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, 297 deletions

diff --git a/lib/Target/MBlaze/MBlazeInstrInfo.cpp b/lib/Target/MBlaze/MBlazeInstrInfo.cpp
deleted file mode 100644
index ab069e6..0000000
--- a/lib/Target/MBlaze/MBlazeInstrInfo.cpp
+++ /dev/null
@@ -1,297 +0,0 @@
-//===-- MBlazeInstrInfo.cpp - MBlaze Instruction Information --------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains the MBlaze implementation of the TargetInstrInfo class.
-//
-//===----------------------------------------------------------------------===//
-
-#include "MBlazeInstrInfo.h"
-#include "MBlazeMachineFunction.h"
-#include "MBlazeTargetMachine.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/ScoreboardHazardRecognizer.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/TargetRegistry.h"
-
-#define GET_INSTRINFO_CTOR
-#include "MBlazeGenInstrInfo.inc"
-
-using namespace llvm;
-
-MBlazeInstrInfo::MBlazeInstrInfo(MBlazeTargetMachine &tm)
-  : MBlazeGenInstrInfo(MBlaze::ADJCALLSTACKDOWN, MBlaze::ADJCALLSTACKUP),
-    TM(tm), RI(*TM.getSubtargetImpl()) {}
-
-static bool isZeroImm(const MachineOperand &op) {
-  return op.isImm() && op.getImm() == 0;
-}
-
-/// isLoadFromStackSlot - If the specified machine instruction is a direct
-/// load from a stack slot, return the virtual or physical register number of
-/// the destination along with the FrameIndex of the loaded stack slot.  If
-/// not, return 0.  This predicate must return 0 if the instruction has
-/// any side effects other than loading from the stack slot.
-unsigned MBlazeInstrInfo::
-isLoadFromStackSlot(const MachineInstr *MI, int &FrameIndex) const {
-  if (MI->getOpcode() == MBlaze::LWI) {
-    if ((MI->getOperand(1).isFI()) && // is a stack slot
-        (MI->getOperand(2).isImm()) &&  // the imm is zero
-        (isZeroImm(MI->getOperand(2)))) {
-      FrameIndex = MI->getOperand(1).getIndex();
-      return MI->getOperand(0).getReg();
-    }
-  }
-
-  return 0;
-}
-
-/// isStoreToStackSlot - If the specified machine instruction is a direct
-/// store to a stack slot, return the virtual or physical register number of
-/// the source reg along with the FrameIndex of the loaded stack slot.  If
-/// not, return 0.  This predicate must return 0 if the instruction has
-/// any side effects other than storing to the stack slot.
-unsigned MBlazeInstrInfo::
-isStoreToStackSlot(const MachineInstr *MI, int &FrameIndex) const {
-  if (MI->getOpcode() == MBlaze::SWI) {
-    if ((MI->getOperand(1).isFI()) && // is a stack slot
-        (MI->getOperand(2).isImm()) &&  // the imm is zero
-        (isZeroImm(MI->getOperand(2)))) {
-      FrameIndex = MI->getOperand(1).getIndex();
-      return MI->getOperand(0).getReg();
-    }
-  }
-  return 0;
-}
-
-/// insertNoop - If data hazard condition is found insert the target nop
-/// instruction.
-void MBlazeInstrInfo::
-insertNoop(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const {
-  DebugLoc DL;
-  BuildMI(MBB, MI, DL, get(MBlaze::NOP));
-}
-
-void MBlazeInstrInfo::
-copyPhysReg(MachineBasicBlock &MBB,
-            MachineBasicBlock::iterator I, DebugLoc DL,
-            unsigned DestReg, unsigned SrcReg,
-            bool KillSrc) const {
-  llvm::BuildMI(MBB, I, DL, get(MBlaze::ADDK), DestReg)
-    .addReg(SrcReg, getKillRegState(KillSrc)).addReg(MBlaze::R0);
-}
-
-void MBlazeInstrInfo::
-storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                    unsigned SrcReg, bool isKill, int FI,
-                    const TargetRegisterClass *RC,
-                    const TargetRegisterInfo *TRI) const {
-  DebugLoc DL;
-  BuildMI(MBB, I, DL, get(MBlaze::SWI)).addReg(SrcReg,getKillRegState(isKill))
-    .addFrameIndex(FI).addImm(0); //.addFrameIndex(FI);
-}
-
-void MBlazeInstrInfo::
-loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                     unsigned DestReg, int FI,
-                     const TargetRegisterClass *RC,
-                     const TargetRegisterInfo *TRI) const {
-  DebugLoc DL;
-  BuildMI(MBB, I, DL, get(MBlaze::LWI), DestReg)
-      .addFrameIndex(FI).addImm(0); //.addFrameIndex(FI);
-}
-
-//===----------------------------------------------------------------------===//
-// Branch Analysis
-//===----------------------------------------------------------------------===//
-bool MBlazeInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,
-                                    MachineBasicBlock *&TBB,
-                                    MachineBasicBlock *&FBB,
-                                    SmallVectorImpl<MachineOperand> &Cond,
-                                    bool AllowModify) const {
-  // If the block has no terminators, it just falls into the block after it.
-  MachineBasicBlock::iterator I = MBB.end();
-  if (I == MBB.begin())
-    return false;
-  --I;
-  while (I->isDebugValue()) {
-    if (I == MBB.begin())
-      return false;
-    --I;
-  }
-  if (!isUnpredicatedTerminator(I))
-    return false;
-
-  // Get the last instruction in the block.
-  MachineInstr *LastInst = I;
-
-  // If there is only one terminator instruction, process it.
-  unsigned LastOpc = LastInst->getOpcode();
-  if (I == MBB.begin() || !isUnpredicatedTerminator(--I)) {
-    if (MBlaze::isUncondBranchOpcode(LastOpc)) {
-      TBB = LastInst->getOperand(0).getMBB();
-      return false;
-    }
-    if (MBlaze::isCondBranchOpcode(LastOpc)) {
-      // Block ends with fall-through condbranch.
-      TBB = LastInst->getOperand(1).getMBB();
-      Cond.push_back(MachineOperand::CreateImm(LastInst->getOpcode()));
-      Cond.push_back(LastInst->getOperand(0));
-      return false;
-    }
-    // Otherwise, don't know what this is.
-    return true;
-  }
-
-  // Get the instruction before it if it's a terminator.
-  MachineInstr *SecondLastInst = I;
-
-  // If there are three terminators, we don't know what sort of block this is.
-  if (SecondLastInst && I != MBB.begin() && isUnpredicatedTerminator(--I))
-    return true;
-
-  // If the block ends with something like BEQID then BRID, handle it.
-  if (MBlaze::isCondBranchOpcode(SecondLastInst->getOpcode()) &&
-      MBlaze::isUncondBranchOpcode(LastInst->getOpcode())) {
-    TBB = SecondLastInst->getOperand(1).getMBB();
-    Cond.push_back(MachineOperand::CreateImm(SecondLastInst->getOpcode()));
-    Cond.push_back(SecondLastInst->getOperand(0));
-    FBB = LastInst->getOperand(0).getMBB();
-    return false;
-  }
-
-  // If the block ends with two unconditional branches, handle it.
-  // The second one is not executed, so remove it.
-  if (MBlaze::isUncondBranchOpcode(SecondLastInst->getOpcode()) &&
-      MBlaze::isUncondBranchOpcode(LastInst->getOpcode())) {
-    TBB = SecondLastInst->getOperand(0).getMBB();
-    I = LastInst;
-    if (AllowModify)
-      I->eraseFromParent();
-    return false;
-  }
-
-  // Otherwise, can't handle this.
-  return true;
-}
-
-unsigned MBlazeInstrInfo::
-InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
-             MachineBasicBlock *FBB,
-             const SmallVectorImpl<MachineOperand> &Cond,
-             DebugLoc DL) const {
-  // Shouldn't be a fall through.
-  assert(TBB && "InsertBranch must not be told to insert a fallthrough");
-  assert((Cond.size() == 2 || Cond.size() == 0) &&
-         "MBlaze branch conditions have two components!");
-
-  unsigned Opc = MBlaze::BRID;
-  if (!Cond.empty())
-    Opc = (unsigned)Cond[0].getImm();
-
-  if (FBB == 0) {
-    if (Cond.empty()) // Unconditional branch
-      BuildMI(&MBB, DL, get(Opc)).addMBB(TBB);
-    else              // Conditional branch
-      BuildMI(&MBB, DL, get(Opc)).addReg(Cond[1].getReg()).addMBB(TBB);
-    return 1;
-  }
-
-  BuildMI(&MBB, DL, get(Opc)).addReg(Cond[1].getReg()).addMBB(TBB);
-  BuildMI(&MBB, DL, get(MBlaze::BRID)).addMBB(FBB);
-  return 2;
-}
-
-unsigned MBlazeInstrInfo::RemoveBranch(MachineBasicBlock &MBB) const {
-  MachineBasicBlock::iterator I = MBB.end();
-  if (I == MBB.begin()) return 0;
-  --I;
-  while (I->isDebugValue()) {
-    if (I == MBB.begin())
-      return 0;
-    --I;
-  }
-
-  if (!MBlaze::isUncondBranchOpcode(I->getOpcode()) &&
-      !MBlaze::isCondBranchOpcode(I->getOpcode()))
-    return 0;
-
-  // Remove the branch.
-  I->eraseFromParent();
-
-  I = MBB.end();
-
-  if (I == MBB.begin()) return 1;
-  --I;
-  if (!MBlaze::isCondBranchOpcode(I->getOpcode()))
-    return 1;
-
-  // Remove the branch.
-  I->eraseFromParent();
-  return 2;
-}
-
-bool MBlazeInstrInfo::ReverseBranchCondition(SmallVectorImpl<MachineOperand>
-                                               &Cond) const {
-  assert(Cond.size() == 2 && "Invalid MBlaze branch opcode!");
-  switch (Cond[0].getImm()) {
-  default:            return true;
-  case MBlaze::BEQ:   Cond[0].setImm(MBlaze::BNE); return false;
-  case MBlaze::BNE:   Cond[0].setImm(MBlaze::BEQ); return false;
-  case MBlaze::BGT:   Cond[0].setImm(MBlaze::BLE); return false;
-  case MBlaze::BGE:   Cond[0].setImm(MBlaze::BLT); return false;
-  case MBlaze::BLT:   Cond[0].setImm(MBlaze::BGE); return false;
-  case MBlaze::BLE:   Cond[0].setImm(MBlaze::BGT); return false;
-  case MBlaze::BEQI:  Cond[0].setImm(MBlaze::BNEI); return false;
-  case MBlaze::BNEI:  Cond[0].setImm(MBlaze::BEQI); return false;
-  case MBlaze::BGTI:  Cond[0].setImm(MBlaze::BLEI); return false;
-  case MBlaze::BGEI:  Cond[0].setImm(MBlaze::BLTI); return false;
-  case MBlaze::BLTI:  Cond[0].setImm(MBlaze::BGEI); return false;
-  case MBlaze::BLEI:  Cond[0].setImm(MBlaze::BGTI); return false;
-  case MBlaze::BEQD:  Cond[0].setImm(MBlaze::BNED); return false;
-  case MBlaze::BNED:  Cond[0].setImm(MBlaze::BEQD); return false;
-  case MBlaze::BGTD:  Cond[0].setImm(MBlaze::BLED); return false;
-  case MBlaze::BGED:  Cond[0].setImm(MBlaze::BLTD); return false;
-  case MBlaze::BLTD:  Cond[0].setImm(MBlaze::BGED); return false;
-  case MBlaze::BLED:  Cond[0].setImm(MBlaze::BGTD); return false;
-  case MBlaze::BEQID: Cond[0].setImm(MBlaze::BNEID); return false;
-  case MBlaze::BNEID: Cond[0].setImm(MBlaze::BEQID); return false;
-  case MBlaze::BGTID: Cond[0].setImm(MBlaze::BLEID); return false;
-  case MBlaze::BGEID: Cond[0].setImm(MBlaze::BLTID); return false;
-  case MBlaze::BLTID: Cond[0].setImm(MBlaze::BGEID); return false;
-  case MBlaze::BLEID: Cond[0].setImm(MBlaze::BGTID); return false;
-  }
-}
-
-/// getGlobalBaseReg - Return a virtual register initialized with the
-/// the global base register value. Output instructions required to
-/// initialize the register in the function entry block, if necessary.
-///
-unsigned MBlazeInstrInfo::getGlobalBaseReg(MachineFunction *MF) const {
-  MBlazeFunctionInfo *MBlazeFI = MF->getInfo<MBlazeFunctionInfo>();
-  unsigned GlobalBaseReg = MBlazeFI->getGlobalBaseReg();
-  if (GlobalBaseReg != 0)
-    return GlobalBaseReg;
-
-  // Insert the set of GlobalBaseReg into the first MBB of the function
-  MachineBasicBlock &FirstMBB = MF->front();
-  MachineBasicBlock::iterator MBBI = FirstMBB.begin();
-  MachineRegisterInfo &RegInfo = MF->getRegInfo();
-  const TargetInstrInfo *TII = MF->getTarget().getInstrInfo();
-
-  GlobalBaseReg = RegInfo.createVirtualRegister(&MBlaze::GPRRegClass);
-  BuildMI(FirstMBB, MBBI, DebugLoc(), TII->get(TargetOpcode::COPY),
-          GlobalBaseReg).addReg(MBlaze::R20);
-  RegInfo.addLiveIn(MBlaze::R20);
-
-  MBlazeFI->setGlobalBaseReg(GlobalBaseReg);
-  return GlobalBaseReg;
-}