Add a new interface

llvm-svn: 18266

2 files changed, 17 insertions, 0 deletions

diff --git a/llvm/include/llvm/Analysis/AliasSetTracker.h b/llvm/include/llvm/Analysis/AliasSetTracker.h
index 91c822b5031..7f974fd0634 100644
--- a/llvm/include/llvm/Analysis/AliasSetTracker.h
+++ b/llvm/include/llvm/Analysis/AliasSetTracker.h
@@ -306,6 +306,11 @@ public:
   AliasSet *getAliasSetForPointerIfExists(Value *P, unsigned Size) {
     return findAliasSetForPointer(P, Size);
   }
+  
+  /// containsPointer - Return true if the specified location is represented by
+  /// this alias set, false otherwise.  This does not modify the AST object or
+  /// alias sets.
+  bool containsPointer(Value *P, unsigned Size) const;
 
   /// getAliasAnalysis - Return the underlying alias analysis object used by
   /// this tracker.
diff --git a/llvm/lib/Analysis/AliasSetTracker.cpp b/llvm/lib/Analysis/AliasSetTracker.cpp
index 2da144c35fe..b351874e883 100644
--- a/llvm/lib/Analysis/AliasSetTracker.cpp
+++ b/llvm/lib/Analysis/AliasSetTracker.cpp
@@ -189,6 +189,18 @@ AliasSet *AliasSetTracker::findAliasSetForPointer(const Value *Ptr,
   return FoundSet;
 }
 
+/// containsPointer - Return true if the specified location is represented by
+/// this alias set, false otherwise.  This does not modify the AST object or
+/// alias sets.
+bool AliasSetTracker::containsPointer(Value *Ptr, unsigned Size) const {
+  for (const_iterator I = begin(), E = end(); I != E; ++I)
+    if (!I->Forward && I->aliasesPointer(Ptr, Size, AA))
+      return true;
+  return false;
+}
+
+
+
 AliasSet *AliasSetTracker::findAliasSetForCallSite(CallSite CS) {
   AliasSet *FoundSet = 0;
   for (iterator I = begin(), E = end(); I != E; ++I)