ARM: Implement StringLength and StringCharCodeAt in the lithium-arm

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 a14150814375ee0c9625f09bab54a18bdf9ac84a..48febdf7a265c4b25d207f6db33606a37304a3f5 100644
--- a/src/arm/lithium-arm.h
+++ b/src/arm/lithium-arm.h
@@ -67,6 +67,7 @@ class LCodeGen;
 //     LModI
 //     LMulI
 //     LShiftI
+//     LStringCharCodeAt
 //     LSubI
 //   LCallConstantFunction
 //   LCallFunction
@@ -136,6 +137,7 @@ class LCodeGen;
 //     LReturn
 //     LSmiTag
 //     LStoreGlobal
+//     LStringLength
 //     LTaggedToI
 //     LThrow
 //     LTypeof
@@ -251,6 +253,8 @@ class LCodeGen;
   V(StoreNamedField)                            \
   V(StoreNamedGeneric)                          \
   V(SubI)                                       \
+  V(StringCharCodeAt)                           \
+  V(StringLength)                               \
   V(TaggedToI)                                  \
   V(Throw)                                      \
   V(Typeof)                                     \
@@ -1580,6 +1584,28 @@ class LStoreKeyedGeneric: public LStoreKeyed {
 };
 
 
+class LStringCharCodeAt: public LBinaryOperation {
+ public:
+  LStringCharCodeAt(LOperand* string, LOperand* index)
+      : LBinaryOperation(string, index) {}
+
+  DECLARE_CONCRETE_INSTRUCTION(StringCharCodeAt, "string-char-code-at")
+  DECLARE_HYDROGEN_ACCESSOR(StringCharCodeAt)
+
+  LOperand* string() { return left(); }
+  LOperand* index() { return right(); }
+};
+
+
+class LStringLength: public LUnaryOperation {
+ public:
+  explicit LStringLength(LOperand* string) : LUnaryOperation(string) {}
+
+  DECLARE_CONCRETE_INSTRUCTION(StringLength, "string-length")
+  DECLARE_HYDROGEN_ACCESSOR(StringLength)
+};
+
+
 class LCheckFunction: public LUnaryOperation {
  public:
   explicit LCheckFunction(LOperand* use) : LUnaryOperation(use) { }