[turbofan] Introduce PlainPrimitiveToNumber.

src/compiler/simplified-lowering.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/simplified-lowering.h"
 
 #include <limits>
 
 #include "src/address-map.h"
 #include "src/base/bits.h"
@@ skipping 1621 matching lines @@
               access.base_is_tagged, access.machine_type.representation(),
               access.type, node->InputAt(2));
           if (write_barrier_kind < access.write_barrier_kind) {
             access.write_barrier_kind = write_barrier_kind;
             NodeProperties::ChangeOp(
                 node, jsgraph_->simplified()->StoreElement(access));
           }
         }
         return;
       }
+      case IrOpcode::kPlainPrimitiveToNumber:
+        ProcessInput(node, 0, UseInfo::AnyTagged());
+        if (truncation.TruncatesToWord32()) {
+          SetOutput(node, MachineRepresentation::kWord32);
+          if (lower()) {
+            NodeProperties::ChangeOp(node,
+                                     simplified()->PlainPrimitiveToWord32());
+          }
+        } else if (truncation.TruncatesToFloat64()) {
+          SetOutput(node, MachineRepresentation::kFloat64);
+          if (lower()) {
+            NodeProperties::ChangeOp(node,
+                                     simplified()->PlainPrimitiveToFloat64());
+          }
+        } else {
+          SetOutput(node, MachineRepresentation::kTagged);
+        }
+        return;
       case IrOpcode::kObjectIsCallable:
       case IrOpcode::kObjectIsNumber:
       case IrOpcode::kObjectIsReceiver:
       case IrOpcode::kObjectIsSmi:
       case IrOpcode::kObjectIsString:
       case IrOpcode::kObjectIsUndetectable: {
         ProcessInput(node, 0, UseInfo::AnyTagged());
         SetOutput(node, MachineRepresentation::kBit);
         return;
       }
@@ skipping 149 matching lines @@
       // inference runs, so we do not have any real test coverage.
       // Simply fail here.
       case IrOpcode::kChangeFloat64ToInt32:
       case IrOpcode::kChangeFloat64ToUint32:
       case IrOpcode::kTruncateInt64ToInt32:
       case IrOpcode::kChangeFloat32ToFloat64:
       case IrOpcode::kCheckedUint32ToInt32:
       case IrOpcode::kCheckedFloat64ToInt32:
       case IrOpcode::kCheckedTaggedToInt32:
       case IrOpcode::kCheckedTaggedToFloat64:
+      case IrOpcode::kPlainPrimitiveToWord32:
+      case IrOpcode::kPlainPrimitiveToFloat64:
         FATAL("Representation inference: unsupported opcodes.");
         break;
 
       default:
         VisitInputs(node);
         // Assume the output is tagged.
         return SetOutput(node, MachineRepresentation::kTagged);
     }
     UNREACHABLE();
   }
@@ skipping 998 matching lines @@
         isolate(), graph()->zone(), callable.descriptor(), 0, flags,
         Operator::kNoProperties);
     to_number_operator_.set(common()->Call(desc));
   }
   return to_number_operator_.get();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8