X87: Crankshaft is now able to compile top level code even if there is a ScriptContext.

src/x87/lithium-x87.cc

Index: src/x87/lithium-x87.cc
diff --git a/src/x87/lithium-x87.cc b/src/x87/lithium-x87.cc
index 1e60a44be2af9c7d4d82e7e665d38aa12cf89602..472d9c58805d6a2fea2b4bfcb8272a66920ebf5a 100644
--- a/src/x87/lithium-x87.cc
+++ b/src/x87/lithium-x87.cc
@@ -973,7 +973,7 @@ void LChunkBuilder::AddInstruction(LInstruction* instr,
   }
   chunk_->AddInstruction(instr, current_block_);
 
-  if (instr->IsCall()) {
+  if (instr->IsCall() || instr->IsPrologue()) {
     HValue* hydrogen_value_for_lazy_bailout = hydrogen_val;
     if (hydrogen_val->HasObservableSideEffects()) {
       HSimulate* sim = HSimulate::cast(hydrogen_val->next());
@@ -987,6 +987,11 @@ void LChunkBuilder::AddInstruction(LInstruction* instr,
 }
 
 
+LInstruction* LChunkBuilder::DoPrologue(HPrologue* instr) {
+  return new (zone()) LPrologue();
+}
+
+
 LInstruction* LChunkBuilder::DoGoto(HGoto* instr) {
   return new(zone()) LGoto(instr->FirstSuccessor());
 }