Revert 165732 for further review.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165747 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ValueTracking.cpp b/lib/Analysis/ValueTracking.cpp
index 1d7f069..951b442 100644
--- a/lib/Analysis/ValueTracking.cpp
+++ b/lib/Analysis/ValueTracking.cpp
@@ -40,8 +40,7 @@
   if (unsigned BitWidth = Ty->getScalarSizeInBits())
     return BitWidth;
   assert(isa<PointerType>(Ty) && "Expected a pointer type!");
-  return TD ?
-    TD->getPointerSizeInBits(cast<PointerType>(Ty)->getAddressSpace()) : 0;
+  return TD ? TD->getPointerSizeInBits() : 0;
 }
 
 static void ComputeMaskedBitsAddSub(bool Add, Value *Op0, Value *Op1, bool NSW,
@@ -1622,8 +1621,7 @@
   
   // Re-sign extend from the pointer size if needed to get overflow edge cases
   // right.
-  unsigned AS = GEP->getPointerAddressSpace();
-  unsigned PtrSize = TD.getPointerSizeInBits(AS);
+  unsigned PtrSize = TD.getPointerSizeInBits();
   if (PtrSize < 64)
     Offset = SignExtend64(Offset, PtrSize);