Version 3.20.11.1

src/mips/lithium-mips.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 695 matching lines @@
 }
 
 
 LInstruction* LChunkBuilder::DoDeoptimize(HDeoptimize* instr) {
   return AssignEnvironment(new(zone()) LDeoptimize);
 }
 
 
 LInstruction* LChunkBuilder::DoShift(Token::Value op,
                                      HBitwiseBinaryOperation* instr) {
-  if (instr->representation().IsTagged()) {
-    ASSERT(instr->left()->representation().IsTagged());
-    ASSERT(instr->right()->representation().IsTagged());
+  if (instr->representation().IsSmiOrTagged()) {
+    ASSERT(instr->left()->representation().IsSmiOrTagged());
+    ASSERT(instr->right()->representation().IsSmiOrTagged());
 
     LOperand* left = UseFixed(instr->left(), a1);
     LOperand* right = UseFixed(instr->right(), a0);
     LArithmeticT* result = new(zone()) LArithmeticT(op, left, right);
     return MarkAsCall(DefineFixed(result, v0), 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 = UseRegisterAtStart(right_value);
   }
 
-  // Shift operations can deoptimize if we do a logical shift
+  // 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 1245 matching lines @@
 
 
 LInstruction* LChunkBuilder::DoConstant(HConstant* instr) {
   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()) {
     return DefineAsRegister(new(zone()) LConstantD);
-  } 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 208 matching lines @@
   return MarkAsCall(new(zone()) LStoreKeyedGeneric(obj, key, val), instr);
 }
 
 
 LInstruction* LChunkBuilder::DoTransitionElementsKind(
     HTransitionElementsKind* instr) {
   LOperand* object = UseRegister(instr->object());
   if (IsSimpleMapChangeTransition(instr->from_kind(), instr->to_kind())) {
     LOperand* new_map_reg = TempRegister();
     LTransitionElementsKind* result =
-        new(zone()) LTransitionElementsKind(object, new_map_reg);
+        new(zone()) LTransitionElementsKind(object, new_map_reg, NULL);
     return result;
+  } else if (FLAG_compiled_transitions) {
+    LTransitionElementsKind* result =
+        new(zone()) LTransitionElementsKind(object, NULL, NULL);
+    return AssignPointerMap(result);
   } else {
+    LOperand* object = UseFixed(instr->object(), a0);
+    LOperand* fixed_object_reg = FixedTemp(a2);
+    LOperand* new_map_reg = FixedTemp(a3);
     LTransitionElementsKind* result =
-        new(zone()) LTransitionElementsKind(object, NULL);
-    return AssignPointerMap(result);
+        new(zone()) LTransitionElementsKind(object,
+                                            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);
@@ skipping 296 matching lines @@
 
 
 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseRegister(instr->index());
   return DefineAsRegister(new(zone()) LLoadFieldByIndex(object, index));
 }
 
 
 } }  // namespace v8::internal