Reland arguments access support for inlined functions (r11109,r11118).

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index d147907035fbfb10b746c69a975bfd083bd3bdc0..96e7090f42b857dd4f4deb4637d470fd35e7370f 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -1071,7 +1071,8 @@ LInstruction* LChunkBuilder::DoArgumentsLength(HArgumentsLength* length) {
 
 
 LInstruction* LChunkBuilder::DoArgumentsElements(HArgumentsElements* elems) {
-  return DefineAsRegister(new(zone()) LArgumentsElements);
+  return DefineAsRegister(new(zone()) LArgumentsElements(
+      elems->from_inlined()));
 }
 
 
@@ -2270,8 +2271,8 @@ LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
                                                undefined,
                                                instr->call_kind(),
                                                instr->is_construct());
-  if (instr->arguments() != NULL) {
-    inner->Bind(instr->arguments(), graph()->GetArgumentsObject());
+  if (instr->arguments_var() != NULL) {
+    inner->Bind(instr->arguments_var(), graph()->GetArgumentsObject());
   }
   current_block_->UpdateEnvironment(inner);
   chunk_->AddInlinedClosure(instr->closure());
@@ -2280,10 +2281,21 @@ LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
 
 
 LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
+  LInstruction* pop = NULL;
+
+  HEnvironment* env = current_block_->last_environment();
+
+  if (instr->arguments_pushed()) {
+    int argument_count = env->arguments_environment()->parameter_count();
+    pop = new(zone()) LDrop(argument_count);
+    argument_count_ -= argument_count;
+  }
+
   HEnvironment* outer = current_block_->last_environment()->
       DiscardInlined(false);
   current_block_->UpdateEnvironment(outer);
-  return NULL;
+
+  return pop;
 }