Update memdep when load PRE inserts a new load, and add some debug output.

I don't have a small testcase for this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96890 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/GVN.cpp b/lib/Transforms/Scalar/GVN.cpp
index f015def..164730c 100644 (file)
--- a/lib/Transforms/Scalar/GVN.cpp
+++ b/lib/Transforms/Scalar/GVN.cpp
@@ -1707,6 +1707,8 @@ bool GVN::processNonLocalLoad(LoadInst *LI,
     // Add the newly created load.
     ValuesPerBlock.push_back(AvailableValueInBlock::get(UnavailablePred,
                                                         NewLoad));
+    MD->invalidateCachedPointerInfo(LoadPtr);
+    DEBUG(dbgs() << "GVN INSERTED " << *NewLoad << '\n');
   }
 
   // Perform PHI construction.