Externalize deoptimization reasons.

src/hydrogen.cc

 // Copyright 2013 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/hydrogen.h"
 
 #include <sstream>
 
 #include "src/v8.h"
 
@@ skipping 913 matching lines @@
   DCHECK(did_then_);
   DCHECK(!captured_);
   DCHECK(!finished_);
   AddMergeAtJoinBlock(false);
   builder()->set_current_block(first_false_block_);
   pending_merge_block_ = true;
   did_else_ = true;
 }
 
 
-void HGraphBuilder::IfBuilder::Deopt(const char* reason) {
+void HGraphBuilder::IfBuilder::Deopt(Deoptimizer::DeoptReason reason) {
   DCHECK(did_then_);
   builder()->Add<HDeoptimize>(reason, Deoptimizer::EAGER);
   AddMergeAtJoinBlock(true);
 }
 
 
 void HGraphBuilder::IfBuilder::Return(HValue* value) {
   HValue* parameter_count = builder()->graph()->GetConstantMinus1();
   builder()->FinishExitCurrentBlock(
       builder()->New<HReturn>(value, parameter_count));
@@ skipping 321 matching lines @@
   return BuildDecodeField<Map::ElementsKindBits>(bit_field2);
 }
 
 
 HValue* HGraphBuilder::BuildCheckHeapObject(HValue* obj) {
   if (obj->type().IsHeapObject()) return obj;
   return Add<HCheckHeapObject>(obj);
 }
 
 
-void HGraphBuilder::FinishExitWithHardDeoptimization(const char* reason) {
+void HGraphBuilder::FinishExitWithHardDeoptimization(
+    Deoptimizer::DeoptReason reason) {
   Add<HDeoptimize>(reason, Deoptimizer::EAGER);
   FinishExitCurrentBlock(New<HAbnormalExit>());
 }
 
 
 HValue* HGraphBuilder::BuildCheckString(HValue* string) {
   if (!string->type().IsString()) {
     DCHECK(!string->IsConstant() ||
            !HConstant::cast(string)->HasStringValue());
     BuildCheckHeapObject(string);
@@ skipping 295 matching lines @@
   HValue* max_global_type = Add<HConstant>(JS_BUILTINS_OBJECT_TYPE);
 
   IfBuilder if_global_object(this);
   if_global_object.If<HCompareNumericAndBranch>(instance_type,
                                                 max_global_type,
                                                 Token::LTE);
   if_global_object.And();
   if_global_object.If<HCompareNumericAndBranch>(instance_type,
                                                 min_global_type,
                                                 Token::GTE);
-  if_global_object.ThenDeopt("receiver was a global object");
+  if_global_object.ThenDeopt(Deoptimizer::kReceiverWasAGlobalObject);
   if_global_object.End();
 }
 
 
 void HGraphBuilder::BuildTestForDictionaryProperties(
     HValue* object,
     HIfContinuation* continuation) {
   HValue* properties = Add<HLoadNamedField>(
       object, nullptr, HObjectAccess::ForPropertiesPointer());
   HValue* properties_map =
@@ skipping 309 matching lines @@
     if_objectiskey.Then();
     {
       // Make the key_index available.
       Push(key_index);
     }
     if_objectiskey.JoinContinuation(&found);
   }
   if_objectissmi.Else();
   {
     if (type->Is(Type::SignedSmall())) {
-      if_objectissmi.Deopt("Expected smi");
+      if_objectissmi.Deopt(Deoptimizer::kExpectedSmi);
     } else {
       // Check if the object is a heap number.
       IfBuilder if_objectisnumber(this);
       HValue* objectisnumber = if_objectisnumber.If<HCompareMap>(
           object, isolate()->factory()->heap_number_map());
       if_objectisnumber.Then();
       {
         // Compute hash for heap number similar to double_get_hash().
         HValue* low = Add<HLoadNamedField>(
             object, objectisnumber,
@@ skipping 34 matching lines @@
             }
             if_keyeqobject.JoinContinuation(&found);
           }
           if_keyisheapnumber.JoinContinuation(&found);
         }
         if_keyisnotsmi.JoinContinuation(&found);
       }
       if_objectisnumber.Else();
       {
         if (type->Is(Type::Number())) {
-          if_objectisnumber.Deopt("Expected heap number");
+          if_objectisnumber.Deopt(Deoptimizer::kExpectedHeapNumber);
         }
       }
       if_objectisnumber.JoinContinuation(&found);
     }
   }
   if_objectissmi.JoinContinuation(&found);
 
   // Check for cache hit.
   IfBuilder if_found(this, &found);
   if_found.Then();
@@ skipping 452 matching lines @@
       NoObservableSideEffectsScope no_effects(this);
       IfBuilder length_checker(this);
       length_checker.If<HCompareNumericAndBranch>(key, length, Token::LT);
       length_checker.Then();
       IfBuilder negative_checker(this);
       HValue* bounds_check = negative_checker.If<HCompareNumericAndBranch>(
           key, graph()->GetConstant0(), Token::GTE);
       negative_checker.Then();
       HInstruction* result = AddElementAccess(
           backing_store, key, val, bounds_check, elements_kind, access_type);
-      negative_checker.ElseDeopt("Negative key encountered");
+      negative_checker.ElseDeopt(Deoptimizer::kNegativeKeyEncountered);
       negative_checker.End();
       length_checker.End();
       return result;
     } else {
       DCHECK(store_mode == STANDARD_STORE);
       checked_key = Add<HBoundsCheck>(key, length);
       return AddElementAccess(
           backing_store, checked_key, val,
           checked_object, elements_kind, access_type);
     }
@@ skipping 64 matching lines @@
                                           Token::EQ);
   if_builder.Then();
   const int initial_capacity = JSArray::kPreallocatedArrayElements;
   HConstant* initial_capacity_node = Add<HConstant>(initial_capacity);
   Push(initial_capacity_node);  // capacity
   Push(constant_zero);          // length
   if_builder.Else();
   if (!(top_info()->IsStub()) &&
       IsFastPackedElementsKind(array_builder->kind())) {
     // We'll come back later with better (holey) feedback.
-    if_builder.Deopt("Holey array despite packed elements_kind feedback");
+    if_builder.Deopt(
+        Deoptimizer::kHoleyArrayDespitePackedElements_kindFeedback);
   } else {
     Push(checked_length);         // capacity
     Push(checked_length);         // length
   }
   if_builder.End();
 
   // Figure out total size
   HValue* length = Pop();
   HValue* capacity = Pop();
   return array_builder->AllocateArray(capacity, max_alloc_length, length);
@@ skipping 518 matching lines @@
       // emitted below is the actual monomorphic map.
       if (map_embedding == kEmbedMapsViaWeakCells) {
         HValue* cell =
             Add<HConstant>(Map::WeakCellForMap(type->Classes().Current()));
         HValue* expected_map = Add<HLoadNamedField>(
             cell, nullptr, HObjectAccess::ForWeakCellValue());
         HValue* map =
             Add<HLoadNamedField>(value, nullptr, HObjectAccess::ForMap());
         IfBuilder map_check(this);
         map_check.IfNot<HCompareObjectEqAndBranch>(expected_map, map);
-        map_check.ThenDeopt("Unknown map");
+        map_check.ThenDeopt(Deoptimizer::kUnknownMap);
         map_check.End();
       } else {
         DCHECK(map_embedding == kEmbedMapsDirectly);
         Add<HCheckMaps>(value, type->Classes().Current());
       }
     } else {
-      if_nil.Deopt("Too many undetectable types");
+      if_nil.Deopt(Deoptimizer::kTooManyUndetectableTypes);
     }
   }
 
   if_nil.CaptureContinuation(continuation);
 }
 
 
 void HGraphBuilder::BuildCreateAllocationMemento(
     HValue* previous_object,
     HValue* previous_object_size,
@@ skipping 3312 matching lines @@
     }
 
     if (current_block() != NULL) Goto(join);
     set_current_block(if_false);
   }
 
   // Finish up.  Unconditionally deoptimize if we've handled all the maps we
   // know about and do not want to handle ones we've never seen.  Otherwise
   // use a generic IC.
   if (count == types->length() && FLAG_deoptimize_uncommon_cases) {
-    FinishExitWithHardDeoptimization("Unknown map in polymorphic access");
+    FinishExitWithHardDeoptimization(
+        Deoptimizer::kUnknownMapInPolymorphicAccess);
   } else {
     HInstruction* instr = BuildNamedGeneric(access_type, expr, object, name,
                                             value);
     AddInstruction(instr);
     if (!ast_context()->IsEffect()) Push(access_type == LOAD ? instr : value);
 
     if (join != NULL) {
       Goto(join);
     } else {
       Add<HSimulate>(ast_id, REMOVABLE_SIMULATE);
@@ skipping 126 matching lines @@
 
   LookupIterator it(global, var->name(), LookupIterator::OWN_SKIP_INTERCEPTOR);
   GlobalPropertyAccess type = LookupGlobalProperty(var, &it, STORE);
   if (type == kUseCell) {
     Handle<PropertyCell> cell = it.GetPropertyCell();
     if (cell->type()->IsConstant()) {
       Handle<Object> constant = cell->type()->AsConstant()->Value();
       if (value->IsConstant()) {
         HConstant* c_value = HConstant::cast(value);
         if (!constant.is_identical_to(c_value->handle(isolate()))) {
-          Add<HDeoptimize>("Constant global variable assignment",
+          Add<HDeoptimize>(Deoptimizer::kConstantGlobalVariableAssignment,
                            Deoptimizer::EAGER);
         }
       } else {
         HValue* c_constant = Add<HConstant>(constant);
         IfBuilder builder(this);
         if (constant->IsNumber()) {
           builder.If<HCompareNumericAndBranch>(value, c_constant, Token::EQ);
         } else {
           builder.If<HCompareObjectEqAndBranch>(value, c_constant);
         }
         builder.Then();
         builder.Else();
-        Add<HDeoptimize>("Constant global variable assignment",
+        Add<HDeoptimize>(Deoptimizer::kConstantGlobalVariableAssignment,
                          Deoptimizer::EAGER);
         builder.End();
       }
     }
     HInstruction* instr =
         Add<HStoreGlobalCell>(value, cell, it.property_details());
     if (instr->HasObservableSideEffects()) {
       Add<HSimulate>(ast_id, REMOVABLE_SIMULATE);
     }
   } else {
@@ skipping 300 matching lines @@
 
 
 HInstruction* HOptimizedGraphBuilder::BuildNamedGeneric(
     PropertyAccessType access_type,
     Expression* expr,
     HValue* object,
     Handle<String> name,
     HValue* value,
     bool is_uninitialized) {
   if (is_uninitialized) {
-    Add<HDeoptimize>("Insufficient type feedback for generic named access",
-                     Deoptimizer::SOFT);
+    Add<HDeoptimize>(
+        Deoptimizer::kInsufficientTypeFeedbackForGenericNamedAccess,
+        Deoptimizer::SOFT);
   }
   if (access_type == LOAD) {
     HLoadNamedGeneric* result = New<HLoadNamedGeneric>(object, name);
     if (FLAG_vector_ics) {
       Handle<SharedFunctionInfo> current_shared =
           function_state()->compilation_info()->shared_info();
       Handle<TypeFeedbackVector> vector =
           handle(current_shared->feedback_vector(), isolate());
       FeedbackVectorICSlot slot = expr->AsProperty()->PropertyFeedbackSlot();
       result->SetVectorAndSlot(vector, slot);
@@ skipping 279 matching lines @@
     set_current_block(other_map);
   }
 
   // Ensure that we visited at least one map above that goes to join. This is
   // necessary because FinishExitWithHardDeoptimization does an AbnormalExit
   // rather than joining the join block. If this becomes an issue, insert a
   // generic access in the case length() == 0.
   DCHECK(join->predecessors()->length() > 0);
   // Deopt if none of the cases matched.
   NoObservableSideEffectsScope scope(this);
-  FinishExitWithHardDeoptimization("Unknown map in polymorphic element access");
+  FinishExitWithHardDeoptimization(
+      Deoptimizer::kUnknownMapInPolymorphicElementAccess);
   set_current_block(join);
   return access_type == STORE ? val : Pop();
 }
 
 
 HValue* HOptimizedGraphBuilder::HandleKeyedElementAccess(
     HValue* obj, HValue* key, HValue* val, Expression* expr, BailoutId ast_id,
     BailoutId return_id, PropertyAccessType access_type,
     bool* has_side_effects) {
   // TODO(mvstanton): This optimization causes trouble for vector-based
@@ skipping 74 matching lines @@
           obj, key, val, NULL, map, access_type, expr->GetStoreMode());
     }
   } else if (!force_generic && (types != NULL && !types->is_empty())) {
     return HandlePolymorphicElementAccess(
         expr, obj, key, val, types, access_type,
         expr->GetStoreMode(), has_side_effects);
   } else {
     if (access_type == STORE) {
       if (expr->IsAssignment() &&
           expr->AsAssignment()->HasNoTypeInformation()) {
-        Add<HDeoptimize>("Insufficient type feedback for keyed store",
+        Add<HDeoptimize>(Deoptimizer::kInsufficientTypeFeedbackForKeyedStore,
                          Deoptimizer::SOFT);
       }
     } else {
       if (expr->AsProperty()->HasNoTypeInformation()) {
-        Add<HDeoptimize>("Insufficient type feedback for keyed load",
+        Add<HDeoptimize>(Deoptimizer::kInsufficientTypeFeedbackForKeyedLoad,
                          Deoptimizer::SOFT);
       }
     }
     instr = AddInstruction(BuildKeyedGeneric(access_type, expr, obj, key, val));
   }
   *has_side_effects = instr->HasObservableSideEffects();
   return instr;
 }
 
 
@@ skipping 424 matching lines @@
     }
 
     if (current_block() != NULL) Goto(join);
     set_current_block(if_false);
   }
 
   // Finish up.  Unconditionally deoptimize if we've handled all the maps we
   // know about and do not want to handle ones we've never seen.  Otherwise
   // use a generic IC.
   if (ordered_functions == types->length() && FLAG_deoptimize_uncommon_cases) {
-    FinishExitWithHardDeoptimization("Unknown map in polymorphic call");
+    FinishExitWithHardDeoptimization(Deoptimizer::kUnknownMapInPolymorphicCall);
   } else {
     Property* prop = expr->expression()->AsProperty();
     HInstruction* function = BuildNamedGeneric(
         LOAD, prop, receiver, name, NULL, prop->IsUninitialized());
     AddInstruction(function);
     Push(function);
     AddSimulate(prop->LoadId(), REMOVABLE_SIMULATE);
 
     environment()->SetExpressionStackAt(1, function);
     environment()->SetExpressionStackAt(0, receiver);
@@ skipping 1488 matching lines @@
         return;
       } else {
         call = BuildCallConstantFunction(known_function, argument_count);
       }
 
     } else {
       ArgumentsAllowedFlag arguments_flag = ARGUMENTS_NOT_ALLOWED;
       if (CanBeFunctionApplyArguments(expr) && expr->is_uninitialized()) {
         // We have to use EAGER deoptimization here because Deoptimizer::SOFT
         // gets ignored by the always-opt flag, which leads to incorrect code.
-        Add<HDeoptimize>("Insufficient type feedback for call with arguments",
-                         Deoptimizer::EAGER);
+        Add<HDeoptimize>(
+            Deoptimizer::kInsufficientTypeFeedbackForCallWithArguments,
+            Deoptimizer::EAGER);
         arguments_flag = ARGUMENTS_FAKED;
       }
 
       // Push the function under the receiver.
       environment()->SetExpressionStackAt(0, function);
       Push(receiver);
 
       CHECK_ALIVE(VisitExpressions(expr->arguments(), arguments_flag));
       CallFunctionFlags flags = receiver->type().IsJSObject()
           ? NO_CALL_FUNCTION_FLAGS : CALL_AS_METHOD;
@@ skipping 1197 matching lines @@
   Representation left_rep = Representation::FromType(left_type);
   Representation right_rep = Representation::FromType(right_type);
 
   bool maybe_string_add = op == Token::ADD &&
                           (left_type->Maybe(Type::String()) ||
                            left_type->Maybe(Type::Receiver()) ||
                            right_type->Maybe(Type::String()) ||
                            right_type->Maybe(Type::Receiver()));
 
   if (!left_type->IsInhabited()) {
-    Add<HDeoptimize>("Insufficient type feedback for LHS of binary operation",
-                     Deoptimizer::SOFT);
+    Add<HDeoptimize>(
+        Deoptimizer::kInsufficientTypeFeedbackForLHSOfBinaryOperation,
+        Deoptimizer::SOFT);
     // TODO(rossberg): we should be able to get rid of non-continuous
     // defaults.
     left_type = Type::Any(zone());
   } else {
     if (!maybe_string_add) left = TruncateToNumber(left, &left_type);
     left_rep = Representation::FromType(left_type);
   }
 
   if (!right_type->IsInhabited()) {
-    Add<HDeoptimize>("Insufficient type feedback for RHS of binary operation",
-                     Deoptimizer::SOFT);
+    Add<HDeoptimize>(
+        Deoptimizer::kInsufficientTypeFeedbackForRHSOfBinaryOperation,
+        Deoptimizer::SOFT);
     right_type = Type::Any(zone());
   } else {
     if (!maybe_string_add) right = TruncateToNumber(right, &right_type);
     right_rep = Representation::FromType(right_type);
   }
 
   // Special case for string addition here.
   if (op == Token::ADD &&
       (left_type->Is(Type::String()) || right_type->Is(Type::String()))) {
     // Validate type feedback for left argument.
@@ skipping 99 matching lines @@
         instr = AddUncasted<HMul>(left, right);
         break;
       case Token::MOD: {
         if (fixed_right_arg.has_value &&
             !right->EqualsInteger32Constant(fixed_right_arg.value)) {
           HConstant* fixed_right = Add<HConstant>(
               static_cast<int>(fixed_right_arg.value));
           IfBuilder if_same(this);
           if_same.If<HCompareNumericAndBranch>(right, fixed_right, Token::EQ);
           if_same.Then();
-          if_same.ElseDeopt("Unexpected RHS of binary operation");
+          if_same.ElseDeopt(Deoptimizer::kUnexpectedRHSOfBinaryOperation);
           right = fixed_right;
         }
         instr = AddUncasted<HMod>(left, right);
         break;
       }
       case Token::DIV:
         instr = AddUncasted<HDiv>(left, right);
         break;
       case Token::BIT_XOR:
       case Token::BIT_AND:
@@ skipping 353 matching lines @@
     Type* left_type,
     Type* right_type,
     Type* combined_type,
     HSourcePosition left_position,
     HSourcePosition right_position,
     PushBeforeSimulateBehavior push_sim_result,
     BailoutId bailout_id) {
   // Cases handled below depend on collected type feedback. They should
   // soft deoptimize when there is no type feedback.
   if (!combined_type->IsInhabited()) {
-    Add<HDeoptimize>("Insufficient type feedback for combined type "
-                     "of binary operation",
-                     Deoptimizer::SOFT);
+    Add<HDeoptimize>(
+        Deoptimizer::kInsufficientTypeFeedbackForCombinedTypeOfBinaryOperation,
+        Deoptimizer::SOFT);
     combined_type = left_type = right_type = Type::Any(zone());
   }
 
   Representation left_rep = Representation::FromType(left_type);
   Representation right_rep = Representation::FromType(right_type);
   Representation combined_rep = Representation::FromType(combined_type);
 
   if (combined_type->Is(Type::Receiver())) {
     if (Token::IsEqualityOp(op)) {
       // HCompareObjectEqAndBranch can only deal with object, so
       // exclude numbers.
       if ((left->IsConstant() &&
            HConstant::cast(left)->HasNumberValue()) ||
           (right->IsConstant() &&
            HConstant::cast(right)->HasNumberValue())) {
-        Add<HDeoptimize>("Type mismatch between feedback and constant",
+        Add<HDeoptimize>(Deoptimizer::kTypeMismatchBetweenFeedbackAndConstant,
                          Deoptimizer::SOFT);
         // The caller expects a branch instruction, so make it happy.
         return New<HBranch>(graph()->GetConstantTrue());
       }
       // Can we get away with map check and not instance type check?
       HValue* operand_to_check =
           left->block()->block_id() < right->block()->block_id() ? left : right;
       if (combined_type->IsClass()) {
         Handle<Map> map = combined_type->AsClass()->Map();
         AddCheckMap(operand_to_check, map);
@@ skipping 17 matching lines @@
       return NULL;
     }
   } else if (combined_type->Is(Type::InternalizedString()) &&
              Token::IsEqualityOp(op)) {
     // If we have a constant argument, it should be consistent with the type
     // feedback (otherwise we fail assertions in HCompareObjectEqAndBranch).
     if ((left->IsConstant() &&
          !HConstant::cast(left)->HasInternalizedStringValue()) ||
         (right->IsConstant() &&
          !HConstant::cast(right)->HasInternalizedStringValue())) {
-      Add<HDeoptimize>("Type mismatch between feedback and constant",
+      Add<HDeoptimize>(Deoptimizer::kTypeMismatchBetweenFeedbackAndConstant,
                        Deoptimizer::SOFT);
       // The caller expects a branch instruction, so make it happy.
       return New<HBranch>(graph()->GetConstantTrue());
     }
     BuildCheckHeapObject(left);
     Add<HCheckInstanceType>(left, HCheckInstanceType::IS_INTERNALIZED_STRING);
     BuildCheckHeapObject(right);
     Add<HCheckInstanceType>(right, HCheckInstanceType::IS_INTERNALIZED_STRING);
     HCompareObjectEqAndBranch* result =
         New<HCompareObjectEqAndBranch>(left, right);
@@ skipping 2428 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal