[LLVMdev] difference between replaceAllUsesWith and replaceUsesOfWith?

[Rob Jansen]

Ahh ha! I believe that `User::replaceUsesOfWith` modifies the use list,
which probably invalidated the use_iterator and caused my code to miss some
of the uses. The following works great! (I'll spare you the details about
what I am actually trying to do here, unless you really want to know more.)

Thanks,
Rob

===========================
while(GV->getNumUses() > 0) {
  User* u = GV->use_back();
  u->replaceUsesOfWith(GV, GEP);
}
assert(GV->use_empty());
===========================
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