#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/Constants.h"
+#include "llvm/Function.h"
#include "llvm/InlineAsm.h"
+#include "llvm/Metadata.h"
+#include "llvm/Type.h"
#include "llvm/Value.h"
+#include "llvm/Assembly/Writer.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
+#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetInstrDesc.h"
#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Analysis/DebugInfo.h"
+#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/LeakDetector.h"
#include "llvm/Support/MathExtras.h"
/// the specified value. If an operand is known to be an register already,
/// the setReg method should be used.
void MachineOperand::ChangeToRegister(unsigned Reg, bool isDef, bool isImp,
- bool isKill, bool isDead, bool isUndef) {
+ bool isKill, bool isDead, bool isUndef,
+ bool isDebug) {
// If this operand is already a register operand, use setReg to update the
// register's use/def lists.
if (isReg()) {
IsDead = isDead;
IsUndef = isUndef;
IsEarlyClobber = false;
+ IsDebug = isDebug;
SubReg = 0;
}
case MachineOperand::MO_ExternalSymbol:
return !strcmp(getSymbolName(), Other.getSymbolName()) &&
getOffset() == Other.getOffset();
+ case MachineOperand::MO_BlockAddress:
+ return getBlockAddress() == Other.getBlockAddress();
+ case MachineOperand::MO_MCSymbol:
+ return getMCSymbol() == Other.getMCSymbol();
+ case MachineOperand::MO_Metadata:
+ return getMetadata() == Other.getMetadata();
}
}
/// print - Print the specified machine operand.
///
void MachineOperand::print(raw_ostream &OS, const TargetMachine *TM) const {
+ // If the instruction is embedded into a basic block, we can find the
+ // target info for the instruction.
+ if (!TM)
+ if (const MachineInstr *MI = getParent())
+ if (const MachineBasicBlock *MBB = MI->getParent())
+ if (const MachineFunction *MF = MBB->getParent())
+ TM = &MF->getTarget();
+
switch (getType()) {
case MachineOperand::MO_Register:
if (getReg() == 0 || TargetRegisterInfo::isVirtualRegister(getReg())) {
OS << "%reg" << getReg();
} else {
- // If the instruction is embedded into a basic block, we can find the
- // target info for the instruction.
- if (TM == 0)
- if (const MachineInstr *MI = getParent())
- if (const MachineBasicBlock *MBB = MI->getParent())
- if (const MachineFunction *MF = MBB->getParent())
- TM = &MF->getTarget();
-
if (TM)
OS << "%" << TM->getRegisterInfo()->get(getReg()).Name;
else
- OS << "%mreg" << getReg();
+ OS << "%physreg" << getReg();
}
if (getSubReg() != 0)
isEarlyClobber()) {
OS << '<';
bool NeedComma = false;
- if (isImplicit()) {
- if (NeedComma) OS << ',';
- OS << (isDef() ? "imp-def" : "imp-use");
- NeedComma = true;
- } else if (isDef()) {
+ if (isDef()) {
if (NeedComma) OS << ',';
if (isEarlyClobber())
OS << "earlyclobber,";
+ if (isImplicit())
+ OS << "imp-";
OS << "def";
NeedComma = true;
+ } else if (isImplicit()) {
+ OS << "imp-use";
+ NeedComma = true;
}
+
if (isKill() || isDead() || isUndef()) {
if (NeedComma) OS << ',';
if (isKill()) OS << "kill";
OS << getImm();
break;
case MachineOperand::MO_FPImmediate:
- if (getFPImm()->getType() == Type::getFloatTy(getFPImm()->getContext()))
+ if (getFPImm()->getType()->isFloatTy())
OS << getFPImm()->getValueAPF().convertToFloat();
else
OS << getFPImm()->getValueAPF().convertToDouble();
break;
case MachineOperand::MO_MachineBasicBlock:
- OS << "mbb<"
- << ((Value*)getMBB()->getBasicBlock())->getName()
- << "," << (void*)getMBB() << '>';
+ OS << "<BB#" << getMBB()->getNumber() << ">";
break;
case MachineOperand::MO_FrameIndex:
OS << "<fi#" << getIndex() << '>';
OS << "<jt#" << getIndex() << '>';
break;
case MachineOperand::MO_GlobalAddress:
- OS << "<ga:" << ((Value*)getGlobal())->getName();
+ OS << "<ga:";
+ WriteAsOperand(OS, getGlobal(), /*PrintType=*/false);
if (getOffset()) OS << "+" << getOffset();
OS << '>';
break;
if (getOffset()) OS << "+" << getOffset();
OS << '>';
break;
+ case MachineOperand::MO_BlockAddress:
+ OS << '<';
+ WriteAsOperand(OS, getBlockAddress(), /*PrintType=*/false);
+ OS << '>';
+ break;
+ case MachineOperand::MO_Metadata:
+ OS << '<';
+ WriteAsOperand(OS, getMetadata(), /*PrintType=*/false);
+ OS << '>';
+ break;
+ case MachineOperand::MO_MCSymbol:
+ OS << "<MCSym=" << *getMCSymbol() << '>';
+ break;
default:
llvm_unreachable("Unrecognized operand type");
}
MachineMemOperand::MachineMemOperand(const Value *v, unsigned int f,
int64_t o, uint64_t s, unsigned int a)
: Offset(o), Size(s), V(v),
- Flags((f & 7) | ((Log2_32(a) + 1) << 3)) {
+ Flags((f & ((1 << MOMaxBits) - 1)) | ((Log2_32(a) + 1) << MOMaxBits)) {
assert(getBaseAlignment() == a && "Alignment is not a power of 2!");
assert((isLoad() || isStore()) && "Not a load/store!");
}
ID.AddInteger(Flags);
}
+void MachineMemOperand::refineAlignment(const MachineMemOperand *MMO) {
+ // The Value and Offset may differ due to CSE. But the flags and size
+ // should be the same.
+ assert(MMO->getFlags() == getFlags() && "Flags mismatch!");
+ assert(MMO->getSize() == getSize() && "Size mismatch!");
+
+ if (MMO->getBaseAlignment() >= getBaseAlignment()) {
+ // Update the alignment value.
+ Flags = (Flags & ((1 << MOMaxBits) - 1)) |
+ ((Log2_32(MMO->getBaseAlignment()) + 1) << MOMaxBits);
+ // Also update the base and offset, because the new alignment may
+ // not be applicable with the old ones.
+ V = MMO->getValue();
+ Offset = MMO->getOffset();
+ }
+}
+
+/// getAlignment - Return the minimum known alignment in bytes of the
+/// actual memory reference.
+uint64_t MachineMemOperand::getAlignment() const {
+ return MinAlign(getBaseAlignment(), getOffset());
+}
+
+raw_ostream &llvm::operator<<(raw_ostream &OS, const MachineMemOperand &MMO) {
+ assert((MMO.isLoad() || MMO.isStore()) &&
+ "SV has to be a load, store or both.");
+
+ if (MMO.isVolatile())
+ OS << "Volatile ";
+
+ if (MMO.isLoad())
+ OS << "LD";
+ if (MMO.isStore())
+ OS << "ST";
+ OS << MMO.getSize();
+
+ // Print the address information.
+ OS << "[";
+ if (!MMO.getValue())
+ OS << "<unknown>";
+ else
+ WriteAsOperand(OS, MMO.getValue(), /*PrintType=*/false);
+
+ // If the alignment of the memory reference itself differs from the alignment
+ // of the base pointer, print the base alignment explicitly, next to the base
+ // pointer.
+ if (MMO.getBaseAlignment() != MMO.getAlignment())
+ OS << "(align=" << MMO.getBaseAlignment() << ")";
+
+ if (MMO.getOffset() != 0)
+ OS << "+" << MMO.getOffset();
+ OS << "]";
+
+ // Print the alignment of the reference.
+ if (MMO.getBaseAlignment() != MMO.getAlignment() ||
+ MMO.getBaseAlignment() != MMO.getSize())
+ OS << "(align=" << MMO.getAlignment() << ")";
+
+ return OS;
+}
+
//===----------------------------------------------------------------------===//
// MachineInstr Implementation
//===----------------------------------------------------------------------===//
/// MachineInstr ctor - This constructor creates a dummy MachineInstr with
/// TID NULL and no operands.
MachineInstr::MachineInstr()
- : TID(0), NumImplicitOps(0), Parent(0), debugLoc(DebugLoc::getUnknownLoc()) {
+ : TID(0), NumImplicitOps(0), AsmPrinterFlags(0), MemRefs(0), MemRefsEnd(0),
+ Parent(0) {
// Make sure that we get added to a machine basicblock
LeakDetector::addGarbageObject(this);
}
addOperand(MachineOperand::CreateReg(*ImpUses, false, true));
}
-/// MachineInstr ctor - This constructor create a MachineInstr and add the
-/// implicit operands. It reserves space for number of operands specified by
-/// TargetInstrDesc or the numOperands if it is not zero. (for
-/// instructions with variable number of operands).
+/// MachineInstr ctor - This constructor creates a MachineInstr and adds the
+/// implicit operands. It reserves space for the number of operands specified by
+/// the TargetInstrDesc.
MachineInstr::MachineInstr(const TargetInstrDesc &tid, bool NoImp)
- : TID(&tid), NumImplicitOps(0), Parent(0),
- debugLoc(DebugLoc::getUnknownLoc()) {
- if (!NoImp && TID->getImplicitDefs())
- for (const unsigned *ImpDefs = TID->getImplicitDefs(); *ImpDefs; ++ImpDefs)
- NumImplicitOps++;
- if (!NoImp && TID->getImplicitUses())
- for (const unsigned *ImpUses = TID->getImplicitUses(); *ImpUses; ++ImpUses)
- NumImplicitOps++;
+ : TID(&tid), NumImplicitOps(0), AsmPrinterFlags(0),
+ MemRefs(0), MemRefsEnd(0), Parent(0) {
+ if (!NoImp)
+ NumImplicitOps = TID->getNumImplicitDefs() + TID->getNumImplicitUses();
Operands.reserve(NumImplicitOps + TID->getNumOperands());
if (!NoImp)
addImplicitDefUseOperands();
/// MachineInstr ctor - As above, but with a DebugLoc.
MachineInstr::MachineInstr(const TargetInstrDesc &tid, const DebugLoc dl,
bool NoImp)
- : TID(&tid), NumImplicitOps(0), Parent(0), debugLoc(dl) {
- if (!NoImp && TID->getImplicitDefs())
- for (const unsigned *ImpDefs = TID->getImplicitDefs(); *ImpDefs; ++ImpDefs)
- NumImplicitOps++;
- if (!NoImp && TID->getImplicitUses())
- for (const unsigned *ImpUses = TID->getImplicitUses(); *ImpUses; ++ImpUses)
- NumImplicitOps++;
+ : TID(&tid), NumImplicitOps(0), AsmPrinterFlags(0), MemRefs(0), MemRefsEnd(0),
+ Parent(0), debugLoc(dl) {
+ if (!NoImp)
+ NumImplicitOps = TID->getNumImplicitDefs() + TID->getNumImplicitUses();
Operands.reserve(NumImplicitOps + TID->getNumOperands());
if (!NoImp)
addImplicitDefUseOperands();
/// MachineInstr ctor - Work exactly the same as the ctor two above, except
/// that the MachineInstr is created and added to the end of the specified
/// basic block.
-///
MachineInstr::MachineInstr(MachineBasicBlock *MBB, const TargetInstrDesc &tid)
- : TID(&tid), NumImplicitOps(0), Parent(0),
- debugLoc(DebugLoc::getUnknownLoc()) {
+ : TID(&tid), NumImplicitOps(0), AsmPrinterFlags(0),
+ MemRefs(0), MemRefsEnd(0), Parent(0) {
assert(MBB && "Cannot use inserting ctor with null basic block!");
- if (TID->ImplicitDefs)
- for (const unsigned *ImpDefs = TID->getImplicitDefs(); *ImpDefs; ++ImpDefs)
- NumImplicitOps++;
- if (TID->ImplicitUses)
- for (const unsigned *ImpUses = TID->getImplicitUses(); *ImpUses; ++ImpUses)
- NumImplicitOps++;
+ NumImplicitOps = TID->getNumImplicitDefs() + TID->getNumImplicitUses();
Operands.reserve(NumImplicitOps + TID->getNumOperands());
addImplicitDefUseOperands();
// Make sure that we get added to a machine basicblock
///
MachineInstr::MachineInstr(MachineBasicBlock *MBB, const DebugLoc dl,
const TargetInstrDesc &tid)
- : TID(&tid), NumImplicitOps(0), Parent(0), debugLoc(dl) {
+ : TID(&tid), NumImplicitOps(0), AsmPrinterFlags(0), MemRefs(0), MemRefsEnd(0),
+ Parent(0), debugLoc(dl) {
assert(MBB && "Cannot use inserting ctor with null basic block!");
- if (TID->ImplicitDefs)
- for (const unsigned *ImpDefs = TID->getImplicitDefs(); *ImpDefs; ++ImpDefs)
- NumImplicitOps++;
- if (TID->ImplicitUses)
- for (const unsigned *ImpUses = TID->getImplicitUses(); *ImpUses; ++ImpUses)
- NumImplicitOps++;
+ NumImplicitOps = TID->getNumImplicitDefs() + TID->getNumImplicitUses();
Operands.reserve(NumImplicitOps + TID->getNumOperands());
addImplicitDefUseOperands();
// Make sure that we get added to a machine basicblock
/// MachineInstr ctor - Copies MachineInstr arg exactly
///
MachineInstr::MachineInstr(MachineFunction &MF, const MachineInstr &MI)
- : TID(&MI.getDesc()), NumImplicitOps(0), Parent(0),
- debugLoc(MI.getDebugLoc()) {
+ : TID(&MI.getDesc()), NumImplicitOps(0), AsmPrinterFlags(0),
+ MemRefs(MI.MemRefs), MemRefsEnd(MI.MemRefsEnd),
+ Parent(0), debugLoc(MI.getDebugLoc()) {
Operands.reserve(MI.getNumOperands());
// Add operands
addOperand(MI.getOperand(i));
NumImplicitOps = MI.NumImplicitOps;
- // Add memory operands.
- for (std::list<MachineMemOperand>::const_iterator i = MI.memoperands_begin(),
- j = MI.memoperands_end(); i != j; ++i)
- addMemOperand(MF, *i);
-
// Set parent to null.
Parent = 0;
MachineInstr::~MachineInstr() {
LeakDetector::removeGarbageObject(this);
- assert(MemOperands.empty() &&
- "MachineInstr being deleted with live memoperands!");
#ifndef NDEBUG
for (unsigned i = 0, e = Operands.size(); i != e; ++i) {
assert(Operands[i].ParentMI == this && "ParentMI mismatch!");
Operands.back().ParentMI = this;
// If the operand is a register, update the operand's use list.
- if (Op.isReg())
+ if (Op.isReg()) {
Operands.back().AddRegOperandToRegInfo(RegInfo);
+ // If the register operand is flagged as early, mark the operand as such
+ unsigned OpNo = Operands.size() - 1;
+ if (TID->getOperandConstraint(OpNo, TOI::EARLY_CLOBBER) != -1)
+ Operands[OpNo].setIsEarlyClobber(true);
+ }
return;
}
}
// Do explicitly set the reginfo for this operand though, to ensure the
// next/prev fields are properly nulled out.
- if (Operands[OpNo].isReg())
+ if (Operands[OpNo].isReg()) {
Operands[OpNo].AddRegOperandToRegInfo(0);
+ // If the register operand is flagged as early, mark the operand as such
+ if (TID->getOperandConstraint(OpNo, TOI::EARLY_CLOBBER) != -1)
+ Operands[OpNo].setIsEarlyClobber(true);
+ }
} else if (Operands.size()+1 <= Operands.capacity()) {
// Otherwise, we have to remove register operands from their register use
Operands.insert(Operands.begin()+OpNo, Op);
Operands[OpNo].ParentMI = this;
- if (Operands[OpNo].isReg())
+ if (Operands[OpNo].isReg()) {
Operands[OpNo].AddRegOperandToRegInfo(RegInfo);
+ // If the register operand is flagged as early, mark the operand as such
+ if (TID->getOperandConstraint(OpNo, TOI::EARLY_CLOBBER) != -1)
+ Operands[OpNo].setIsEarlyClobber(true);
+ }
// Re-add all the implicit ops.
for (unsigned i = OpNo+1, e = Operands.size(); i != e; ++i) {
// Re-add all the operands.
AddRegOperandsToUseLists(*RegInfo);
+
+ // If the register operand is flagged as early, mark the operand as such
+ if (Operands[OpNo].isReg()
+ && TID->getOperandConstraint(OpNo, TOI::EARLY_CLOBBER) != -1)
+ Operands[OpNo].setIsEarlyClobber(true);
}
}
}
}
-/// addMemOperand - Add a MachineMemOperand to the machine instruction,
-/// referencing arbitrary storage.
+/// addMemOperand - Add a MachineMemOperand to the machine instruction.
+/// This function should be used only occasionally. The setMemRefs function
+/// is the primary method for setting up a MachineInstr's MemRefs list.
void MachineInstr::addMemOperand(MachineFunction &MF,
- const MachineMemOperand &MO) {
- MemOperands.push_back(MO);
-}
+ MachineMemOperand *MO) {
+ mmo_iterator OldMemRefs = MemRefs;
+ mmo_iterator OldMemRefsEnd = MemRefsEnd;
-/// clearMemOperands - Erase all of this MachineInstr's MachineMemOperands.
-void MachineInstr::clearMemOperands(MachineFunction &MF) {
- MemOperands.clear();
+ size_t NewNum = (MemRefsEnd - MemRefs) + 1;
+ mmo_iterator NewMemRefs = MF.allocateMemRefsArray(NewNum);
+ mmo_iterator NewMemRefsEnd = NewMemRefs + NewNum;
+
+ std::copy(OldMemRefs, OldMemRefsEnd, NewMemRefs);
+ NewMemRefs[NewNum - 1] = MO;
+
+ MemRefs = NewMemRefs;
+ MemRefsEnd = NewMemRefsEnd;
}
+bool MachineInstr::isIdenticalTo(const MachineInstr *Other,
+ MICheckType Check) const {
+ // If opcodes or number of operands are not the same then the two
+ // instructions are obviously not identical.
+ if (Other->getOpcode() != getOpcode() ||
+ Other->getNumOperands() != getNumOperands())
+ return false;
+
+ // Check operands to make sure they match.
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
+ const MachineOperand &MO = getOperand(i);
+ const MachineOperand &OMO = Other->getOperand(i);
+ // Clients may or may not want to ignore defs when testing for equality.
+ // For example, machine CSE pass only cares about finding common
+ // subexpressions, so it's safe to ignore virtual register defs.
+ if (Check != CheckDefs && MO.isReg() && MO.isDef()) {
+ if (Check == IgnoreDefs)
+ continue;
+ // Check == IgnoreVRegDefs
+ if (TargetRegisterInfo::isPhysicalRegister(MO.getReg()) ||
+ TargetRegisterInfo::isPhysicalRegister(OMO.getReg()))
+ if (MO.getReg() != OMO.getReg())
+ return false;
+ } else if (!MO.isIdenticalTo(OMO))
+ return false;
+ }
+ return true;
+}
/// removeFromParent - This method unlinks 'this' from the containing basic
/// block, and returns it, but does not delete it.
}
-/// isLabel - Returns true if the MachineInstr represents a label.
-///
-bool MachineInstr::isLabel() const {
- return getOpcode() == TargetInstrInfo::DBG_LABEL ||
- getOpcode() == TargetInstrInfo::EH_LABEL ||
- getOpcode() == TargetInstrInfo::GC_LABEL;
-}
-
-/// isDebugLabel - Returns true if the MachineInstr represents a debug label.
-///
-bool MachineInstr::isDebugLabel() const {
- return getOpcode() == TargetInstrInfo::DBG_LABEL;
-}
-
/// findRegisterUseOperandIdx() - Returns the MachineOperand that is a use of
/// the specific register or -1 if it is not found. It further tightens
/// the search criteria to a use that kills the register if isKill is true.
/// first tied use operand index by reference is UseOpIdx is not null.
bool MachineInstr::
isRegTiedToUseOperand(unsigned DefOpIdx, unsigned *UseOpIdx) const {
- if (getOpcode() == TargetInstrInfo::INLINEASM) {
+ if (isInlineAsm()) {
assert(DefOpIdx >= 2);
const MachineOperand &MO = getOperand(DefOpIdx);
if (!MO.isReg() || !MO.isDef() || MO.getReg() == 0)
/// operand index by reference.
bool MachineInstr::
isRegTiedToDefOperand(unsigned UseOpIdx, unsigned *DefOpIdx) const {
- if (getOpcode() == TargetInstrInfo::INLINEASM) {
+ if (isInlineAsm()) {
const MachineOperand &MO = getOperand(UseOpIdx);
if (!MO.isReg() || !MO.isUse() || MO.getReg() == 0)
return false;
/// SawStore is set to true, it means that there is a store (or call) between
/// the instruction's location and its intended destination.
bool MachineInstr::isSafeToMove(const TargetInstrInfo *TII,
+ AliasAnalysis *AA,
bool &SawStore) const {
// Ignore stuff that we obviously can't move.
if (TID->mayStore() || TID->isCall()) {
// destination. The check for isInvariantLoad gives the targe the chance to
// classify the load as always returning a constant, e.g. a constant pool
// load.
- if (TID->mayLoad() && !TII->isInvariantLoad(this))
+ if (TID->mayLoad() && !isInvariantLoad(AA))
// Otherwise, this is a real load. If there is a store between the load and
// end of block, or if the load is volatile, we can't move it.
return !SawStore && !hasVolatileMemoryRef();
/// isSafeToReMat - Return true if it's safe to rematerialize the specified
/// instruction which defined the specified register instead of copying it.
bool MachineInstr::isSafeToReMat(const TargetInstrInfo *TII,
+ AliasAnalysis *AA,
unsigned DstReg) const {
bool SawStore = false;
- if (!getDesc().isRematerializable() ||
- !TII->isTriviallyReMaterializable(this) ||
- !isSafeToMove(TII, SawStore))
+ if (!TII->isTriviallyReMaterializable(this, AA) ||
+ !isSafeToMove(TII, AA, SawStore))
return false;
for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
const MachineOperand &MO = getOperand(i);
return true;
// Check the memory reference information for volatile references.
- for (std::list<MachineMemOperand>::const_iterator I = memoperands_begin(),
- E = memoperands_end(); I != E; ++I)
- if (I->isVolatile())
+ for (mmo_iterator I = memoperands_begin(), E = memoperands_end(); I != E; ++I)
+ if ((*I)->isVolatile())
return true;
return false;
}
+/// isInvariantLoad - Return true if this instruction is loading from a
+/// location whose value is invariant across the function. For example,
+/// loading a value from the constant pool or from the argument area
+/// of a function if it does not change. This should only return true of
+/// *all* loads the instruction does are invariant (if it does multiple loads).
+bool MachineInstr::isInvariantLoad(AliasAnalysis *AA) const {
+ // If the instruction doesn't load at all, it isn't an invariant load.
+ if (!TID->mayLoad())
+ return false;
+
+ // If the instruction has lost its memoperands, conservatively assume that
+ // it may not be an invariant load.
+ if (memoperands_empty())
+ return false;
+
+ const MachineFrameInfo *MFI = getParent()->getParent()->getFrameInfo();
+
+ for (mmo_iterator I = memoperands_begin(),
+ E = memoperands_end(); I != E; ++I) {
+ if ((*I)->isVolatile()) return false;
+ if ((*I)->isStore()) return false;
+
+ if (const Value *V = (*I)->getValue()) {
+ // A load from a constant PseudoSourceValue is invariant.
+ if (const PseudoSourceValue *PSV = dyn_cast<PseudoSourceValue>(V))
+ if (PSV->isConstant(MFI))
+ continue;
+ // If we have an AliasAnalysis, ask it whether the memory is constant.
+ if (AA && AA->pointsToConstantMemory(V))
+ continue;
+ }
+
+ // Otherwise assume conservatively.
+ return false;
+ }
+
+ // Everything checks out.
+ return true;
+}
+
+/// isConstantValuePHI - If the specified instruction is a PHI that always
+/// merges together the same virtual register, return the register, otherwise
+/// return 0.
+unsigned MachineInstr::isConstantValuePHI() const {
+ if (!isPHI())
+ return 0;
+ assert(getNumOperands() >= 3 &&
+ "It's illegal to have a PHI without source operands");
+
+ unsigned Reg = getOperand(1).getReg();
+ for (unsigned i = 3, e = getNumOperands(); i < e; i += 2)
+ if (getOperand(i).getReg() != Reg)
+ return 0;
+ return Reg;
+}
+
+/// allDefsAreDead - Return true if all the defs of this instruction are dead.
+///
+bool MachineInstr::allDefsAreDead() const {
+ for (unsigned i = 0, e = getNumOperands(); i < e; ++i) {
+ const MachineOperand &MO = getOperand(i);
+ if (!MO.isReg() || MO.isUse())
+ continue;
+ if (!MO.isDead())
+ return false;
+ }
+ return true;
+}
+
void MachineInstr::dump() const {
- errs() << " " << *this;
+ dbgs() << " " << *this;
}
void MachineInstr::print(raw_ostream &OS, const TargetMachine *TM) const {
- // Specialize printing if op#0 is definition
- unsigned StartOp = 0;
- if (getNumOperands() && getOperand(0).isReg() && getOperand(0).isDef()) {
- getOperand(0).print(OS, TM);
- OS << " = ";
- ++StartOp; // Don't print this operand again!
+ // We can be a bit tidier if we know the TargetMachine and/or MachineFunction.
+ const MachineFunction *MF = 0;
+ if (const MachineBasicBlock *MBB = getParent()) {
+ MF = MBB->getParent();
+ if (!TM && MF)
+ TM = &MF->getTarget();
}
+ // Print explicitly defined operands on the left of an assignment syntax.
+ unsigned StartOp = 0, e = getNumOperands();
+ for (; StartOp < e && getOperand(StartOp).isReg() &&
+ getOperand(StartOp).isDef() &&
+ !getOperand(StartOp).isImplicit();
+ ++StartOp) {
+ if (StartOp != 0) OS << ", ";
+ getOperand(StartOp).print(OS, TM);
+ }
+
+ if (StartOp != 0)
+ OS << " = ";
+
+ // Print the opcode name.
OS << getDesc().getName();
+ // Print the rest of the operands.
+ bool OmittedAnyCallClobbers = false;
+ bool FirstOp = true;
for (unsigned i = StartOp, e = getNumOperands(); i != e; ++i) {
- if (i != StartOp)
- OS << ",";
+ const MachineOperand &MO = getOperand(i);
+
+ // Omit call-clobbered registers which aren't used anywhere. This makes
+ // call instructions much less noisy on targets where calls clobber lots
+ // of registers. Don't rely on MO.isDead() because we may be called before
+ // LiveVariables is run, or we may be looking at a non-allocatable reg.
+ if (MF && getDesc().isCall() &&
+ MO.isReg() && MO.isImplicit() && MO.isDef()) {
+ unsigned Reg = MO.getReg();
+ if (Reg != 0 && TargetRegisterInfo::isPhysicalRegister(Reg)) {
+ const MachineRegisterInfo &MRI = MF->getRegInfo();
+ if (MRI.use_empty(Reg) && !MRI.isLiveOut(Reg)) {
+ bool HasAliasLive = false;
+ for (const unsigned *Alias = TM->getRegisterInfo()->getAliasSet(Reg);
+ unsigned AliasReg = *Alias; ++Alias)
+ if (!MRI.use_empty(AliasReg) || MRI.isLiveOut(AliasReg)) {
+ HasAliasLive = true;
+ break;
+ }
+ if (!HasAliasLive) {
+ OmittedAnyCallClobbers = true;
+ continue;
+ }
+ }
+ }
+ }
+
+ if (FirstOp) FirstOp = false; else OS << ",";
OS << " ";
- getOperand(i).print(OS, TM);
+ if (i < getDesc().NumOperands) {
+ const TargetOperandInfo &TOI = getDesc().OpInfo[i];
+ if (TOI.isPredicate())
+ OS << "pred:";
+ if (TOI.isOptionalDef())
+ OS << "opt:";
+ }
+ MO.print(OS, TM);
+ }
+
+ // Briefly indicate whether any call clobbers were omitted.
+ if (OmittedAnyCallClobbers) {
+ if (!FirstOp) OS << ",";
+ OS << " ...";
}
+ bool HaveSemi = false;
if (!memoperands_empty()) {
- OS << ", Mem:";
- for (std::list<MachineMemOperand>::const_iterator i = memoperands_begin(),
- e = memoperands_end(); i != e; ++i) {
- const MachineMemOperand &MRO = *i;
- const Value *V = MRO.getValue();
-
- assert((MRO.isLoad() || MRO.isStore()) &&
- "SV has to be a load, store or both.");
-
- if (MRO.isVolatile())
- OS << "Volatile ";
-
- if (MRO.isLoad())
- OS << "LD";
- if (MRO.isStore())
- OS << "ST";
-
- OS << "(" << MRO.getSize() << "," << MRO.getAlignment() << ") [";
-
- if (!V)
- OS << "<unknown>";
- else if (!V->getName().empty())
- OS << V->getName();
- else if (const PseudoSourceValue *PSV = dyn_cast<PseudoSourceValue>(V)) {
- PSV->print(OS);
- } else
- OS << V;
-
- OS << " + " << MRO.getOffset() << "]";
+ if (!HaveSemi) OS << ";"; HaveSemi = true;
+
+ OS << " mem:";
+ for (mmo_iterator i = memoperands_begin(), e = memoperands_end();
+ i != e; ++i) {
+ OS << **i;
+ if (next(i) != e)
+ OS << " ";
}
}
- if (!debugLoc.isUnknown()) {
- const MachineFunction *MF = getParent()->getParent();
- DebugLocTuple DLT = MF->getDebugLocTuple(debugLoc);
- DICompileUnit CU(DLT.CompileUnit);
- std::string Dir, Fn;
- OS << " [dbg: "
- << CU.getDirectory(Dir) << '/' << CU.getFilename(Fn) << ","
- << DLT.Line << ","
- << DLT.Col << "]";
+ if (!debugLoc.isUnknown() && MF) {
+ if (!HaveSemi) OS << ";";
+
+ // TODO: print InlinedAtLoc information
+
+ DIScope Scope(debugLoc.getScope(MF->getFunction()->getContext()));
+ OS << " dbg:";
+ // Omit the directory, since it's usually long and uninteresting.
+ if (Scope.Verify())
+ OS << Scope.getFilename();
+ else
+ OS << "<unknown>";
+ OS << ':' << debugLoc.getLine();
+ if (debugLoc.getCol() != 0)
+ OS << ':' << debugLoc.getCol();
}
OS << "\n";
true /*IsDead*/));
return true;
}
+
+void MachineInstr::addRegisterDefined(unsigned IncomingReg,
+ const TargetRegisterInfo *RegInfo) {
+ MachineOperand *MO = findRegisterDefOperand(IncomingReg, false, RegInfo);
+ if (!MO || MO->getSubReg())
+ addOperand(MachineOperand::CreateReg(IncomingReg,
+ true /*IsDef*/,
+ true /*IsImp*/));
+}
+
+unsigned
+MachineInstrExpressionTrait::getHashValue(const MachineInstr* const &MI) {
+ unsigned Hash = MI->getOpcode() * 37;
+ for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
+ const MachineOperand &MO = MI->getOperand(i);
+ uint64_t Key = (uint64_t)MO.getType() << 32;
+ switch (MO.getType()) {
+ default: break;
+ case MachineOperand::MO_Register:
+ if (MO.isDef() && MO.getReg() &&
+ TargetRegisterInfo::isVirtualRegister(MO.getReg()))
+ continue; // Skip virtual register defs.
+ Key |= MO.getReg();
+ break;
+ case MachineOperand::MO_Immediate:
+ Key |= MO.getImm();
+ break;
+ case MachineOperand::MO_FrameIndex:
+ case MachineOperand::MO_ConstantPoolIndex:
+ case MachineOperand::MO_JumpTableIndex:
+ Key |= MO.getIndex();
+ break;
+ case MachineOperand::MO_MachineBasicBlock:
+ Key |= DenseMapInfo<void*>::getHashValue(MO.getMBB());
+ break;
+ case MachineOperand::MO_GlobalAddress:
+ Key |= DenseMapInfo<void*>::getHashValue(MO.getGlobal());
+ break;
+ case MachineOperand::MO_BlockAddress:
+ Key |= DenseMapInfo<void*>::getHashValue(MO.getBlockAddress());
+ break;
+ case MachineOperand::MO_MCSymbol:
+ Key |= DenseMapInfo<void*>::getHashValue(MO.getMCSymbol());
+ break;
+ }
+ Key += ~(Key << 32);
+ Key ^= (Key >> 22);
+ Key += ~(Key << 13);
+ Key ^= (Key >> 8);
+ Key += (Key << 3);
+ Key ^= (Key >> 15);
+ Key += ~(Key << 27);
+ Key ^= (Key >> 31);
+ Hash = (unsigned)Key + Hash * 37;
+ }
+ return Hash;
+}
projects / oota-llvm.git / blobdiff