[turbofan] Add backend support for float32.

src/compiler/instruction-selector.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/instruction-selector.h"
 
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
 #include "src/compiler/pipeline.h"
@@ skipping 552 matching lines @@
     case IrOpcode::kInt64UDiv:
       return VisitInt64UDiv(node);
     case IrOpcode::kInt64Mod:
       return VisitInt64Mod(node);
     case IrOpcode::kInt64UMod:
       return VisitInt64UMod(node);
     case IrOpcode::kInt64LessThan:
       return VisitInt64LessThan(node);
     case IrOpcode::kInt64LessThanOrEqual:
       return VisitInt64LessThanOrEqual(node);
+    case IrOpcode::kChangeFloat32ToFloat64:
+      return MarkAsDouble(node), VisitChangeFloat32ToFloat64(node);
     case IrOpcode::kChangeInt32ToFloat64:
       return MarkAsDouble(node), VisitChangeInt32ToFloat64(node);
     case IrOpcode::kChangeUint32ToFloat64:
       return MarkAsDouble(node), VisitChangeUint32ToFloat64(node);
     case IrOpcode::kChangeFloat64ToInt32:
       return VisitChangeFloat64ToInt32(node);
     case IrOpcode::kChangeFloat64ToUint32:
       return VisitChangeFloat64ToUint32(node);
     case IrOpcode::kChangeInt32ToInt64:
       return VisitChangeInt32ToInt64(node);
     case IrOpcode::kChangeUint32ToUint64:
       return VisitChangeUint32ToUint64(node);
+    case IrOpcode::kTruncateFloat64ToFloat32:
+      return MarkAsDouble(node), VisitTruncateFloat64ToFloat32(node);
     case IrOpcode::kTruncateFloat64ToInt32:
       return VisitTruncateFloat64ToInt32(node);
     case IrOpcode::kTruncateInt64ToInt32:
       return VisitTruncateInt64ToInt32(node);
     case IrOpcode::kFloat64Add:
       return MarkAsDouble(node), VisitFloat64Add(node);
     case IrOpcode::kFloat64Sub:
       return MarkAsDouble(node), VisitFloat64Sub(node);
     case IrOpcode::kFloat64Mul:
       return MarkAsDouble(node), VisitFloat64Mul(node);
@@ skipping 497 matching lines @@
 
 
 void InstructionSelector::VisitCall(Node* call, BasicBlock* continuation,
                                     BasicBlock* deoptimization) {}
 
 #endif  // !V8_TURBOFAN_BACKEND
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8