[turbofan] Introduce CheckIf simplified operator.

src/compiler/js-global-object-specialization.cc

 // Copyright 2015 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/compiler/js-global-object-specialization.h"
 
 #include "src/compilation-dependencies.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/js-graph.h"
@@ skipping 115 matching lines @@
   return Replace(value);
 }
 
 
 Reduction JSGlobalObjectSpecialization::ReduceJSStoreGlobal(Node* node) {
   DCHECK_EQ(IrOpcode::kJSStoreGlobal, node->opcode());
   Handle<Name> name = StoreGlobalParametersOf(node->op()).name();
   Node* value = NodeProperties::GetValueInput(node, 0);
   Node* effect = NodeProperties::GetEffectInput(node);
   Node* control = NodeProperties::GetControlInput(node);
-  Node* frame_state = NodeProperties::FindFrameStateBefore(node);
 
   // Retrieve the global object from the given {node}.
   Handle<JSGlobalObject> global_object;
   if (!GetGlobalObject(node).ToHandle(&global_object)) return NoChange();
 
   // Try to lookup the name on the script context table first (lexical scoping).
   ScriptContextTableLookupResult result;
   if (LookupInScriptContextTable(global_object, name, &result)) {
     if (result.context->is_the_hole(result.index)) return NoChange();
     if (result.immutable) return NoChange();
@@ skipping 19 matching lines @@
     case PropertyCellType::kUndefined: {
       return NoChange();
     }
     case PropertyCellType::kConstant: {
       // Record a code dependency on the cell, and just deoptimize if the new
       // value doesn't match the previous value stored inside the cell.
       dependencies()->AssumePropertyCell(property_cell);
       Node* check =
           graph()->NewNode(simplified()->ReferenceEqual(Type::Tagged()), value,
                            jsgraph()->Constant(property_cell_value));
-      control = effect = graph()->NewNode(common()->DeoptimizeUnless(), check,
-                                          frame_state, effect, control);
+      effect =
+          graph()->NewNode(simplified()->CheckIf(), check, effect, control);
       break;
     }
     case PropertyCellType::kConstantType: {
       // Record a code dependency on the cell, and just deoptimize if the new
       // values' type doesn't match the type of the previous value in the cell.
       dependencies()->AssumePropertyCell(property_cell);
-      Node* check = graph()->NewNode(simplified()->ObjectIsSmi(), value);
-      Type* property_cell_value_type = Type::TaggedSigned();
+      Type* property_cell_value_type;
       if (property_cell_value->IsHeapObject()) {
-        // Deoptimize if the {value} is a Smi.
-        control = effect = graph()->NewNode(common()->DeoptimizeIf(), check,
-                                            frame_state, effect, control);
+        // Check that the {value} is a HeapObject.
+        value = effect = graph()->NewNode(simplified()->CheckTaggedPointer(),
+                                          value, effect, control);
 
         // Load the {value} map check against the {property_cell} map.
         Node* value_map = effect =
             graph()->NewNode(simplified()->LoadField(AccessBuilder::ForMap()),
                              value, effect, control);
         Handle<Map> property_cell_value_map(
             Handle<HeapObject>::cast(property_cell_value)->map(), isolate());
-        check = graph()->NewNode(
+        Node* check = graph()->NewNode(
             simplified()->ReferenceEqual(Type::Any()), value_map,
             jsgraph()->HeapConstant(property_cell_value_map));
+        effect =
+            graph()->NewNode(simplified()->CheckIf(), check, effect, control);
         property_cell_value_type = Type::TaggedPointer();
+      } else {
+        // Check that the {value} is a Smi.
+        value = effect = graph()->NewNode(simplified()->CheckTaggedSigned(),
+                                          value, effect, control);
+        property_cell_value_type = Type::TaggedSigned();
       }
-      control = effect = graph()->NewNode(common()->DeoptimizeUnless(), check,
-                                          frame_state, effect, control);
       effect = graph()->NewNode(
           simplified()->StoreField(
               AccessBuilder::ForPropertyCellValue(property_cell_value_type)),
           jsgraph()->HeapConstant(property_cell), value, effect, control);
       break;
     }
     case PropertyCellType::kMutable: {
       // Store to non-configurable, data property on the global can be lowered
       // to a field store, even without recording a code dependency on the cell,
       // because the property cannot be deleted or reconfigured to an accessor
@@ skipping 61 matching lines @@
 }
 
 
 SimplifiedOperatorBuilder* JSGlobalObjectSpecialization::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8