Perform the illegal redeclaration check earlier in graph building.

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 4b539897b87b94cc66abbd27c2f2931ff9fb3354..a012d815ca585a86abd539a28fb7beb6241f1cf0 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -354,6 +354,10 @@ OptimizedCompileJob::Status OptimizedCompileJob::CreateGraph() {
     return AbortAndDisableOptimization(kTooManyParametersLocals);
   }
 
+  if (scope->HasIllegalRedeclaration()) {
+    return AbortAndDisableOptimization(kFunctionWithIllegalRedeclaration);
+  }
+
   // Take --hydrogen-filter into account.
   if (!info()->closure()->PassesFilter(FLAG_hydrogen_filter)) {
     return AbortOptimization(kHydrogenFilter);