Revert 23028 - "MIPS: Add support for arch. revision 6 to mips32 port."

src/mips/lithium-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_MIPS
 
 #include "src/hydrogen-osr.h"
 #include "src/lithium-inl.h"
@@ skipping 1307 matching lines @@
   return result;
 }
 
 
 LInstruction* LChunkBuilder::DoDivI(HDiv* instr) {
   DCHECK(instr->representation().IsSmiOrInteger32());
   DCHECK(instr->left()->representation().Equals(instr->representation()));
   DCHECK(instr->right()->representation().Equals(instr->representation()));
   LOperand* dividend = UseRegister(instr->left());
   LOperand* divisor = UseRegister(instr->right());
-  LOperand* temp = TempRegister();
   LInstruction* result =
-      DefineAsRegister(new(zone()) LDivI(dividend, divisor, temp));
+      DefineAsRegister(new(zone()) LDivI(dividend, divisor));
   if (instr->CheckFlag(HValue::kCanBeDivByZero) ||
       instr->CheckFlag(HValue::kBailoutOnMinusZero) ||
       (instr->CheckFlag(HValue::kCanOverflow) &&
        !instr->CheckFlag(HValue::kAllUsesTruncatingToInt32)) ||
       (!instr->IsMathFloorOfDiv() &&
        !instr->CheckFlag(HValue::kAllUsesTruncatingToInt32))) {
     result = AssignEnvironment(result);
   }
   return result;
 }
@@ skipping 164 matching lines @@
       }
       right_op = UseRegister(right);
     }
     LMulI* mul = new(zone()) LMulI(left_op, right_op);
     if (can_overflow || bailout_on_minus_zero) {
       AssignEnvironment(mul);
     }
     return DefineAsRegister(mul);
 
   } else if (instr->representation().IsDouble()) {
-    if (IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6)) {
+    if (kArchVariant == kMips32r2) {
       if (instr->HasOneUse() && instr->uses().value()->IsAdd()) {
         HAdd* add = HAdd::cast(instr->uses().value());
         if (instr == add->left()) {
           // This mul is the lhs of an add. The add and mul will be folded
           // into a multiply-add.
           return NULL;
         }
         if (instr == add->right() && !add->left()->IsMul()) {
           // This mul is the rhs of an add, where the lhs is not another mul.
           // The add and mul will be folded into a multiply-add.
@@ skipping 52 matching lines @@
   } else if (instr->representation().IsExternal()) {
     DCHECK(instr->left()->representation().IsExternal());
     DCHECK(instr->right()->representation().IsInteger32());
     DCHECK(!instr->CheckFlag(HValue::kCanOverflow));
     LOperand* left = UseRegisterAtStart(instr->left());
     LOperand* right = UseOrConstantAtStart(instr->right());
     LAddI* add = new(zone()) LAddI(left, right);
     LInstruction* result = DefineAsRegister(add);
     return result;
   } else if (instr->representation().IsDouble()) {
-    if (IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6)) {
+    if (kArchVariant == kMips32r2) {
       if (instr->left()->IsMul())
         return DoMultiplyAdd(HMul::cast(instr->left()), instr->right());
 
       if (instr->right()->IsMul()) {
         DCHECK(!instr->left()->IsMul());
         return DoMultiplyAdd(HMul::cast(instr->right()), instr->left());
       }
     }
     return DoArithmeticD(Token::ADD, instr);
   } else {
@@ skipping 973 matching lines @@
   LOperand* context = UseFixed(instr->context(), cp);
   LOperand* function = UseRegisterAtStart(instr->function());
   LAllocateBlockContext* result =
       new(zone()) LAllocateBlockContext(context, function);
   return MarkAsCall(DefineFixed(result, cp), instr);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS