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e749325463
CallSite roughly behaves as a common base CallInst and InvokeInst. Bring the behavior closer to that model by making upcasts explicit. Downcasts remain implicit and work as before. Following dyn_cast as a mental model checking whether a Value *V isa CallSite now looks like this: if (auto CS = CallSite(V)) // think dyn_cast instead of: if (CallSite CS = V) This is an extra token but I think it is slightly clearer. Making the ctor explicit has the advantage of not accidentally creating nullptr CallSites, e.g. when you pass a Value * to a function taking a CallSite argument. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234601 91177308-0d34-0410-b5e6-96231b3b80d8
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