Improve isSafeToLoadUnconditionally to recognize that GEPs with constant

indices are safe if the result is known to be within the bounds of the
underlying object.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94829 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/GVN.cpp

@@ -1650,7 +1650,8 @@ bool GVN::processNonLocalLoad(LoadInst *LI,
   // put anywhere; this can be improved, but should be conservatively safe.
   if (!allSingleSucc &&
       // FIXME: REEVALUTE THIS.
-      !isSafeToLoadUnconditionally(LoadPtr, UnavailablePred->getTerminator())) {
+      !isSafeToLoadUnconditionally(LoadPtr,
+                                   UnavailablePred->getTerminator(), TD)) {
     assert(NewInsts.empty() && "Should not have inserted instructions");
     return false;
   }