diff --git a/src/cmd/compile/internal/arm64/ssa.go b/src/cmd/compile/internal/arm64/ssa.go
index b6bb81a..1d6ea6b 100644
--- a/src/cmd/compile/internal/arm64/ssa.go
+++ b/src/cmd/compile/internal/arm64/ssa.go
@@ -816,7 +816,7 @@
 		}
 		p := s.Prog(v.Op.Asm())
 		p.From.Type = obj.TYPE_REG // assembler encodes conditional bits in Reg
-		p.From.Reg = condBits[v.Aux.(ssa.Op)]
+		p.From.Reg = condBits[ssa.Op(v.AuxInt)]
 		p.Reg = v.Args[0].Reg()
 		p.SetFrom3(obj.Addr{Type: obj.TYPE_REG, Reg: r1})
 		p.To.Type = obj.TYPE_REG
diff --git a/src/cmd/compile/internal/ssa/check.go b/src/cmd/compile/internal/ssa/check.go
index 98e1b79..828f645 100644
--- a/src/cmd/compile/internal/ssa/check.go
+++ b/src/cmd/compile/internal/ssa/check.go
@@ -171,10 +171,10 @@
 				canHaveAuxInt = true
 				canHaveAux = true
 			case auxCCop:
-				if _, ok := v.Aux.(Op); !ok {
-					f.Fatalf("bad type %T for CCop in %v", v.Aux, v)
+				if opcodeTable[Op(v.AuxInt)].name == "OpInvalid" {
+					f.Fatalf("value %v has an AuxInt value that is a valid opcode", v)
 				}
-				canHaveAux = true
+				canHaveAuxInt = true
 			case auxS390XCCMask:
 				if _, ok := v.Aux.(s390x.CCMask); !ok {
 					f.Fatalf("bad type %T for S390XCCMask in %v", v.Aux, v)
diff --git a/src/cmd/compile/internal/ssa/gen/ARM64.rules b/src/cmd/compile/internal/ssa/gen/ARM64.rules
index c29e7f7..311067e 100644
--- a/src/cmd/compile/internal/ssa/gen/ARM64.rules
+++ b/src/cmd/compile/internal/ssa/gen/ARM64.rules
@@ -132,65 +132,65 @@
 // we compare to 64 to ensure Go semantics for large shifts
 // Rules about rotates with non-const shift are based on the following rules,
 // if the following rules change, please also modify the rules based on them.
-(Lsh64x64 <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
-(Lsh64x32 <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
-(Lsh64x16 <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
-(Lsh64x8  <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
+(Lsh64x64 <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
+(Lsh64x32 <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+(Lsh64x16 <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+(Lsh64x8  <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
 
-(Lsh32x64 <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
-(Lsh32x32 <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
-(Lsh32x16 <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
-(Lsh32x8  <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
+(Lsh32x64 <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
+(Lsh32x32 <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+(Lsh32x16 <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+(Lsh32x8  <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
 
-(Lsh16x64 <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
-(Lsh16x32 <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
-(Lsh16x16 <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
-(Lsh16x8  <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
+(Lsh16x64 <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
+(Lsh16x32 <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+(Lsh16x16 <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+(Lsh16x8  <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
 
-(Lsh8x64 <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
-(Lsh8x32 <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
-(Lsh8x16 <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
-(Lsh8x8  <t> x y) => (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
+(Lsh8x64 <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
+(Lsh8x32 <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+(Lsh8x16 <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+(Lsh8x8  <t> x y) => (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
 
-(Rsh64Ux64 <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
-(Rsh64Ux32 <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
-(Rsh64Ux16 <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
-(Rsh64Ux8  <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> x (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
+(Rsh64Ux64 <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
+(Rsh64Ux32 <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+(Rsh64Ux16 <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+(Rsh64Ux8  <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> x (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
 
-(Rsh32Ux64 <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt32to64 x) y) (Const64 <t> [0]) (CMPconst [64] y))
-(Rsh32Ux32 <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt32to64 x) (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
-(Rsh32Ux16 <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt32to64 x) (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
-(Rsh32Ux8  <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt32to64 x) (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
+(Rsh32Ux64 <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt32to64 x) y) (Const64 <t> [0]) (CMPconst [64] y))
+(Rsh32Ux32 <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt32to64 x) (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+(Rsh32Ux16 <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt32to64 x) (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+(Rsh32Ux8  <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt32to64 x) (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
 
-(Rsh16Ux64 <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt16to64 x) y) (Const64 <t> [0]) (CMPconst [64] y))
-(Rsh16Ux32 <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt16to64 x) (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
-(Rsh16Ux16 <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt16to64 x) (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
-(Rsh16Ux8  <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt16to64 x) (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
+(Rsh16Ux64 <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt16to64 x) y) (Const64 <t> [0]) (CMPconst [64] y))
+(Rsh16Ux32 <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt16to64 x) (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+(Rsh16Ux16 <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt16to64 x) (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+(Rsh16Ux8  <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt16to64 x) (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
 
-(Rsh8Ux64 <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt8to64 x) y) (Const64 <t> [0]) (CMPconst [64] y))
-(Rsh8Ux32 <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt8to64 x) (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
-(Rsh8Ux16 <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt8to64 x) (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
-(Rsh8Ux8  <t> x y) => (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt8to64 x) (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
+(Rsh8Ux64 <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt8to64 x) y) (Const64 <t> [0]) (CMPconst [64] y))
+(Rsh8Ux32 <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt8to64 x) (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+(Rsh8Ux16 <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt8to64 x) (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+(Rsh8Ux8  <t> x y) => (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt8to64 x) (ZeroExt8to64  y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64  y)))
 
-(Rsh64x64 x y) => (SRA x (CSEL {OpARM64LessThanU} <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
-(Rsh64x32 x y) => (SRA x (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
-(Rsh64x16 x y) => (SRA x (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
-(Rsh64x8  x y) => (SRA x (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt8to64  y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64  y))))
+(Rsh64x64 x y) => (SRA x (CSEL [OpARM64LessThanU] <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
+(Rsh64x32 x y) => (SRA x (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
+(Rsh64x16 x y) => (SRA x (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
+(Rsh64x8  x y) => (SRA x (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt8to64  y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64  y))))
 
-(Rsh32x64 x y) => (SRA (SignExt32to64 x) (CSEL {OpARM64LessThanU} <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
-(Rsh32x32 x y) => (SRA (SignExt32to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
-(Rsh32x16 x y) => (SRA (SignExt32to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
-(Rsh32x8  x y) => (SRA (SignExt32to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt8to64  y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64  y))))
+(Rsh32x64 x y) => (SRA (SignExt32to64 x) (CSEL [OpARM64LessThanU] <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
+(Rsh32x32 x y) => (SRA (SignExt32to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
+(Rsh32x16 x y) => (SRA (SignExt32to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
+(Rsh32x8  x y) => (SRA (SignExt32to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt8to64  y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64  y))))
 
-(Rsh16x64 x y) => (SRA (SignExt16to64 x) (CSEL {OpARM64LessThanU} <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
-(Rsh16x32 x y) => (SRA (SignExt16to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
-(Rsh16x16 x y) => (SRA (SignExt16to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
-(Rsh16x8  x y) => (SRA (SignExt16to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt8to64  y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64  y))))
+(Rsh16x64 x y) => (SRA (SignExt16to64 x) (CSEL [OpARM64LessThanU] <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
+(Rsh16x32 x y) => (SRA (SignExt16to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
+(Rsh16x16 x y) => (SRA (SignExt16to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
+(Rsh16x8  x y) => (SRA (SignExt16to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt8to64  y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64  y))))
 
-(Rsh8x64 x y) => (SRA (SignExt8to64 x) (CSEL {OpARM64LessThanU} <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
-(Rsh8x32 x y) => (SRA (SignExt8to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
-(Rsh8x16 x y) => (SRA (SignExt8to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
-(Rsh8x8  x y) => (SRA (SignExt8to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt8to64  y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64  y))))
+(Rsh8x64 x y) => (SRA (SignExt8to64 x) (CSEL [OpARM64LessThanU] <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
+(Rsh8x32 x y) => (SRA (SignExt8to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
+(Rsh8x16 x y) => (SRA (SignExt8to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
+(Rsh8x8  x y) => (SRA (SignExt8to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt8to64  y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64  y))))
 
 // constants
 (Const(64|32|16|8) [val]) => (MOVDconst [int64(val)])
@@ -315,8 +315,8 @@
 (FCMPD (FMOVDconst [0]) x) => (InvertFlags (FCMPD0 x))
 
 // CSEL needs a flag-generating argument. Synthesize a CMPW if necessary.
-(CondSelect x y boolval) && flagArg(boolval) != nil => (CSEL {boolval.Op} x y flagArg(boolval))
-(CondSelect x y boolval) && flagArg(boolval) == nil => (CSEL {OpARM64NotEqual} x y (CMPWconst [0] boolval))
+(CondSelect x y boolval) && flagArg(boolval) != nil => (CSEL [boolval.Op] x y flagArg(boolval))
+(CondSelect x y boolval) && flagArg(boolval) == nil => (CSEL [OpARM64NotEqual] x y (CMPWconst [0] boolval))
 
 (OffPtr [off] ptr:(SP)) && is32Bit(off) => (MOVDaddr [int32(off)] ptr)
 (OffPtr [off] ptr) => (ADDconst [off] ptr)
@@ -1324,8 +1324,8 @@
 (XOR x (MVN y)) -> (EON x y)
 (OR  x (MVN y)) -> (ORN x y)
 (MVN (XOR x y)) -> (EON x y)
-(CSEL {cc} x (MOVDconst [0]) flag) -> (CSEL0 {cc} x flag)
-(CSEL {cc} (MOVDconst [0]) y flag) -> (CSEL0 {arm64Negate(cc.(Op))} y flag)
+(CSEL [cc] x (MOVDconst [0]) flag) => (CSEL0 [cc] x flag)
+(CSEL [cc] (MOVDconst [0]) y flag) => (CSEL0 [arm64Negate(cc)] y flag)
 (SUB x (SUB y z)) -> (SUB (ADD <v.Type> x z) y)
 (SUB (SUB x y) z) -> (SUB x (ADD <y.Type> y z))
 
@@ -1481,8 +1481,8 @@
 (GTnoov (InvertFlags cmp) yes no) => (LTnoov cmp yes no)
 
 // absorb InvertFlags into CSEL(0)
-(CSEL {cc} x y (InvertFlags cmp)) => (CSEL {arm64Invert(cc)} x y cmp)
-(CSEL0 {cc} x (InvertFlags cmp)) => (CSEL0 {arm64Invert(cc)} x cmp)
+(CSEL [cc] x y (InvertFlags cmp)) => (CSEL [arm64Invert(cc)] x y cmp)
+(CSEL0 [cc] x (InvertFlags cmp)) => (CSEL0 [arm64Invert(cc)] x cmp)
 
 // absorb flag constants into boolean values
 (Equal (FlagConstant [fc])) => (MOVDconst [b2i(fc.eq())])
@@ -1517,20 +1517,20 @@
 (MOVBUreg x) && x.Type.IsBoolean() => (MOVDreg x)
 
 // absorb flag constants into conditional instructions
-(CSEL {cc} x _ flag) && ccARM64Eval(cc, flag) > 0 => x
-(CSEL {cc} _ y flag) && ccARM64Eval(cc, flag) < 0 => y
-(CSEL0 {cc} x flag) && ccARM64Eval(cc, flag) > 0 => x
-(CSEL0 {cc} _ flag) && ccARM64Eval(cc, flag) < 0 => (MOVDconst [0])
+(CSEL [cc] x _ flag) && ccARM64Eval(cc, flag) > 0 => x
+(CSEL [cc] _ y flag) && ccARM64Eval(cc, flag) < 0 => y
+(CSEL0 [cc] x flag) && ccARM64Eval(cc, flag) > 0 => x
+(CSEL0 [cc] _ flag) && ccARM64Eval(cc, flag) < 0 => (MOVDconst [0])
 
 // absorb flags back into boolean CSEL
-(CSEL {cc} x y (CMPWconst [0] boolval)) && cc == OpARM64NotEqual && flagArg(boolval) != nil =>
-      (CSEL {boolval.Op} x y flagArg(boolval))
-(CSEL {cc} x y (CMPWconst [0] boolval)) && cc == OpARM64Equal && flagArg(boolval) != nil =>
-      (CSEL {arm64Negate(boolval.Op)} x y flagArg(boolval))
-(CSEL0 {cc} x (CMPWconst [0] boolval)) && cc == OpARM64NotEqual && flagArg(boolval) != nil =>
-      (CSEL0 {boolval.Op} x flagArg(boolval))
-(CSEL0 {cc} x (CMPWconst [0] boolval)) && cc == OpARM64Equal && flagArg(boolval) != nil =>
-      (CSEL0 {arm64Negate(boolval.Op)} x flagArg(boolval))
+(CSEL [cc] x y (CMPWconst [0] boolval)) && cc == OpARM64NotEqual && flagArg(boolval) != nil =>
+      (CSEL [boolval.Op] x y flagArg(boolval))
+(CSEL [cc] x y (CMPWconst [0] boolval)) && cc == OpARM64Equal && flagArg(boolval) != nil =>
+      (CSEL [arm64Negate(boolval.Op)] x y flagArg(boolval))
+(CSEL0 [cc] x (CMPWconst [0] boolval)) && cc == OpARM64NotEqual && flagArg(boolval) != nil =>
+      (CSEL0 [boolval.Op] x flagArg(boolval))
+(CSEL0 [cc] x (CMPWconst [0] boolval)) && cc == OpARM64Equal && flagArg(boolval) != nil =>
+      (CSEL0 [arm64Negate(boolval.Op)] x flagArg(boolval))
 
 // absorb shifts into ops
 (NEG x:(SLLconst [c] y)) && clobberIfDead(x) => (NEGshiftLL [c] y)
@@ -1691,11 +1691,11 @@
 // "|" can also be "^" or "+".
 // As arm64 does not have a ROL instruction, so ROL(x, y) is replaced by ROR(x, -y).
 ((ADD|OR|XOR) (SLL x (ANDconst <t> [63] y))
-	(CSEL0 <typ.UInt64> {cc} (SRL <typ.UInt64> x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))
+	(CSEL0 <typ.UInt64> [cc] (SRL <typ.UInt64> x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))
 		(CMPconst [64] (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y))))) && cc == OpARM64LessThanU
 	=> (ROR x (NEG <t> y))
 ((ADD|OR|XOR) (SRL <typ.UInt64> x (ANDconst <t> [63] y))
-	(CSEL0 <typ.UInt64> {cc} (SLL x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))
+	(CSEL0 <typ.UInt64> [cc] (SLL x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))
 		(CMPconst [64] (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y))))) && cc == OpARM64LessThanU
 	=> (ROR x y)
 
@@ -1705,11 +1705,11 @@
 // "|" can also be "^" or "+".
 // As arm64 does not have a ROLW instruction, so ROLW(x, y) is replaced by RORW(x, -y).
 ((ADD|OR|XOR) (SLL x (ANDconst <t> [31] y))
-	(CSEL0 <typ.UInt32> {cc} (SRL <typ.UInt32> (MOVWUreg x) (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))
+	(CSEL0 <typ.UInt32> [cc] (SRL <typ.UInt32> (MOVWUreg x) (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))
 		(CMPconst [64]  (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y))))) && cc == OpARM64LessThanU
 	=> (RORW x (NEG <t> y))
 ((ADD|OR|XOR) (SRL <typ.UInt32> (MOVWUreg x) (ANDconst <t> [31] y))
-	(CSEL0 <typ.UInt32> {cc} (SLL x (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))
+	(CSEL0 <typ.UInt32> [cc] (SLL x (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))
 		(CMPconst [64]  (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y))))) && cc == OpARM64LessThanU
 	=> (RORW x y)
 
diff --git a/src/cmd/compile/internal/ssa/gen/ARM64Ops.go b/src/cmd/compile/internal/ssa/gen/ARM64Ops.go
index 2424e67..e9af261 100644
--- a/src/cmd/compile/internal/ssa/gen/ARM64Ops.go
+++ b/src/cmd/compile/internal/ssa/gen/ARM64Ops.go
@@ -467,8 +467,8 @@
 
 		// conditional instructions; auxint is
 		// one of the arm64 comparison pseudo-ops (LessThan, LessThanU, etc.)
-		{name: "CSEL", argLength: 3, reg: gp2flags1, asm: "CSEL", aux: "CCop"},  // aux(flags) ? arg0 : arg1
-		{name: "CSEL0", argLength: 2, reg: gp1flags1, asm: "CSEL", aux: "CCop"}, // aux(flags) ? arg0 : 0
+		{name: "CSEL", argLength: 3, reg: gp2flags1, asm: "CSEL", aux: "CCop"},  // auxint(flags) ? arg0 : arg1
+		{name: "CSEL0", argLength: 2, reg: gp1flags1, asm: "CSEL", aux: "CCop"}, // auxint(flags) ? arg0 : 0
 
 		// function calls
 		{name: "CALLstatic", argLength: 1, reg: regInfo{clobbers: callerSave}, aux: "SymOff", clobberFlags: true, call: true, symEffect: "None"},                           // call static function aux.(*obj.LSym).  arg0=mem, auxint=argsize, returns mem
diff --git a/src/cmd/compile/internal/ssa/gen/rulegen.go b/src/cmd/compile/internal/ssa/gen/rulegen.go
index e520503..9e2e112 100644
--- a/src/cmd/compile/internal/ssa/gen/rulegen.go
+++ b/src/cmd/compile/internal/ssa/gen/rulegen.go
@@ -1423,7 +1423,8 @@
 
 func opHasAuxInt(op opData) bool {
 	switch op.aux {
-	case "Bool", "Int8", "Int16", "Int32", "Int64", "Int128", "Float32", "Float64", "SymOff", "SymValAndOff", "TypSize", "ARM64BitField", "FlagConstant":
+	case "Bool", "Int8", "Int16", "Int32", "Int64", "Int128", "Float32", "Float64",
+		"SymOff", "SymValAndOff", "TypSize", "ARM64BitField", "FlagConstant", "CCop":
 		return true
 	}
 	return false
@@ -1431,7 +1432,7 @@
 
 func opHasAux(op opData) bool {
 	switch op.aux {
-	case "String", "Sym", "SymOff", "SymValAndOff", "Typ", "TypSize", "CCop",
+	case "String", "Sym", "SymOff", "SymValAndOff", "Typ", "TypSize",
 		"S390XCCMask", "S390XRotateParams":
 		return true
 	}
@@ -1784,8 +1785,6 @@
 		return "s390x.CCMask"
 	case "S390XRotateParams":
 		return "s390x.RotateParams"
-	case "CCop":
-		return "CCop"
 	default:
 		return "invalid"
 	}
diff --git a/src/cmd/compile/internal/ssa/rewrite.go b/src/cmd/compile/internal/ssa/rewrite.go
index 3df9ad2..09f94ef 100644
--- a/src/cmd/compile/internal/ssa/rewrite.go
+++ b/src/cmd/compile/internal/ssa/rewrite.go
@@ -651,6 +651,10 @@
 	return flagConstant(x)
 }
 
+func auxIntToOp(cc int64) Op {
+	return Op(cc)
+}
+
 func boolToAuxInt(b bool) int64 {
 	if b {
 		return 1
@@ -694,6 +698,10 @@
 	return int64(x)
 }
 
+func opToAuxInt(o Op) int64 {
+	return int64(o)
+}
+
 func auxToString(i interface{}) string {
 	return i.(string)
 }
@@ -727,13 +735,6 @@
 func s390xRotateParamsToAux(r s390x.RotateParams) interface{} {
 	return r
 }
-func cCopToAux(o Op) interface{} {
-	return o
-}
-
-func auxToCCop(cc interface{}) Op {
-	return cc.(Op)
-}
 
 // uaddOvf reports whether unsigned a+b would overflow.
 func uaddOvf(a, b int64) bool {
diff --git a/src/cmd/compile/internal/ssa/rewriteARM64.go b/src/cmd/compile/internal/ssa/rewriteARM64.go
index 453578a..0fb86b6 100644
--- a/src/cmd/compile/internal/ssa/rewriteARM64.go
+++ b/src/cmd/compile/internal/ssa/rewriteARM64.go
@@ -1285,7 +1285,7 @@
 		}
 		break
 	}
-	// match: (ADD (SLL x (ANDconst <t> [63] y)) (CSEL0 <typ.UInt64> {cc} (SRL <typ.UInt64> x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y))) (CMPconst [64] (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))))
+	// match: (ADD (SLL x (ANDconst <t> [63] y)) (CSEL0 <typ.UInt64> [cc] (SRL <typ.UInt64> x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y))) (CMPconst [64] (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))))
 	// cond: cc == OpARM64LessThanU
 	// result: (ROR x (NEG <t> y))
 	for {
@@ -1307,7 +1307,7 @@
 			if v_1.Op != OpARM64CSEL0 || v_1.Type != typ.UInt64 {
 				continue
 			}
-			cc := auxToCCop(v_1.Aux)
+			cc := auxIntToOp(v_1.AuxInt)
 			_ = v_1.Args[1]
 			v_1_0 := v_1.Args[0]
 			if v_1_0.Op != OpARM64SRL || v_1_0.Type != typ.UInt64 {
@@ -1355,7 +1355,7 @@
 		}
 		break
 	}
-	// match: (ADD (SRL <typ.UInt64> x (ANDconst <t> [63] y)) (CSEL0 <typ.UInt64> {cc} (SLL x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y))) (CMPconst [64] (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))))
+	// match: (ADD (SRL <typ.UInt64> x (ANDconst <t> [63] y)) (CSEL0 <typ.UInt64> [cc] (SLL x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y))) (CMPconst [64] (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))))
 	// cond: cc == OpARM64LessThanU
 	// result: (ROR x y)
 	for {
@@ -1377,7 +1377,7 @@
 			if v_1.Op != OpARM64CSEL0 || v_1.Type != typ.UInt64 {
 				continue
 			}
-			cc := auxToCCop(v_1.Aux)
+			cc := auxIntToOp(v_1.AuxInt)
 			_ = v_1.Args[1]
 			v_1_0 := v_1.Args[0]
 			if v_1_0.Op != OpARM64SLL {
@@ -1423,7 +1423,7 @@
 		}
 		break
 	}
-	// match: (ADD (SLL x (ANDconst <t> [31] y)) (CSEL0 <typ.UInt32> {cc} (SRL <typ.UInt32> (MOVWUreg x) (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y))) (CMPconst [64] (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))))
+	// match: (ADD (SLL x (ANDconst <t> [31] y)) (CSEL0 <typ.UInt32> [cc] (SRL <typ.UInt32> (MOVWUreg x) (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y))) (CMPconst [64] (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))))
 	// cond: cc == OpARM64LessThanU
 	// result: (RORW x (NEG <t> y))
 	for {
@@ -1445,7 +1445,7 @@
 			if v_1.Op != OpARM64CSEL0 || v_1.Type != typ.UInt32 {
 				continue
 			}
-			cc := auxToCCop(v_1.Aux)
+			cc := auxIntToOp(v_1.AuxInt)
 			_ = v_1.Args[1]
 			v_1_0 := v_1.Args[0]
 			if v_1_0.Op != OpARM64SRL || v_1_0.Type != typ.UInt32 {
@@ -1494,7 +1494,7 @@
 		}
 		break
 	}
-	// match: (ADD (SRL <typ.UInt32> (MOVWUreg x) (ANDconst <t> [31] y)) (CSEL0 <typ.UInt32> {cc} (SLL x (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y))) (CMPconst [64] (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))))
+	// match: (ADD (SRL <typ.UInt32> (MOVWUreg x) (ANDconst <t> [31] y)) (CSEL0 <typ.UInt32> [cc] (SLL x (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y))) (CMPconst [64] (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))))
 	// cond: cc == OpARM64LessThanU
 	// result: (RORW x y)
 	for {
@@ -1520,7 +1520,7 @@
 			if v_1.Op != OpARM64CSEL0 || v_1.Type != typ.UInt32 {
 				continue
 			}
-			cc := auxToCCop(v_1.Aux)
+			cc := auxIntToOp(v_1.AuxInt)
 			_ = v_1.Args[1]
 			v_1_0 := v_1.Args[0]
 			if v_1_0.Op != OpARM64SLL {
@@ -3178,38 +3178,38 @@
 	v_2 := v.Args[2]
 	v_1 := v.Args[1]
 	v_0 := v.Args[0]
-	// match: (CSEL {cc} x (MOVDconst [0]) flag)
-	// result: (CSEL0 {cc} x flag)
+	// match: (CSEL [cc] x (MOVDconst [0]) flag)
+	// result: (CSEL0 [cc] x flag)
 	for {
-		cc := v.Aux
+		cc := auxIntToOp(v.AuxInt)
 		x := v_0
-		if v_1.Op != OpARM64MOVDconst || v_1.AuxInt != 0 {
+		if v_1.Op != OpARM64MOVDconst || auxIntToInt64(v_1.AuxInt) != 0 {
 			break
 		}
 		flag := v_2
 		v.reset(OpARM64CSEL0)
-		v.Aux = cc
+		v.AuxInt = opToAuxInt(cc)
 		v.AddArg2(x, flag)
 		return true
 	}
-	// match: (CSEL {cc} (MOVDconst [0]) y flag)
-	// result: (CSEL0 {arm64Negate(cc.(Op))} y flag)
+	// match: (CSEL [cc] (MOVDconst [0]) y flag)
+	// result: (CSEL0 [arm64Negate(cc)] y flag)
 	for {
-		cc := v.Aux
-		if v_0.Op != OpARM64MOVDconst || v_0.AuxInt != 0 {
+		cc := auxIntToOp(v.AuxInt)
+		if v_0.Op != OpARM64MOVDconst || auxIntToInt64(v_0.AuxInt) != 0 {
 			break
 		}
 		y := v_1
 		flag := v_2
 		v.reset(OpARM64CSEL0)
-		v.Aux = arm64Negate(cc.(Op))
+		v.AuxInt = opToAuxInt(arm64Negate(cc))
 		v.AddArg2(y, flag)
 		return true
 	}
-	// match: (CSEL {cc} x y (InvertFlags cmp))
-	// result: (CSEL {arm64Invert(cc)} x y cmp)
+	// match: (CSEL [cc] x y (InvertFlags cmp))
+	// result: (CSEL [arm64Invert(cc)] x y cmp)
 	for {
-		cc := auxToCCop(v.Aux)
+		cc := auxIntToOp(v.AuxInt)
 		x := v_0
 		y := v_1
 		if v_2.Op != OpARM64InvertFlags {
@@ -3217,15 +3217,15 @@
 		}
 		cmp := v_2.Args[0]
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(arm64Invert(cc))
+		v.AuxInt = opToAuxInt(arm64Invert(cc))
 		v.AddArg3(x, y, cmp)
 		return true
 	}
-	// match: (CSEL {cc} x _ flag)
+	// match: (CSEL [cc] x _ flag)
 	// cond: ccARM64Eval(cc, flag) > 0
 	// result: x
 	for {
-		cc := auxToCCop(v.Aux)
+		cc := auxIntToOp(v.AuxInt)
 		x := v_0
 		flag := v_2
 		if !(ccARM64Eval(cc, flag) > 0) {
@@ -3234,11 +3234,11 @@
 		v.copyOf(x)
 		return true
 	}
-	// match: (CSEL {cc} _ y flag)
+	// match: (CSEL [cc] _ y flag)
 	// cond: ccARM64Eval(cc, flag) < 0
 	// result: y
 	for {
-		cc := auxToCCop(v.Aux)
+		cc := auxIntToOp(v.AuxInt)
 		y := v_1
 		flag := v_2
 		if !(ccARM64Eval(cc, flag) < 0) {
@@ -3247,11 +3247,11 @@
 		v.copyOf(y)
 		return true
 	}
-	// match: (CSEL {cc} x y (CMPWconst [0] boolval))
+	// match: (CSEL [cc] x y (CMPWconst [0] boolval))
 	// cond: cc == OpARM64NotEqual && flagArg(boolval) != nil
-	// result: (CSEL {boolval.Op} x y flagArg(boolval))
+	// result: (CSEL [boolval.Op] x y flagArg(boolval))
 	for {
-		cc := auxToCCop(v.Aux)
+		cc := auxIntToOp(v.AuxInt)
 		x := v_0
 		y := v_1
 		if v_2.Op != OpARM64CMPWconst || auxIntToInt32(v_2.AuxInt) != 0 {
@@ -3262,15 +3262,15 @@
 			break
 		}
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(boolval.Op)
+		v.AuxInt = opToAuxInt(boolval.Op)
 		v.AddArg3(x, y, flagArg(boolval))
 		return true
 	}
-	// match: (CSEL {cc} x y (CMPWconst [0] boolval))
+	// match: (CSEL [cc] x y (CMPWconst [0] boolval))
 	// cond: cc == OpARM64Equal && flagArg(boolval) != nil
-	// result: (CSEL {arm64Negate(boolval.Op)} x y flagArg(boolval))
+	// result: (CSEL [arm64Negate(boolval.Op)] x y flagArg(boolval))
 	for {
-		cc := auxToCCop(v.Aux)
+		cc := auxIntToOp(v.AuxInt)
 		x := v_0
 		y := v_1
 		if v_2.Op != OpARM64CMPWconst || auxIntToInt32(v_2.AuxInt) != 0 {
@@ -3281,7 +3281,7 @@
 			break
 		}
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(arm64Negate(boolval.Op))
+		v.AuxInt = opToAuxInt(arm64Negate(boolval.Op))
 		v.AddArg3(x, y, flagArg(boolval))
 		return true
 	}
@@ -3290,25 +3290,25 @@
 func rewriteValueARM64_OpARM64CSEL0(v *Value) bool {
 	v_1 := v.Args[1]
 	v_0 := v.Args[0]
-	// match: (CSEL0 {cc} x (InvertFlags cmp))
-	// result: (CSEL0 {arm64Invert(cc)} x cmp)
+	// match: (CSEL0 [cc] x (InvertFlags cmp))
+	// result: (CSEL0 [arm64Invert(cc)] x cmp)
 	for {
-		cc := auxToCCop(v.Aux)
+		cc := auxIntToOp(v.AuxInt)
 		x := v_0
 		if v_1.Op != OpARM64InvertFlags {
 			break
 		}
 		cmp := v_1.Args[0]
 		v.reset(OpARM64CSEL0)
-		v.Aux = cCopToAux(arm64Invert(cc))
+		v.AuxInt = opToAuxInt(arm64Invert(cc))
 		v.AddArg2(x, cmp)
 		return true
 	}
-	// match: (CSEL0 {cc} x flag)
+	// match: (CSEL0 [cc] x flag)
 	// cond: ccARM64Eval(cc, flag) > 0
 	// result: x
 	for {
-		cc := auxToCCop(v.Aux)
+		cc := auxIntToOp(v.AuxInt)
 		x := v_0
 		flag := v_1
 		if !(ccARM64Eval(cc, flag) > 0) {
@@ -3317,11 +3317,11 @@
 		v.copyOf(x)
 		return true
 	}
-	// match: (CSEL0 {cc} _ flag)
+	// match: (CSEL0 [cc] _ flag)
 	// cond: ccARM64Eval(cc, flag) < 0
 	// result: (MOVDconst [0])
 	for {
-		cc := auxToCCop(v.Aux)
+		cc := auxIntToOp(v.AuxInt)
 		flag := v_1
 		if !(ccARM64Eval(cc, flag) < 0) {
 			break
@@ -3330,11 +3330,11 @@
 		v.AuxInt = int64ToAuxInt(0)
 		return true
 	}
-	// match: (CSEL0 {cc} x (CMPWconst [0] boolval))
+	// match: (CSEL0 [cc] x (CMPWconst [0] boolval))
 	// cond: cc == OpARM64NotEqual && flagArg(boolval) != nil
-	// result: (CSEL0 {boolval.Op} x flagArg(boolval))
+	// result: (CSEL0 [boolval.Op] x flagArg(boolval))
 	for {
-		cc := auxToCCop(v.Aux)
+		cc := auxIntToOp(v.AuxInt)
 		x := v_0
 		if v_1.Op != OpARM64CMPWconst || auxIntToInt32(v_1.AuxInt) != 0 {
 			break
@@ -3344,15 +3344,15 @@
 			break
 		}
 		v.reset(OpARM64CSEL0)
-		v.Aux = cCopToAux(boolval.Op)
+		v.AuxInt = opToAuxInt(boolval.Op)
 		v.AddArg2(x, flagArg(boolval))
 		return true
 	}
-	// match: (CSEL0 {cc} x (CMPWconst [0] boolval))
+	// match: (CSEL0 [cc] x (CMPWconst [0] boolval))
 	// cond: cc == OpARM64Equal && flagArg(boolval) != nil
-	// result: (CSEL0 {arm64Negate(boolval.Op)} x flagArg(boolval))
+	// result: (CSEL0 [arm64Negate(boolval.Op)] x flagArg(boolval))
 	for {
-		cc := auxToCCop(v.Aux)
+		cc := auxIntToOp(v.AuxInt)
 		x := v_0
 		if v_1.Op != OpARM64CMPWconst || auxIntToInt32(v_1.AuxInt) != 0 {
 			break
@@ -3362,7 +3362,7 @@
 			break
 		}
 		v.reset(OpARM64CSEL0)
-		v.Aux = cCopToAux(arm64Negate(boolval.Op))
+		v.AuxInt = opToAuxInt(arm64Negate(boolval.Op))
 		v.AddArg2(x, flagArg(boolval))
 		return true
 	}
@@ -15043,7 +15043,7 @@
 		}
 		break
 	}
-	// match: (OR (SLL x (ANDconst <t> [63] y)) (CSEL0 <typ.UInt64> {cc} (SRL <typ.UInt64> x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y))) (CMPconst [64] (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))))
+	// match: (OR (SLL x (ANDconst <t> [63] y)) (CSEL0 <typ.UInt64> [cc] (SRL <typ.UInt64> x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y))) (CMPconst [64] (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))))
 	// cond: cc == OpARM64LessThanU
 	// result: (ROR x (NEG <t> y))
 	for {
@@ -15065,7 +15065,7 @@
 			if v_1.Op != OpARM64CSEL0 || v_1.Type != typ.UInt64 {
 				continue
 			}
-			cc := auxToCCop(v_1.Aux)
+			cc := auxIntToOp(v_1.AuxInt)
 			_ = v_1.Args[1]
 			v_1_0 := v_1.Args[0]
 			if v_1_0.Op != OpARM64SRL || v_1_0.Type != typ.UInt64 {
@@ -15113,7 +15113,7 @@
 		}
 		break
 	}
-	// match: (OR (SRL <typ.UInt64> x (ANDconst <t> [63] y)) (CSEL0 <typ.UInt64> {cc} (SLL x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y))) (CMPconst [64] (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))))
+	// match: (OR (SRL <typ.UInt64> x (ANDconst <t> [63] y)) (CSEL0 <typ.UInt64> [cc] (SLL x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y))) (CMPconst [64] (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))))
 	// cond: cc == OpARM64LessThanU
 	// result: (ROR x y)
 	for {
@@ -15135,7 +15135,7 @@
 			if v_1.Op != OpARM64CSEL0 || v_1.Type != typ.UInt64 {
 				continue
 			}
-			cc := auxToCCop(v_1.Aux)
+			cc := auxIntToOp(v_1.AuxInt)
 			_ = v_1.Args[1]
 			v_1_0 := v_1.Args[0]
 			if v_1_0.Op != OpARM64SLL {
@@ -15181,7 +15181,7 @@
 		}
 		break
 	}
-	// match: (OR (SLL x (ANDconst <t> [31] y)) (CSEL0 <typ.UInt32> {cc} (SRL <typ.UInt32> (MOVWUreg x) (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y))) (CMPconst [64] (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))))
+	// match: (OR (SLL x (ANDconst <t> [31] y)) (CSEL0 <typ.UInt32> [cc] (SRL <typ.UInt32> (MOVWUreg x) (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y))) (CMPconst [64] (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))))
 	// cond: cc == OpARM64LessThanU
 	// result: (RORW x (NEG <t> y))
 	for {
@@ -15203,7 +15203,7 @@
 			if v_1.Op != OpARM64CSEL0 || v_1.Type != typ.UInt32 {
 				continue
 			}
-			cc := auxToCCop(v_1.Aux)
+			cc := auxIntToOp(v_1.AuxInt)
 			_ = v_1.Args[1]
 			v_1_0 := v_1.Args[0]
 			if v_1_0.Op != OpARM64SRL || v_1_0.Type != typ.UInt32 {
@@ -15252,7 +15252,7 @@
 		}
 		break
 	}
-	// match: (OR (SRL <typ.UInt32> (MOVWUreg x) (ANDconst <t> [31] y)) (CSEL0 <typ.UInt32> {cc} (SLL x (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y))) (CMPconst [64] (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))))
+	// match: (OR (SRL <typ.UInt32> (MOVWUreg x) (ANDconst <t> [31] y)) (CSEL0 <typ.UInt32> [cc] (SLL x (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y))) (CMPconst [64] (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))))
 	// cond: cc == OpARM64LessThanU
 	// result: (RORW x y)
 	for {
@@ -15278,7 +15278,7 @@
 			if v_1.Op != OpARM64CSEL0 || v_1.Type != typ.UInt32 {
 				continue
 			}
-			cc := auxToCCop(v_1.Aux)
+			cc := auxIntToOp(v_1.AuxInt)
 			_ = v_1.Args[1]
 			v_1_0 := v_1.Args[0]
 			if v_1_0.Op != OpARM64SLL {
@@ -20713,7 +20713,7 @@
 		}
 		break
 	}
-	// match: (XOR (SLL x (ANDconst <t> [63] y)) (CSEL0 <typ.UInt64> {cc} (SRL <typ.UInt64> x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y))) (CMPconst [64] (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))))
+	// match: (XOR (SLL x (ANDconst <t> [63] y)) (CSEL0 <typ.UInt64> [cc] (SRL <typ.UInt64> x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y))) (CMPconst [64] (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))))
 	// cond: cc == OpARM64LessThanU
 	// result: (ROR x (NEG <t> y))
 	for {
@@ -20735,7 +20735,7 @@
 			if v_1.Op != OpARM64CSEL0 || v_1.Type != typ.UInt64 {
 				continue
 			}
-			cc := auxToCCop(v_1.Aux)
+			cc := auxIntToOp(v_1.AuxInt)
 			_ = v_1.Args[1]
 			v_1_0 := v_1.Args[0]
 			if v_1_0.Op != OpARM64SRL || v_1_0.Type != typ.UInt64 {
@@ -20783,7 +20783,7 @@
 		}
 		break
 	}
-	// match: (XOR (SRL <typ.UInt64> x (ANDconst <t> [63] y)) (CSEL0 <typ.UInt64> {cc} (SLL x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y))) (CMPconst [64] (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))))
+	// match: (XOR (SRL <typ.UInt64> x (ANDconst <t> [63] y)) (CSEL0 <typ.UInt64> [cc] (SLL x (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y))) (CMPconst [64] (SUB <t> (MOVDconst [64]) (ANDconst <t> [63] y)))))
 	// cond: cc == OpARM64LessThanU
 	// result: (ROR x y)
 	for {
@@ -20805,7 +20805,7 @@
 			if v_1.Op != OpARM64CSEL0 || v_1.Type != typ.UInt64 {
 				continue
 			}
-			cc := auxToCCop(v_1.Aux)
+			cc := auxIntToOp(v_1.AuxInt)
 			_ = v_1.Args[1]
 			v_1_0 := v_1.Args[0]
 			if v_1_0.Op != OpARM64SLL {
@@ -20851,7 +20851,7 @@
 		}
 		break
 	}
-	// match: (XOR (SLL x (ANDconst <t> [31] y)) (CSEL0 <typ.UInt32> {cc} (SRL <typ.UInt32> (MOVWUreg x) (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y))) (CMPconst [64] (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))))
+	// match: (XOR (SLL x (ANDconst <t> [31] y)) (CSEL0 <typ.UInt32> [cc] (SRL <typ.UInt32> (MOVWUreg x) (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y))) (CMPconst [64] (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))))
 	// cond: cc == OpARM64LessThanU
 	// result: (RORW x (NEG <t> y))
 	for {
@@ -20873,7 +20873,7 @@
 			if v_1.Op != OpARM64CSEL0 || v_1.Type != typ.UInt32 {
 				continue
 			}
-			cc := auxToCCop(v_1.Aux)
+			cc := auxIntToOp(v_1.AuxInt)
 			_ = v_1.Args[1]
 			v_1_0 := v_1.Args[0]
 			if v_1_0.Op != OpARM64SRL || v_1_0.Type != typ.UInt32 {
@@ -20922,7 +20922,7 @@
 		}
 		break
 	}
-	// match: (XOR (SRL <typ.UInt32> (MOVWUreg x) (ANDconst <t> [31] y)) (CSEL0 <typ.UInt32> {cc} (SLL x (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y))) (CMPconst [64] (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))))
+	// match: (XOR (SRL <typ.UInt32> (MOVWUreg x) (ANDconst <t> [31] y)) (CSEL0 <typ.UInt32> [cc] (SLL x (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y))) (CMPconst [64] (SUB <t> (MOVDconst [32]) (ANDconst <t> [31] y)))))
 	// cond: cc == OpARM64LessThanU
 	// result: (RORW x y)
 	for {
@@ -20948,7 +20948,7 @@
 			if v_1.Op != OpARM64CSEL0 || v_1.Type != typ.UInt32 {
 				continue
 			}
-			cc := auxToCCop(v_1.Aux)
+			cc := auxIntToOp(v_1.AuxInt)
 			_ = v_1.Args[1]
 			v_1_0 := v_1.Args[0]
 			if v_1_0.Op != OpARM64SLL {
@@ -21471,7 +21471,7 @@
 	b := v.Block
 	// match: (CondSelect x y boolval)
 	// cond: flagArg(boolval) != nil
-	// result: (CSEL {boolval.Op} x y flagArg(boolval))
+	// result: (CSEL [boolval.Op] x y flagArg(boolval))
 	for {
 		x := v_0
 		y := v_1
@@ -21480,13 +21480,13 @@
 			break
 		}
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(boolval.Op)
+		v.AuxInt = opToAuxInt(boolval.Op)
 		v.AddArg3(x, y, flagArg(boolval))
 		return true
 	}
 	// match: (CondSelect x y boolval)
 	// cond: flagArg(boolval) == nil
-	// result: (CSEL {OpARM64NotEqual} x y (CMPWconst [0] boolval))
+	// result: (CSEL [OpARM64NotEqual] x y (CMPWconst [0] boolval))
 	for {
 		x := v_0
 		y := v_1
@@ -21495,7 +21495,7 @@
 			break
 		}
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64NotEqual)
+		v.AuxInt = opToAuxInt(OpARM64NotEqual)
 		v0 := b.NewValue0(v.Pos, OpARM64CMPWconst, types.TypeFlags)
 		v0.AuxInt = int32ToAuxInt(0)
 		v0.AddArg(boolval)
@@ -22734,13 +22734,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Lsh16x16 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt16to64, typ.UInt64)
 		v1.AddArg(y)
@@ -22760,13 +22760,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Lsh16x32 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt32to64, typ.UInt64)
 		v1.AddArg(y)
@@ -22785,13 +22785,13 @@
 	v_0 := v.Args[0]
 	b := v.Block
 	// match: (Lsh16x64 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v0.AddArg2(x, y)
 		v1 := b.NewValue0(v.Pos, OpConst64, t)
@@ -22809,13 +22809,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Lsh16x8 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt8to64, typ.UInt64)
 		v1.AddArg(y)
@@ -22835,13 +22835,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Lsh32x16 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt16to64, typ.UInt64)
 		v1.AddArg(y)
@@ -22861,13 +22861,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Lsh32x32 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt32to64, typ.UInt64)
 		v1.AddArg(y)
@@ -22886,13 +22886,13 @@
 	v_0 := v.Args[0]
 	b := v.Block
 	// match: (Lsh32x64 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v0.AddArg2(x, y)
 		v1 := b.NewValue0(v.Pos, OpConst64, t)
@@ -22910,13 +22910,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Lsh32x8 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt8to64, typ.UInt64)
 		v1.AddArg(y)
@@ -22936,13 +22936,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Lsh64x16 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt16to64, typ.UInt64)
 		v1.AddArg(y)
@@ -22962,13 +22962,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Lsh64x32 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt32to64, typ.UInt64)
 		v1.AddArg(y)
@@ -22987,13 +22987,13 @@
 	v_0 := v.Args[0]
 	b := v.Block
 	// match: (Lsh64x64 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v0.AddArg2(x, y)
 		v1 := b.NewValue0(v.Pos, OpConst64, t)
@@ -23011,13 +23011,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Lsh64x8 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt8to64, typ.UInt64)
 		v1.AddArg(y)
@@ -23037,13 +23037,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Lsh8x16 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt16to64, typ.UInt64)
 		v1.AddArg(y)
@@ -23063,13 +23063,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Lsh8x32 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt32to64, typ.UInt64)
 		v1.AddArg(y)
@@ -23088,13 +23088,13 @@
 	v_0 := v.Args[0]
 	b := v.Block
 	// match: (Lsh8x64 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v0.AddArg2(x, y)
 		v1 := b.NewValue0(v.Pos, OpConst64, t)
@@ -23112,13 +23112,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Lsh8x8 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SLL <t> x (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SLL <t> x (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SLL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt8to64, typ.UInt64)
 		v1.AddArg(y)
@@ -23932,13 +23932,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh16Ux16 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt16to64 x) (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt16to64 x) (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt16to64, typ.UInt64)
 		v1.AddArg(x)
@@ -23960,13 +23960,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh16Ux32 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt16to64 x) (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt16to64 x) (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt16to64, typ.UInt64)
 		v1.AddArg(x)
@@ -23988,13 +23988,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh16Ux64 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt16to64 x) y) (Const64 <t> [0]) (CMPconst [64] y))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt16to64 x) y) (Const64 <t> [0]) (CMPconst [64] y))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt16to64, typ.UInt64)
 		v1.AddArg(x)
@@ -24014,13 +24014,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh16Ux8 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt16to64 x) (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt16to64 x) (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt16to64, typ.UInt64)
 		v1.AddArg(x)
@@ -24042,7 +24042,7 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh16x16 x y)
-	// result: (SRA (SignExt16to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
+	// result: (SRA (SignExt16to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
 	for {
 		x := v_0
 		y := v_1
@@ -24050,7 +24050,7 @@
 		v0 := b.NewValue0(v.Pos, OpSignExt16to64, typ.Int64)
 		v0.AddArg(x)
 		v1 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v1.Aux = cCopToAux(OpARM64LessThanU)
+		v1.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v2 := b.NewValue0(v.Pos, OpZeroExt16to64, typ.UInt64)
 		v2.AddArg(y)
 		v3 := b.NewValue0(v.Pos, OpConst64, y.Type)
@@ -24069,7 +24069,7 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh16x32 x y)
-	// result: (SRA (SignExt16to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
+	// result: (SRA (SignExt16to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
 	for {
 		x := v_0
 		y := v_1
@@ -24077,7 +24077,7 @@
 		v0 := b.NewValue0(v.Pos, OpSignExt16to64, typ.Int64)
 		v0.AddArg(x)
 		v1 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v1.Aux = cCopToAux(OpARM64LessThanU)
+		v1.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v2 := b.NewValue0(v.Pos, OpZeroExt32to64, typ.UInt64)
 		v2.AddArg(y)
 		v3 := b.NewValue0(v.Pos, OpConst64, y.Type)
@@ -24096,7 +24096,7 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh16x64 x y)
-	// result: (SRA (SignExt16to64 x) (CSEL {OpARM64LessThanU} <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
+	// result: (SRA (SignExt16to64 x) (CSEL [OpARM64LessThanU] <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
 	for {
 		x := v_0
 		y := v_1
@@ -24104,7 +24104,7 @@
 		v0 := b.NewValue0(v.Pos, OpSignExt16to64, typ.Int64)
 		v0.AddArg(x)
 		v1 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v1.Aux = cCopToAux(OpARM64LessThanU)
+		v1.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v2 := b.NewValue0(v.Pos, OpConst64, y.Type)
 		v2.AuxInt = int64ToAuxInt(63)
 		v3 := b.NewValue0(v.Pos, OpARM64CMPconst, types.TypeFlags)
@@ -24121,7 +24121,7 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh16x8 x y)
-	// result: (SRA (SignExt16to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt8to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64 y))))
+	// result: (SRA (SignExt16to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt8to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64 y))))
 	for {
 		x := v_0
 		y := v_1
@@ -24129,7 +24129,7 @@
 		v0 := b.NewValue0(v.Pos, OpSignExt16to64, typ.Int64)
 		v0.AddArg(x)
 		v1 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v1.Aux = cCopToAux(OpARM64LessThanU)
+		v1.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v2 := b.NewValue0(v.Pos, OpZeroExt8to64, typ.UInt64)
 		v2.AddArg(y)
 		v3 := b.NewValue0(v.Pos, OpConst64, y.Type)
@@ -24148,13 +24148,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh32Ux16 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt32to64 x) (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt32to64 x) (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt32to64, typ.UInt64)
 		v1.AddArg(x)
@@ -24176,13 +24176,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh32Ux32 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt32to64 x) (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt32to64 x) (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt32to64, typ.UInt64)
 		v1.AddArg(x)
@@ -24204,13 +24204,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh32Ux64 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt32to64 x) y) (Const64 <t> [0]) (CMPconst [64] y))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt32to64 x) y) (Const64 <t> [0]) (CMPconst [64] y))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt32to64, typ.UInt64)
 		v1.AddArg(x)
@@ -24230,13 +24230,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh32Ux8 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt32to64 x) (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt32to64 x) (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt32to64, typ.UInt64)
 		v1.AddArg(x)
@@ -24258,7 +24258,7 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh32x16 x y)
-	// result: (SRA (SignExt32to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
+	// result: (SRA (SignExt32to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
 	for {
 		x := v_0
 		y := v_1
@@ -24266,7 +24266,7 @@
 		v0 := b.NewValue0(v.Pos, OpSignExt32to64, typ.Int64)
 		v0.AddArg(x)
 		v1 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v1.Aux = cCopToAux(OpARM64LessThanU)
+		v1.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v2 := b.NewValue0(v.Pos, OpZeroExt16to64, typ.UInt64)
 		v2.AddArg(y)
 		v3 := b.NewValue0(v.Pos, OpConst64, y.Type)
@@ -24285,7 +24285,7 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh32x32 x y)
-	// result: (SRA (SignExt32to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
+	// result: (SRA (SignExt32to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
 	for {
 		x := v_0
 		y := v_1
@@ -24293,7 +24293,7 @@
 		v0 := b.NewValue0(v.Pos, OpSignExt32to64, typ.Int64)
 		v0.AddArg(x)
 		v1 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v1.Aux = cCopToAux(OpARM64LessThanU)
+		v1.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v2 := b.NewValue0(v.Pos, OpZeroExt32to64, typ.UInt64)
 		v2.AddArg(y)
 		v3 := b.NewValue0(v.Pos, OpConst64, y.Type)
@@ -24312,7 +24312,7 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh32x64 x y)
-	// result: (SRA (SignExt32to64 x) (CSEL {OpARM64LessThanU} <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
+	// result: (SRA (SignExt32to64 x) (CSEL [OpARM64LessThanU] <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
 	for {
 		x := v_0
 		y := v_1
@@ -24320,7 +24320,7 @@
 		v0 := b.NewValue0(v.Pos, OpSignExt32to64, typ.Int64)
 		v0.AddArg(x)
 		v1 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v1.Aux = cCopToAux(OpARM64LessThanU)
+		v1.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v2 := b.NewValue0(v.Pos, OpConst64, y.Type)
 		v2.AuxInt = int64ToAuxInt(63)
 		v3 := b.NewValue0(v.Pos, OpARM64CMPconst, types.TypeFlags)
@@ -24337,7 +24337,7 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh32x8 x y)
-	// result: (SRA (SignExt32to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt8to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64 y))))
+	// result: (SRA (SignExt32to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt8to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64 y))))
 	for {
 		x := v_0
 		y := v_1
@@ -24345,7 +24345,7 @@
 		v0 := b.NewValue0(v.Pos, OpSignExt32to64, typ.Int64)
 		v0.AddArg(x)
 		v1 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v1.Aux = cCopToAux(OpARM64LessThanU)
+		v1.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v2 := b.NewValue0(v.Pos, OpZeroExt8to64, typ.UInt64)
 		v2.AddArg(y)
 		v3 := b.NewValue0(v.Pos, OpConst64, y.Type)
@@ -24364,13 +24364,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh64Ux16 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> x (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt16to64, typ.UInt64)
 		v1.AddArg(y)
@@ -24390,13 +24390,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh64Ux32 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> x (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt32to64, typ.UInt64)
 		v1.AddArg(y)
@@ -24415,13 +24415,13 @@
 	v_0 := v.Args[0]
 	b := v.Block
 	// match: (Rsh64Ux64 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> x y) (Const64 <t> [0]) (CMPconst [64] y))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v0.AddArg2(x, y)
 		v1 := b.NewValue0(v.Pos, OpConst64, t)
@@ -24439,13 +24439,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh64Ux8 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> x (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> x (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt8to64, typ.UInt64)
 		v1.AddArg(y)
@@ -24465,13 +24465,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh64x16 x y)
-	// result: (SRA x (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
+	// result: (SRA x (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
 	for {
 		x := v_0
 		y := v_1
 		v.reset(OpARM64SRA)
 		v0 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v0.Aux = cCopToAux(OpARM64LessThanU)
+		v0.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v1 := b.NewValue0(v.Pos, OpZeroExt16to64, typ.UInt64)
 		v1.AddArg(y)
 		v2 := b.NewValue0(v.Pos, OpConst64, y.Type)
@@ -24490,13 +24490,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh64x32 x y)
-	// result: (SRA x (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
+	// result: (SRA x (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
 	for {
 		x := v_0
 		y := v_1
 		v.reset(OpARM64SRA)
 		v0 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v0.Aux = cCopToAux(OpARM64LessThanU)
+		v0.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v1 := b.NewValue0(v.Pos, OpZeroExt32to64, typ.UInt64)
 		v1.AddArg(y)
 		v2 := b.NewValue0(v.Pos, OpConst64, y.Type)
@@ -24514,13 +24514,13 @@
 	v_0 := v.Args[0]
 	b := v.Block
 	// match: (Rsh64x64 x y)
-	// result: (SRA x (CSEL {OpARM64LessThanU} <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
+	// result: (SRA x (CSEL [OpARM64LessThanU] <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
 	for {
 		x := v_0
 		y := v_1
 		v.reset(OpARM64SRA)
 		v0 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v0.Aux = cCopToAux(OpARM64LessThanU)
+		v0.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v1 := b.NewValue0(v.Pos, OpConst64, y.Type)
 		v1.AuxInt = int64ToAuxInt(63)
 		v2 := b.NewValue0(v.Pos, OpARM64CMPconst, types.TypeFlags)
@@ -24537,13 +24537,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh64x8 x y)
-	// result: (SRA x (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt8to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64 y))))
+	// result: (SRA x (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt8to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64 y))))
 	for {
 		x := v_0
 		y := v_1
 		v.reset(OpARM64SRA)
 		v0 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v0.Aux = cCopToAux(OpARM64LessThanU)
+		v0.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v1 := b.NewValue0(v.Pos, OpZeroExt8to64, typ.UInt64)
 		v1.AddArg(y)
 		v2 := b.NewValue0(v.Pos, OpConst64, y.Type)
@@ -24562,13 +24562,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh8Ux16 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt8to64 x) (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt8to64 x) (ZeroExt16to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt16to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt8to64, typ.UInt64)
 		v1.AddArg(x)
@@ -24590,13 +24590,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh8Ux32 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt8to64 x) (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt8to64 x) (ZeroExt32to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt32to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt8to64, typ.UInt64)
 		v1.AddArg(x)
@@ -24618,13 +24618,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh8Ux64 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt8to64 x) y) (Const64 <t> [0]) (CMPconst [64] y))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt8to64 x) y) (Const64 <t> [0]) (CMPconst [64] y))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt8to64, typ.UInt64)
 		v1.AddArg(x)
@@ -24644,13 +24644,13 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh8Ux8 <t> x y)
-	// result: (CSEL {OpARM64LessThanU} (SRL <t> (ZeroExt8to64 x) (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
+	// result: (CSEL [OpARM64LessThanU] (SRL <t> (ZeroExt8to64 x) (ZeroExt8to64 y)) (Const64 <t> [0]) (CMPconst [64] (ZeroExt8to64 y)))
 	for {
 		t := v.Type
 		x := v_0
 		y := v_1
 		v.reset(OpARM64CSEL)
-		v.Aux = cCopToAux(OpARM64LessThanU)
+		v.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v0 := b.NewValue0(v.Pos, OpARM64SRL, t)
 		v1 := b.NewValue0(v.Pos, OpZeroExt8to64, typ.UInt64)
 		v1.AddArg(x)
@@ -24672,7 +24672,7 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh8x16 x y)
-	// result: (SRA (SignExt8to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
+	// result: (SRA (SignExt8to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt16to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt16to64 y))))
 	for {
 		x := v_0
 		y := v_1
@@ -24680,7 +24680,7 @@
 		v0 := b.NewValue0(v.Pos, OpSignExt8to64, typ.Int64)
 		v0.AddArg(x)
 		v1 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v1.Aux = cCopToAux(OpARM64LessThanU)
+		v1.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v2 := b.NewValue0(v.Pos, OpZeroExt16to64, typ.UInt64)
 		v2.AddArg(y)
 		v3 := b.NewValue0(v.Pos, OpConst64, y.Type)
@@ -24699,7 +24699,7 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh8x32 x y)
-	// result: (SRA (SignExt8to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
+	// result: (SRA (SignExt8to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt32to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt32to64 y))))
 	for {
 		x := v_0
 		y := v_1
@@ -24707,7 +24707,7 @@
 		v0 := b.NewValue0(v.Pos, OpSignExt8to64, typ.Int64)
 		v0.AddArg(x)
 		v1 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v1.Aux = cCopToAux(OpARM64LessThanU)
+		v1.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v2 := b.NewValue0(v.Pos, OpZeroExt32to64, typ.UInt64)
 		v2.AddArg(y)
 		v3 := b.NewValue0(v.Pos, OpConst64, y.Type)
@@ -24726,7 +24726,7 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh8x64 x y)
-	// result: (SRA (SignExt8to64 x) (CSEL {OpARM64LessThanU} <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
+	// result: (SRA (SignExt8to64 x) (CSEL [OpARM64LessThanU] <y.Type> y (Const64 <y.Type> [63]) (CMPconst [64] y)))
 	for {
 		x := v_0
 		y := v_1
@@ -24734,7 +24734,7 @@
 		v0 := b.NewValue0(v.Pos, OpSignExt8to64, typ.Int64)
 		v0.AddArg(x)
 		v1 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v1.Aux = cCopToAux(OpARM64LessThanU)
+		v1.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v2 := b.NewValue0(v.Pos, OpConst64, y.Type)
 		v2.AuxInt = int64ToAuxInt(63)
 		v3 := b.NewValue0(v.Pos, OpARM64CMPconst, types.TypeFlags)
@@ -24751,7 +24751,7 @@
 	b := v.Block
 	typ := &b.Func.Config.Types
 	// match: (Rsh8x8 x y)
-	// result: (SRA (SignExt8to64 x) (CSEL {OpARM64LessThanU} <y.Type> (ZeroExt8to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64 y))))
+	// result: (SRA (SignExt8to64 x) (CSEL [OpARM64LessThanU] <y.Type> (ZeroExt8to64 y) (Const64 <y.Type> [63]) (CMPconst [64] (ZeroExt8to64 y))))
 	for {
 		x := v_0
 		y := v_1
@@ -24759,7 +24759,7 @@
 		v0 := b.NewValue0(v.Pos, OpSignExt8to64, typ.Int64)
 		v0.AddArg(x)
 		v1 := b.NewValue0(v.Pos, OpARM64CSEL, y.Type)
-		v1.Aux = cCopToAux(OpARM64LessThanU)
+		v1.AuxInt = opToAuxInt(OpARM64LessThanU)
 		v2 := b.NewValue0(v.Pos, OpZeroExt8to64, typ.UInt64)
 		v2.AddArg(y)
 		v3 := b.NewValue0(v.Pos, OpConst64, y.Type)
diff --git a/src/cmd/compile/internal/ssa/value.go b/src/cmd/compile/internal/ssa/value.go
index 7fc3377..090745d 100644
--- a/src/cmd/compile/internal/ssa/value.go
+++ b/src/cmd/compile/internal/ssa/value.go
@@ -210,7 +210,7 @@
 		}
 		return s + fmt.Sprintf(" [%s]", v.AuxValAndOff())
 	case auxCCop:
-		return fmt.Sprintf(" {%s}", v.Aux.(Op))
+		return fmt.Sprintf(" {%s}", Op(v.AuxInt))
 	case auxS390XCCMask, auxS390XRotateParams:
 		return fmt.Sprintf(" {%v}", v.Aux)
 	case auxFlagConstant: