Eliminate extended mode, and other modes clean-up

src/a64/lithium-codegen-a64.cc

Index: src/a64/lithium-codegen-a64.cc
diff --git a/src/a64/lithium-codegen-a64.cc b/src/a64/lithium-codegen-a64.cc
index e1264dcc5cde90252892b2479c18278b0adab43a..bc0b106cdb7f7a6e10a26fa134ba32713d4f9766 100644
--- a/src/a64/lithium-codegen-a64.cc
+++ b/src/a64/lithium-codegen-a64.cc
@@ -675,7 +675,7 @@ bool LCodeGen::GeneratePrologue() {
     // global proxy when called as functions (without an explicit receiver
     // object).
     if (info_->this_has_uses() &&
-        info_->is_sloppy_mode() &&
+        info_->strict_mode() == SLOPPY &&
         !info_->is_native()) {
       Label ok;
       int receiver_offset = info_->scope()->num_parameters() * kXRegSizeInBytes;
@@ -2736,7 +2736,7 @@ void LCodeGen::DoFunctionLiteral(LFunctionLiteral* instr) {
   // space for nested functions that don't need literals cloning.
   bool pretenure = instr->hydrogen()->pretenure();
   if (!pretenure && instr->hydrogen()->has_no_literals()) {
-    FastNewClosureStub stub(instr->hydrogen()->language_mode(),
+    FastNewClosureStub stub(instr->hydrogen()->strict_mode(),
                             instr->hydrogen()->is_generator());
     __ Mov(x2, Operand(instr->hydrogen()->shared_info()));
     CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr);
@@ -5031,7 +5031,7 @@ void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
   ASSERT(ToRegister(instr->key()).Is(x1));
   ASSERT(ToRegister(instr->value()).Is(x0));
 
-  Handle<Code> ic = (instr->strict_mode_flag() == kStrictMode)
+  Handle<Code> ic = instr->strict_mode() == STRICT
       ? isolate()->builtins()->KeyedStoreIC_Initialize_Strict()
       : isolate()->builtins()->KeyedStoreIC_Initialize();
   CallCode(ic, RelocInfo::CODE_TARGET, instr);
@@ -5138,8 +5138,7 @@ void LCodeGen::DoStoreNamedGeneric(LStoreNamedGeneric* instr) {
 
   // Name must be in x2.
   __ Mov(x2, Operand(instr->name()));
-  Handle<Code> ic = StoreIC::initialize_stub(isolate(),
-                                             instr->strict_mode_flag());
+  Handle<Code> ic = StoreIC::initialize_stub(isolate(), instr->strict_mode());
   CallCode(ic, RelocInfo::CODE_TARGET, instr);
 }