Revert of [stubs] Introduce LeftShift, SignedRightShift and UnsignedRightShift stubs.

src/compiler/code-stub-assembler.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/code-stub-assembler.h"
 
 #include <ostream>
 
 #include "src/code-factory.h"
 #include "src/compiler/graph.h"
@@ skipping 864 matching lines @@
   Goto(&if_join);
   Bind(&if_notoverflow);
   {
     Node* result = Projection(0, pair);
     var_result.Bind(result);
   }
   Goto(&if_join);
   Bind(&if_join);
   return var_result.value();
 }
-
-Node* CodeStubAssembler::ChangeUint32ToTagged(Node* value) {
-  Label if_overflow(this, Label::kDeferred), if_not_overflow(this),
-      if_join(this);
-  Variable var_result(this, MachineRepresentation::kTagged);
-  // If {value} > 2^31 - 1, we need to store it in a HeapNumber.
-  Branch(Int32LessThan(value, Int32Constant(0)), &if_overflow,
-         &if_not_overflow);
-  Bind(&if_not_overflow);
-  {
-    if (raw_assembler_->machine()->Is64()) {
-      var_result.Bind(SmiTag(ChangeUint32ToUint64(value)));
-    } else {
-      // If tagging {value} results in an overflow, we need to use a HeapNumber
-      // to represent it.
-      Node* pair = Int32AddWithOverflow(value, value);
-      Node* overflow = Projection(1, pair);
-      GotoIf(overflow, &if_overflow);
-
-      Node* result = Projection(0, pair);
-      var_result.Bind(result);
-    }
-  }
-  Goto(&if_join);
-
-  Bind(&if_overflow);
-  {
-    Node* float64_value = ChangeUint32ToFloat64(value);
-    var_result.Bind(AllocateHeapNumberWithValue(float64_value));
-  }
-  Goto(&if_join);
-
-  Bind(&if_join);
-  return var_result.value();
-}
 
 Node* CodeStubAssembler::TruncateTaggedToFloat64(Node* context, Node* value) {
   // We might need to loop once due to ToNumber conversion.
   Variable var_value(this, MachineRepresentation::kTagged),
       var_result(this, MachineRepresentation::kFloat64);
   Label loop(this, &var_value), done_loop(this, &var_result);
   var_value.Bind(value);
   Goto(&loop);
   Bind(&loop);
   {
@@ skipping 824 matching lines @@
       }
     }
   }
 
   bound_ = true;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8