ARM: Implement StringLength and StringCharCodeAt in the lithium-arm

src/arm/macro-assembler-arm.cc

Index: src/arm/macro-assembler-arm.cc
diff --git a/src/arm/macro-assembler-arm.cc b/src/arm/macro-assembler-arm.cc
index ae30d5df392240a626f1562b8617402160aeaa76..a78de986e7cd63269b020aeff3c47e7f0de241dc 100644
--- a/src/arm/macro-assembler-arm.cc
+++ b/src/arm/macro-assembler-arm.cc
@@ -1970,6 +1970,13 @@ void MacroAssembler::AbortIfSmi(Register object) {
 }
 
 
+void MacroAssembler::AbortIfNotSmi(Register object) {
+  ASSERT_EQ(0, kSmiTag);
+  tst(object, Operand(kSmiTagMask));
+  Assert(eq, "Operand is not smi");
+}
+
+
 void MacroAssembler::JumpIfNonSmisNotBothSequentialAsciiStrings(
     Register first,
     Register second,