dblaikie added inline comments.

================
Comment at: lib/CodeGen/CGDebugInfo.cpp:1317
@@ -1316,2 +1316,3 @@
       }
+      assert(V && "constant must be not NULL at this point");
       TemplateParams.push_back(DBuilder.createTemplateValueParameter(
----------------
It looks like this assertion could actually be a different assertion a little 
higher up.

For 'V' to be non-null, one of the if/else if chain above must fire.

So change the last else if to an else, and the dyn_cast to a cast, and the cast 
will fail an internal assertion if it's not valid (& the analyzer can easily 
then see that at least one of the assignments to V happens - whether or not the 
analyzer assumes that all the initializers of V are non-null, that's a separate 
issue...)

================
Comment at: lib/CodeGen/CodeGenModule.cpp:2302
@@ -2301,2 +2301,3 @@
                                                  unsigned AddrSpace) {
+  assert(D && "variable declaration must be not NULL");
   if (LangOpts.CUDA && LangOpts.CUDAIsDevice) {
----------------
Again, a bit confused about whether you're proposing fixing nearly every 
pointer parameter in Clang and LLVM to assert non-null... I think we'd need a 
discussion about what that looks like.


http://reviews.llvm.org/D19960



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