[DSE,MSSA] Continue checking more remaining candidates with dbgcnt.

After changing the candidate iteration strategy, we should continue with
the next candidate, rather than breaking out of the loop.

lib/Transforms/Scalar/DeadStoreElimination.cpp

@@ -1929,7 +1929,7 @@ bool eliminateDeadStoresMemorySSA(Function &F, AliasAnalysis &AA,
       }
 
       if (!DebugCounter::shouldExecute(MemorySSACounter))
-        break;
+        continue;
 
       // Check if NI overwrites SI.
       int64_t InstWriteOffset, DepWriteOffset;