Load / store multiple was missing opportunites when the load / store bundles are at the end of the bb. Test case is already in, the bug is exposed by subsequent commit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84842 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMLoadStoreOptimizer.cpp b/lib/Target/ARM/ARMLoadStoreOptimizer.cpp
index d2ec9ee..c9b9e84 100644
--- a/lib/Target/ARM/ARMLoadStoreOptimizer.cpp
+++ b/lib/Target/ARM/ARMLoadStoreOptimizer.cpp
@@ -974,6 +974,9 @@
     if (Advance) {
       ++Position;
       ++MBBI;
+      if (MBBI == E)
+        // Reach the end of the block, try merging the memory instructions.
+        TryMerge = true;
     } else
       TryMerge = true;