[turbofan] Remove obsolete frame-state from count op.

src/compiler/ast-graph-builder.cc

 // Copyright 2014 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/ast-graph-builder.h"
 
 #include "src/ast/scopes.h"
 #include "src/compiler.h"
 #include "src/compiler/ast-loop-assignment-analyzer.h"
 #include "src/compiler/control-builders.h"
@@ skipping 2677 matching lines @@
     }
   }
 
   // Convert old value into a number.
   old_value = NewNode(javascript()->ToNumber(), old_value);
   PrepareFrameState(old_value, expr->ToNumberId(),
                     OutputFrameStateCombine::Push());
 
   // Create a proper eager frame state for the stores.
   environment()->Push(old_value);
-  FrameStateBeforeAndAfter binop_states(this, expr->ToNumberId());
+  PrepareEagerCheckpoint(expr->ToNumberId());
   old_value = environment()->Pop();
 
   // Save result for postfix expressions at correct stack depth.
   if (is_postfix) {
     if (assign_type != VARIABLE) {
       environment()->Poke(stack_depth, old_value);
     } else {
       environment()->Push(old_value);
     }
   }
 
   // Create node to perform +1/-1 operation.
-  // TODO(bmeurer): Cleanup this feedback/bailout mess!
   Node* value = BuildBinaryOp(old_value, jsgraph()->OneConstant(),
                               expr->binary_op(), expr->CountBinOpFeedbackId());
-  // This should never deoptimize because we have converted to number before.
-  binop_states.AddToNode(value, BailoutId::None(),
-                         OutputFrameStateCombine::Ignore());
+  // This should never lazy deopt because we have converted to number before.
+  PrepareFrameState(value, BailoutId::None());
 
   // Store the value.
   VectorSlotPair feedback = CreateVectorSlotPair(expr->CountSlot());
   switch (assign_type) {
     case VARIABLE: {
       Variable* variable = expr->expression()->AsVariableProxy()->var();
       environment()->Push(value);
       BuildVariableAssignment(variable, value, expr->op(), feedback,
                               expr->AssignmentId());
       environment()->Pop();
@@ skipping 1644 matching lines @@
     // Phi does not exist yet, introduce one.
     value = NewPhi(inputs, value, control);
     value->ReplaceInput(inputs - 1, other);
   }
   return value;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8