[turbofan] Add backend support for Float32Constant.

src/compiler/raw-machine-assembler.h

 // 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.
 
 #ifndef V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 #define V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_
 
 #include "src/v8.h"
 
 #include "src/compiler/common-operator.h"
@@ skipping 62 matching lines @@
   }
   Node* Int32Constant(int32_t value) {
     return NewNode(common()->Int32Constant(value));
   }
   Node* Int64Constant(int64_t value) {
     return NewNode(common()->Int64Constant(value));
   }
   Node* NumberConstant(double value) {
     return NewNode(common()->NumberConstant(value));
   }
+  Node* Float32Constant(float value) {
+    return NewNode(common()->Float32Constant(value));
+  }
   Node* Float64Constant(double value) {
     return NewNode(common()->Float64Constant(value));
   }
   Node* HeapConstant(Handle<Object> object) {
     Unique<Object> val = Unique<Object>::CreateUninitialized(object);
     return NewNode(common()->HeapConstant(val));
   }
 
   Node* Projection(int index, Node* a) {
     return NewNode(common()->Projection(index), a);
@@ skipping 342 matching lines @@
   BasicBlock* current_block_;
 
   DISALLOW_COPY_AND_ASSIGN(RawMachineAssembler);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_RAW_MACHINE_ASSEMBLER_H_