immediate = " << *fp;
-    break;
-  }
-
-  case MachineOperand::MO_MachineBasicBlock:
-    O << *MO.getMBB()->getSymbol();
-    return;
-
-  case MachineOperand::MO_GlobalAddress:
-    O << *Mang->getSymbol(MO.getGlobal());
-    break;
-
-  case MachineOperand::MO_ExternalSymbol:
-    O << *GetExternalSymbolSymbol(MO.getSymbolName());
-    break;
-
-  case MachineOperand::MO_JumpTableIndex:
-    O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
-      << '_' << MO.getIndex();
-    break;
-
-  case MachineOperand::MO_ConstantPoolIndex:
-    O << MAI->getPrivateGlobalPrefix() << "CPI"
-      << getFunctionNumber() << "_" << MO.getIndex();
-    if (MO.getOffset())
-      O << "+" << MO.getOffset();
-    break;
-
-  default:
-    llvm_unreachable("<unknown operand type>");
-  }
-}
-
-void MBlazeAsmPrinter::printUnsignedImm(const MachineInstr *MI, int opNum,
-                                        raw_ostream &O) {
-  const MachineOperand &MO = MI->getOperand(opNum);
-  if (MO.isImm())
-    O << (uint32_t)MO.getImm();
-  else
-    printOperand(MI, opNum, O);
-}
-
-void MBlazeAsmPrinter::printFSLImm(const MachineInstr *MI, int opNum,
-                                   raw_ostream &O) {
-  const MachineOperand &MO = MI->getOperand(opNum);
-  if (MO.isImm())
-    O << "rfsl" << (unsigned int)MO.getImm();
-  else
-    printOperand(MI, opNum, O);
-}
-
-void MBlazeAsmPrinter::
-printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
-                const char *Modifier) {
-  printOperand(MI, opNum, O);
-  O << ", ";
-  printOperand(MI, opNum+1, O);
-}
-
-/// isBlockOnlyReachableByFallthough - Return true if the basic block has
-/// exactly one predecessor and the control transfer mechanism between
-/// the predecessor and this block is a fall-through.
-bool MBlazeAsmPrinter::
-isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const {
-  // If this is a landing pad, it isn't a fall through.  If it has no preds,
-  // then nothing falls through to it.
-  if (MBB->isLandingPad() || MBB->pred_empty())
-    return false;
-
-  // If there isn't exactly one predecessor, it can't be a fall through.
-  MachineBasicBlock::const_pred_iterator PI = MBB->pred_begin(), PI2 = PI;
-  ++PI2;
-  if (PI2 != MBB->pred_end())
-    return false;
-
-  // The predecessor has to be immediately before this block.
-  const MachineBasicBlock *Pred = *PI;
-
-  if (!Pred->isLayoutSuccessor(MBB))
-    return false;
-
-  // If the block is completely empty, then it definitely does fall through.
-  if (Pred->empty())
-    return true;
-
-  // Check if the last terminator is an unconditional branch.
-  MachineBasicBlock::const_iterator I = Pred->end();
-  while (I != Pred->begin() && !(--I)->isTerminator())
-    ; // Noop
-  return I == Pred->end() || !I->isBarrier();
-}
-
-// Force static initialization.
-extern "C" void LLVMInitializeMBlazeAsmPrinter() {
-  RegisterAsmPrinter<MBlazeAsmPrinter> X(TheMBlazeTarget);
-}