cmd/compile: use | in the most repetitive boolean rules

For now, limited to a few repetitive boolean rules where the win is
substantial (4+ variants).

Change-Id: I67bce0d356ca7d71a0f15ff98551fe2caff8abf9
Reviewed-on: https://go-review.googlesource.com/95535
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/cmd/compile/internal/ssa/gen/generic.rules

@@ -239,18 +239,12 @@
 (IsSliceInBounds (Const64 [c]) (Const64 [d])) -> (ConstBool [b2i(0 <= c && c <= d)])
 (IsSliceInBounds (SliceLen x) (SliceCap x)) -> (ConstBool [1])
 
-(Eq64 x x) -> (ConstBool [1])
-(Eq32 x x) -> (ConstBool [1])
-(Eq16 x x) -> (ConstBool [1])
-(Eq8  x x) -> (ConstBool [1])
+(Eq(64|32|16|8) x x) -> (ConstBool [1])
 (EqB (ConstBool [c]) (ConstBool [d])) -> (ConstBool [b2i(c == d)])
 (EqB (ConstBool [0]) x) -> (Not x)
 (EqB (ConstBool [1]) x) -> x
 
-(Neq64 x x) -> (ConstBool [0])
-(Neq32 x x) -> (ConstBool [0])
-(Neq16 x x) -> (ConstBool [0])
-(Neq8  x x) -> (ConstBool [0])
+(Neq(64|32|16|8) x x) -> (ConstBool [0])
 (NeqB (ConstBool [c]) (ConstBool [d])) -> (ConstBool [b2i(c != d)])
 (NeqB (ConstBool [0]) x) -> x
 (NeqB (ConstBool [1]) x) -> (Not x)
@@ -273,57 +267,19 @@
 (Sub8  x (Const8  <t> [c])) && x.Op != OpConst8  -> (Add8  (Const8  <t> [int64(int8(-c))]) x)
 
 // fold negation into comparison operators
-(Not (Eq64 x y)) -> (Neq64 x y)
-(Not (Eq32 x y)) -> (Neq32 x y)
-(Not (Eq16 x y)) -> (Neq16 x y)
-(Not (Eq8  x y)) -> (Neq8  x y)
-(Not (EqB  x y)) -> (NeqB  x y)
-
-(Not (Neq64 x y)) -> (Eq64 x y)
-(Not (Neq32 x y)) -> (Eq32 x y)
-(Not (Neq16 x y)) -> (Eq16 x y)
-(Not (Neq8  x y)) -> (Eq8  x y)
-(Not (NeqB  x y)) -> (EqB  x y)
-
-(Not (Greater64 x y)) -> (Leq64 x y)
-(Not (Greater32 x y)) -> (Leq32 x y)
-(Not (Greater16 x y)) -> (Leq16 x y)
-(Not (Greater8  x y)) -> (Leq8  x y)
-
-(Not (Greater64U x y)) -> (Leq64U x y)
-(Not (Greater32U x y)) -> (Leq32U x y)
-(Not (Greater16U x y)) -> (Leq16U x y)
-(Not (Greater8U  x y)) -> (Leq8U  x y)
-
-(Not (Geq64 x y)) -> (Less64 x y)
-(Not (Geq32 x y)) -> (Less32 x y)
-(Not (Geq16 x y)) -> (Less16 x y)
-(Not (Geq8  x y)) -> (Less8  x y)
-
-(Not (Geq64U x y)) -> (Less64U x y)
-(Not (Geq32U x y)) -> (Less32U x y)
-(Not (Geq16U x y)) -> (Less16U x y)
-(Not (Geq8U  x y)) -> (Less8U  x y)
-
-(Not (Less64 x y)) -> (Geq64 x y)
-(Not (Less32 x y)) -> (Geq32 x y)
-(Not (Less16 x y)) -> (Geq16 x y)
-(Not (Less8  x y)) -> (Geq8  x y)
-
-(Not (Less64U x y)) -> (Geq64U x y)
-(Not (Less32U x y)) -> (Geq32U x y)
-(Not (Less16U x y)) -> (Geq16U x y)
-(Not (Less8U  x y)) -> (Geq8U  x y)
-
-(Not (Leq64 x y)) -> (Greater64 x y)
-(Not (Leq32 x y)) -> (Greater32 x y)
-(Not (Leq16 x y)) -> (Greater16 x y)
-(Not (Leq8  x y)) -> (Greater8 x y)
-
-(Not (Leq64U x y)) -> (Greater64U x y)
-(Not (Leq32U x y)) -> (Greater32U x y)
-(Not (Leq16U x y)) -> (Greater16U x y)
-(Not (Leq8U  x y)) -> (Greater8U  x y)
+(Not (Eq(64|32|16|8|B) x y)) -> (Neq(64|32|16|8|B) x y)
+(Not (Neq(64|32|16|8|B) x y)) -> (Eq(64|32|16|8|B) x y)
+
+(Not (Greater(64|32|16|8) x y)) -> (Leq(64|32|16|8) x y)
+(Not (Greater(64|32|16|8)U x y)) -> (Leq(64|32|16|8)U x y)
+(Not (Geq(64|32|16|8) x y)) -> (Less(64|32|16|8) x y)
+(Not (Geq(64|32|16|8)U x y)) -> (Less(64|32|16|8)U x y)
+
+(Not (Less(64|32|16|8) x y)) -> (Geq(64|32|16|8) x y)
+(Not (Less(64|32|16|8)U x y)) -> (Geq(64|32|16|8)U x y)
+(Not (Leq(64|32|16|8) x y)) -> (Greater(64|32|16|8) x y)
+(Not (Leq(64|32|16|8)U x y)) -> (Greater(64|32|16|8)U x y)
+
 
 // Distribute multiplication c * (d+x) -> c*d + c*x. Useful for:
 // a[i].b = ...; a[i+1].b = ...