Emit vector mulitply and accumulate instructions for x86.

This patch adds a new cpu vaiant named kabylake and performs
instruction simplification to generate VectorMulitplyAccumulate.

Test: ./test.py --host --64

Change-Id: Ie6cc882dadf1322dd4d3ae49bfdb600b0c447765
Signed-off-by: Gupta Kumar, Sanjiv <sanjiv.kumar.gupta@intel.com>
diff --git a/compiler/optimizing/instruction_simplifier_x86.h b/compiler/optimizing/instruction_simplifier_x86.h
new file mode 100644
index 0000000..1fb199f
--- /dev/null
+++ b/compiler/optimizing/instruction_simplifier_x86.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_COMPILER_OPTIMIZING_INSTRUCTION_SIMPLIFIER_X86_H_
+#define ART_COMPILER_OPTIMIZING_INSTRUCTION_SIMPLIFIER_X86_H_
+
+#include "nodes.h"
+#include "optimization.h"
+#include "code_generator_x86.h"
+
+namespace art {
+namespace x86 {
+
+class InstructionSimplifierX86 : public HOptimization {
+ public:
+  InstructionSimplifierX86(HGraph* graph, CodeGenerator* codegen, OptimizingCompilerStats* stats)
+      : HOptimization(graph, kInstructionSimplifierX86PassName, stats),
+        codegen_(down_cast<CodeGeneratorX86*>(codegen)) {}
+
+  static constexpr const char* kInstructionSimplifierX86PassName = "instruction_simplifier_x86";
+
+  bool Run() OVERRIDE;
+
+ private:
+  CodeGeneratorX86* codegen_;
+};
+
+}  // namespace x86
+}  // namespace art
+
+#endif  // ART_COMPILER_OPTIMIZING_INSTRUCTION_SIMPLIFIER_X86_H_