Revert of [turbofan] Introduce CheckUnless.

src/compiler/effect-control-linearizer.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/effect-control-linearizer.h"
 
 #include "src/code-factory.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/linkage.h"
@@ skipping 440 matching lines @@
       break;
     case IrOpcode::kObjectIsUndetectable:
       state = LowerObjectIsUndetectable(node, *effect, *control);
       break;
     case IrOpcode::kStringFromCharCode:
       state = LowerStringFromCharCode(node, *effect, *control);
       break;
     case IrOpcode::kCheckIf:
       state = LowerCheckIf(node, frame_state, *effect, *control);
       break;
-    case IrOpcode::kCheckUnless:
-      state = LowerCheckUnless(node, frame_state, *effect, *control);
-      break;
     case IrOpcode::kCheckFloat64Hole:
       state = LowerCheckFloat64Hole(node, frame_state, *effect, *control);
       break;
     case IrOpcode::kCheckTaggedHole:
       state = LowerCheckTaggedHole(node, frame_state, *effect, *control);
       break;
     case IrOpcode::kPlainPrimitiveToNumber:
       state = LowerPlainPrimitiveToNumber(node, *effect, *control);
       break;
     case IrOpcode::kPlainPrimitiveToWord32:
@@ skipping 854 matching lines @@
                                       Node* effect, Node* control) {
   NodeProperties::ReplaceEffectInput(node, effect);
   NodeProperties::ReplaceControlInput(node, control);
   DCHECK_NOT_NULL(frame_state);
   node->InsertInput(graph()->zone(), 1, frame_state);
   NodeProperties::ChangeOp(node, common()->DeoptimizeIf());
   return ValueEffectControl(node, node, node);
 }
 
 EffectControlLinearizer::ValueEffectControl
-EffectControlLinearizer::LowerCheckUnless(Node* node, Node* frame_state,
-                                          Node* effect, Node* control) {
-  NodeProperties::ReplaceEffectInput(node, effect);
-  NodeProperties::ReplaceControlInput(node, control);
-  DCHECK_NOT_NULL(frame_state);
-  node->InsertInput(graph()->zone(), 1, frame_state);
-  NodeProperties::ChangeOp(node, common()->DeoptimizeUnless());
-  return ValueEffectControl(node, node, node);
-}
-
-EffectControlLinearizer::ValueEffectControl
 EffectControlLinearizer::LowerCheckFloat64Hole(Node* node, Node* frame_state,
                                                Node* effect, Node* control) {
   // If we reach this point w/o eliminating the {node} that's marked
   // with allow-return-hole, we cannot do anything, so just deoptimize
   // in case of the hole NaN (similar to Crankshaft).
   Node* value = node->InputAt(0);
   Node* check = graph()->NewNode(
       machine()->Word32Equal(),
       graph()->NewNode(machine()->Float64ExtractHighWord32(), value),
       jsgraph()->Int32Constant(kHoleNanUpper32));
@@ skipping 229 matching lines @@
         isolate(), graph()->zone(), callable.descriptor(), 0, flags,
         Operator::kNoThrow);
     to_number_operator_.set(common()->Call(desc));
   }
   return to_number_operator_.get();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8