ARM: Implement StringLength and StringCharCodeAt in the lithium-arm

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index d3673912fc65a7cb48c2e3162af25f5d311855b1..f63214b8a78659c1ff0be51e01bafe2b3edb884e 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -1725,14 +1725,16 @@ LInstruction* LChunkBuilder::DoStoreNamedGeneric(HStoreNamedGeneric* instr) {
 
 
 LInstruction* LChunkBuilder::DoStringCharCodeAt(HStringCharCodeAt* instr) {
-  Abort("LStringCharCodeAt instruction not implemented on ARM");
-  return NULL;
+  LOperand* string = UseRegister(instr->string());
+  LOperand* index = UseRegisterOrConstant(instr->index());
+  LInstruction* result = new LStringCharCodeAt(string, index);
+  return AssignEnvironment(AssignPointerMap(DefineAsRegister(result)));
 }
 
 
 LInstruction* LChunkBuilder::DoStringLength(HStringLength* instr) {
-  Abort("LStringLength instruction not implemented on ARM");
-  return NULL;
+  LOperand* string = UseRegisterAtStart(instr->value());
+  return DefineAsRegister(new LStringLength(string));
 }