Convert diamond shaped control flow into a single conditional instruction.

runtime/vm/assembler_x64.cc

 // 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.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/heap.h"
 #include "vm/memory_region.h"
@@ skipping 137 matching lines @@
 
 
 void Assembler::popq(const Address& address) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitOperandREX(0, address, REX_NONE);
   EmitUint8(0x8F);
   EmitOperand(0, address);
 }
 
 
+void Assembler::setcc(Condition condition, ByteRegister dst) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x90 + condition);
+  EmitUint8(0xC0 + dst);
+}
+
+
 void Assembler::movl(Register dst, Register src) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   Operand operand(src);
   EmitOperandREX(dst, operand, REX_NONE);
   EmitUint8(0x8B);
   EmitOperand(dst & 7, operand);
 }
 
 
 void Assembler::movl(Register dst, const Immediate& imm) {
@@ skipping 2337 matching lines @@
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfXmmRegisters));
   return xmm_reg_names[reg];
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64