Handle ARM "ret void" and function alignment with proper padding.

src/IceClFlags.h

Index: src/IceClFlags.h
diff --git a/src/IceClFlags.h b/src/IceClFlags.h
index c89e6959e62d9e30c2436b46f530c29486901bce..517c77fc63f1efd9aad19a967740481ead658074 100644
--- a/src/IceClFlags.h
+++ b/src/IceClFlags.h
@@ -86,6 +86,9 @@ public:
   bool shouldRandomizeRegAlloc() const { return RandomRegAlloc; }
   void setShouldRandomizeRegAlloc(bool NewValue) { RandomRegAlloc = NewValue; }
 
+  bool getSkipUnimplemented() const { return SkipUnimplemented; }
+  void setSkipUnimplemented(bool NewValue) { SkipUnimplemented = NewValue; }
+
   bool getSubzeroTimingEnabled() const { return SubzeroTimingEnabled; }
   void setSubzeroTimingEnabled(bool NewValue) {
     SubzeroTimingEnabled = NewValue;
@@ -184,6 +187,7 @@ private:
   bool PhiEdgeSplit;
   bool RandomNopInsertion;
   bool RandomRegAlloc;
+  bool SkipUnimplemented;
   bool SubzeroTimingEnabled;
   bool TimeEachFunction;
   bool UseSandboxing;