MachineInstr.cpp revision 69de1932b350d7cdfc0ed1f4198d6f78c7822a02
1e138b3dd1ff02d826233482831318708a166ed93Chris Lattner//===-- lib/CodeGen/MachineInstr.cpp --------------------------------------===//
2edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman//
3b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell//                     The LLVM Compiler Infrastructure
4b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell//
54ee451de366474b9c228b4e5fa573795a715216dChris Lattner// This file is distributed under the University of Illinois Open Source
64ee451de366474b9c228b4e5fa573795a715216dChris Lattner// License. See LICENSE.TXT for details.
7edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman//
8b576c94c15af9a440f69d9d03c2afead7971118cJohn Criswell//===----------------------------------------------------------------------===//
921326fc2ad47ee7e73a8c0b03a4a0cc0b0a0c4e8Brian Gaeke//
1021326fc2ad47ee7e73a8c0b03a4a0cc0b0a0c4e8Brian Gaeke// Methods common to all machine instructions.
1121326fc2ad47ee7e73a8c0b03a4a0cc0b0a0c4e8Brian Gaeke//
12035dfbe7f2d109008d2d62d9f2a67efb477a7ab6Chris Lattner//===----------------------------------------------------------------------===//
1370bc4b5d1a3795a8f41be96723cfcbccac8e1671Vikram S. Adve
14822b4fb896846b87dd11a330ae13f2239329aeefChris Lattner#include "llvm/CodeGen/MachineInstr.h"
1584bc5427d6883f73cfeae3da640acd011d35c006Chris Lattner#include "llvm/Value.h"
168517e1f0beea9b5e47974f083396d53294c390adChris Lattner#include "llvm/CodeGen/MachineFunction.h"
1762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner#include "llvm/CodeGen/MachineRegisterInfo.h"
1869de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman#include "llvm/CodeGen/PseudoSourceValue.h"
1969de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman#include "llvm/CodeGen/SelectionDAGNodes.h"
201049164aa6b06d91d9b3b557a9a213eaf3f6319aChris Lattner#include "llvm/Target/TargetMachine.h"
21bb81d97feb396a8bb21d074db1c57e9f66525f40Evan Cheng#include "llvm/Target/TargetInstrInfo.h"
22f14cf85e334ff03bbdd23e473f14ffa4fb025e94Chris Lattner#include "llvm/Target/TargetInstrDesc.h"
232a79a0927c479b69316aa275c1f79c74d20e8040Chris Lattner#include "llvm/Target/MRegisterInfo.h"
24551ccae044b0ff658fe629dd67edd5ffe75d10e8Reid Spencer#include "llvm/Support/LeakDetector.h"
25a09362eb975730ac624c0bd210a95655ee105296Bill Wendling#include "llvm/Support/Streams.h"
26c21c5eeb4f56f160e79522df2d3aab5cfe73c05dJeff Cohen#include <ostream>
270742b59913a7760eb26f08121cd244a37e83e3b3Chris Lattnerusing namespace llvm;
28d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke
29f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner//===----------------------------------------------------------------------===//
30f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner// MachineOperand Implementation
31f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner//===----------------------------------------------------------------------===//
32f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner
3362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// AddRegOperandToRegInfo - Add this register operand to the specified
3462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// MachineRegisterInfo.  If it is null, then the next/prev fields should be
3562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// explicitly nulled out.
3662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattnervoid MachineOperand::AddRegOperandToRegInfo(MachineRegisterInfo *RegInfo) {
3762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  assert(isReg() && "Can only add reg operand to use lists");
3862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
3962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // If the reginfo pointer is null, just explicitly null out or next/prev
4062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // pointers, to ensure they are not garbage.
4162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  if (RegInfo == 0) {
4262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    Contents.Reg.Prev = 0;
4362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    Contents.Reg.Next = 0;
4462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    return;
4562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  }
4662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
4762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // Otherwise, add this operand to the head of the registers use/def list.
4880fe5311b5e9e5c4642ff46ba2377173c17797f6Chris Lattner  MachineOperand **Head = &RegInfo->getRegUseDefListHead(getReg());
4962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
5080fe5311b5e9e5c4642ff46ba2377173c17797f6Chris Lattner  // For SSA values, we prefer to keep the definition at the start of the list.
5180fe5311b5e9e5c4642ff46ba2377173c17797f6Chris Lattner  // we do this by skipping over the definition if it is at the head of the
5280fe5311b5e9e5c4642ff46ba2377173c17797f6Chris Lattner  // list.
5380fe5311b5e9e5c4642ff46ba2377173c17797f6Chris Lattner  if (*Head && (*Head)->isDef())
5480fe5311b5e9e5c4642ff46ba2377173c17797f6Chris Lattner    Head = &(*Head)->Contents.Reg.Next;
5580fe5311b5e9e5c4642ff46ba2377173c17797f6Chris Lattner
5680fe5311b5e9e5c4642ff46ba2377173c17797f6Chris Lattner  Contents.Reg.Next = *Head;
5762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  if (Contents.Reg.Next) {
5862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    assert(getReg() == Contents.Reg.Next->getReg() &&
5962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner           "Different regs on the same list!");
6062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    Contents.Reg.Next->Contents.Reg.Prev = &Contents.Reg.Next;
6162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  }
6262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
6380fe5311b5e9e5c4642ff46ba2377173c17797f6Chris Lattner  Contents.Reg.Prev = Head;
6480fe5311b5e9e5c4642ff46ba2377173c17797f6Chris Lattner  *Head = this;
6562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner}
6662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
6762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattnervoid MachineOperand::setReg(unsigned Reg) {
6862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  if (getReg() == Reg) return; // No change.
6962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
7062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // Otherwise, we have to change the register.  If this operand is embedded
7162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // into a machine function, we need to update the old and new register's
7262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // use/def lists.
7362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  if (MachineInstr *MI = getParent())
7462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    if (MachineBasicBlock *MBB = MI->getParent())
7562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      if (MachineFunction *MF = MBB->getParent()) {
7662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner        RemoveRegOperandFromRegInfo();
7762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner        Contents.Reg.RegNo = Reg;
7862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner        AddRegOperandToRegInfo(&MF->getRegInfo());
7962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner        return;
8062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      }
8162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
8262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // Otherwise, just change the register, no problem.  :)
8362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  Contents.Reg.RegNo = Reg;
8462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner}
8562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
8662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// ChangeToImmediate - Replace this operand with a new immediate operand of
8762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// the specified value.  If an operand is known to be an immediate already,
8862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// the setImm method should be used.
8962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattnervoid MachineOperand::ChangeToImmediate(int64_t ImmVal) {
9062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // If this operand is currently a register operand, and if this is in a
9162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // function, deregister the operand from the register's use/def list.
9262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  if (isReg() && getParent() && getParent()->getParent() &&
9362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      getParent()->getParent()->getParent())
9462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    RemoveRegOperandFromRegInfo();
9562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
9662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  OpKind = MO_Immediate;
9762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  Contents.ImmVal = ImmVal;
9862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner}
9962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
10062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// ChangeToRegister - Replace this operand with a new register operand of
10162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// the specified value.  If an operand is known to be an register already,
10262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// the setReg method should be used.
10362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattnervoid MachineOperand::ChangeToRegister(unsigned Reg, bool isDef, bool isImp,
10462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner                                      bool isKill, bool isDead) {
10562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // If this operand is already a register operand, use setReg to update the
10662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // register's use/def lists.
10762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  if (isReg()) {
10862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    setReg(Reg);
10962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  } else {
11062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // Otherwise, change this to a register and set the reg#.
11162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    OpKind = MO_Register;
11262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    Contents.Reg.RegNo = Reg;
11362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
11462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // If this operand is embedded in a function, add the operand to the
11562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // register's use/def list.
11662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    if (MachineInstr *MI = getParent())
11762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      if (MachineBasicBlock *MBB = MI->getParent())
11862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner        if (MachineFunction *MF = MBB->getParent())
11962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner          AddRegOperandToRegInfo(&MF->getRegInfo());
12062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  }
12162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
12262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  IsDef = isDef;
12362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  IsImp = isImp;
12462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  IsKill = isKill;
12562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  IsDead = isDead;
12662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  SubReg = 0;
12762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner}
12862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
129f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner/// isIdenticalTo - Return true if this operand is identical to the specified
130f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner/// operand.
131f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattnerbool MachineOperand::isIdenticalTo(const MachineOperand &Other) const {
132f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  if (getType() != Other.getType()) return false;
133f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner
134f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  switch (getType()) {
135f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  default: assert(0 && "Unrecognized operand type");
136f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_Register:
137f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    return getReg() == Other.getReg() && isDef() == Other.isDef() &&
138f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner           getSubReg() == Other.getSubReg();
139f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_Immediate:
140f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    return getImm() == Other.getImm();
141f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_MachineBasicBlock:
142f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    return getMBB() == Other.getMBB();
143f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_FrameIndex:
1448aa797aa51cd4ea1ec6f46f4891a6897944b75b2Chris Lattner    return getIndex() == Other.getIndex();
145f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_ConstantPoolIndex:
1468aa797aa51cd4ea1ec6f46f4891a6897944b75b2Chris Lattner    return getIndex() == Other.getIndex() && getOffset() == Other.getOffset();
147f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_JumpTableIndex:
1488aa797aa51cd4ea1ec6f46f4891a6897944b75b2Chris Lattner    return getIndex() == Other.getIndex();
149f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_GlobalAddress:
150f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    return getGlobal() == Other.getGlobal() && getOffset() == Other.getOffset();
151f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_ExternalSymbol:
152f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    return !strcmp(getSymbolName(), Other.getSymbolName()) &&
153f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner           getOffset() == Other.getOffset();
154f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  }
155f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner}
156f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner
157f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner/// print - Print the specified machine operand.
158f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner///
159f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattnervoid MachineOperand::print(std::ostream &OS, const TargetMachine *TM) const {
160f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  switch (getType()) {
161f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_Register:
162f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    if (getReg() == 0 || MRegisterInfo::isVirtualRegister(getReg())) {
163f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner      OS << "%reg" << getReg();
164f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    } else {
165f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner      // If the instruction is embedded into a basic block, we can find the
16662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      // target info for the instruction.
167f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner      if (TM == 0)
168f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner        if (const MachineInstr *MI = getParent())
169f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner          if (const MachineBasicBlock *MBB = MI->getParent())
170f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner            if (const MachineFunction *MF = MBB->getParent())
171f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner              TM = &MF->getTarget();
172f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner
173f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner      if (TM)
174f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner        OS << "%" << TM->getRegisterInfo()->get(getReg()).Name;
175f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner      else
176f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner        OS << "%mreg" << getReg();
177f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    }
178f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner
179f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    if (isDef() || isKill() || isDead() || isImplicit()) {
180f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner      OS << "<";
181f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner      bool NeedComma = false;
182f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner      if (isImplicit()) {
183f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner        OS << (isDef() ? "imp-def" : "imp-use");
184f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner        NeedComma = true;
185f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner      } else if (isDef()) {
186f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner        OS << "def";
187f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner        NeedComma = true;
188f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner      }
189f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner      if (isKill() || isDead()) {
190f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner        if (NeedComma)    OS << ",";
191f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner        if (isKill()) OS << "kill";
192f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner        if (isDead()) OS << "dead";
193f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner      }
194f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner      OS << ">";
195f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    }
196f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    break;
197f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_Immediate:
198f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    OS << getImm();
199f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    break;
200f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_MachineBasicBlock:
201f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    OS << "mbb<"
2028aa797aa51cd4ea1ec6f46f4891a6897944b75b2Chris Lattner       << ((Value*)getMBB()->getBasicBlock())->getName()
2038aa797aa51cd4ea1ec6f46f4891a6897944b75b2Chris Lattner       << "," << (void*)getMBB() << ">";
204f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    break;
205f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_FrameIndex:
2068aa797aa51cd4ea1ec6f46f4891a6897944b75b2Chris Lattner    OS << "<fi#" << getIndex() << ">";
207f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    break;
208f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_ConstantPoolIndex:
2098aa797aa51cd4ea1ec6f46f4891a6897944b75b2Chris Lattner    OS << "<cp#" << getIndex();
210f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    if (getOffset()) OS << "+" << getOffset();
211f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    OS << ">";
212f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    break;
213f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_JumpTableIndex:
2148aa797aa51cd4ea1ec6f46f4891a6897944b75b2Chris Lattner    OS << "<jt#" << getIndex() << ">";
215f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    break;
216f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_GlobalAddress:
217f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    OS << "<ga:" << ((Value*)getGlobal())->getName();
218f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    if (getOffset()) OS << "+" << getOffset();
219f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    OS << ">";
220f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    break;
221f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  case MachineOperand::MO_ExternalSymbol:
222f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    OS << "<es:" << getSymbolName();
223f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    if (getOffset()) OS << "+" << getOffset();
224f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    OS << ">";
225f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    break;
226f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  default:
227f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    assert(0 && "Unrecognized operand type");
228f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner  }
229f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner}
230f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner
231f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner//===----------------------------------------------------------------------===//
232f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner// MachineInstr Implementation
233f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner//===----------------------------------------------------------------------===//
234f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner
235c0f64ffab93d11fb27a3b8a0707b77400918a20eEvan Cheng/// MachineInstr ctor - This constructor creates a dummy MachineInstr with
23667f660cb080965ea93ed6d7265a67100f2fe38e4Evan Cheng/// TID NULL and no operands.
237c0f64ffab93d11fb27a3b8a0707b77400918a20eEvan ChengMachineInstr::MachineInstr()
238f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner  : TID(0), NumImplicitOps(0), Parent(0) {
239aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos  // Make sure that we get added to a machine basicblock
240aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos  LeakDetector::addGarbageObject(this);
2417279122e668816bed0d4f38d3392bbab0140fad0Chris Lattner}
2427279122e668816bed0d4f38d3392bbab0140fad0Chris Lattner
24367f660cb080965ea93ed6d7265a67100f2fe38e4Evan Chengvoid MachineInstr::addImplicitDefUseOperands() {
24467f660cb080965ea93ed6d7265a67100f2fe38e4Evan Cheng  if (TID->ImplicitDefs)
245a4161ee99478e7f8f9e33481e1c0dc79f0b4bd7dChris Lattner    for (const unsigned *ImpDefs = TID->ImplicitDefs; *ImpDefs; ++ImpDefs)
2468019f41c0b7fda031d494e3900eada7d4e494772Chris Lattner      addOperand(MachineOperand::CreateReg(*ImpDefs, true, true));
24767f660cb080965ea93ed6d7265a67100f2fe38e4Evan Cheng  if (TID->ImplicitUses)
248a4161ee99478e7f8f9e33481e1c0dc79f0b4bd7dChris Lattner    for (const unsigned *ImpUses = TID->ImplicitUses; *ImpUses; ++ImpUses)
2498019f41c0b7fda031d494e3900eada7d4e494772Chris Lattner      addOperand(MachineOperand::CreateReg(*ImpUses, false, true));
250d7de496b23fca8145f777a56281457bf64e8bbadEvan Cheng}
251d7de496b23fca8145f777a56281457bf64e8bbadEvan Cheng
252d7de496b23fca8145f777a56281457bf64e8bbadEvan Cheng/// MachineInstr ctor - This constructor create a MachineInstr and add the
253c0f64ffab93d11fb27a3b8a0707b77400918a20eEvan Cheng/// implicit operands. It reserves space for number of operands specified by
254749c6f6b5ed301c84aac562e414486549d7b98ebChris Lattner/// TargetInstrDesc or the numOperands if it is not zero. (for
255c0f64ffab93d11fb27a3b8a0707b77400918a20eEvan Cheng/// instructions with variable number of operands).
256749c6f6b5ed301c84aac562e414486549d7b98ebChris LattnerMachineInstr::MachineInstr(const TargetInstrDesc &tid, bool NoImp)
257f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner  : TID(&tid), NumImplicitOps(0), Parent(0) {
258349c4952009525b27383e2120a6b3c998f39bd09Chris Lattner  if (!NoImp && TID->getImplicitDefs())
259349c4952009525b27383e2120a6b3c998f39bd09Chris Lattner    for (const unsigned *ImpDefs = TID->getImplicitDefs(); *ImpDefs; ++ImpDefs)
260d7de496b23fca8145f777a56281457bf64e8bbadEvan Cheng      NumImplicitOps++;
261349c4952009525b27383e2120a6b3c998f39bd09Chris Lattner  if (!NoImp && TID->getImplicitUses())
262349c4952009525b27383e2120a6b3c998f39bd09Chris Lattner    for (const unsigned *ImpUses = TID->getImplicitUses(); *ImpUses; ++ImpUses)
263d7de496b23fca8145f777a56281457bf64e8bbadEvan Cheng      NumImplicitOps++;
264349c4952009525b27383e2120a6b3c998f39bd09Chris Lattner  Operands.reserve(NumImplicitOps + TID->getNumOperands());
265fa9457276a2174aaf302240dd32d89900ad021aeEvan Cheng  if (!NoImp)
266fa9457276a2174aaf302240dd32d89900ad021aeEvan Cheng    addImplicitDefUseOperands();
267d7de496b23fca8145f777a56281457bf64e8bbadEvan Cheng  // Make sure that we get added to a machine basicblock
268d7de496b23fca8145f777a56281457bf64e8bbadEvan Cheng  LeakDetector::addGarbageObject(this);
269d7de496b23fca8145f777a56281457bf64e8bbadEvan Cheng}
270d7de496b23fca8145f777a56281457bf64e8bbadEvan Cheng
271ddd7fcb887be752ec8167276a697994ad9cb9c4eChris Lattner/// MachineInstr ctor - Work exactly the same as the ctor above, except that the
272ddd7fcb887be752ec8167276a697994ad9cb9c4eChris Lattner/// MachineInstr is created and added to the end of the specified basic block.
273ddd7fcb887be752ec8167276a697994ad9cb9c4eChris Lattner///
274c0f64ffab93d11fb27a3b8a0707b77400918a20eEvan ChengMachineInstr::MachineInstr(MachineBasicBlock *MBB,
275749c6f6b5ed301c84aac562e414486549d7b98ebChris Lattner                           const TargetInstrDesc &tid)
276f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner  : TID(&tid), NumImplicitOps(0), Parent(0) {
277ddd7fcb887be752ec8167276a697994ad9cb9c4eChris Lattner  assert(MBB && "Cannot use inserting ctor with null basic block!");
27867f660cb080965ea93ed6d7265a67100f2fe38e4Evan Cheng  if (TID->ImplicitDefs)
279349c4952009525b27383e2120a6b3c998f39bd09Chris Lattner    for (const unsigned *ImpDefs = TID->getImplicitDefs(); *ImpDefs; ++ImpDefs)
280d7de496b23fca8145f777a56281457bf64e8bbadEvan Cheng      NumImplicitOps++;
28167f660cb080965ea93ed6d7265a67100f2fe38e4Evan Cheng  if (TID->ImplicitUses)
282349c4952009525b27383e2120a6b3c998f39bd09Chris Lattner    for (const unsigned *ImpUses = TID->getImplicitUses(); *ImpUses; ++ImpUses)
283d7de496b23fca8145f777a56281457bf64e8bbadEvan Cheng      NumImplicitOps++;
284349c4952009525b27383e2120a6b3c998f39bd09Chris Lattner  Operands.reserve(NumImplicitOps + TID->getNumOperands());
28567f660cb080965ea93ed6d7265a67100f2fe38e4Evan Cheng  addImplicitDefUseOperands();
286aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos  // Make sure that we get added to a machine basicblock
287aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos  LeakDetector::addGarbageObject(this);
288ddd7fcb887be752ec8167276a697994ad9cb9c4eChris Lattner  MBB->push_back(this);  // Add instruction to end of basic block!
289ddd7fcb887be752ec8167276a697994ad9cb9c4eChris Lattner}
290ddd7fcb887be752ec8167276a697994ad9cb9c4eChris Lattner
291ce22e76996d3ff0930716fa60c29df60a7e0481bMisha Brukman/// MachineInstr ctor - Copies MachineInstr arg exactly
292ce22e76996d3ff0930716fa60c29df60a7e0481bMisha Brukman///
293466b534a570f574ed485d875bbca8454f68dcb52Tanya LattnerMachineInstr::MachineInstr(const MachineInstr &MI) {
294749c6f6b5ed301c84aac562e414486549d7b98ebChris Lattner  TID = &MI.getDesc();
2956b2c05f3d3c7b44183c629485ade10c18b86828dEvan Cheng  NumImplicitOps = MI.NumImplicitOps;
296943b5e117fe9a087f9aa529a2632c2d32cc22374Chris Lattner  Operands.reserve(MI.getNumOperands());
29769de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman  MemOperands = MI.MemOperands;
298b5159ed0cb7943e5938782f7693beb18342165ceTanya Lattner
299ce22e76996d3ff0930716fa60c29df60a7e0481bMisha Brukman  // Add operands
300e12d6abfdfc5141b2001f0c369a0e1525315b9c0Chris Lattner  for (unsigned i = 0; i != MI.getNumOperands(); ++i) {
301943b5e117fe9a087f9aa529a2632c2d32cc22374Chris Lattner    Operands.push_back(MI.getOperand(i));
302e12d6abfdfc5141b2001f0c369a0e1525315b9c0Chris Lattner    Operands.back().ParentMI = this;
303e12d6abfdfc5141b2001f0c369a0e1525315b9c0Chris Lattner  }
3040c63e03e04d3982e1913479bba404c3debc9a27eTanya Lattner
305ce22e76996d3ff0930716fa60c29df60a7e0481bMisha Brukman  // Set parent, next, and prev to null
306f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner  Parent = 0;
307f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner  Prev = 0;
308f20c1a497fe3922ac718429d65a5fe396890575eChris Lattner  Next = 0;
309466b534a570f574ed485d875bbca8454f68dcb52Tanya Lattner}
310466b534a570f574ed485d875bbca8454f68dcb52Tanya Lattner
311466b534a570f574ed485d875bbca8454f68dcb52Tanya Lattner
312ce22e76996d3ff0930716fa60c29df60a7e0481bMisha BrukmanMachineInstr::~MachineInstr() {
313aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos  LeakDetector::removeGarbageObject(this);
314e12d6abfdfc5141b2001f0c369a0e1525315b9c0Chris Lattner#ifndef NDEBUG
31562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  for (unsigned i = 0, e = Operands.size(); i != e; ++i) {
316e12d6abfdfc5141b2001f0c369a0e1525315b9c0Chris Lattner    assert(Operands[i].ParentMI == this && "ParentMI mismatch!");
31762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    assert((!Operands[i].isReg() || !Operands[i].isOnRegUseList()) &&
31862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner           "Reg operand def/use list corrupted");
31962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  }
320e12d6abfdfc5141b2001f0c369a0e1525315b9c0Chris Lattner#endif
321aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos}
322aad5c0505183a5b7913f1a443a1f0650122551ccAlkis Evlogimenos
32367f660cb080965ea93ed6d7265a67100f2fe38e4Evan Cheng/// getOpcode - Returns the opcode of this MachineInstr.
32467f660cb080965ea93ed6d7265a67100f2fe38e4Evan Cheng///
325cb648f90a26eb05ae8d508d500ca12881df50824Dan Gohmanint MachineInstr::getOpcode() const {
32667f660cb080965ea93ed6d7265a67100f2fe38e4Evan Cheng  return TID->Opcode;
32767f660cb080965ea93ed6d7265a67100f2fe38e4Evan Cheng}
32867f660cb080965ea93ed6d7265a67100f2fe38e4Evan Cheng
32962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// getRegInfo - If this instruction is embedded into a MachineFunction,
33062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// return the MachineRegisterInfo object for the current function, otherwise
33162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// return null.
33262ed6b9ade63bf01717ce5274fa11e93e873d245Chris LattnerMachineRegisterInfo *MachineInstr::getRegInfo() {
33362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  if (MachineBasicBlock *MBB = getParent())
33462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    if (MachineFunction *MF = MBB->getParent())
33562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      return &MF->getRegInfo();
33662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  return 0;
33762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner}
33862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
33962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// RemoveRegOperandsFromUseLists - Unlink all of the register operands in
34062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// this instruction from their respective use lists.  This requires that the
34162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// operands already be on their use lists.
34262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattnervoid MachineInstr::RemoveRegOperandsFromUseLists() {
34362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  for (unsigned i = 0, e = Operands.size(); i != e; ++i) {
34462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    if (Operands[i].isReg())
34562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      Operands[i].RemoveRegOperandFromRegInfo();
34662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  }
34762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner}
34862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
34962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// AddRegOperandsToUseLists - Add all of the register operands in
35062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// this instruction from their respective use lists.  This requires that the
35162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// operands not be on their use lists yet.
35262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattnervoid MachineInstr::AddRegOperandsToUseLists(MachineRegisterInfo &RegInfo) {
35362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  for (unsigned i = 0, e = Operands.size(); i != e; ++i) {
35462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    if (Operands[i].isReg())
35562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      Operands[i].AddRegOperandToRegInfo(&RegInfo);
35662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  }
35762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner}
35862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
35962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
36062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// addOperand - Add the specified operand to the instruction.  If it is an
36162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// implicit operand, it is added to the end of the operand list.  If it is
36262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// an explicit operand it is added at the end of the explicit operand list
36362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// (before the first implicit operand).
36462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattnervoid MachineInstr::addOperand(const MachineOperand &Op) {
36562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  bool isImpReg = Op.isReg() && Op.isImplicit();
36662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  assert((isImpReg || !OperandsComplete()) &&
36762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner         "Trying to add an operand to a machine instr that is already done!");
36862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
36962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // If we are adding the operand to the end of the list, our job is simpler.
37062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // This is true most of the time, so this is a reasonable optimization.
37162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  if (isImpReg || NumImplicitOps == 0) {
37262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // We can only do this optimization if we know that the operand list won't
37362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // reallocate.
37462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    if (Operands.empty() || Operands.size()+1 <= Operands.capacity()) {
37562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      Operands.push_back(Op);
37662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
37762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      // Set the parent of the operand.
37862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      Operands.back().ParentMI = this;
37962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
38062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      // If the operand is a register, update the operand's use list.
38162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      if (Op.isReg())
38262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner        Operands.back().AddRegOperandToRegInfo(getRegInfo());
38362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      return;
38462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    }
38562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  }
38662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
38762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // Otherwise, we have to insert a real operand before any implicit ones.
38862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  unsigned OpNo = Operands.size()-NumImplicitOps;
38962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
39062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  MachineRegisterInfo *RegInfo = getRegInfo();
39162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
39262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // If this instruction isn't embedded into a function, then we don't need to
39362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // update any operand lists.
39462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  if (RegInfo == 0) {
39562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // Simple insertion, no reginfo update needed for other register operands.
39662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    Operands.insert(Operands.begin()+OpNo, Op);
39762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    Operands[OpNo].ParentMI = this;
39862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
39962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // Do explicitly set the reginfo for this operand though, to ensure the
40062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // next/prev fields are properly nulled out.
40162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    if (Operands[OpNo].isReg())
40262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      Operands[OpNo].AddRegOperandToRegInfo(0);
40362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
40462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  } else if (Operands.size()+1 <= Operands.capacity()) {
40562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // Otherwise, we have to remove register operands from their register use
40662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // list, add the operand, then add the register operands back to their use
40762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // list.  This also must handle the case when the operand list reallocates
40862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // to somewhere else.
40962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
41062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // If insertion of this operand won't cause reallocation of the operand
41162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // list, just remove the implicit operands, add the operand, then re-add all
41262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // the rest of the operands.
41362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    for (unsigned i = OpNo, e = Operands.size(); i != e; ++i) {
41462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      assert(Operands[i].isReg() && "Should only be an implicit reg!");
41562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      Operands[i].RemoveRegOperandFromRegInfo();
41662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    }
41762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
41862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // Add the operand.  If it is a register, add it to the reg list.
41962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    Operands.insert(Operands.begin()+OpNo, Op);
42062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    Operands[OpNo].ParentMI = this;
42162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
42262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    if (Operands[OpNo].isReg())
42362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      Operands[OpNo].AddRegOperandToRegInfo(RegInfo);
42462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
42562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // Re-add all the implicit ops.
42662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    for (unsigned i = OpNo+1, e = Operands.size(); i != e; ++i) {
42762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      assert(Operands[i].isReg() && "Should only be an implicit reg!");
42862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      Operands[i].AddRegOperandToRegInfo(RegInfo);
42962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    }
43062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  } else {
43162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // Otherwise, we will be reallocating the operand list.  Remove all reg
43262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // operands from their list, then readd them after the operand list is
43362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // reallocated.
43462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    RemoveRegOperandsFromUseLists();
43562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
43662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    Operands.insert(Operands.begin()+OpNo, Op);
43762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    Operands[OpNo].ParentMI = this;
43862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
43962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // Re-add all the operands.
44062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    AddRegOperandsToUseLists(*RegInfo);
44162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  }
44262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner}
44362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
44462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// RemoveOperand - Erase an operand  from an instruction, leaving it with one
44562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner/// fewer operand than it started with.
44662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner///
44762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattnervoid MachineInstr::RemoveOperand(unsigned OpNo) {
44862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  assert(OpNo < Operands.size() && "Invalid operand number");
44962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
45062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // Special case removing the last one.
45162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  if (OpNo == Operands.size()-1) {
45262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    // If needed, remove from the reg def/use list.
45362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    if (Operands.back().isReg() && Operands.back().isOnRegUseList())
45462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      Operands.back().RemoveRegOperandFromRegInfo();
45562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
45662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    Operands.pop_back();
45762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    return;
45862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  }
45962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
46062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // Otherwise, we are removing an interior operand.  If we have reginfo to
46162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // update, remove all operands that will be shifted down from their reg lists,
46262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  // move everything down, then re-add them.
46362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  MachineRegisterInfo *RegInfo = getRegInfo();
46462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  if (RegInfo) {
46562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    for (unsigned i = OpNo, e = Operands.size(); i != e; ++i) {
46662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      if (Operands[i].isReg())
46762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner        Operands[i].RemoveRegOperandFromRegInfo();
46862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    }
46962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  }
47062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
47162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  Operands.erase(Operands.begin()+OpNo);
47262ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
47362ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  if (RegInfo) {
47462ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    for (unsigned i = OpNo, e = Operands.size(); i != e; ++i) {
47562ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner      if (Operands[i].isReg())
47662ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner        Operands[i].AddRegOperandToRegInfo(RegInfo);
47762ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner    }
47862ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner  }
47962ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner}
48062ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
48162ed6b9ade63bf01717ce5274fa11e93e873d245Chris Lattner
48248d7c069c76882475c23de153bda9483cd3c9bb4Chris Lattner/// removeFromParent - This method unlinks 'this' from the containing basic
48348d7c069c76882475c23de153bda9483cd3c9bb4Chris Lattner/// block, and returns it, but does not delete it.
48448d7c069c76882475c23de153bda9483cd3c9bb4Chris LattnerMachineInstr *MachineInstr::removeFromParent() {
48548d7c069c76882475c23de153bda9483cd3c9bb4Chris Lattner  assert(getParent() && "Not embedded in a basic block!");
48648d7c069c76882475c23de153bda9483cd3c9bb4Chris Lattner  getParent()->remove(this);
48748d7c069c76882475c23de153bda9483cd3c9bb4Chris Lattner  return this;
48848d7c069c76882475c23de153bda9483cd3c9bb4Chris Lattner}
48948d7c069c76882475c23de153bda9483cd3c9bb4Chris Lattner
49048d7c069c76882475c23de153bda9483cd3c9bb4Chris Lattner
49121326fc2ad47ee7e73a8c0b03a4a0cc0b0a0c4e8Brian Gaeke/// OperandComplete - Return true if it's illegal to add a new operand
49221326fc2ad47ee7e73a8c0b03a4a0cc0b0a0c4e8Brian Gaeke///
4932a90ba60175f93e7438165d8423100aa573c16c5Chris Lattnerbool MachineInstr::OperandsComplete() const {
494349c4952009525b27383e2120a6b3c998f39bd09Chris Lattner  unsigned short NumOperands = TID->getNumOperands();
4958f707e15fbd09ca948b86419bcb0c92470827ac9Chris Lattner  if (!TID->isVariadic() && getNumOperands()-NumImplicitOps >= NumOperands)
4963497782f3843007de3be0c43e3ff206a01e2ccacVikram S. Adve    return true;  // Broken: we have all the operands of this instruction!
497413746e9833d97a8b463ef6a788aa326cf3829a2Chris Lattner  return false;
49870bc4b5d1a3795a8f41be96723cfcbccac8e1671Vikram S. Adve}
49970bc4b5d1a3795a8f41be96723cfcbccac8e1671Vikram S. Adve
50019e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng/// getNumExplicitOperands - Returns the number of non-implicit operands.
50119e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng///
50219e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Chengunsigned MachineInstr::getNumExplicitOperands() const {
503349c4952009525b27383e2120a6b3c998f39bd09Chris Lattner  unsigned NumOperands = TID->getNumOperands();
5048f707e15fbd09ca948b86419bcb0c92470827ac9Chris Lattner  if (!TID->isVariadic())
50519e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng    return NumOperands;
50619e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng
50719e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng  for (unsigned e = getNumOperands(); NumOperands != e; ++NumOperands) {
50819e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng    const MachineOperand &MO = getOperand(NumOperands);
50919e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng    if (!MO.isRegister() || !MO.isImplicit())
51019e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng      NumOperands++;
51119e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng  }
51219e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng  return NumOperands;
51319e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng}
51419e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng
5158ace2cd034be10c09be51daf08c3dda327f54262Chris Lattner
516bb81d97feb396a8bb21d074db1c57e9f66525f40Evan Cheng/// isDebugLabel - Returns true if the MachineInstr represents a debug label.
517bb81d97feb396a8bb21d074db1c57e9f66525f40Evan Cheng///
518bb81d97feb396a8bb21d074db1c57e9f66525f40Evan Chengbool MachineInstr::isDebugLabel() const {
519bb81d97feb396a8bb21d074db1c57e9f66525f40Evan Cheng  return getOpcode() == TargetInstrInfo::LABEL && getOperand(1).getImm() == 0;
520bb81d97feb396a8bb21d074db1c57e9f66525f40Evan Cheng}
521bb81d97feb396a8bb21d074db1c57e9f66525f40Evan Cheng
522faa510726f4b40aa4495e60e4d341c6467e3fb01Evan Cheng/// findRegisterUseOperandIdx() - Returns the MachineOperand that is a use of
52332eb1f1ca4220d2f24916e587ad7e8574d7d82a1Evan Cheng/// the specific register or -1 if it is not found. It further tightening
52476d7e76c15c258ec4a71fd75a2a32bca3a5e5e27Evan Cheng/// the search criteria to a use that kills the register if isKill is true.
525f277ee4be7edabb759a7f78138b693d72d0c263fEvan Chengint MachineInstr::findRegisterUseOperandIdx(unsigned Reg, bool isKill) const {
526576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng  for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
527f277ee4be7edabb759a7f78138b693d72d0c263fEvan Cheng    const MachineOperand &MO = getOperand(i);
52892dfe2001e96f6e2b6d327e8816f38033f88b295Dan Gohman    if (MO.isRegister() && MO.isUse() && MO.getReg() == Reg)
52976d7e76c15c258ec4a71fd75a2a32bca3a5e5e27Evan Cheng      if (!isKill || MO.isKill())
53032eb1f1ca4220d2f24916e587ad7e8574d7d82a1Evan Cheng        return i;
531b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng  }
53232eb1f1ca4220d2f24916e587ad7e8574d7d82a1Evan Cheng  return -1;
533b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng}
534b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng
535b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng/// findRegisterDefOperand() - Returns the MachineOperand that is a def of
536b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng/// the specific register or NULL if it is not found.
537b371f457b0ea4a652a9f526ba4375c80ae542252Evan ChengMachineOperand *MachineInstr::findRegisterDefOperand(unsigned Reg) {
538b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng  for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
539b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng    MachineOperand &MO = getOperand(i);
54092dfe2001e96f6e2b6d327e8816f38033f88b295Dan Gohman    if (MO.isRegister() && MO.isDef() && MO.getReg() == Reg)
541576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng      return &MO;
542576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng  }
543576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng  return NULL;
544576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng}
54519e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng
546f277ee4be7edabb759a7f78138b693d72d0c263fEvan Cheng/// findFirstPredOperandIdx() - Find the index of the first operand in the
547f277ee4be7edabb759a7f78138b693d72d0c263fEvan Cheng/// operand list that is used to represent the predicate. It returns -1 if
548f277ee4be7edabb759a7f78138b693d72d0c263fEvan Cheng/// none is found.
549f277ee4be7edabb759a7f78138b693d72d0c263fEvan Chengint MachineInstr::findFirstPredOperandIdx() const {
550749c6f6b5ed301c84aac562e414486549d7b98ebChris Lattner  const TargetInstrDesc &TID = getDesc();
551749c6f6b5ed301c84aac562e414486549d7b98ebChris Lattner  if (TID.isPredicable()) {
55219e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng    for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
553749c6f6b5ed301c84aac562e414486549d7b98ebChris Lattner      if (TID.OpInfo[i].isPredicate())
554f277ee4be7edabb759a7f78138b693d72d0c263fEvan Cheng        return i;
55519e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng  }
55619e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng
557f277ee4be7edabb759a7f78138b693d72d0c263fEvan Cheng  return -1;
55819e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng}
559576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng
56032dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng/// isRegReDefinedByTwoAddr - Returns true if the Reg re-definition is due
56132dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng/// to two addr elimination.
56232dfbeada7292167bb488f36a71a5a6a519ddaffEvan Chengbool MachineInstr::isRegReDefinedByTwoAddr(unsigned Reg) const {
563749c6f6b5ed301c84aac562e414486549d7b98ebChris Lattner  const TargetInstrDesc &TID = getDesc();
56432dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng  for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
56532dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng    const MachineOperand &MO1 = getOperand(i);
56632dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng    if (MO1.isRegister() && MO1.isDef() && MO1.getReg() == Reg) {
56732dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng      for (unsigned j = i+1; j < e; ++j) {
56832dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng        const MachineOperand &MO2 = getOperand(j);
56932dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng        if (MO2.isRegister() && MO2.isUse() && MO2.getReg() == Reg &&
570749c6f6b5ed301c84aac562e414486549d7b98ebChris Lattner            TID.getOperandConstraint(j, TOI::TIED_TO) == (int)i)
57132dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng          return true;
57232dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng      }
57332dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng    }
57432dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng  }
57532dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng  return false;
57632dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng}
57732dfbeada7292167bb488f36a71a5a6a519ddaffEvan Cheng
578576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng/// copyKillDeadInfo - Copies kill / dead operand properties from MI.
579576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng///
580576d123e130a8291669dd2384a3735cc4933fd00Evan Chengvoid MachineInstr::copyKillDeadInfo(const MachineInstr *MI) {
581576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng  for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
582576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng    const MachineOperand &MO = MI->getOperand(i);
58392dfe2001e96f6e2b6d327e8816f38033f88b295Dan Gohman    if (!MO.isRegister() || (!MO.isKill() && !MO.isDead()))
584576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng      continue;
585576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng    for (unsigned j = 0, ee = getNumOperands(); j != ee; ++j) {
586576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng      MachineOperand &MOp = getOperand(j);
587576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng      if (!MOp.isIdenticalTo(MO))
588576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng        continue;
589576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng      if (MO.isKill())
590576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng        MOp.setIsKill();
591576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng      else
592576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng        MOp.setIsDead();
593576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng      break;
594576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng    }
595576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng  }
596576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng}
597576d123e130a8291669dd2384a3735cc4933fd00Evan Cheng
59819e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng/// copyPredicates - Copies predicate operand(s) from MI.
59919e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Chengvoid MachineInstr::copyPredicates(const MachineInstr *MI) {
600749c6f6b5ed301c84aac562e414486549d7b98ebChris Lattner  const TargetInstrDesc &TID = MI->getDesc();
601749c6f6b5ed301c84aac562e414486549d7b98ebChris Lattner  if (TID.isPredicable()) {
60219e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng    for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
603749c6f6b5ed301c84aac562e414486549d7b98ebChris Lattner      if (TID.OpInfo[i].isPredicate()) {
60419e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng        // Predicated operands must be last operands.
6058019f41c0b7fda031d494e3900eada7d4e494772Chris Lattner        addOperand(MI->getOperand(i));
60619e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng      }
60719e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng    }
60819e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng  }
60919e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng}
61019e3f31f6acd9f5ce3cdd8372d4cb598ed921f95Evan Cheng
61121326fc2ad47ee7e73a8c0b03a4a0cc0b0a0c4e8Brian Gaekevoid MachineInstr::dump() const {
612e81561909d128c6e2d8033cb5465a49b2596b26aBill Wendling  cerr << "  " << *this;
61370bc4b5d1a3795a8f41be96723cfcbccac8e1671Vikram S. Adve}
61470bc4b5d1a3795a8f41be96723cfcbccac8e1671Vikram S. Adve
615b140762a45d21aaed054f15adaff0fc2274d939dTanya Lattnervoid MachineInstr::print(std::ostream &OS, const TargetMachine *TM) const {
616e3087890ac7f2fcf4697f8e09091e9a384311b9cChris Lattner  // Specialize printing if op#0 is definition
6176a592271fb2946a0704b06fd66199987cdd40b3cChris Lattner  unsigned StartOp = 0;
61892dfe2001e96f6e2b6d327e8816f38033f88b295Dan Gohman  if (getNumOperands() && getOperand(0).isRegister() && getOperand(0).isDef()) {
619f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    getOperand(0).print(OS, TM);
6206a592271fb2946a0704b06fd66199987cdd40b3cChris Lattner    OS << " = ";
6216a592271fb2946a0704b06fd66199987cdd40b3cChris Lattner    ++StartOp;   // Don't print this operand again!
6226a592271fb2946a0704b06fd66199987cdd40b3cChris Lattner  }
623b140762a45d21aaed054f15adaff0fc2274d939dTanya Lattner
624749c6f6b5ed301c84aac562e414486549d7b98ebChris Lattner  OS << getDesc().getName();
625edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman
6266a592271fb2946a0704b06fd66199987cdd40b3cChris Lattner  for (unsigned i = StartOp, e = getNumOperands(); i != e; ++i) {
6276a592271fb2946a0704b06fd66199987cdd40b3cChris Lattner    if (i != StartOp)
6286a592271fb2946a0704b06fd66199987cdd40b3cChris Lattner      OS << ",";
6296a592271fb2946a0704b06fd66199987cdd40b3cChris Lattner    OS << " ";
630f73823000e2d5d6e1cf65bdf5a107297e18d35fbChris Lattner    getOperand(i).print(OS, TM);
6311049164aa6b06d91d9b3b557a9a213eaf3f6319aChris Lattner  }
632edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman
63369de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman  if (getNumMemOperands() > 0) {
63469de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman    OS << ", SV:";
63569de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman    for (unsigned i = 0; i < getNumMemOperands(); i++) {
63669de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman      const MemOperand &MRO = getMemOperand(i);
63769de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman      const Value *V = MRO.getValue();
63869de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman
63969de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman      assert(V && "SV missing.");
64069de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman      assert((MRO.isLoad() || MRO.isStore()) &&
64169de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman             "SV has to be a load, store or both.");
64269de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman
64369de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman      if (MRO.isVolatile())
64469de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman        OS << "Volatile ";
64569de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman      if (MRO.isLoad())
64669de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman        OS << "LD ";
64769de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman      if (MRO.isStore())
64869de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman        OS << "ST ";
64969de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman
65069de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman      OS  << MRO.getSize();
65169de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman
65269de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman      if (!V->getName().empty())
65369de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman        OS << "[" << V->getName() << " + " << MRO.getOffset() << "]";
65469de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman      else if (isa<PseudoSourceValue>(V))
65569de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman        OS << "[" << *V << " + " << MRO.getOffset() << "]";
65669de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman      else
65769de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman        OS << "[" << V << " + " << MRO.getOffset() << "]";
65869de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman    }
65969de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman  }
66069de1932b350d7cdfc0ed1f4198d6f78c7822a02Dan Gohman
6611049164aa6b06d91d9b3b557a9a213eaf3f6319aChris Lattner  OS << "\n";
6621049164aa6b06d91d9b3b557a9a213eaf3f6319aChris Lattner}
6631049164aa6b06d91d9b3b557a9a213eaf3f6319aChris Lattner
664b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Andersonbool MachineInstr::addRegisterKilled(unsigned IncomingReg,
665b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson                                     const MRegisterInfo *RegInfo,
666b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson                                     bool AddIfNotFound) {
667b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  bool Found = false;
668b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
669b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson    MachineOperand &MO = getOperand(i);
670b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson    if (MO.isRegister() && MO.isUse()) {
671b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson      unsigned Reg = MO.getReg();
672b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson      if (!Reg)
673b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        continue;
674b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson      if (Reg == IncomingReg) {
675b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        MO.setIsKill();
676b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        Found = true;
677b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        break;
678b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson      } else if (MRegisterInfo::isPhysicalRegister(Reg) &&
679b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson                 MRegisterInfo::isPhysicalRegister(IncomingReg) &&
680b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson                 RegInfo->isSuperRegister(IncomingReg, Reg) &&
681b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson                 MO.isKill())
682b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        // A super-register kill already exists.
683b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        Found = true;
684b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson    }
685b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  }
686b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson
687b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  // If not found, this means an alias of one of the operand is killed. Add a
688b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  // new implicit operand if required.
689b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  if (!Found && AddIfNotFound) {
690b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson    addOperand(MachineOperand::CreateReg(IncomingReg, false/*IsDef*/,
691b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson                                         true/*IsImp*/,true/*IsKill*/));
692b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson    return true;
693b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  }
694b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  return Found;
695b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson}
696b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson
697b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Andersonbool MachineInstr::addRegisterDead(unsigned IncomingReg,
698b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson                                   const MRegisterInfo *RegInfo,
699b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson                                   bool AddIfNotFound) {
700b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  bool Found = false;
701b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
702b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson    MachineOperand &MO = getOperand(i);
703b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson    if (MO.isRegister() && MO.isDef()) {
704b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson      unsigned Reg = MO.getReg();
705b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson      if (!Reg)
706b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        continue;
707b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson      if (Reg == IncomingReg) {
708b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        MO.setIsDead();
709b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        Found = true;
710b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        break;
711b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson      } else if (MRegisterInfo::isPhysicalRegister(Reg) &&
712b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson                 MRegisterInfo::isPhysicalRegister(IncomingReg) &&
713b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson                 RegInfo->isSuperRegister(IncomingReg, Reg) &&
714b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson                 MO.isDead())
715b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        // There exists a super-register that's marked dead.
716b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        return true;
717b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson    }
718b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  }
719b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson
720b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  // If not found, this means an alias of one of the operand is dead. Add a
721b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  // new implicit operand.
722b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  if (!Found && AddIfNotFound) {
723b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson    addOperand(MachineOperand::CreateReg(IncomingReg, true/*IsDef*/,
724b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson                                         true/*IsImp*/,false/*IsKill*/,
725b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson                                         true/*IsDead*/));
726b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson    return true;
727b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  }
728b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  return Found;
729b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson}
730b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson
731b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson/// copyKillDeadInfo - copies killed/dead information from one instr to another
732b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Andersonvoid MachineInstr::copyKillDeadInfo(MachineInstr *OldMI,
733b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson                                    const MRegisterInfo *RegInfo) {
734b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  // If the instruction defines any virtual registers, update the VarInfo,
735b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  // kill and dead information for the instruction.
736b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  for (unsigned i = 0, e = OldMI->getNumOperands(); i != e; ++i) {
737b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson    MachineOperand &MO = OldMI->getOperand(i);
738b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson    if (MO.isRegister() && MO.getReg() &&
739b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        MRegisterInfo::isVirtualRegister(MO.getReg())) {
740b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson      unsigned Reg = MO.getReg();
741b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson      if (MO.isDef()) {
742b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        if (MO.isDead()) {
743b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson          MO.setIsDead(false);
744b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson          addRegisterDead(Reg, RegInfo);
745b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        }
746b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson      }
747b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson      if (MO.isKill()) {
748b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        MO.setIsKill(false);
749b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson        addRegisterKilled(Reg, RegInfo);
750b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson      }
751b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson    }
752b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson  }
753b487e7215c4f70f3d98f8fbc0a11eb119afc1f37Owen Anderson}
754