clean up handling of 'free', detangling it from everything else.

It can be seriously improved, but at least now it isn't intertwined
with the other logic.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120377 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/MemoryBuiltins.h

@@ -74,6 +74,10 @@ Value *getMallocArraySize(CallInst *CI, const TargetData *TD,
 
 /// isFreeCall - Returns non-null if the value is a call to the builtin free()
 const CallInst *isFreeCall(const Value *I);
+  
+static inline CallInst *isFreeCall(Value *I) {
+  return const_cast<CallInst*>(isFreeCall((const Value*)I));
+}
 
 } // End llvm namespace