A64: Synchronize with r18581.

src/a64/ic-a64.cc

Index: src/a64/ic-a64.cc
diff --git a/src/a64/ic-a64.cc b/src/a64/ic-a64.cc
index 6d72d02ae7b4cd726fdc55407a8e3de8c4e2c18b..8684bf2d63ad74f3a2c44061634529becbdd0d49 100644
--- a/src/a64/ic-a64.cc
+++ b/src/a64/ic-a64.cc
@@ -585,7 +585,7 @@ void CallICBase::GenerateMiss(MacroAssembler* masm,
 
     // Patch the receiver on the stack.
     __ Bind(&global);
-    __ Ldr(x2, FieldMemOperand(x2, GlobalObject::kGlobalReceiverOffset));
+    __ LoadRoot(x2, Heap::kUndefinedValueRootIndex);
     __ Poke(x2, argc * kXRegSizeInBytes);
     __ Bind(&invoke);
   }
@@ -787,7 +787,7 @@ void KeyedCallIC::GenerateNormal(MacroAssembler* masm, int argc) {
 }
 
 
-void LoadIC::GenerateMegamorphic(MacroAssembler* masm) {
+void LoadIC::GenerateMegamorphic(MacroAssembler* masm, ContextualMode mode) {
   // ----------- S t a t e -------------
   //  -- x2    : name
   //  -- lr    : return address
@@ -795,8 +795,9 @@ void LoadIC::GenerateMegamorphic(MacroAssembler* masm) {
   // -----------------------------------
 
   // Probe the stub cache.
+  ExtraICState extra_ic_state = IC::ComputeExtraICState(mode);
   Code::Flags flags = Code::ComputeFlags(
-      Code::HANDLER, MONOMORPHIC, kNoExtraICState,
+      Code::HANDLER, MONOMORPHIC, extra_ic_state,
       Code::NORMAL, Code::LOAD_IC);
   masm->isolate()->stub_cache()->GenerateProbe(
       masm, flags, x0, x2, x3, x4, x5, x6);