When a load operand is promoted to an extload, replace other uses with uses of extloa...

[oota-llvm.git] / lib / CodeGen / MachineInstr.cpp

diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index 2ac76f34abb604b7f10e2cb1262569e67ba8c646..9f855d9db285bd1a6f4a85951e6f147aa21e5d0d 100644 (file)
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -192,6 +192,8 @@ bool MachineOperand::isIdenticalTo(const MachineOperand &Other) const {
     return getBlockAddress() == Other.getBlockAddress();
   case MachineOperand::MO_MCSymbol:
     return getMCSymbol() == Other.getMCSymbol();
+  case MachineOperand::MO_Metadata:
+    return getMetadata() == Other.getMetadata();
   }
 }
 
@@ -395,7 +397,7 @@ raw_ostream &llvm::operator<<(raw_ostream &OS, const MachineMemOperand &MMO) {
 /// TID NULL and no operands.
 MachineInstr::MachineInstr()
   : TID(0), NumImplicitOps(0), AsmPrinterFlags(0), MemRefs(0), MemRefsEnd(0),
-    Parent(0), debugLoc(DebugLoc::getUnknownLoc()) {
+    Parent(0) {
   // Make sure that we get added to a machine basicblock
   LeakDetector::addGarbageObject(this);
 }
@@ -409,20 +411,14 @@ void MachineInstr::addImplicitDefUseOperands() {
       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), AsmPrinterFlags(0),
-    MemRefs(0), MemRefsEnd(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++;
+    MemRefs(0), MemRefsEnd(0), Parent(0) {
+  if (!NoImp)
+    NumImplicitOps = TID->getNumImplicitDefs() + TID->getNumImplicitUses();
   Operands.reserve(NumImplicitOps + TID->getNumOperands());
   if (!NoImp)
     addImplicitDefUseOperands();
@@ -435,12 +431,8 @@ MachineInstr::MachineInstr(const TargetInstrDesc &tid, const DebugLoc dl,
                            bool NoImp)
   : TID(&tid), NumImplicitOps(0), AsmPrinterFlags(0), MemRefs(0), MemRefsEnd(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++;
+  if (!NoImp)
+    NumImplicitOps = TID->getNumImplicitDefs() + TID->getNumImplicitUses();
   Operands.reserve(NumImplicitOps + TID->getNumOperands());
   if (!NoImp)
     addImplicitDefUseOperands();
@@ -451,18 +443,11 @@ MachineInstr::MachineInstr(const TargetInstrDesc &tid, const DebugLoc dl,
 /// 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), AsmPrinterFlags(0),
-    MemRefs(0), MemRefsEnd(0), Parent(0), 
-    debugLoc(DebugLoc::getUnknownLoc()) {
+    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
@@ -477,12 +462,7 @@ MachineInstr::MachineInstr(MachineBasicBlock *MBB, const 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
@@ -1125,6 +1105,19 @@ unsigned MachineInstr::isConstantValuePHI() const {
   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 {
   dbgs() << "  " << *this;
 }