[compiler] Sanitize entry points to LookupSlot access.

src/full-codegen/mips/full-codegen-mips.cc

Index: src/full-codegen/mips/full-codegen-mips.cc
diff --git a/src/full-codegen/mips/full-codegen-mips.cc b/src/full-codegen/mips/full-codegen-mips.cc
index f0865ff333be0cfc299c46abeb564e04d52dc2b6..7f37f7c36a1d81c73e2aec010ab358a64e277b4a 100644
--- a/src/full-codegen/mips/full-codegen-mips.cc
+++ b/src/full-codegen/mips/full-codegen-mips.cc
@@ -1430,12 +1430,11 @@ void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy,
       // by eval-introduced variables.
       EmitDynamicLookupFastCase(proxy, typeof_mode, &slow, &done);
       __ bind(&slow);
-      __ li(a1, Operand(var->name()));
-      __ Push(cp, a1);  // Context and name.
+      __ 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(v0);
@@ -2441,10 +2440,11 @@ void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op,
              (var->mode() == CONST && op == Token::INIT)) {
     if (var->IsLookupSlot()) {
       // Assignment to var.
-      __ li(a1, Operand(var->name()));
-      __ li(a0, Operand(Smi::FromInt(language_mode())));
-      __ Push(v0, cp, a1, a0);  // Value, context, name, language mode.
-      __ CallRuntime(Runtime::kStoreLookupSlot);
+      __ Push(var->name());
+      __ Push(v0);
+      __ CallRuntime(is_strict(language_mode())
+                         ? Runtime::kStoreLookupSlot_Strict
+                         : Runtime::kStoreLookupSlot_Sloppy);
     } else {
       // Assignment to var or initializing assignment to let/const in harmony
       // mode.
@@ -2794,10 +2794,8 @@ void FullCodeGenerator::PushCalleeAndWithBaseObject(Call* expr) {
     __ bind(&slow);
     // Call the runtime to find the function to call (returned in v0)
     // and the object holding it (returned in v1).
-    DCHECK(!context_register().is(a2));
-    __ li(a2, Operand(callee->name()));
-    __ Push(context_register(), a2);
-    __ CallRuntime(Runtime::kLoadLookupSlot);
+    __ Push(callee->name());
+    __ CallRuntime(Runtime::kLoadLookupSlotForCall);
     __ Push(v0, v1);  // Function, receiver.
     PrepareForBailoutForId(expr->LookupId(), NO_REGISTERS);
 
@@ -3929,9 +3927,7 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
         } else {
           // Non-global variable.  Call the runtime to try to delete from the
           // context where the variable was introduced.
-          DCHECK(!context_register().is(a2));
-          __ li(a2, Operand(var->name()));
-          __ Push(context_register(), a2);
+          __ Push(var->name());
           __ CallRuntime(Runtime::kDeleteLookupSlot);
           context()->Plug(v0);
         }