[optimizing] Use callee-save registers for x86

Add ESI, EDI, EBP to available registers for non-baseline mode. Ensure
that they aren't used when byte addressible registers are needed.

Change-Id: Ie7130d4084c2ae9cfcd1e47c26eb3e5dcac1ebd6
Signed-off-by: Mark Mendell <mark.p.mendell@intel.com>
diff --git a/test/456-baseline-array-set/src/Main.java b/test/456-baseline-array-set/src/Main.java
new file mode 100644
index 0000000..5475b41
--- /dev/null
+++ b/test/456-baseline-array-set/src/Main.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+public class Main {
+  public static void main(String[] args) {
+    doArrayAccess(new Integer(1), 0);
+  }
+
+  public static void doArrayAccess(Integer value, int index) {
+    try {
+      Integer[] array = new Integer[2];
+      // If we were to do optimization on the baseline register
+      // allocator, generating code for the array set would fail on x86.
+      array[index] = array[index + 1];
+      array[index] = value;
+    } catch (ArrayStoreException e) {
+      throw e;
+    }
+  }
+}