[AA] Export isEscapeSource() API (NFC)

Export API that was previously private to BasicAliasAnalysis and
will be used in D127202.

1 files changed, 0 insertions, 24 deletions

diff --git a/llvm/lib/Analysis/BasicAliasAnalysis.cpp b/llvm/lib/Analysis/BasicAliasAnalysis.cpp
index 5356d62..c78f822 100644
--- a/llvm/lib/Analysis/BasicAliasAnalysis.cpp
+++ b/llvm/lib/Analysis/BasicAliasAnalysis.cpp
@@ -103,30 +103,6 @@ bool BasicAAResult::invalidate(Function &Fn, const PreservedAnalyses &PA,
 // Useful predicates
 //===----------------------------------------------------------------------===//
 
-/// Returns true if the pointer is one which would have been considered an
-/// escape by isNonEscapingLocalObject.
-static bool isEscapeSource(const Value *V) {
-  if (auto *CB = dyn_cast<CallBase>(V))
-    return !isIntrinsicReturningPointerAliasingArgumentWithoutCapturing(CB,
-                                                                        true);
-
-  // The load case works because isNonEscapingLocalObject considers all
-  // stores to be escapes (it passes true for the StoreCaptures argument
-  // to PointerMayBeCaptured).
-  if (isa<LoadInst>(V))
-    return true;
-
-  // The inttoptr case works because isNonEscapingLocalObject considers all
-  // means of converting or equating a pointer to an int (ptrtoint, ptr store
-  // which could be followed by an integer load, ptr<->int compare) as
-  // escaping, and objects located at well-known addresses via platform-specific
-  // means cannot be considered non-escaping local objects.
-  if (isa<IntToPtrInst>(V))
-    return true;
-
-  return false;
-}
-
 /// Returns the size of the object specified by V or UnknownSize if unknown.
 static uint64_t getObjectSize(const Value *V, const DataLayout &DL,
                               const TargetLibraryInfo &TLI,