[turbofan] Add backend support for float32.

src/ia32/assembler-ia32.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 130 matching lines @@
 }
 
 
 struct XMMRegister {
   static const int kMaxNumAllocatableRegisters = 7;
   static const int kMaxNumRegisters = 8;
   static int NumAllocatableRegisters() {
     return kMaxNumAllocatableRegisters;
   }
 
+  // TODO(turbofan): Proper support for float32.
+  static int NumAllocatableAliasedRegisters() {
+    return NumAllocatableRegisters();
+  }
+
   static int ToAllocationIndex(XMMRegister reg) {
     DCHECK(reg.code() != 0);
     return reg.code() - 1;
   }
 
   static XMMRegister FromAllocationIndex(int index) {
     DCHECK(index >= 0 && index < kMaxNumAllocatableRegisters);
     return from_code(index + 1);
   }
 
@@ skipping 1025 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_ASSEMBLER_IA32_H_