Fix a couple of places where changes are made but not tracked.

llvm-svn: 129287
diff --git a/llvm/lib/CodeGen/MachineSink.cpp b/llvm/lib/CodeGen/MachineSink.cpp
index 8a93a24..916dff7 100644
--- a/llvm/lib/CodeGen/MachineSink.cpp
+++ b/llvm/lib/CodeGen/MachineSink.cpp
@@ -265,8 +265,11 @@
     if (MI->isDebugValue())
       continue;
 
-    if (PerformTrivialForwardCoalescing(MI, &MBB))
+    bool Joined = PerformTrivialForwardCoalescing(MI, &MBB);
+    if (Joined) {
+      MadeChange = true;
       continue;
+    }
 
     if (SinkInstruction(MI, SawStore))
       ++NumSunk, MadeChange = true;