[compiler] Sanitize entry points to LookupSlot access.

src/full-codegen/x64/full-codegen-x64.cc

Index: src/full-codegen/x64/full-codegen-x64.cc
diff --git a/src/full-codegen/x64/full-codegen-x64.cc b/src/full-codegen/x64/full-codegen-x64.cc
index 690055351b8edbf71d979bebc96396eba020cfd8..a63832c9cbde82c227b65405f49ad0660dbfc046 100644
--- a/src/full-codegen/x64/full-codegen-x64.cc
+++ b/src/full-codegen/x64/full-codegen-x64.cc
@@ -1380,12 +1380,11 @@ void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy,
       // by eval-introduced variables.
       EmitDynamicLookupFastCase(proxy, typeof_mode, &slow, &done);
       __ bind(&slow);
-      __ Push(rsi);  // Context.
       __ Push(var->name());
       Runtime::FunctionId function_id =
           typeof_mode == NOT_INSIDE_TYPEOF
               ? Runtime::kLoadLookupSlot
-              : Runtime::kLoadLookupSlotNoReferenceError;
+              : Runtime::kLoadLookupSlotInsideTypeof;
       __ CallRuntime(function_id);
       __ bind(&done);
       context()->Plug(rax);
@@ -2335,11 +2334,11 @@ void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op,
              (var->mode() == CONST && op == Token::INIT)) {
     if (var->IsLookupSlot()) {
       // Assignment to var.
-      __ Push(rax);  // Value.
-      __ Push(rsi);  // Context.
       __ Push(var->name());
-      __ Push(Smi::FromInt(language_mode()));
-      __ CallRuntime(Runtime::kStoreLookupSlot);
+      __ Push(rax);
+      __ CallRuntime(is_strict(language_mode())
+                         ? Runtime::kStoreLookupSlot_Strict
+                         : Runtime::kStoreLookupSlot_Sloppy);
     } else {
       // Assignment to var or initializing assignment to let/const in harmony
       // mode.
@@ -2678,9 +2677,8 @@ void FullCodeGenerator::PushCalleeAndWithBaseObject(Call* expr) {
     __ bind(&slow);
     // Call the runtime to find the function to call (returned in rax) and
     // the object holding it (returned in rdx).
-    __ Push(context_register());
     __ Push(callee->name());
-    __ CallRuntime(Runtime::kLoadLookupSlot);
+    __ CallRuntime(Runtime::kLoadLookupSlotForCall);
     __ Push(rax);  // Function.
     __ Push(rdx);  // Receiver.
     PrepareForBailoutForId(expr->LookupId(), NO_REGISTERS);