Implement inline string compare on ARM.

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index 55c73006d262bee1e1ac83c97d7b98574c404b58..3f000ee411c704b1eb83229f580fc1345e1f9209 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -415,6 +415,17 @@ class MacroAssembler: public Assembler {
   void set_allow_stub_calls(bool value) { allow_stub_calls_ = value; }
   bool allow_stub_calls() { return allow_stub_calls_; }
 
+  // ---------------------------------------------------------------------------
+  // String utilities.
+
+  // Checks if both objects are sequential ASCII strings, and jumps to label
+  // if either is not.
+  void JumpIfNotBothSequentialAsciiStrings(Register object1,
+                                           Register object2,
+                                           Register scratch1,
+                                           Register scratch2,
+                                           Label *on_not_flat_ascii_strings);
+
  private:
   List<Unresolved> unresolved_;
   bool generating_stub_;