Remove M_2_ADDR_FLAG.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31583 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Target/TargetInstrInfo.h

@@ -52,37 +52,34 @@ const unsigned M_DELAY_SLOT_FLAG       = 1 << 4;
 const unsigned M_LOAD_FLAG             = 1 << 5;
 const unsigned M_STORE_FLAG            = 1 << 6;
 
-// M_2_ADDR_FLAG - 3-addr instructions which really work like 2-addr ones.
+// M_CONVERTIBLE_TO_3_ADDR - This is a 2-address instruction which can be
-const unsigned M_2_ADDR_FLAG           = 1 << 7;
-
-// M_CONVERTIBLE_TO_3_ADDR - This is a M_2_ADDR_FLAG instruction which can be
 // changed into a 3-address instruction if the first two operands cannot be
 // assigned to the same register.  The target must implement the
 // TargetInstrInfo::convertToThreeAddress method for this instruction.
-const unsigned M_CONVERTIBLE_TO_3_ADDR = 1 << 8;
+const unsigned M_CONVERTIBLE_TO_3_ADDR = 1 << 7;
 
 // This M_COMMUTABLE - is a 2- or 3-address instruction (of the form X = op Y,
 // Z), which produces the same result if Y and Z are exchanged.
-const unsigned M_COMMUTABLE            = 1 << 9;
+const unsigned M_COMMUTABLE            = 1 << 8;
 
 // M_TERMINATOR_FLAG - Is this instruction part of the terminator for a basic
 // block?  Typically this is things like return and branch instructions.
 // Various passes use this to insert code into the bottom of a basic block, but
 // before control flow occurs.
-const unsigned M_TERMINATOR_FLAG       = 1 << 10;
+const unsigned M_TERMINATOR_FLAG       = 1 << 9;
 
 // M_USES_CUSTOM_DAG_SCHED_INSERTION - Set if this instruction requires custom
 // insertion support when the DAG scheduler is inserting it into a machine basic
 // block.
-const unsigned M_USES_CUSTOM_DAG_SCHED_INSERTION = 1 << 11;
+const unsigned M_USES_CUSTOM_DAG_SCHED_INSERTION = 1 << 10;
 
 // M_VARIABLE_OPS - Set if this instruction can have a variable number of extra
 // operands in addition to the minimum number operands specified.
-const unsigned M_VARIABLE_OPS = 1 << 12;
+const unsigned M_VARIABLE_OPS = 1 << 11;
 
 // M_PREDICATED - Set if this instruction has a predicate that controls its
 // execution.
-const unsigned M_PREDICATED = 1 << 13;
+const unsigned M_PREDICATED = 1 << 12;
 
 
 // Machine operand flags
@@ -184,9 +181,6 @@ public:
     return get(Opcode).Flags & M_RET_FLAG;
   }
 
-  bool isTwoAddrInstr(MachineOpCode Opcode) const {
-    return get(Opcode).Flags & M_2_ADDR_FLAG;
-  }
   bool isPredicated(MachineOpCode Opcode) const {
     return get(Opcode).Flags & M_PREDICATED;
   }

lib/CodeGen/TwoAddressInstructionPass.cpp

@@ -191,8 +191,6 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
                 mbbi->erase(mi);                 // Nuke the old inst.
                 mi = New;
                 ++NumConvertedTo3Addr;
-                assert(!TII.isTwoAddrInstr(New->getOpcode()) &&
-                       "convertToThreeAddress returned a 2-addr instruction??");
                 // Done with this instruction.
                 break;
               }

lib/Target/X86/X86CodeEmitter.cpp

@@ -470,7 +470,8 @@ unsigned Emitter::determineREX(const MachineInstr &MI) {
     REX |= 1 << 3;
 
   if (MI.getNumOperands()) {
-    bool isTwoAddr = (Desc.Flags & M_2_ADDR_FLAG) != 0;
+    bool isTwoAddr = II->getNumOperands(Opcode) > 1 &&
+      II->getOperandConstraint(Opcode, 1, TargetInstrInfo::TIED_TO) != -1;
 
     // If it accesses SPL, BPL, SIL, or DIL, then it requires a 0x40 REX prefix.
     bool isTrunc8 = isX86_64TruncToByte(Opcode);
@@ -607,7 +608,9 @@ void Emitter::emitInstruction(const MachineInstr &MI) {
 
   // If this is a two-address instruction, skip one of the register operands.
   unsigned CurOp = 0;
-  CurOp += (Desc.Flags & M_2_ADDR_FLAG) != 0;
+  if (II->getNumOperands(Opcode) > 1 &&
+      II->getOperandConstraint(Opcode, 1, TargetInstrInfo::TIED_TO) != -1)
+    CurOp++;
   
   unsigned char BaseOpcode = II->getBaseOpcodeFor(Opcode);
   switch (Desc.TSFlags & X86II::FormMask) {

lib/Target/X86/X86RegisterInfo.cpp

@@ -284,14 +284,15 @@ MachineInstr* X86RegisterInfo::foldMemoryOperand(MachineInstr *MI,
   const TableEntry *OpcodeTablePtr = NULL;
   unsigned OpcodeTableSize = 0;
   bool isTwoAddrFold = false;
+  bool isTwoAddr = TII.getNumOperands(MI->getOpcode()) > 1 &&
+    TII.getOperandConstraint(MI->getOpcode(), 1,TargetInstrInfo::TIED_TO) != -1;
 
   // Folding a memory location into the two-address part of a two-address
   // instruction is different than folding it other places.  It requires
   // replacing the *two* registers with the memory location.
-  if (MI->getNumOperands() >= 2 && MI->getOperand(0).isReg() && 
+  if (isTwoAddr && MI->getNumOperands() >= 2 && MI->getOperand(0).isReg() && 
       MI->getOperand(1).isReg() && i < 2 &&
-      MI->getOperand(0).getReg() == MI->getOperand(1).getReg() &&
+      MI->getOperand(0).getReg() == MI->getOperand(1).getReg()) {
-      TII.isTwoAddrInstr(MI->getOpcode())) {
     static const TableEntry OpcodeTable[] = {
       { X86::ADC32ri,     X86::ADC32mi },
       { X86::ADC32ri8,    X86::ADC32mi8 },

utils/TableGen/InstrInfoEmitter.cpp

@@ -232,7 +232,6 @@ void InstrInfoEmitter::emitRecord(const CodeGenInstruction &Inst, unsigned Num,
   if (Inst.isCall)       OS << "|M_CALL_FLAG";
   if (Inst.isLoad)       OS << "|M_LOAD_FLAG";
   if (Inst.isStore || isStore) OS << "|M_STORE_FLAG";
-  if (Inst.isTwoAddress) OS << "|M_2_ADDR_FLAG";
   if (Inst.isPredicated) OS << "|M_PREDICATED";
   if (Inst.isConvertibleToThreeAddress) OS << "|M_CONVERTIBLE_TO_3_ADDR";
   if (Inst.isCommutable) OS << "|M_COMMUTABLE";