Revert r128140 for now.

llvm-svn: 128149

1 files changed, 0 insertions, 33 deletions

diff --git a/llvm/lib/Analysis/BasicAliasAnalysis.cpp b/llvm/lib/Analysis/BasicAliasAnalysis.cpp
index e807933aaaf..f7bcd9ec44d 100644
--- a/llvm/lib/Analysis/BasicAliasAnalysis.cpp
+++ b/llvm/lib/Analysis/BasicAliasAnalysis.cpp
@@ -57,29 +57,6 @@ static bool isKnownNonNull(const Value *V) {
   return false;
 }
 
-/// areAllUsesInOneFunction - Return true if all the uses of the given value
-/// are in the same function. Note that this returns false if any of the uses
-/// are from non-instruction values.
-static bool areAllUsesInOneFunction(const Value *V) {
-  const llvm::Function *Fn = 0;
-
-  for (Value::const_use_iterator UI = V->use_begin(), E = V->use_end(); 
-       UI != E; ++UI) {
-    if (const Instruction *I = dyn_cast<Instruction>(*UI)) {
-      if (!Fn) {
-        Fn = I->getParent()->getParent();
-        continue;
-      } 
-      
-      if (Fn != I->getParent()->getParent())
-        return false;
-    } else
-      return false;
-  }
-
-  return true;
-}
-
 /// isNonEscapingLocalObject - Return true if the pointer is to a function-local
 /// object that never escapes from the function.
 static bool isNonEscapingLocalObject(const Value *V) {
@@ -102,16 +79,6 @@ static bool isNonEscapingLocalObject(const Value *V) {
         return true;
       return !PointerMayBeCaptured(V, false, /*StoreCaptures=*/true);
     }
-
-  // If this is an internal global variable that's only used in this function,
-  // check if it escapes the function.
-  if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
-    if (GV->hasInternalLinkage() && areAllUsesInOneFunction(GV)) {
-      return !PointerMayBeCaptured(V, /*ReturnCaptures=*/true, 
-                                   /*StoreCaptures=*/true);
-    }
-  }
-
   return false;
 }