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[CallSite] Make construction from Value* (or Instruction*) explicit.

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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
This commit is contained in:
Benjamin Kramer
2015-04-10 14:50:08 +00:00
parent 3905bb619c
commit e749325463
17 changed files with 34 additions and 33 deletions
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2
lib/Analysis/MemoryDependenceAnalysis.cpp
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@ -223,7 +223,7 @@ getCallSiteDependencyFrom(CallSite CS, bool isReadOnlyCall,
continue;
}
if (CallSite InstCS = cast<Value>(Inst)) {
if (auto InstCS = CallSite(Inst)) {
// Debug intrinsics don't cause dependences.
if (isa<DbgInfoIntrinsic>(Inst)) continue;
// If these two calls do not interfere, look past it.