ARM: Implement GetCachedArrayIndex in the lithium code generator.

src/arm/lithium-arm.h

Index: src/arm/lithium-arm.h
diff --git a/src/arm/lithium-arm.h b/src/arm/lithium-arm.h
index 8d2573d96c76a0bcfbdf82e23e3316cd6856b1e0..57338f16d5557cca4f7d8fe08fd6d29bca805b1e 100644
--- a/src/arm/lithium-arm.h
+++ b/src/arm/lithium-arm.h
@@ -94,6 +94,7 @@ class LCodeGen;
   V(FixedArrayLength)                           \
   V(FunctionLiteral)                            \
   V(Gap)                                        \
+  V(GetCachedArrayIndex)                        \
   V(GlobalObject)                               \
   V(GlobalReceiver)                             \
   V(Goto)                                       \
@@ -739,6 +740,17 @@ class LHasCachedArrayIndex: public LTemplateInstruction<1, 1, 0> {
 };
 
 
+class LGetCachedArrayIndex: public LTemplateInstruction<1, 1, 0> {
+ public:
+  explicit LGetCachedArrayIndex(LOperand* value) {
+    inputs_[0] = value;
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(GetCachedArrayIndex, "get-cached-array-index")
+  DECLARE_HYDROGEN_ACCESSOR(GetCachedArrayIndex)
+};
+
+
 class LHasCachedArrayIndexAndBranch: public LControlInstruction<1, 0> {
  public:
   explicit LHasCachedArrayIndexAndBranch(LOperand* value) {