ARM32 Vector lowering - scalarize select

src/IceUtils.h

Index: src/IceUtils.h
diff --git a/src/IceUtils.h b/src/IceUtils.h
index f9b03bc75b1f65da97b6f1dc5494750b36af500f..9efd44c3a28b2a991844d7c72ad2168e05afd7ef 100644
--- a/src/IceUtils.h
+++ b/src/IceUtils.h
@@ -123,6 +123,25 @@ template <typename T> static bool isPositiveZero(T Val) {
   return Val == 0 && !std::signbit(Val);
 }
 
+/// A helper class to ensure that a boolean flag is restored to its previous

[Jim Stichnoth, 2016/02/13 05:22:09]

Could you add "RAII" to the comment somewhere?  That should help people (like
me) find it more easily in the future.

[Eric Holk, 2016/02/16 23:05:30]

Sure.

+/// value upon function exist.
+///
+/// Used in places like RandomizationPoolingPause and generating target helper
+/// calls.
+class BoolFlagSaver {
+  BoolFlagSaver() = delete;
+  BoolFlagSaver(const BoolFlagSaver &) = delete;
+  BoolFlagSaver &operator=(const BoolFlagSaver &) = delete;
+
+public:
+  BoolFlagSaver(bool &F, bool NewValue) : OldValue(F), Flag(F) { F = NewValue; }
+  ~BoolFlagSaver() { Flag = OldValue; }
+
+private:
+  const bool OldValue;
+  bool &Flag;
+};
+
 } // end of namespace Utils
 } // end of namespace Ice