Convert diamond shaped control flow into a single conditional instruction.

runtime/vm/assembler_ia32.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ASSEMBLER_IA32_H_
 #define VM_ASSEMBLER_IA32_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_ia32.h directly; use assembler.h instead.
 #endif
@@ skipping 311 matching lines @@
   void pushl(Register reg);
   void pushl(const Address& address);
   void pushl(const Immediate& imm);
 
   void popl(Register reg);
   void popl(const Address& address);
 
   void pushal();
   void popal();
 
+  void setcc(Condition condition, ByteRegister dst);
+
   void movl(Register dst, const Immediate& src);
   void movl(Register dst, Register src);
 
   void movl(Register dst, const Address& src);
   void movl(const Address& dst, Register src);
   void movl(const Address& dst, const Immediate& imm);
 
   void movzxb(Register dst, ByteRegister src);
   void movzxb(Register dst, const Address& src);
   void movsxb(Register dst, ByteRegister src);
@@ skipping 256 matching lines @@
 
   // Issues a move instruction if 'to' is not the same as 'from'.
   void MoveRegister(Register to, Register from);
   void PopRegister(Register r);
 
   void AddImmediate(Register reg, const Immediate& imm);
 
   void Drop(intptr_t stack_elements);
 
   void LoadObject(Register dst, const Object& object);
+
   void PushObject(const Object& object);
   void CompareObject(Register reg, const Object& object);
   void LoadDoubleConstant(XmmRegister dst, double value);
 
   void StoreIntoObject(Register object,  // Object we are storing into.
                        const Address& dest,  // Where we are storing into.
                        Register value,  // Value we are storing.
                        bool can_value_be_smi = true);
 
   void StoreIntoObjectNoBarrier(Register object,
@@ skipping 209 matching lines @@
 }
 
 
 inline void Assembler::EmitOperandSizeOverride() {
   EmitUint8(0x66);
 }
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_IA32_H_