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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129287 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineSink.cpp b/lib/CodeGen/MachineSink.cpp
index 8a93a24..916dff7 100644
--- a/lib/CodeGen/MachineSink.cpp
+++ b/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;