rjmccall added inline comments.

================
Comment at: lib/CodeGen/CGExpr.cpp:3517
+        CGM.getCodeGenOpts().StrictVTablePointers &&
+        CGM.getCodeGenOpts().OptimizationLevel > 0)
+      addr = Address(Builder.CreateInvariantGroupBarrier(addr.getPointer()),
----------------
Checking for v-table pointers recursively isn't really that difficult, but if 
you really don't want to do that, please at least check for non-POD-ness or 
something so that this isn't kicking in for literally every struct type.


https://reviews.llvm.org/D31830



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