Remove unused pattern match functions

Remove sNaN + qNaN patterns added in earlier version of
the patch, since they are no longer used in the new
elementwise approach.

Author: LewisCrawford

llvm/include/llvm/IR/PatternMatch.h

@@ -707,25 +707,10 @@ m_SpecificInt_ICMP(ICmpInst::Predicate Predicate, const APInt &Threshold) {
 struct is_nan {
   bool isValue(const APFloat &C) const { return C.isNaN(); }
 };
-
-struct is_snan {
-  bool isValue(const APFloat &C) const { return C.isSignaling(); }
-};
-
-struct is_qnan {
-  bool isValue(const APFloat &C) const { return C.isNaN() && !C.isSignaling(); }
-};
-
 /// Match an arbitrary NaN constant. This includes quiet and signalling nans.
 /// For vectors, this includes constants with undefined elements.
 inline cstfp_pred_ty<is_nan> m_NaN() { return cstfp_pred_ty<is_nan>(); }
 
-/// Match quiet NaN constants, including vectors with undefined elements.
-inline cstfp_pred_ty<is_qnan> m_qNaN() { return cstfp_pred_ty<is_qnan>(); }
-
-/// Match signalling NaN constants, including vectors with undefined elements.
-inline cstfp_pred_ty<is_snan> m_sNaN() { return cstfp_pred_ty<is_snan>(); }
-
 struct is_nonnan {
   bool isValue(const APFloat &C) const { return !C.isNaN(); }
 };