[LICM] Only forget loop/block dispositions

As we are moving the instruction without changing its value, it
is sufficient to only invalidate the loop/block dispositions.
This is the same we do in LoopSink.

diff --git a/llvm/lib/Transforms/Scalar/LICM.cpp b/llvm/lib/Transforms/Scalar/LICM.cpp
index 5a19451..a498a7c 100644 (file)
--- a/llvm/lib/Transforms/Scalar/LICM.cpp
+++ b/llvm/lib/Transforms/Scalar/LICM.cpp
@@ -1518,7 +1518,7 @@ static void moveInstructionBefore(Instruction &I, Instruction &Dest,
           MSSAU.getMemorySSA()->getMemoryAccess(&I)))
     MSSAU.moveToPlace(OldMemAcc, Dest.getParent(), MemorySSA::BeforeTerminator);
   if (SE)
-    SE->forgetValue(&I);
+    SE->forgetBlockAndLoopDispositions(&I);
 }
 
 static Instruction *sinkThroughTriviallyReplaceablePHI(