substitute oneuse class with HasOneUseUnaryOp

Author: Ana Mihajlovic

llvm/lib/Target/AMDGPU/SIInstructions.td

@@ -3124,12 +3124,12 @@ def IMMBitSelConst : SDNodeXForm<imm, [{
 
 // Handle the VALU case.
 def : GCNPat <
-  (i1 (xor (i1 (DivergentUnaryFrag_oneuse<trunc> i32:$a)), -1)),
+  (i1 (xor (i1 (DivergentUnaryFrag<HasOneUseUnaryOp<trunc>> i32:$a)), -1)),
   (V_CMP_NE_U32_e64 (V_AND_B32_e64 (i32 1), i32:$a), (i32 1))
 >;
 
 def : GCNPat <
-  (i1 (xor (i1 (DivergentUnaryFrag_oneuse<trunc> i64:$a)), -1)),
+  (i1 (xor (i1 (DivergentUnaryFrag<HasOneUseUnaryOp<trunc>> i64:$a)), -1)),
   (V_CMP_NE_U32_e64 (V_AND_B32_e64 (i32 1),
   (i32 (EXTRACT_SUBREG $a, sub0))), (i32 1))
 >;

llvm/lib/Target/AMDGPU/VOPInstructions.td

@@ -1267,19 +1267,6 @@ class DivergentUnaryFrag<SDPatternOperator Op> : PatFrag <
   let GISelPredicateCode = [{return true;}];
 }
 
-class DivergentUnaryFrag_oneuse<SDPatternOperator Op> : PatFrag <
-  (ops node:$src0),
-  (Op $src0),
-  [{ return N->isDivergent(); }]> {
-  // This check is unnecessary as it's captured by the result register
-  // bank constraint.
-  //
-  // FIXME: Should add a way for the emitter to recognize this is a
-  // trivially true predicate to eliminate the check.
-  let GISelPredicateCode = [{return true;}];
-  let HasOneUse = 1;
-}
-
 class VOPPatOrNull<SDPatternOperator Op, VOPProfile P> {
   list<dag> ret = !if(!ne(P.NeedPatGen,PatGenMode.NoPattern), VOPPatGen<Op, P>.ret, []);
 }