Revert of [compiler] Properly guard the speculative optimizations for instanceof.

src/compiler/effect-control-linearizer.cc

Index: src/compiler/effect-control-linearizer.cc
diff --git a/src/compiler/effect-control-linearizer.cc b/src/compiler/effect-control-linearizer.cc
index 24142cb9b17cce445abdc432881f1b9ecdd3cda8..43d260153ca4d9e56ceb570acb5c24ad349d1ef1 100644
--- a/src/compiler/effect-control-linearizer.cc
+++ b/src/compiler/effect-control-linearizer.cc
@@ -639,10 +639,6 @@
     case IrOpcode::kCheckHeapObject:
       state = LowerCheckHeapObject(node, frame_state, *effect, *control);
       break;
-    case IrOpcode::kCheckHasInPrototypeChain:
-      state =
-          LowerCheckHasInPrototypeChain(node, frame_state, *effect, *control);
-      break;
     case IrOpcode::kCheckedInt32Add:
       state = LowerCheckedInt32Add(node, frame_state, *effect, *control);
       break;
@@ -1321,99 +1317,13 @@
 }
 
 EffectControlLinearizer::ValueEffectControl
-EffectControlLinearizer::LowerCheckHasInPrototypeChain(Node* node,
-                                                       Node* frame_state,
-                                                       Node* effect,
-                                                       Node* control) {
-  Node* object = node->InputAt(0);
-  Node* prototype = node->InputAt(1);
-
-  Node* check0 = ObjectIsSmi(object);
-  Node* branch0 =
-      graph()->NewNode(common()->Branch(BranchHint::kFalse), check0, control);
-
-  Node* if_true0 = graph()->NewNode(common()->IfTrue(), branch0);
-  Node* etrue0 = effect;
-  Node* vtrue0 = jsgraph()->Int32Constant(0);
-
-  control = graph()->NewNode(common()->IfFalse(), branch0);
-
-  // Loop through the {object}s prototype chain looking for the {prototype}.
-  Node* loop = control = graph()->NewNode(common()->Loop(2), control, control);
-  Node* eloop = effect =
-      graph()->NewNode(common()->EffectPhi(2), effect, effect, loop);
-  Node* vloop = object = graph()->NewNode(
-      common()->Phi(MachineRepresentation::kTagged, 2), object, object, loop);
-
-  // Load the {object} map and instance type.
-  Node* object_map = effect =
-      graph()->NewNode(simplified()->LoadField(AccessBuilder::ForMap()), object,
-                       effect, control);
-  Node* object_instance_type = effect = graph()->NewNode(
-      simplified()->LoadField(AccessBuilder::ForMapInstanceType()), object_map,
-      effect, control);
-
-  // Check if the {object} is a special receiver, because for special
-  // receivers, i.e. proxies or API objects that need access checks,
-  // we have to use the %HasInPrototypeChain runtime function instead.
-  Node* check1 =
-      graph()->NewNode(machine()->Uint32LessThanOrEqual(), object_instance_type,
-                       jsgraph()->Uint32Constant(LAST_SPECIAL_RECEIVER_TYPE));
-  Node* branch1 =
-      graph()->NewNode(common()->Branch(BranchHint::kFalse), check1, control);
-
-  control = graph()->NewNode(common()->IfFalse(), branch1);
-
-  Node* if_true1 = graph()->NewNode(common()->IfTrue(), branch1);
-  Node* etrue1 = effect;
-  Node* vtrue1 = jsgraph()->Int32Constant(0);
-
-  // Check if the {object} is not a receiver at all.
-  Node* check10 =
-      graph()->NewNode(machine()->Uint32LessThan(), object_instance_type,
-                       jsgraph()->Uint32Constant(FIRST_JS_RECEIVER_TYPE));
-  if_true1 = etrue1 = graph()->NewNode(
-      common()->DeoptimizeUnless(DeoptimizeReason::kUnexpectedObject), check10,
-      frame_state, etrue1, if_true1);
-
-  // Load the {object} prototype.
-  Node* object_prototype = effect = graph()->NewNode(
-      simplified()->LoadField(AccessBuilder::ForMapPrototype()), object_map,
-      effect, control);
-
-  // Check if we reached the end of {object}s prototype chain.
-  Node* check2 = graph()->NewNode(machine()->WordEqual(), object_prototype,
-                                  jsgraph()->NullConstant());
-  Node* branch2 = graph()->NewNode(common()->Branch(), check2, control);
-
-  Node* if_true2 = graph()->NewNode(common()->IfTrue(), branch2);
-  Node* etrue2 = effect;
-  Node* vtrue2 = jsgraph()->Int32Constant(0);
-
-  control = graph()->NewNode(common()->IfFalse(), branch2);
-
-  // Check if we reached the {prototype}.
-  Node* check3 =
-      graph()->NewNode(machine()->WordEqual(), object_prototype, prototype);
-  Node* branch3 = graph()->NewNode(common()->Branch(), check3, control);
-
-  Node* if_true3 = graph()->NewNode(common()->IfTrue(), branch3);
-  Node* etrue3 = effect;
-  Node* vtrue3 = jsgraph()->Int32Constant(1);
-
-  control = graph()->NewNode(common()->IfFalse(), branch3);
-
-  // Close the loop.
-  vloop->ReplaceInput(1, object_prototype);
-  eloop->ReplaceInput(1, effect);
-  loop->ReplaceInput(1, control);
-
-  control = graph()->NewNode(common()->Merge(4), if_true0, if_true1, if_true2,
-                             if_true3);
-  effect = graph()->NewNode(common()->EffectPhi(4), etrue0, etrue1, etrue2,
-                            etrue3, control);
-  Node* value = graph()->NewNode(common()->Phi(MachineRepresentation::kBit, 4),
-                                 vtrue0, vtrue1, vtrue2, vtrue3, control);
+EffectControlLinearizer::LowerCheckIf(Node* node, Node* frame_state,
+                                      Node* effect, Node* control) {
+  Node* value = node->InputAt(0);
+
+  control = effect =
+      graph()->NewNode(common()->DeoptimizeUnless(DeoptimizeReason::kNoReason),
+                       value, frame_state, effect, control);
 
   return ValueEffectControl(value, effect, control);
 }
@@ -1427,18 +1337,6 @@
   control = effect =
       graph()->NewNode(common()->DeoptimizeIf(DeoptimizeReason::kSmi), check,
                        frame_state, effect, control);
-
-  return ValueEffectControl(value, effect, control);
-}
-
-EffectControlLinearizer::ValueEffectControl
-EffectControlLinearizer::LowerCheckIf(Node* node, Node* frame_state,
-                                      Node* effect, Node* control) {
-  Node* value = node->InputAt(0);
-
-  control = effect =
-      graph()->NewNode(common()->DeoptimizeUnless(DeoptimizeReason::kNoReason),
-                       value, frame_state, effect, control);
 
   return ValueEffectControl(value, effect, control);
 }