Version 3.20.11.1

src/ia32/lithium-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 743 matching lines @@
 }
 
 
 LInstruction* LChunkBuilder::DoDeoptimize(HDeoptimize* instr) {
   return AssignEnvironment(new(zone()) LDeoptimize);
 }
 
 
 LInstruction* LChunkBuilder::DoShift(Token::Value op,
                                      HBitwiseBinaryOperation* instr) {
-  if (instr->representation().IsTagged()) {
+  if (instr->representation().IsSmiOrTagged()) {
     ASSERT(instr->left()->representation().IsSmiOrTagged());
     ASSERT(instr->right()->representation().IsSmiOrTagged());
 
     LOperand* context = UseFixed(instr->context(), esi);
     LOperand* left = UseFixed(instr->left(), edx);
     LOperand* right = UseFixed(instr->right(), eax);
     LArithmeticT* result = new(zone()) LArithmeticT(op, context, left, right);
     return MarkAsCall(DefineFixed(result, eax), instr);
   }
 
-  ASSERT(instr->representation().IsSmiOrInteger32());
-  ASSERT(instr->left()->representation().Equals(instr->representation()));
-  ASSERT(instr->right()->representation().Equals(instr->representation()));
+  ASSERT(instr->representation().IsInteger32());
+  ASSERT(instr->left()->representation().IsInteger32());
+  ASSERT(instr->right()->representation().IsInteger32());
   LOperand* left = UseRegisterAtStart(instr->left());
 
   HValue* right_value = instr->right();
   LOperand* right = NULL;
   int constant_value = 0;
-  bool does_deopt = false;
   if (right_value->IsConstant()) {
     HConstant* constant = HConstant::cast(right_value);
     right = chunk_->DefineConstantOperand(constant);
     constant_value = constant->Integer32Value() & 0x1f;
-    // Left shifts can deoptimize if we shift by > 0 and the result cannot be
-    // truncated to smi.
-    if (instr->representation().IsSmi() && constant_value > 0) {
-      for (HUseIterator it(instr->uses()); !it.Done(); it.Advance()) {
-        if (!it.value()->CheckFlag(HValue::kTruncatingToSmi)) {
-          does_deopt = true;
-          break;
-        }
-      }
-    }
   } else {
     right = UseFixed(right_value, ecx);
   }
 
   // Shift operations can only deoptimize if we do a logical shift by 0 and
   // the result cannot be truncated to int32.
+  bool does_deopt = false;
   if (op == Token::SHR && constant_value == 0) {
     if (FLAG_opt_safe_uint32_operations) {
       does_deopt = !instr->CheckFlag(HInstruction::kUint32);
     } else {
       for (HUseIterator it(instr->uses()); !it.Done(); it.Advance()) {
         if (!it.value()->CheckFlag(HValue::kTruncatingToInt32)) {
           does_deopt = true;
           break;
         }
       }
@@ skipping 1325 matching lines @@
   Representation r = instr->representation();
   if (r.IsSmi()) {
     return DefineAsRegister(new(zone()) LConstantS);
   } else if (r.IsInteger32()) {
     return DefineAsRegister(new(zone()) LConstantI);
   } else if (r.IsDouble()) {
     double value = instr->DoubleValue();
     bool value_is_zero = BitCast<uint64_t, double>(value) == 0;
     LOperand* temp = value_is_zero ? NULL : TempRegister();
     return DefineAsRegister(new(zone()) LConstantD(temp));
-  } else if (r.IsExternal()) {
-    return DefineAsRegister(new(zone()) LConstantE);
   } else if (r.IsTagged()) {
     return DefineAsRegister(new(zone()) LConstantT);
   } else {
     UNREACHABLE();
     return NULL;
   }
 }
 
 
 LInstruction* LChunkBuilder::DoLoadGlobalCell(HLoadGlobalCell* instr) {
@@ skipping 56 matching lines @@
   } else {
     value = UseRegister(instr->value());
     temp = NULL;
   }
   LInstruction* result = new(zone()) LStoreContextSlot(context, value, temp);
   return instr->RequiresHoleCheck() ? AssignEnvironment(result) : result;
 }
 
 
 LInstruction* LChunkBuilder::DoLoadNamedField(HLoadNamedField* instr) {
-  LOperand* obj = (instr->access().IsExternalMemory() &&
-                   instr->access().offset() == 0)
-      ? UseRegisterOrConstantAtStart(instr->object())
-      : UseRegisterAtStart(instr->object());
+  LOperand* obj = UseRegisterAtStart(instr->object());
   return DefineAsRegister(new(zone()) LLoadNamedField(obj));
 }
 
 
 LInstruction* LChunkBuilder::DoLoadNamedFieldPolymorphic(
     HLoadNamedFieldPolymorphic* instr) {
   ASSERT(instr->representation().IsTagged());
   if (instr->need_generic()) {
     LOperand* context = UseFixed(instr->context(), esi);
     LOperand* obj = UseFixed(instr->object(), edx);
@@ skipping 172 matching lines @@
     HTransitionElementsKind* instr) {
   LOperand* object = UseRegister(instr->object());
   if (IsSimpleMapChangeTransition(instr->from_kind(), instr->to_kind())) {
     LOperand* object = UseRegister(instr->object());
     LOperand* new_map_reg = TempRegister();
     LOperand* temp_reg = TempRegister();
     LTransitionElementsKind* result =
         new(zone()) LTransitionElementsKind(object, NULL,
                                             new_map_reg, temp_reg);
     return result;
-  } else {
+  } else if (FLAG_compiled_transitions) {
     LOperand* context = UseRegister(instr->context());
     LTransitionElementsKind* result =
         new(zone()) LTransitionElementsKind(object, context, NULL, NULL);
     return AssignPointerMap(result);
+  } else {
+    LOperand* object = UseFixed(instr->object(), eax);
+    LOperand* fixed_object_reg = FixedTemp(edx);
+    LOperand* new_map_reg = FixedTemp(ebx);
+    LTransitionElementsKind* result =
+        new(zone()) LTransitionElementsKind(object,
+                                            NULL,
+                                            new_map_reg,
+                                            fixed_object_reg);
+    return MarkAsCall(result, instr);
   }
 }
 
 
 LInstruction* LChunkBuilder::DoTrapAllocationMemento(
     HTrapAllocationMemento* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* temp = TempRegister();
   LTrapAllocationMemento* result =
       new(zone()) LTrapAllocationMemento(object, temp);
   return AssignEnvironment(result);
 }
 
 
 LInstruction* LChunkBuilder::DoStoreNamedField(HStoreNamedField* instr) {
   bool is_in_object = instr->access().IsInobject();
-  bool is_external_location = instr->access().IsExternalMemory() &&
-      instr->access().offset() == 0;
   bool needs_write_barrier = instr->NeedsWriteBarrier();
   bool needs_write_barrier_for_map = !instr->transition().is_null() &&
       instr->NeedsWriteBarrierForMap();
 
   LOperand* obj;
   if (needs_write_barrier) {
     obj = is_in_object
         ? UseRegister(instr->object())
         : UseTempRegister(instr->object());
-  } else if (is_external_location) {
-    ASSERT(!is_in_object);
-    ASSERT(!needs_write_barrier);
-    ASSERT(!needs_write_barrier_for_map);
-    obj = UseRegisterOrConstant(instr->object());
   } else {
     obj = needs_write_barrier_for_map
         ? UseRegister(instr->object())
         : UseRegisterAtStart(instr->object());
   }
 
   bool can_be_constant = instr->value()->IsConstant() &&
       HConstant::cast(instr->value())->NotInNewSpace() &&
       !(FLAG_track_double_fields && instr->field_representation().IsDouble());
 
@@ skipping 307 matching lines @@
 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseTempRegister(instr->index());
   return DefineSameAsFirst(new(zone()) LLoadFieldByIndex(object, index));
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32