Move assertion with TargetPassConfig's Initialized flag.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159569 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/Passes.cpp b/lib/CodeGen/Passes.cpp
index c64843e..20a3ff4 100644
--- a/lib/CodeGen/Passes.cpp
+++ b/lib/CodeGen/Passes.cpp
@@ -273,14 +273,14 @@
 
 /// Add a pass to the PassManager.
 void TargetPassConfig::addPass(Pass *P) {
+  assert(!Initialized && "PassConfig is immutable");
+
   PM->add(P);
 }
 
 /// Add a CodeGen pass at this point in the pipeline after checking for target
 /// and command line overrides.
 AnalysisID TargetPassConfig::addPass(AnalysisID PassID) {
-  assert(!Initialized && "PassConfig is immutable");
-
   AnalysisID TargetID = getPassSubstitution(PassID);
   AnalysisID FinalID = overridePass(PassID, TargetID);
   if (FinalID == 0)