diff options
Diffstat (limited to 'src/cmd/compile/internal/ssa/gen/ARM.rules')
| -rw-r--r-- | src/cmd/compile/internal/ssa/gen/ARM.rules | 1482 |
1 files changed, 1482 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/ssa/gen/ARM.rules b/src/cmd/compile/internal/ssa/gen/ARM.rules new file mode 100644 index 0000000..23f1132 --- /dev/null +++ b/src/cmd/compile/internal/ssa/gen/ARM.rules @@ -0,0 +1,1482 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +(Add(Ptr|32|16|8) ...) => (ADD ...) +(Add(32|64)F ...) => (ADD(F|D) ...) +(Add32carry ...) => (ADDS ...) +(Add32withcarry ...) => (ADC ...) + +(Sub(Ptr|32|16|8) ...) => (SUB ...) +(Sub(32|64)F ...) => (SUB(F|D) ...) +(Sub32carry ...) => (SUBS ...) +(Sub32withcarry ...) => (SBC ...) + +(Mul(32|16|8) ...) => (MUL ...) +(Mul(32|64)F ...) => (MUL(F|D) ...) +(Hmul(32|32u) ...) => (HMU(L|LU) ...) +(Mul32uhilo ...) => (MULLU ...) + +(Div32 x y) => + (SUB (XOR <typ.UInt32> // negate the result if one operand is negative + (Select0 <typ.UInt32> (CALLudiv + (SUB <typ.UInt32> (XOR x <typ.UInt32> (Signmask x)) (Signmask x)) // negate x if negative + (SUB <typ.UInt32> (XOR y <typ.UInt32> (Signmask y)) (Signmask y)))) // negate y if negative + (Signmask (XOR <typ.UInt32> x y))) (Signmask (XOR <typ.UInt32> x y))) +(Div32u x y) => (Select0 <typ.UInt32> (CALLudiv x y)) +(Div16 x y) => (Div32 (SignExt16to32 x) (SignExt16to32 y)) +(Div16u x y) => (Div32u (ZeroExt16to32 x) (ZeroExt16to32 y)) +(Div8 x y) => (Div32 (SignExt8to32 x) (SignExt8to32 y)) +(Div8u x y) => (Div32u (ZeroExt8to32 x) (ZeroExt8to32 y)) +(Div(32|64)F ...) => (DIV(F|D) ...) + +(Mod32 x y) => + (SUB (XOR <typ.UInt32> // negate the result if x is negative + (Select1 <typ.UInt32> (CALLudiv + (SUB <typ.UInt32> (XOR <typ.UInt32> x (Signmask x)) (Signmask x)) // negate x if negative + (SUB <typ.UInt32> (XOR <typ.UInt32> y (Signmask y)) (Signmask y)))) // negate y if negative + (Signmask x)) (Signmask x)) +(Mod32u x y) => (Select1 <typ.UInt32> (CALLudiv x y)) +(Mod16 x y) => (Mod32 (SignExt16to32 x) (SignExt16to32 y)) +(Mod16u x y) => (Mod32u (ZeroExt16to32 x) (ZeroExt16to32 y)) +(Mod8 x y) => (Mod32 (SignExt8to32 x) (SignExt8to32 y)) +(Mod8u x y) => (Mod32u (ZeroExt8to32 x) (ZeroExt8to32 y)) + +// (x + y) / 2 with x>=y -> (x - y) / 2 + y +(Avg32u <t> x y) => (ADD (SRLconst <t> (SUB <t> x y) [1]) y) + +(And(32|16|8) ...) => (AND ...) +(Or(32|16|8) ...) => (OR ...) +(Xor(32|16|8) ...) => (XOR ...) + +// unary ops +(Neg(32|16|8) x) => (RSBconst [0] x) +(Neg(32|64)F ...) => (NEG(F|D) ...) + +(Com(32|16|8) ...) => (MVN ...) + +(Sqrt ...) => (SQRTD ...) +(Sqrt32 ...) => (SQRTF ...) +(Abs ...) => (ABSD ...) + +// TODO: optimize this for ARMv5 and ARMv6 +(Ctz32NonZero ...) => (Ctz32 ...) +(Ctz16NonZero ...) => (Ctz32 ...) +(Ctz8NonZero ...) => (Ctz32 ...) + +// count trailing zero for ARMv5 and ARMv6 +// 32 - CLZ(x&-x - 1) +(Ctz32 <t> x) && buildcfg.GOARM<=6 => + (RSBconst [32] (CLZ <t> (SUBconst <t> (AND <t> x (RSBconst <t> [0] x)) [1]))) +(Ctz16 <t> x) && buildcfg.GOARM<=6 => + (RSBconst [32] (CLZ <t> (SUBconst <typ.UInt32> (AND <typ.UInt32> (ORconst <typ.UInt32> [0x10000] x) (RSBconst <typ.UInt32> [0] (ORconst <typ.UInt32> [0x10000] x))) [1]))) +(Ctz8 <t> x) && buildcfg.GOARM<=6 => + (RSBconst [32] (CLZ <t> (SUBconst <typ.UInt32> (AND <typ.UInt32> (ORconst <typ.UInt32> [0x100] x) (RSBconst <typ.UInt32> [0] (ORconst <typ.UInt32> [0x100] x))) [1]))) + +// count trailing zero for ARMv7 +(Ctz32 <t> x) && buildcfg.GOARM==7 => (CLZ <t> (RBIT <t> x)) +(Ctz16 <t> x) && buildcfg.GOARM==7 => (CLZ <t> (RBIT <typ.UInt32> (ORconst <typ.UInt32> [0x10000] x))) +(Ctz8 <t> x) && buildcfg.GOARM==7 => (CLZ <t> (RBIT <typ.UInt32> (ORconst <typ.UInt32> [0x100] x))) + +// bit length +(BitLen32 <t> x) => (RSBconst [32] (CLZ <t> x)) + +// byte swap for ARMv5 +// let (a, b, c, d) be the bytes of x from high to low +// t1 = x right rotate 16 bits -- (c, d, a, b ) +// t2 = x ^ t1 -- (a^c, b^d, a^c, b^d) +// t3 = t2 &^ 0xff0000 -- (a^c, 0, a^c, b^d) +// t4 = t3 >> 8 -- (0, a^c, 0, a^c) +// t5 = x right rotate 8 bits -- (d, a, b, c ) +// result = t4 ^ t5 -- (d, c, b, a ) +// using shifted ops this can be done in 4 instructions. +(Bswap32 <t> x) && buildcfg.GOARM==5 => + (XOR <t> + (SRLconst <t> (BICconst <t> (XOR <t> x (SRRconst <t> [16] x)) [0xff0000]) [8]) + (SRRconst <t> x [8])) + +// byte swap for ARMv6 and above +(Bswap32 x) && buildcfg.GOARM>=6 => (REV x) + +// boolean ops -- booleans are represented with 0=false, 1=true +(AndB ...) => (AND ...) +(OrB ...) => (OR ...) +(EqB x y) => (XORconst [1] (XOR <typ.Bool> x y)) +(NeqB ...) => (XOR ...) +(Not x) => (XORconst [1] x) + +// shifts +// hardware instruction uses only the low byte of the shift +// we compare to 256 to ensure Go semantics for large shifts +(Lsh32x32 x y) => (CMOVWHSconst (SLL <x.Type> x y) (CMPconst [256] y) [0]) +(Lsh32x16 x y) => (CMOVWHSconst (SLL <x.Type> x (ZeroExt16to32 y)) (CMPconst [256] (ZeroExt16to32 y)) [0]) +(Lsh32x8 x y) => (SLL x (ZeroExt8to32 y)) + +(Lsh16x32 x y) => (CMOVWHSconst (SLL <x.Type> x y) (CMPconst [256] y) [0]) +(Lsh16x16 x y) => (CMOVWHSconst (SLL <x.Type> x (ZeroExt16to32 y)) (CMPconst [256] (ZeroExt16to32 y)) [0]) +(Lsh16x8 x y) => (SLL x (ZeroExt8to32 y)) + +(Lsh8x32 x y) => (CMOVWHSconst (SLL <x.Type> x y) (CMPconst [256] y) [0]) +(Lsh8x16 x y) => (CMOVWHSconst (SLL <x.Type> x (ZeroExt16to32 y)) (CMPconst [256] (ZeroExt16to32 y)) [0]) +(Lsh8x8 x y) => (SLL x (ZeroExt8to32 y)) + +(Rsh32Ux32 x y) => (CMOVWHSconst (SRL <x.Type> x y) (CMPconst [256] y) [0]) +(Rsh32Ux16 x y) => (CMOVWHSconst (SRL <x.Type> x (ZeroExt16to32 y)) (CMPconst [256] (ZeroExt16to32 y)) [0]) +(Rsh32Ux8 x y) => (SRL x (ZeroExt8to32 y)) + +(Rsh16Ux32 x y) => (CMOVWHSconst (SRL <x.Type> (ZeroExt16to32 x) y) (CMPconst [256] y) [0]) +(Rsh16Ux16 x y) => (CMOVWHSconst (SRL <x.Type> (ZeroExt16to32 x) (ZeroExt16to32 y)) (CMPconst [256] (ZeroExt16to32 y)) [0]) +(Rsh16Ux8 x y) => (SRL (ZeroExt16to32 x) (ZeroExt8to32 y)) + +(Rsh8Ux32 x y) => (CMOVWHSconst (SRL <x.Type> (ZeroExt8to32 x) y) (CMPconst [256] y) [0]) +(Rsh8Ux16 x y) => (CMOVWHSconst (SRL <x.Type> (ZeroExt8to32 x) (ZeroExt16to32 y)) (CMPconst [256] (ZeroExt16to32 y)) [0]) +(Rsh8Ux8 x y) => (SRL (ZeroExt8to32 x) (ZeroExt8to32 y)) + +(Rsh32x32 x y) => (SRAcond x y (CMPconst [256] y)) +(Rsh32x16 x y) => (SRAcond x (ZeroExt16to32 y) (CMPconst [256] (ZeroExt16to32 y))) +(Rsh32x8 x y) => (SRA x (ZeroExt8to32 y)) + +(Rsh16x32 x y) => (SRAcond (SignExt16to32 x) y (CMPconst [256] y)) +(Rsh16x16 x y) => (SRAcond (SignExt16to32 x) (ZeroExt16to32 y) (CMPconst [256] (ZeroExt16to32 y))) +(Rsh16x8 x y) => (SRA (SignExt16to32 x) (ZeroExt8to32 y)) + +(Rsh8x32 x y) => (SRAcond (SignExt8to32 x) y (CMPconst [256] y)) +(Rsh8x16 x y) => (SRAcond (SignExt8to32 x) (ZeroExt16to32 y) (CMPconst [256] (ZeroExt16to32 y))) +(Rsh8x8 x y) => (SRA (SignExt8to32 x) (ZeroExt8to32 y)) + +// constant shifts +// generic opt rewrites all constant shifts to shift by Const64 +(Lsh32x64 x (Const64 [c])) && uint64(c) < 32 => (SLLconst x [int32(c)]) +(Rsh32x64 x (Const64 [c])) && uint64(c) < 32 => (SRAconst x [int32(c)]) +(Rsh32Ux64 x (Const64 [c])) && uint64(c) < 32 => (SRLconst x [int32(c)]) +(Lsh16x64 x (Const64 [c])) && uint64(c) < 16 => (SLLconst x [int32(c)]) +(Rsh16x64 x (Const64 [c])) && uint64(c) < 16 => (SRAconst (SLLconst <typ.UInt32> x [16]) [int32(c+16)]) +(Rsh16Ux64 x (Const64 [c])) && uint64(c) < 16 => (SRLconst (SLLconst <typ.UInt32> x [16]) [int32(c+16)]) +(Lsh8x64 x (Const64 [c])) && uint64(c) < 8 => (SLLconst x [int32(c)]) +(Rsh8x64 x (Const64 [c])) && uint64(c) < 8 => (SRAconst (SLLconst <typ.UInt32> x [24]) [int32(c+24)]) +(Rsh8Ux64 x (Const64 [c])) && uint64(c) < 8 => (SRLconst (SLLconst <typ.UInt32> x [24]) [int32(c+24)]) + +// large constant shifts +(Lsh32x64 _ (Const64 [c])) && uint64(c) >= 32 => (Const32 [0]) +(Rsh32Ux64 _ (Const64 [c])) && uint64(c) >= 32 => (Const32 [0]) +(Lsh16x64 _ (Const64 [c])) && uint64(c) >= 16 => (Const16 [0]) +(Rsh16Ux64 _ (Const64 [c])) && uint64(c) >= 16 => (Const16 [0]) +(Lsh8x64 _ (Const64 [c])) && uint64(c) >= 8 => (Const8 [0]) +(Rsh8Ux64 _ (Const64 [c])) && uint64(c) >= 8 => (Const8 [0]) + +// large constant signed right shift, we leave the sign bit +(Rsh32x64 x (Const64 [c])) && uint64(c) >= 32 => (SRAconst x [31]) +(Rsh16x64 x (Const64 [c])) && uint64(c) >= 16 => (SRAconst (SLLconst <typ.UInt32> x [16]) [31]) +(Rsh8x64 x (Const64 [c])) && uint64(c) >= 8 => (SRAconst (SLLconst <typ.UInt32> x [24]) [31]) + +// constants +(Const(8|16|32) [val]) => (MOVWconst [int32(val)]) +(Const(32|64)F [val]) => (MOV(F|D)const [float64(val)]) +(ConstNil) => (MOVWconst [0]) +(ConstBool [t]) => (MOVWconst [b2i32(t)]) + +// truncations +// Because we ignore high parts of registers, truncates are just copies. +(Trunc16to8 ...) => (Copy ...) +(Trunc32to8 ...) => (Copy ...) +(Trunc32to16 ...) => (Copy ...) + +// Zero-/Sign-extensions +(ZeroExt8to16 ...) => (MOVBUreg ...) +(ZeroExt8to32 ...) => (MOVBUreg ...) +(ZeroExt16to32 ...) => (MOVHUreg ...) + +(SignExt8to16 ...) => (MOVBreg ...) +(SignExt8to32 ...) => (MOVBreg ...) +(SignExt16to32 ...) => (MOVHreg ...) + +(Signmask x) => (SRAconst x [31]) +(Zeromask x) => (SRAconst (RSBshiftRL <typ.Int32> x x [1]) [31]) // sign bit of uint32(x)>>1 - x +(Slicemask <t> x) => (SRAconst (RSBconst <t> [0] x) [31]) + +// float <-> int conversion +(Cvt32to32F ...) => (MOVWF ...) +(Cvt32to64F ...) => (MOVWD ...) +(Cvt32Uto32F ...) => (MOVWUF ...) +(Cvt32Uto64F ...) => (MOVWUD ...) +(Cvt32Fto32 ...) => (MOVFW ...) +(Cvt64Fto32 ...) => (MOVDW ...) +(Cvt32Fto32U ...) => (MOVFWU ...) +(Cvt64Fto32U ...) => (MOVDWU ...) +(Cvt32Fto64F ...) => (MOVFD ...) +(Cvt64Fto32F ...) => (MOVDF ...) + +(Round(32|64)F ...) => (Copy ...) + +(CvtBoolToUint8 ...) => (Copy ...) + +// fused-multiply-add +(FMA x y z) => (FMULAD z x y) + +// comparisons +(Eq8 x y) => (Equal (CMP (ZeroExt8to32 x) (ZeroExt8to32 y))) +(Eq16 x y) => (Equal (CMP (ZeroExt16to32 x) (ZeroExt16to32 y))) +(Eq32 x y) => (Equal (CMP x y)) +(EqPtr x y) => (Equal (CMP x y)) +(Eq(32|64)F x y) => (Equal (CMP(F|D) x y)) + +(Neq8 x y) => (NotEqual (CMP (ZeroExt8to32 x) (ZeroExt8to32 y))) +(Neq16 x y) => (NotEqual (CMP (ZeroExt16to32 x) (ZeroExt16to32 y))) +(Neq32 x y) => (NotEqual (CMP x y)) +(NeqPtr x y) => (NotEqual (CMP x y)) +(Neq(32|64)F x y) => (NotEqual (CMP(F|D) x y)) + +(Less8 x y) => (LessThan (CMP (SignExt8to32 x) (SignExt8to32 y))) +(Less16 x y) => (LessThan (CMP (SignExt16to32 x) (SignExt16to32 y))) +(Less32 x y) => (LessThan (CMP x y)) +(Less(32|64)F x y) => (GreaterThan (CMP(F|D) y x)) // reverse operands to work around NaN + +(Less8U x y) => (LessThanU (CMP (ZeroExt8to32 x) (ZeroExt8to32 y))) +(Less16U x y) => (LessThanU (CMP (ZeroExt16to32 x) (ZeroExt16to32 y))) +(Less32U x y) => (LessThanU (CMP x y)) + +(Leq8 x y) => (LessEqual (CMP (SignExt8to32 x) (SignExt8to32 y))) +(Leq16 x y) => (LessEqual (CMP (SignExt16to32 x) (SignExt16to32 y))) +(Leq32 x y) => (LessEqual (CMP x y)) +(Leq(32|64)F x y) => (GreaterEqual (CMP(F|D) y x)) // reverse operands to work around NaN + +(Leq8U x y) => (LessEqualU (CMP (ZeroExt8to32 x) (ZeroExt8to32 y))) +(Leq16U x y) => (LessEqualU (CMP (ZeroExt16to32 x) (ZeroExt16to32 y))) +(Leq32U x y) => (LessEqualU (CMP x y)) + +(OffPtr [off] ptr:(SP)) => (MOVWaddr [int32(off)] ptr) +(OffPtr [off] ptr) => (ADDconst [int32(off)] ptr) + +(Addr {sym} base) => (MOVWaddr {sym} base) +(LocalAddr {sym} base _) => (MOVWaddr {sym} base) + +// loads +(Load <t> ptr mem) && t.IsBoolean() => (MOVBUload ptr mem) +(Load <t> ptr mem) && (is8BitInt(t) && isSigned(t)) => (MOVBload ptr mem) +(Load <t> ptr mem) && (is8BitInt(t) && !isSigned(t)) => (MOVBUload ptr mem) +(Load <t> ptr mem) && (is16BitInt(t) && isSigned(t)) => (MOVHload ptr mem) +(Load <t> ptr mem) && (is16BitInt(t) && !isSigned(t)) => (MOVHUload ptr mem) +(Load <t> ptr mem) && (is32BitInt(t) || isPtr(t)) => (MOVWload ptr mem) +(Load <t> ptr mem) && is32BitFloat(t) => (MOVFload ptr mem) +(Load <t> ptr mem) && is64BitFloat(t) => (MOVDload ptr mem) + +// stores +(Store {t} ptr val mem) && t.Size() == 1 => (MOVBstore ptr val mem) +(Store {t} ptr val mem) && t.Size() == 2 => (MOVHstore ptr val mem) +(Store {t} ptr val mem) && t.Size() == 4 && !is32BitFloat(val.Type) => (MOVWstore ptr val mem) +(Store {t} ptr val mem) && t.Size() == 4 && is32BitFloat(val.Type) => (MOVFstore ptr val mem) +(Store {t} ptr val mem) && t.Size() == 8 && is64BitFloat(val.Type) => (MOVDstore ptr val mem) + +// zero instructions +(Zero [0] _ mem) => mem +(Zero [1] ptr mem) => (MOVBstore ptr (MOVWconst [0]) mem) +(Zero [2] {t} ptr mem) && t.Alignment()%2 == 0 => + (MOVHstore ptr (MOVWconst [0]) mem) +(Zero [2] ptr mem) => + (MOVBstore [1] ptr (MOVWconst [0]) + (MOVBstore [0] ptr (MOVWconst [0]) mem)) +(Zero [4] {t} ptr mem) && t.Alignment()%4 == 0 => + (MOVWstore ptr (MOVWconst [0]) mem) +(Zero [4] {t} ptr mem) && t.Alignment()%2 == 0 => + (MOVHstore [2] ptr (MOVWconst [0]) + (MOVHstore [0] ptr (MOVWconst [0]) mem)) +(Zero [4] ptr mem) => + (MOVBstore [3] ptr (MOVWconst [0]) + (MOVBstore [2] ptr (MOVWconst [0]) + (MOVBstore [1] ptr (MOVWconst [0]) + (MOVBstore [0] ptr (MOVWconst [0]) mem)))) + +(Zero [3] ptr mem) => + (MOVBstore [2] ptr (MOVWconst [0]) + (MOVBstore [1] ptr (MOVWconst [0]) + (MOVBstore [0] ptr (MOVWconst [0]) mem))) + +// Medium zeroing uses a duff device +// 4 and 128 are magic constants, see runtime/mkduff.go +(Zero [s] {t} ptr mem) + && s%4 == 0 && s > 4 && s <= 512 + && t.Alignment()%4 == 0 && !config.noDuffDevice => + (DUFFZERO [4 * (128 - s/4)] ptr (MOVWconst [0]) mem) + +// Large zeroing uses a loop +(Zero [s] {t} ptr mem) + && (s > 512 || config.noDuffDevice) || t.Alignment()%4 != 0 => + (LoweredZero [t.Alignment()] + ptr + (ADDconst <ptr.Type> ptr [int32(s-moveSize(t.Alignment(), config))]) + (MOVWconst [0]) + mem) + +// moves +(Move [0] _ _ mem) => mem +(Move [1] dst src mem) => (MOVBstore dst (MOVBUload src mem) mem) +(Move [2] {t} dst src mem) && t.Alignment()%2 == 0 => + (MOVHstore dst (MOVHUload src mem) mem) +(Move [2] dst src mem) => + (MOVBstore [1] dst (MOVBUload [1] src mem) + (MOVBstore dst (MOVBUload src mem) mem)) +(Move [4] {t} dst src mem) && t.Alignment()%4 == 0 => + (MOVWstore dst (MOVWload src mem) mem) +(Move [4] {t} dst src mem) && t.Alignment()%2 == 0 => + (MOVHstore [2] dst (MOVHUload [2] src mem) + (MOVHstore dst (MOVHUload src mem) mem)) +(Move [4] dst src mem) => + (MOVBstore [3] dst (MOVBUload [3] src mem) + (MOVBstore [2] dst (MOVBUload [2] src mem) + (MOVBstore [1] dst (MOVBUload [1] src mem) + (MOVBstore dst (MOVBUload src mem) mem)))) + +(Move [3] dst src mem) => + (MOVBstore [2] dst (MOVBUload [2] src mem) + (MOVBstore [1] dst (MOVBUload [1] src mem) + (MOVBstore dst (MOVBUload src mem) mem))) + +// Medium move uses a duff device +// 8 and 128 are magic constants, see runtime/mkduff.go +(Move [s] {t} dst src mem) + && s%4 == 0 && s > 4 && s <= 512 + && t.Alignment()%4 == 0 && !config.noDuffDevice && logLargeCopy(v, s) => + (DUFFCOPY [8 * (128 - s/4)] dst src mem) + +// Large move uses a loop +(Move [s] {t} dst src mem) + && ((s > 512 || config.noDuffDevice) || t.Alignment()%4 != 0) && logLargeCopy(v, s) => + (LoweredMove [t.Alignment()] + dst + src + (ADDconst <src.Type> src [int32(s-moveSize(t.Alignment(), config))]) + mem) + +// calls +(StaticCall ...) => (CALLstatic ...) +(ClosureCall ...) => (CALLclosure ...) +(InterCall ...) => (CALLinter ...) +(TailCall ...) => (CALLtail ...) + +// checks +(NilCheck ...) => (LoweredNilCheck ...) +(IsNonNil ptr) => (NotEqual (CMPconst [0] ptr)) +(IsInBounds idx len) => (LessThanU (CMP idx len)) +(IsSliceInBounds idx len) => (LessEqualU (CMP idx len)) + +// pseudo-ops +(GetClosurePtr ...) => (LoweredGetClosurePtr ...) +(GetCallerSP ...) => (LoweredGetCallerSP ...) +(GetCallerPC ...) => (LoweredGetCallerPC ...) + +// Absorb pseudo-ops into blocks. +(If (Equal cc) yes no) => (EQ cc yes no) +(If (NotEqual cc) yes no) => (NE cc yes no) +(If (LessThan cc) yes no) => (LT cc yes no) +(If (LessThanU cc) yes no) => (ULT cc yes no) +(If (LessEqual cc) yes no) => (LE cc yes no) +(If (LessEqualU cc) yes no) => (ULE cc yes no) +(If (GreaterThan cc) yes no) => (GT cc yes no) +(If (GreaterThanU cc) yes no) => (UGT cc yes no) +(If (GreaterEqual cc) yes no) => (GE cc yes no) +(If (GreaterEqualU cc) yes no) => (UGE cc yes no) + +(If cond yes no) => (NE (CMPconst [0] cond) yes no) + +// Absorb boolean tests into block +(NE (CMPconst [0] (Equal cc)) yes no) => (EQ cc yes no) +(NE (CMPconst [0] (NotEqual cc)) yes no) => (NE cc yes no) +(NE (CMPconst [0] (LessThan cc)) yes no) => (LT cc yes no) +(NE (CMPconst [0] (LessThanU cc)) yes no) => (ULT cc yes no) +(NE (CMPconst [0] (LessEqual cc)) yes no) => (LE cc yes no) +(NE (CMPconst [0] (LessEqualU cc)) yes no) => (ULE cc yes no) +(NE (CMPconst [0] (GreaterThan cc)) yes no) => (GT cc yes no) +(NE (CMPconst [0] (GreaterThanU cc)) yes no) => (UGT cc yes no) +(NE (CMPconst [0] (GreaterEqual cc)) yes no) => (GE cc yes no) +(NE (CMPconst [0] (GreaterEqualU cc)) yes no) => (UGE cc yes no) + +// Write barrier. +(WB ...) => (LoweredWB ...) + +(PanicBounds [kind] x y mem) && boundsABI(kind) == 0 => (LoweredPanicBoundsA [kind] x y mem) +(PanicBounds [kind] x y mem) && boundsABI(kind) == 1 => (LoweredPanicBoundsB [kind] x y mem) +(PanicBounds [kind] x y mem) && boundsABI(kind) == 2 => (LoweredPanicBoundsC [kind] x y mem) + +(PanicExtend [kind] hi lo y mem) && boundsABI(kind) == 0 => (LoweredPanicExtendA [kind] hi lo y mem) +(PanicExtend [kind] hi lo y mem) && boundsABI(kind) == 1 => (LoweredPanicExtendB [kind] hi lo y mem) +(PanicExtend [kind] hi lo y mem) && boundsABI(kind) == 2 => (LoweredPanicExtendC [kind] hi lo y mem) + +// Optimizations + +// fold offset into address +(ADDconst [off1] (MOVWaddr [off2] {sym} ptr)) => (MOVWaddr [off1+off2] {sym} ptr) +(SUBconst [off1] (MOVWaddr [off2] {sym} ptr)) => (MOVWaddr [off2-off1] {sym} ptr) + +// fold address into load/store +(MOVBload [off1] {sym} (ADDconst [off2] ptr) mem) => (MOVBload [off1+off2] {sym} ptr mem) +(MOVBload [off1] {sym} (SUBconst [off2] ptr) mem) => (MOVBload [off1-off2] {sym} ptr mem) +(MOVBUload [off1] {sym} (ADDconst [off2] ptr) mem) => (MOVBUload [off1+off2] {sym} ptr mem) +(MOVBUload [off1] {sym} (SUBconst [off2] ptr) mem) => (MOVBUload [off1-off2] {sym} ptr mem) +(MOVHload [off1] {sym} (ADDconst [off2] ptr) mem) => (MOVHload [off1+off2] {sym} ptr mem) +(MOVHload [off1] {sym} (SUBconst [off2] ptr) mem) => (MOVHload [off1-off2] {sym} ptr mem) +(MOVHUload [off1] {sym} (ADDconst [off2] ptr) mem) => (MOVHUload [off1+off2] {sym} ptr mem) +(MOVHUload [off1] {sym} (SUBconst [off2] ptr) mem) => (MOVHUload [off1-off2] {sym} ptr mem) +(MOVWload [off1] {sym} (ADDconst [off2] ptr) mem) => (MOVWload [off1+off2] {sym} ptr mem) +(MOVWload [off1] {sym} (SUBconst [off2] ptr) mem) => (MOVWload [off1-off2] {sym} ptr mem) +(MOVFload [off1] {sym} (ADDconst [off2] ptr) mem) => (MOVFload [off1+off2] {sym} ptr mem) +(MOVFload [off1] {sym} (SUBconst [off2] ptr) mem) => (MOVFload [off1-off2] {sym} ptr mem) +(MOVDload [off1] {sym} (ADDconst [off2] ptr) mem) => (MOVDload [off1+off2] {sym} ptr mem) +(MOVDload [off1] {sym} (SUBconst [off2] ptr) mem) => (MOVDload [off1-off2] {sym} ptr mem) + +(MOVBstore [off1] {sym} (ADDconst [off2] ptr) val mem) => (MOVBstore [off1+off2] {sym} ptr val mem) +(MOVBstore [off1] {sym} (SUBconst [off2] ptr) val mem) => (MOVBstore [off1-off2] {sym} ptr val mem) +(MOVHstore [off1] {sym} (ADDconst [off2] ptr) val mem) => (MOVHstore [off1+off2] {sym} ptr val mem) +(MOVHstore [off1] {sym} (SUBconst [off2] ptr) val mem) => (MOVHstore [off1-off2] {sym} ptr val mem) +(MOVWstore [off1] {sym} (ADDconst [off2] ptr) val mem) => (MOVWstore [off1+off2] {sym} ptr val mem) +(MOVWstore [off1] {sym} (SUBconst [off2] ptr) val mem) => (MOVWstore [off1-off2] {sym} ptr val mem) +(MOVFstore [off1] {sym} (ADDconst [off2] ptr) val mem) => (MOVFstore [off1+off2] {sym} ptr val mem) +(MOVFstore [off1] {sym} (SUBconst [off2] ptr) val mem) => (MOVFstore [off1-off2] {sym} ptr val mem) +(MOVDstore [off1] {sym} (ADDconst [off2] ptr) val mem) => (MOVDstore [off1+off2] {sym} ptr val mem) +(MOVDstore [off1] {sym} (SUBconst [off2] ptr) val mem) => (MOVDstore [off1-off2] {sym} ptr val mem) + +(MOVBload [off1] {sym1} (MOVWaddr [off2] {sym2} ptr) mem) && canMergeSym(sym1,sym2) => + (MOVBload [off1+off2] {mergeSym(sym1,sym2)} ptr mem) +(MOVBUload [off1] {sym1} (MOVWaddr [off2] {sym2} ptr) mem) && canMergeSym(sym1,sym2) => + (MOVBUload [off1+off2] {mergeSym(sym1,sym2)} ptr mem) +(MOVHload [off1] {sym1} (MOVWaddr [off2] {sym2} ptr) mem) && canMergeSym(sym1,sym2) => + (MOVHload [off1+off2] {mergeSym(sym1,sym2)} ptr mem) +(MOVHUload [off1] {sym1} (MOVWaddr [off2] {sym2} ptr) mem) && canMergeSym(sym1,sym2) => + (MOVHUload [off1+off2] {mergeSym(sym1,sym2)} ptr mem) +(MOVWload [off1] {sym1} (MOVWaddr [off2] {sym2} ptr) mem) && canMergeSym(sym1,sym2) => + (MOVWload [off1+off2] {mergeSym(sym1,sym2)} ptr mem) +(MOVFload [off1] {sym1} (MOVWaddr [off2] {sym2} ptr) mem) && canMergeSym(sym1,sym2) => + (MOVFload [off1+off2] {mergeSym(sym1,sym2)} ptr mem) +(MOVDload [off1] {sym1} (MOVWaddr [off2] {sym2} ptr) mem) && canMergeSym(sym1,sym2) => + (MOVDload [off1+off2] {mergeSym(sym1,sym2)} ptr mem) + +(MOVBstore [off1] {sym1} (MOVWaddr [off2] {sym2} ptr) val mem) && canMergeSym(sym1,sym2) => + (MOVBstore [off1+off2] {mergeSym(sym1,sym2)} ptr val mem) +(MOVHstore [off1] {sym1} (MOVWaddr [off2] {sym2} ptr) val mem) && canMergeSym(sym1,sym2) => + (MOVHstore [off1+off2] {mergeSym(sym1,sym2)} ptr val mem) +(MOVWstore [off1] {sym1} (MOVWaddr [off2] {sym2} ptr) val mem) && canMergeSym(sym1,sym2) => + (MOVWstore [off1+off2] {mergeSym(sym1,sym2)} ptr val mem) +(MOVFstore [off1] {sym1} (MOVWaddr [off2] {sym2} ptr) val mem) && canMergeSym(sym1,sym2) => + (MOVFstore [off1+off2] {mergeSym(sym1,sym2)} ptr val mem) +(MOVDstore [off1] {sym1} (MOVWaddr [off2] {sym2} ptr) val mem) && canMergeSym(sym1,sym2) => + (MOVDstore [off1+off2] {mergeSym(sym1,sym2)} ptr val mem) + +// replace load from same location as preceding store with zero/sign extension (or copy in case of full width) +(MOVBload [off] {sym} ptr (MOVBstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) => (MOVBreg x) +(MOVBUload [off] {sym} ptr (MOVBstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) => (MOVBUreg x) +(MOVHload [off] {sym} ptr (MOVHstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) => (MOVHreg x) +(MOVHUload [off] {sym} ptr (MOVHstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) => (MOVHUreg x) +(MOVWload [off] {sym} ptr (MOVWstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) => x + +(MOVFload [off] {sym} ptr (MOVFstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) => x +(MOVDload [off] {sym} ptr (MOVDstore [off2] {sym2} ptr2 x _)) && sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) => x + +(MOVWloadidx ptr idx (MOVWstoreidx ptr2 idx x _)) && isSamePtr(ptr, ptr2) => x +(MOVWloadshiftLL ptr idx [c] (MOVWstoreshiftLL ptr2 idx [d] x _)) && c==d && isSamePtr(ptr, ptr2) => x +(MOVWloadshiftRL ptr idx [c] (MOVWstoreshiftRL ptr2 idx [d] x _)) && c==d && isSamePtr(ptr, ptr2) => x +(MOVWloadshiftRA ptr idx [c] (MOVWstoreshiftRA ptr2 idx [d] x _)) && c==d && isSamePtr(ptr, ptr2) => x +(MOVBUloadidx ptr idx (MOVBstoreidx ptr2 idx x _)) && isSamePtr(ptr, ptr2) => (MOVBUreg x) +(MOVBloadidx ptr idx (MOVBstoreidx ptr2 idx x _)) && isSamePtr(ptr, ptr2) => (MOVBreg x) +(MOVHUloadidx ptr idx (MOVHstoreidx ptr2 idx x _)) && isSamePtr(ptr, ptr2) => (MOVHUreg x) +(MOVHloadidx ptr idx (MOVHstoreidx ptr2 idx x _)) && isSamePtr(ptr, ptr2) => (MOVHreg x) + +// fold constant into arithmatic ops +(ADD x (MOVWconst [c])) => (ADDconst [c] x) +(SUB (MOVWconst [c]) x) => (RSBconst [c] x) +(SUB x (MOVWconst [c])) => (SUBconst [c] x) +(RSB (MOVWconst [c]) x) => (SUBconst [c] x) +(RSB x (MOVWconst [c])) => (RSBconst [c] x) + +(ADDS x (MOVWconst [c])) => (ADDSconst [c] x) +(SUBS x (MOVWconst [c])) => (SUBSconst [c] x) + +(ADC (MOVWconst [c]) x flags) => (ADCconst [c] x flags) +(SBC (MOVWconst [c]) x flags) => (RSCconst [c] x flags) +(SBC x (MOVWconst [c]) flags) => (SBCconst [c] x flags) + +(AND x (MOVWconst [c])) => (ANDconst [c] x) +(OR x (MOVWconst [c])) => (ORconst [c] x) +(XOR x (MOVWconst [c])) => (XORconst [c] x) +(BIC x (MOVWconst [c])) => (BICconst [c] x) + +(SLL x (MOVWconst [c])) && 0 <= c && c < 32 => (SLLconst x [c]) +(SRL x (MOVWconst [c])) && 0 <= c && c < 32 => (SRLconst x [c]) +(SRA x (MOVWconst [c])) && 0 <= c && c < 32 => (SRAconst x [c]) + +(CMP x (MOVWconst [c])) => (CMPconst [c] x) +(CMP (MOVWconst [c]) x) => (InvertFlags (CMPconst [c] x)) +(CMN x (MOVWconst [c])) => (CMNconst [c] x) +(TST x (MOVWconst [c])) => (TSTconst [c] x) +(TEQ x (MOVWconst [c])) => (TEQconst [c] x) + +(SRR x (MOVWconst [c])) => (SRRconst x [c&31]) + +// Canonicalize the order of arguments to comparisons - helps with CSE. +(CMP x y) && canonLessThan(x,y) => (InvertFlags (CMP y x)) + +// don't extend after proper load +// MOVWreg instruction is not emitted if src and dst registers are same, but it ensures the type. +(MOVBreg x:(MOVBload _ _)) => (MOVWreg x) +(MOVBUreg x:(MOVBUload _ _)) => (MOVWreg x) +(MOVHreg x:(MOVBload _ _)) => (MOVWreg x) +(MOVHreg x:(MOVBUload _ _)) => (MOVWreg x) +(MOVHreg x:(MOVHload _ _)) => (MOVWreg x) +(MOVHUreg x:(MOVBUload _ _)) => (MOVWreg x) +(MOVHUreg x:(MOVHUload _ _)) => (MOVWreg x) + +// fold extensions and ANDs together +(MOVBUreg (ANDconst [c] x)) => (ANDconst [c&0xff] x) +(MOVHUreg (ANDconst [c] x)) => (ANDconst [c&0xffff] x) +(MOVBreg (ANDconst [c] x)) && c & 0x80 == 0 => (ANDconst [c&0x7f] x) +(MOVHreg (ANDconst [c] x)) && c & 0x8000 == 0 => (ANDconst [c&0x7fff] x) + +// fold double extensions +(MOVBreg x:(MOVBreg _)) => (MOVWreg x) +(MOVBUreg x:(MOVBUreg _)) => (MOVWreg x) +(MOVHreg x:(MOVBreg _)) => (MOVWreg x) +(MOVHreg x:(MOVBUreg _)) => (MOVWreg x) +(MOVHreg x:(MOVHreg _)) => (MOVWreg x) +(MOVHUreg x:(MOVBUreg _)) => (MOVWreg x) +(MOVHUreg x:(MOVHUreg _)) => (MOVWreg x) + +// don't extend before store +(MOVBstore [off] {sym} ptr (MOVBreg x) mem) => (MOVBstore [off] {sym} ptr x mem) +(MOVBstore [off] {sym} ptr (MOVBUreg x) mem) => (MOVBstore [off] {sym} ptr x mem) +(MOVBstore [off] {sym} ptr (MOVHreg x) mem) => (MOVBstore [off] {sym} ptr x mem) +(MOVBstore [off] {sym} ptr (MOVHUreg x) mem) => (MOVBstore [off] {sym} ptr x mem) +(MOVHstore [off] {sym} ptr (MOVHreg x) mem) => (MOVHstore [off] {sym} ptr x mem) +(MOVHstore [off] {sym} ptr (MOVHUreg x) mem) => (MOVHstore [off] {sym} ptr x mem) + +// if a register move has only 1 use, just use the same register without emitting instruction +// MOVWnop doesn't emit instruction, only for ensuring the type. +(MOVWreg x) && x.Uses == 1 => (MOVWnop x) + +// TODO: we should be able to get rid of MOVWnop all together. +// But for now, this is enough to get rid of lots of them. +(MOVWnop (MOVWconst [c])) => (MOVWconst [c]) + +// mul by constant +(MUL x (MOVWconst [c])) && int32(c) == -1 => (RSBconst [0] x) +(MUL _ (MOVWconst [0])) => (MOVWconst [0]) +(MUL x (MOVWconst [1])) => x +(MUL x (MOVWconst [c])) && isPowerOfTwo32(c) => (SLLconst [int32(log32(c))] x) +(MUL x (MOVWconst [c])) && isPowerOfTwo32(c-1) && c >= 3 => (ADDshiftLL x x [int32(log32(c-1))]) +(MUL x (MOVWconst [c])) && isPowerOfTwo32(c+1) && c >= 7 => (RSBshiftLL x x [int32(log32(c+1))]) +(MUL x (MOVWconst [c])) && c%3 == 0 && isPowerOfTwo32(c/3) => (SLLconst [int32(log32(c/3))] (ADDshiftLL <x.Type> x x [1])) +(MUL x (MOVWconst [c])) && c%5 == 0 && isPowerOfTwo32(c/5) => (SLLconst [int32(log32(c/5))] (ADDshiftLL <x.Type> x x [2])) +(MUL x (MOVWconst [c])) && c%7 == 0 && isPowerOfTwo32(c/7) => (SLLconst [int32(log32(c/7))] (RSBshiftLL <x.Type> x x [3])) +(MUL x (MOVWconst [c])) && c%9 == 0 && isPowerOfTwo32(c/9) => (SLLconst [int32(log32(c/9))] (ADDshiftLL <x.Type> x x [3])) + +(MULA x (MOVWconst [c]) a) && c == -1 => (SUB a x) +(MULA _ (MOVWconst [0]) a) => a +(MULA x (MOVWconst [1]) a) => (ADD x a) +(MULA x (MOVWconst [c]) a) && isPowerOfTwo32(c) => (ADD (SLLconst <x.Type> [int32(log32(c))] x) a) +(MULA x (MOVWconst [c]) a) && isPowerOfTwo32(c-1) && c >= 3 => (ADD (ADDshiftLL <x.Type> x x [int32(log32(c-1))]) a) +(MULA x (MOVWconst [c]) a) && isPowerOfTwo32(c+1) && c >= 7 => (ADD (RSBshiftLL <x.Type> x x [int32(log32(c+1))]) a) +(MULA x (MOVWconst [c]) a) && c%3 == 0 && isPowerOfTwo32(c/3) => (ADD (SLLconst <x.Type> [int32(log32(c/3))] (ADDshiftLL <x.Type> x x [1])) a) +(MULA x (MOVWconst [c]) a) && c%5 == 0 && isPowerOfTwo32(c/5) => (ADD (SLLconst <x.Type> [int32(log32(c/5))] (ADDshiftLL <x.Type> x x [2])) a) +(MULA x (MOVWconst [c]) a) && c%7 == 0 && isPowerOfTwo32(c/7) => (ADD (SLLconst <x.Type> [int32(log32(c/7))] (RSBshiftLL <x.Type> x x [3])) a) +(MULA x (MOVWconst [c]) a) && c%9 == 0 && isPowerOfTwo32(c/9) => (ADD (SLLconst <x.Type> [int32(log32(c/9))] (ADDshiftLL <x.Type> x x [3])) a) + +(MULA (MOVWconst [c]) x a) && c == -1 => (SUB a x) +(MULA (MOVWconst [0]) _ a) => a +(MULA (MOVWconst [1]) x a) => (ADD x a) +(MULA (MOVWconst [c]) x a) && isPowerOfTwo32(c) => (ADD (SLLconst <x.Type> [int32(log32(c))] x) a) +(MULA (MOVWconst [c]) x a) && isPowerOfTwo32(c-1) && c >= 3 => (ADD (ADDshiftLL <x.Type> x x [int32(log32(c-1))]) a) +(MULA (MOVWconst [c]) x a) && isPowerOfTwo32(c+1) && c >= 7 => (ADD (RSBshiftLL <x.Type> x x [int32(log32(c+1))]) a) +(MULA (MOVWconst [c]) x a) && c%3 == 0 && isPowerOfTwo32(c/3) => (ADD (SLLconst <x.Type> [int32(log32(c/3))] (ADDshiftLL <x.Type> x x [1])) a) +(MULA (MOVWconst [c]) x a) && c%5 == 0 && isPowerOfTwo32(c/5) => (ADD (SLLconst <x.Type> [int32(log32(c/5))] (ADDshiftLL <x.Type> x x [2])) a) +(MULA (MOVWconst [c]) x a) && c%7 == 0 && isPowerOfTwo32(c/7) => (ADD (SLLconst <x.Type> [int32(log32(c/7))] (RSBshiftLL <x.Type> x x [3])) a) +(MULA (MOVWconst [c]) x a) && c%9 == 0 && isPowerOfTwo32(c/9) => (ADD (SLLconst <x.Type> [int32(log32(c/9))] (ADDshiftLL <x.Type> x x [3])) a) + +(MULS x (MOVWconst [c]) a) && c == -1 => (ADD a x) +(MULS _ (MOVWconst [0]) a) => a +(MULS x (MOVWconst [1]) a) => (RSB x a) +(MULS x (MOVWconst [c]) a) && isPowerOfTwo32(c) => (RSB (SLLconst <x.Type> [int32(log32(c))] x) a) +(MULS x (MOVWconst [c]) a) && isPowerOfTwo32(c-1) && c >= 3 => (RSB (ADDshiftLL <x.Type> x x [int32(log32(c-1))]) a) +(MULS x (MOVWconst [c]) a) && isPowerOfTwo32(c+1) && c >= 7 => (RSB (RSBshiftLL <x.Type> x x [int32(log32(c+1))]) a) +(MULS x (MOVWconst [c]) a) && c%3 == 0 && isPowerOfTwo32(c/3) => (RSB (SLLconst <x.Type> [int32(log32(c/3))] (ADDshiftLL <x.Type> x x [1])) a) +(MULS x (MOVWconst [c]) a) && c%5 == 0 && isPowerOfTwo32(c/5) => (RSB (SLLconst <x.Type> [int32(log32(c/5))] (ADDshiftLL <x.Type> x x [2])) a) +(MULS x (MOVWconst [c]) a) && c%7 == 0 && isPowerOfTwo32(c/7) => (RSB (SLLconst <x.Type> [int32(log32(c/7))] (RSBshiftLL <x.Type> x x [3])) a) +(MULS x (MOVWconst [c]) a) && c%9 == 0 && isPowerOfTwo32(c/9) => (RSB (SLLconst <x.Type> [int32(log32(c/9))] (ADDshiftLL <x.Type> x x [3])) a) + +(MULS (MOVWconst [c]) x a) && c == -1 => (ADD a x) +(MULS (MOVWconst [0]) _ a) => a +(MULS (MOVWconst [1]) x a) => (RSB x a) +(MULS (MOVWconst [c]) x a) && isPowerOfTwo32(c) => (RSB (SLLconst <x.Type> [int32(log32(c))] x) a) +(MULS (MOVWconst [c]) x a) && isPowerOfTwo32(c-1) && c >= 3 => (RSB (ADDshiftLL <x.Type> x x [int32(log32(c-1))]) a) +(MULS (MOVWconst [c]) x a) && isPowerOfTwo32(c+1) && c >= 7 => (RSB (RSBshiftLL <x.Type> x x [int32(log32(c+1))]) a) +(MULS (MOVWconst [c]) x a) && c%3 == 0 && isPowerOfTwo32(c/3) => (RSB (SLLconst <x.Type> [int32(log32(c/3))] (ADDshiftLL <x.Type> x x [1])) a) +(MULS (MOVWconst [c]) x a) && c%5 == 0 && isPowerOfTwo32(c/5) => (RSB (SLLconst <x.Type> [int32(log32(c/5))] (ADDshiftLL <x.Type> x x [2])) a) +(MULS (MOVWconst [c]) x a) && c%7 == 0 && isPowerOfTwo32(c/7) => (RSB (SLLconst <x.Type> [int32(log32(c/7))] (RSBshiftLL <x.Type> x x [3])) a) +(MULS (MOVWconst [c]) x a) && c%9 == 0 && isPowerOfTwo32(c/9) => (RSB (SLLconst <x.Type> [int32(log32(c/9))] (ADDshiftLL <x.Type> x x [3])) a) + +// div by constant +(Select0 (CALLudiv x (MOVWconst [1]))) => x +(Select1 (CALLudiv _ (MOVWconst [1]))) => (MOVWconst [0]) +(Select0 (CALLudiv x (MOVWconst [c]))) && isPowerOfTwo32(c) => (SRLconst [int32(log32(c))] x) +(Select1 (CALLudiv x (MOVWconst [c]))) && isPowerOfTwo32(c) => (ANDconst [c-1] x) + +// constant comparisons +(CMPconst (MOVWconst [x]) [y]) => (FlagConstant [subFlags32(x,y)]) +(CMNconst (MOVWconst [x]) [y]) => (FlagConstant [addFlags32(x,y)]) +(TSTconst (MOVWconst [x]) [y]) => (FlagConstant [logicFlags32(x&y)]) +(TEQconst (MOVWconst [x]) [y]) => (FlagConstant [logicFlags32(x^y)]) + +// other known comparisons +(CMPconst (MOVBUreg _) [c]) && 0xff < c => (FlagConstant [subFlags32(0, 1)]) +(CMPconst (MOVHUreg _) [c]) && 0xffff < c => (FlagConstant [subFlags32(0, 1)]) +(CMPconst (ANDconst _ [m]) [n]) && 0 <= m && m < n => (FlagConstant [subFlags32(0, 1)]) +(CMPconst (SRLconst _ [c]) [n]) && 0 <= n && 0 < c && c <= 32 && (1<<uint32(32-c)) <= uint32(n) => (FlagConstant [subFlags32(0, 1)]) + +// absorb flag constants into branches +(EQ (FlagConstant [fc]) yes no) && fc.eq() => (First yes no) +(EQ (FlagConstant [fc]) yes no) && !fc.eq() => (First no yes) + +(NE (FlagConstant [fc]) yes no) && fc.ne() => (First yes no) +(NE (FlagConstant [fc]) yes no) && !fc.ne() => (First no yes) + +(LT (FlagConstant [fc]) yes no) && fc.lt() => (First yes no) +(LT (FlagConstant [fc]) yes no) && !fc.lt() => (First no yes) + +(LE (FlagConstant [fc]) yes no) && fc.le() => (First yes no) +(LE (FlagConstant [fc]) yes no) && !fc.le() => (First no yes) + +(GT (FlagConstant [fc]) yes no) && fc.gt() => (First yes no) +(GT (FlagConstant [fc]) yes no) && !fc.gt() => (First no yes) + +(GE (FlagConstant [fc]) yes no) && fc.ge() => (First yes no) +(GE (FlagConstant [fc]) yes no) && !fc.ge() => (First no yes) + +(ULT (FlagConstant [fc]) yes no) && fc.ult() => (First yes no) +(ULT (FlagConstant [fc]) yes no) && !fc.ult() => (First no yes) + +(ULE (FlagConstant [fc]) yes no) && fc.ule() => (First yes no) +(ULE (FlagConstant [fc]) yes no) && !fc.ule() => (First no yes) + +(UGT (FlagConstant [fc]) yes no) && fc.ugt() => (First yes no) +(UGT (FlagConstant [fc]) yes no) && !fc.ugt() => (First no yes) + +(UGE (FlagConstant [fc]) yes no) && fc.uge() => (First yes no) +(UGE (FlagConstant [fc]) yes no) && !fc.uge() => (First no yes) + +(LTnoov (FlagConstant [fc]) yes no) && fc.ltNoov() => (First yes no) +(LTnoov (FlagConstant [fc]) yes no) && !fc.ltNoov() => (First no yes) + +(LEnoov (FlagConstant [fc]) yes no) && fc.leNoov() => (First yes no) +(LEnoov (FlagConstant [fc]) yes no) && !fc.leNoov() => (First no yes) + +(GTnoov (FlagConstant [fc]) yes no) && fc.gtNoov() => (First yes no) +(GTnoov (FlagConstant [fc]) yes no) && !fc.gtNoov() => (First no yes) + +(GEnoov (FlagConstant [fc]) yes no) && fc.geNoov() => (First yes no) +(GEnoov (FlagConstant [fc]) yes no) && !fc.geNoov() => (First no yes) + +// absorb InvertFlags into branches +(LT (InvertFlags cmp) yes no) => (GT cmp yes no) +(GT (InvertFlags cmp) yes no) => (LT cmp yes no) +(LE (InvertFlags cmp) yes no) => (GE cmp yes no) +(GE (InvertFlags cmp) yes no) => (LE cmp yes no) +(ULT (InvertFlags cmp) yes no) => (UGT cmp yes no) +(UGT (InvertFlags cmp) yes no) => (ULT cmp yes no) +(ULE (InvertFlags cmp) yes no) => (UGE cmp yes no) +(UGE (InvertFlags cmp) yes no) => (ULE cmp yes no) +(EQ (InvertFlags cmp) yes no) => (EQ cmp yes no) +(NE (InvertFlags cmp) yes no) => (NE cmp yes no) +(LTnoov (InvertFlags cmp) yes no) => (GTnoov cmp yes no) +(GEnoov (InvertFlags cmp) yes no) => (LEnoov cmp yes no) +(LEnoov (InvertFlags cmp) yes no) => (GEnoov cmp yes no) +(GTnoov (InvertFlags cmp) yes no) => (LTnoov cmp yes no) + +// absorb flag constants into boolean values +(Equal (FlagConstant [fc])) => (MOVWconst [b2i32(fc.eq())]) +(NotEqual (FlagConstant [fc])) => (MOVWconst [b2i32(fc.ne())]) +(LessThan (FlagConstant [fc])) => (MOVWconst [b2i32(fc.lt())]) +(LessThanU (FlagConstant [fc])) => (MOVWconst [b2i32(fc.ult())]) +(LessEqual (FlagConstant [fc])) => (MOVWconst [b2i32(fc.le())]) +(LessEqualU (FlagConstant [fc])) => (MOVWconst [b2i32(fc.ule())]) +(GreaterThan (FlagConstant [fc])) => (MOVWconst [b2i32(fc.gt())]) +(GreaterThanU (FlagConstant [fc])) => (MOVWconst [b2i32(fc.ugt())]) +(GreaterEqual (FlagConstant [fc])) => (MOVWconst [b2i32(fc.ge())]) +(GreaterEqualU (FlagConstant [fc])) => (MOVWconst [b2i32(fc.uge())]) + +// absorb InvertFlags into boolean values +(Equal (InvertFlags x)) => (Equal x) +(NotEqual (InvertFlags x)) => (NotEqual x) +(LessThan (InvertFlags x)) => (GreaterThan x) +(LessThanU (InvertFlags x)) => (GreaterThanU x) +(GreaterThan (InvertFlags x)) => (LessThan x) +(GreaterThanU (InvertFlags x)) => (LessThanU x) +(LessEqual (InvertFlags x)) => (GreaterEqual x) +(LessEqualU (InvertFlags x)) => (GreaterEqualU x) +(GreaterEqual (InvertFlags x)) => (LessEqual x) +(GreaterEqualU (InvertFlags x)) => (LessEqualU x) + +// absorb flag constants into conditional instructions +(CMOVWLSconst _ (FlagConstant [fc]) [c]) && fc.ule() => (MOVWconst [c]) +(CMOVWLSconst x (FlagConstant [fc]) [c]) && fc.ugt() => x + +(CMOVWHSconst _ (FlagConstant [fc]) [c]) && fc.uge() => (MOVWconst [c]) +(CMOVWHSconst x (FlagConstant [fc]) [c]) && fc.ult() => x + +(CMOVWLSconst x (InvertFlags flags) [c]) => (CMOVWHSconst x flags [c]) +(CMOVWHSconst x (InvertFlags flags) [c]) => (CMOVWLSconst x flags [c]) + +(SRAcond x _ (FlagConstant [fc])) && fc.uge() => (SRAconst x [31]) +(SRAcond x y (FlagConstant [fc])) && fc.ult() => (SRA x y) + +// remove redundant *const ops +(ADDconst [0] x) => x +(SUBconst [0] x) => x +(ANDconst [0] _) => (MOVWconst [0]) +(ANDconst [c] x) && int32(c)==-1 => x +(ORconst [0] x) => x +(ORconst [c] _) && int32(c)==-1 => (MOVWconst [-1]) +(XORconst [0] x) => x +(BICconst [0] x) => x +(BICconst [c] _) && int32(c)==-1 => (MOVWconst [0]) + +// generic constant folding +(ADDconst [c] x) && !isARMImmRot(uint32(c)) && isARMImmRot(uint32(-c)) => (SUBconst [-c] x) +(SUBconst [c] x) && !isARMImmRot(uint32(c)) && isARMImmRot(uint32(-c)) => (ADDconst [-c] x) +(ANDconst [c] x) && !isARMImmRot(uint32(c)) && isARMImmRot(^uint32(c)) => (BICconst [int32(^uint32(c))] x) +(BICconst [c] x) && !isARMImmRot(uint32(c)) && isARMImmRot(^uint32(c)) => (ANDconst [int32(^uint32(c))] x) +(ADDconst [c] x) && buildcfg.GOARM==7 && !isARMImmRot(uint32(c)) && uint32(c)>0xffff && uint32(-c)<=0xffff => (SUBconst [-c] x) +(SUBconst [c] x) && buildcfg.GOARM==7 && !isARMImmRot(uint32(c)) && uint32(c)>0xffff && uint32(-c)<=0xffff => (ADDconst [-c] x) +(ANDconst [c] x) && buildcfg.GOARM==7 && !isARMImmRot(uint32(c)) && uint32(c)>0xffff && ^uint32(c)<=0xffff => (BICconst [int32(^uint32(c))] x) +(BICconst [c] x) && buildcfg.GOARM==7 && !isARMImmRot(uint32(c)) && uint32(c)>0xffff && ^uint32(c)<=0xffff => (ANDconst [int32(^uint32(c))] x) +(ADDconst [c] (MOVWconst [d])) => (MOVWconst [c+d]) +(ADDconst [c] (ADDconst [d] x)) => (ADDconst [c+d] x) +(ADDconst [c] (SUBconst [d] x)) => (ADDconst [c-d] x) +(ADDconst [c] (RSBconst [d] x)) => (RSBconst [c+d] x) +(ADCconst [c] (ADDconst [d] x) flags) => (ADCconst [c+d] x flags) +(ADCconst [c] (SUBconst [d] x) flags) => (ADCconst [c-d] x flags) +(SUBconst [c] (MOVWconst [d])) => (MOVWconst [d-c]) +(SUBconst [c] (SUBconst [d] x)) => (ADDconst [-c-d] x) +(SUBconst [c] (ADDconst [d] x)) => (ADDconst [-c+d] x) +(SUBconst [c] (RSBconst [d] x)) => (RSBconst [-c+d] x) +(SBCconst [c] (ADDconst [d] x) flags) => (SBCconst [c-d] x flags) +(SBCconst [c] (SUBconst [d] x) flags) => (SBCconst [c+d] x flags) +(RSBconst [c] (MOVWconst [d])) => (MOVWconst [c-d]) +(RSBconst [c] (RSBconst [d] x)) => (ADDconst [c-d] x) +(RSBconst [c] (ADDconst [d] x)) => (RSBconst [c-d] x) +(RSBconst [c] (SUBconst [d] x)) => (RSBconst [c+d] x) +(RSCconst [c] (ADDconst [d] x) flags) => (RSCconst [c-d] x flags) +(RSCconst [c] (SUBconst [d] x) flags) => (RSCconst [c+d] x flags) +(SLLconst [c] (MOVWconst [d])) => (MOVWconst [d<<uint64(c)]) +(SRLconst [c] (MOVWconst [d])) => (MOVWconst [int32(uint32(d)>>uint64(c))]) +(SRAconst [c] (MOVWconst [d])) => (MOVWconst [d>>uint64(c)]) +(MUL (MOVWconst [c]) (MOVWconst [d])) => (MOVWconst [c*d]) +(MULA (MOVWconst [c]) (MOVWconst [d]) a) => (ADDconst [c*d] a) +(MULS (MOVWconst [c]) (MOVWconst [d]) a) => (SUBconst [c*d] a) +(Select0 (CALLudiv (MOVWconst [c]) (MOVWconst [d]))) && d != 0 => (MOVWconst [int32(uint32(c)/uint32(d))]) +(Select1 (CALLudiv (MOVWconst [c]) (MOVWconst [d]))) && d != 0 => (MOVWconst [int32(uint32(c)%uint32(d))]) +(ANDconst [c] (MOVWconst [d])) => (MOVWconst [c&d]) +(ANDconst [c] (ANDconst [d] x)) => (ANDconst [c&d] x) +(ORconst [c] (MOVWconst [d])) => (MOVWconst [c|d]) +(ORconst [c] (ORconst [d] x)) => (ORconst [c|d] x) +(XORconst [c] (MOVWconst [d])) => (MOVWconst [c^d]) +(XORconst [c] (XORconst [d] x)) => (XORconst [c^d] x) +(BICconst [c] (MOVWconst [d])) => (MOVWconst [d&^c]) +(BICconst [c] (BICconst [d] x)) => (BICconst [c|d] x) +(MVN (MOVWconst [c])) => (MOVWconst [^c]) +(MOVBreg (MOVWconst [c])) => (MOVWconst [int32(int8(c))]) +(MOVBUreg (MOVWconst [c])) => (MOVWconst [int32(uint8(c))]) +(MOVHreg (MOVWconst [c])) => (MOVWconst [int32(int16(c))]) +(MOVHUreg (MOVWconst [c])) => (MOVWconst [int32(uint16(c))]) +(MOVWreg (MOVWconst [c])) => (MOVWconst [c]) +// BFX: Width = c >> 8, LSB = c & 0xff, result = d << (32 - Width - LSB) >> (32 - Width) +(BFX [c] (MOVWconst [d])) => (MOVWconst [d<<(32-uint32(c&0xff)-uint32(c>>8))>>(32-uint32(c>>8))]) +(BFXU [c] (MOVWconst [d])) => (MOVWconst [int32(uint32(d)<<(32-uint32(c&0xff)-uint32(c>>8))>>(32-uint32(c>>8)))]) + +// absorb shifts into ops +(ADD x (SLLconst [c] y)) => (ADDshiftLL x y [c]) +(ADD x (SRLconst [c] y)) => (ADDshiftRL x y [c]) +(ADD x (SRAconst [c] y)) => (ADDshiftRA x y [c]) +(ADD x (SLL y z)) => (ADDshiftLLreg x y z) +(ADD x (SRL y z)) => (ADDshiftRLreg x y z) +(ADD x (SRA y z)) => (ADDshiftRAreg x y z) +(ADC x (SLLconst [c] y) flags) => (ADCshiftLL x y [c] flags) +(ADC x (SRLconst [c] y) flags) => (ADCshiftRL x y [c] flags) +(ADC x (SRAconst [c] y) flags) => (ADCshiftRA x y [c] flags) +(ADC x (SLL y z) flags) => (ADCshiftLLreg x y z flags) +(ADC x (SRL y z) flags) => (ADCshiftRLreg x y z flags) +(ADC x (SRA y z) flags) => (ADCshiftRAreg x y z flags) +(ADDS x (SLLconst [c] y)) => (ADDSshiftLL x y [c]) +(ADDS x (SRLconst [c] y)) => (ADDSshiftRL x y [c]) +(ADDS x (SRAconst [c] y)) => (ADDSshiftRA x y [c]) +(ADDS x (SLL y z)) => (ADDSshiftLLreg x y z) +(ADDS x (SRL y z)) => (ADDSshiftRLreg x y z) +(ADDS x (SRA y z)) => (ADDSshiftRAreg x y z) +(SUB x (SLLconst [c] y)) => (SUBshiftLL x y [c]) +(SUB (SLLconst [c] y) x) => (RSBshiftLL x y [c]) +(SUB x (SRLconst [c] y)) => (SUBshiftRL x y [c]) +(SUB (SRLconst [c] y) x) => (RSBshiftRL x y [c]) +(SUB x (SRAconst [c] y)) => (SUBshiftRA x y [c]) +(SUB (SRAconst [c] y) x) => (RSBshiftRA x y [c]) +(SUB x (SLL y z)) => (SUBshiftLLreg x y z) +(SUB (SLL y z) x) => (RSBshiftLLreg x y z) +(SUB x (SRL y z)) => (SUBshiftRLreg x y z) +(SUB (SRL y z) x) => (RSBshiftRLreg x y z) +(SUB x (SRA y z)) => (SUBshiftRAreg x y z) +(SUB (SRA y z) x) => (RSBshiftRAreg x y z) +(SBC x (SLLconst [c] y) flags) => (SBCshiftLL x y [c] flags) +(SBC (SLLconst [c] y) x flags) => (RSCshiftLL x y [c] flags) +(SBC x (SRLconst [c] y) flags) => (SBCshiftRL x y [c] flags) +(SBC (SRLconst [c] y) x flags) => (RSCshiftRL x y [c] flags) +(SBC x (SRAconst [c] y) flags) => (SBCshiftRA x y [c] flags) +(SBC (SRAconst [c] y) x flags) => (RSCshiftRA x y [c] flags) +(SBC x (SLL y z) flags) => (SBCshiftLLreg x y z flags) +(SBC (SLL y z) x flags) => (RSCshiftLLreg x y z flags) +(SBC x (SRL y z) flags) => (SBCshiftRLreg x y z flags) +(SBC (SRL y z) x flags) => (RSCshiftRLreg x y z flags) +(SBC x (SRA y z) flags) => (SBCshiftRAreg x y z flags) +(SBC (SRA y z) x flags) => (RSCshiftRAreg x y z flags) +(SUBS x (SLLconst [c] y)) => (SUBSshiftLL x y [c]) +(SUBS (SLLconst [c] y) x) => (RSBSshiftLL x y [c]) +(SUBS x (SRLconst [c] y)) => (SUBSshiftRL x y [c]) +(SUBS (SRLconst [c] y) x) => (RSBSshiftRL x y [c]) +(SUBS x (SRAconst [c] y)) => (SUBSshiftRA x y [c]) +(SUBS (SRAconst [c] y) x) => (RSBSshiftRA x y [c]) +(SUBS x (SLL y z)) => (SUBSshiftLLreg x y z) +(SUBS (SLL y z) x) => (RSBSshiftLLreg x y z) +(SUBS x (SRL y z)) => (SUBSshiftRLreg x y z) +(SUBS (SRL y z) x) => (RSBSshiftRLreg x y z) +(SUBS x (SRA y z)) => (SUBSshiftRAreg x y z) +(SUBS (SRA y z) x) => (RSBSshiftRAreg x y z) +(RSB x (SLLconst [c] y)) => (RSBshiftLL x y [c]) +(RSB (SLLconst [c] y) x) => (SUBshiftLL x y [c]) +(RSB x (SRLconst [c] y)) => (RSBshiftRL x y [c]) +(RSB (SRLconst [c] y) x) => (SUBshiftRL x y [c]) +(RSB x (SRAconst [c] y)) => (RSBshiftRA x y [c]) +(RSB (SRAconst [c] y) x) => (SUBshiftRA x y [c]) +(RSB x (SLL y z)) => (RSBshiftLLreg x y z) +(RSB (SLL y z) x) => (SUBshiftLLreg x y z) +(RSB x (SRL y z)) => (RSBshiftRLreg x y z) +(RSB (SRL y z) x) => (SUBshiftRLreg x y z) +(RSB x (SRA y z)) => (RSBshiftRAreg x y z) +(RSB (SRA y z) x) => (SUBshiftRAreg x y z) +(AND x (SLLconst [c] y)) => (ANDshiftLL x y [c]) +(AND x (SRLconst [c] y)) => (ANDshiftRL x y [c]) +(AND x (SRAconst [c] y)) => (ANDshiftRA x y [c]) +(AND x (SLL y z)) => (ANDshiftLLreg x y z) +(AND x (SRL y z)) => (ANDshiftRLreg x y z) +(AND x (SRA y z)) => (ANDshiftRAreg x y z) +(OR x (SLLconst [c] y)) => (ORshiftLL x y [c]) +(OR x (SRLconst [c] y)) => (ORshiftRL x y [c]) +(OR x (SRAconst [c] y)) => (ORshiftRA x y [c]) +(OR x (SLL y z)) => (ORshiftLLreg x y z) +(OR x (SRL y z)) => (ORshiftRLreg x y z) +(OR x (SRA y z)) => (ORshiftRAreg x y z) +(XOR x (SLLconst [c] y)) => (XORshiftLL x y [c]) +(XOR x (SRLconst [c] y)) => (XORshiftRL x y [c]) +(XOR x (SRAconst [c] y)) => (XORshiftRA x y [c]) +(XOR x (SRRconst [c] y)) => (XORshiftRR x y [c]) +(XOR x (SLL y z)) => (XORshiftLLreg x y z) +(XOR x (SRL y z)) => (XORshiftRLreg x y z) +(XOR x (SRA y z)) => (XORshiftRAreg x y z) +(BIC x (SLLconst [c] y)) => (BICshiftLL x y [c]) +(BIC x (SRLconst [c] y)) => (BICshiftRL x y [c]) +(BIC x (SRAconst [c] y)) => (BICshiftRA x y [c]) +(BIC x (SLL y z)) => (BICshiftLLreg x y z) +(BIC x (SRL y z)) => (BICshiftRLreg x y z) +(BIC x (SRA y z)) => (BICshiftRAreg x y z) +(MVN (SLLconst [c] x)) => (MVNshiftLL x [c]) +(MVN (SRLconst [c] x)) => (MVNshiftRL x [c]) +(MVN (SRAconst [c] x)) => (MVNshiftRA x [c]) +(MVN (SLL x y)) => (MVNshiftLLreg x y) +(MVN (SRL x y)) => (MVNshiftRLreg x y) +(MVN (SRA x y)) => (MVNshiftRAreg x y) + +(CMP x (SLLconst [c] y)) => (CMPshiftLL x y [c]) +(CMP (SLLconst [c] y) x) => (InvertFlags (CMPshiftLL x y [c])) +(CMP x (SRLconst [c] y)) => (CMPshiftRL x y [c]) +(CMP (SRLconst [c] y) x) => (InvertFlags (CMPshiftRL x y [c])) +(CMP x (SRAconst [c] y)) => (CMPshiftRA x y [c]) +(CMP (SRAconst [c] y) x) => (InvertFlags (CMPshiftRA x y [c])) +(CMP x (SLL y z)) => (CMPshiftLLreg x y z) +(CMP (SLL y z) x) => (InvertFlags (CMPshiftLLreg x y z)) +(CMP x (SRL y z)) => (CMPshiftRLreg x y z) +(CMP (SRL y z) x) => (InvertFlags (CMPshiftRLreg x y z)) +(CMP x (SRA y z)) => (CMPshiftRAreg x y z) +(CMP (SRA y z) x) => (InvertFlags (CMPshiftRAreg x y z)) +(TST x (SLLconst [c] y)) => (TSTshiftLL x y [c]) +(TST x (SRLconst [c] y)) => (TSTshiftRL x y [c]) +(TST x (SRAconst [c] y)) => (TSTshiftRA x y [c]) +(TST x (SLL y z)) => (TSTshiftLLreg x y z) +(TST x (SRL y z)) => (TSTshiftRLreg x y z) +(TST x (SRA y z)) => (TSTshiftRAreg x y z) +(TEQ x (SLLconst [c] y)) => (TEQshiftLL x y [c]) +(TEQ x (SRLconst [c] y)) => (TEQshiftRL x y [c]) +(TEQ x (SRAconst [c] y)) => (TEQshiftRA x y [c]) +(TEQ x (SLL y z)) => (TEQshiftLLreg x y z) +(TEQ x (SRL y z)) => (TEQshiftRLreg x y z) +(TEQ x (SRA y z)) => (TEQshiftRAreg x y z) +(CMN x (SLLconst [c] y)) => (CMNshiftLL x y [c]) +(CMN x (SRLconst [c] y)) => (CMNshiftRL x y [c]) +(CMN x (SRAconst [c] y)) => (CMNshiftRA x y [c]) +(CMN x (SLL y z)) => (CMNshiftLLreg x y z) +(CMN x (SRL y z)) => (CMNshiftRLreg x y z) +(CMN x (SRA y z)) => (CMNshiftRAreg x y z) + +// prefer *const ops to *shift ops +(ADDshiftLL (MOVWconst [c]) x [d]) => (ADDconst [c] (SLLconst <x.Type> x [d])) +(ADDshiftRL (MOVWconst [c]) x [d]) => (ADDconst [c] (SRLconst <x.Type> x [d])) +(ADDshiftRA (MOVWconst [c]) x [d]) => (ADDconst [c] (SRAconst <x.Type> x [d])) +(ADCshiftLL (MOVWconst [c]) x [d] flags) => (ADCconst [c] (SLLconst <x.Type> x [d]) flags) +(ADCshiftRL (MOVWconst [c]) x [d] flags) => (ADCconst [c] (SRLconst <x.Type> x [d]) flags) +(ADCshiftRA (MOVWconst [c]) x [d] flags) => (ADCconst [c] (SRAconst <x.Type> x [d]) flags) +(ADDSshiftLL (MOVWconst [c]) x [d]) => (ADDSconst [c] (SLLconst <x.Type> x [d])) +(ADDSshiftRL (MOVWconst [c]) x [d]) => (ADDSconst [c] (SRLconst <x.Type> x [d])) +(ADDSshiftRA (MOVWconst [c]) x [d]) => (ADDSconst [c] (SRAconst <x.Type> x [d])) +(SUBshiftLL (MOVWconst [c]) x [d]) => (RSBconst [c] (SLLconst <x.Type> x [d])) +(SUBshiftRL (MOVWconst [c]) x [d]) => (RSBconst [c] (SRLconst <x.Type> x [d])) +(SUBshiftRA (MOVWconst [c]) x [d]) => (RSBconst [c] (SRAconst <x.Type> x [d])) +(SBCshiftLL (MOVWconst [c]) x [d] flags) => (RSCconst [c] (SLLconst <x.Type> x [d]) flags) +(SBCshiftRL (MOVWconst [c]) x [d] flags) => (RSCconst [c] (SRLconst <x.Type> x [d]) flags) +(SBCshiftRA (MOVWconst [c]) x [d] flags) => (RSCconst [c] (SRAconst <x.Type> x [d]) flags) +(SUBSshiftLL (MOVWconst [c]) x [d]) => (RSBSconst [c] (SLLconst <x.Type> x [d])) +(SUBSshiftRL (MOVWconst [c]) x [d]) => (RSBSconst [c] (SRLconst <x.Type> x [d])) +(SUBSshiftRA (MOVWconst [c]) x [d]) => (RSBSconst [c] (SRAconst <x.Type> x [d])) +(RSBshiftLL (MOVWconst [c]) x [d]) => (SUBconst [c] (SLLconst <x.Type> x [d])) +(RSBshiftRL (MOVWconst [c]) x [d]) => (SUBconst [c] (SRLconst <x.Type> x [d])) +(RSBshiftRA (MOVWconst [c]) x [d]) => (SUBconst [c] (SRAconst <x.Type> x [d])) +(RSCshiftLL (MOVWconst [c]) x [d] flags) => (SBCconst [c] (SLLconst <x.Type> x [d]) flags) +(RSCshiftRL (MOVWconst [c]) x [d] flags) => (SBCconst [c] (SRLconst <x.Type> x [d]) flags) +(RSCshiftRA (MOVWconst [c]) x [d] flags) => (SBCconst [c] (SRAconst <x.Type> x [d]) flags) +(RSBSshiftLL (MOVWconst [c]) x [d]) => (SUBSconst [c] (SLLconst <x.Type> x [d])) +(RSBSshiftRL (MOVWconst [c]) x [d]) => (SUBSconst [c] (SRLconst <x.Type> x [d])) +(RSBSshiftRA (MOVWconst [c]) x [d]) => (SUBSconst [c] (SRAconst <x.Type> x [d])) +(ANDshiftLL (MOVWconst [c]) x [d]) => (ANDconst [c] (SLLconst <x.Type> x [d])) +(ANDshiftRL (MOVWconst [c]) x [d]) => (ANDconst [c] (SRLconst <x.Type> x [d])) +(ANDshiftRA (MOVWconst [c]) x [d]) => (ANDconst [c] (SRAconst <x.Type> x [d])) +(ORshiftLL (MOVWconst [c]) x [d]) => (ORconst [c] (SLLconst <x.Type> x [d])) +(ORshiftRL (MOVWconst [c]) x [d]) => (ORconst [c] (SRLconst <x.Type> x [d])) +(ORshiftRA (MOVWconst [c]) x [d]) => (ORconst [c] (SRAconst <x.Type> x [d])) +(XORshiftLL (MOVWconst [c]) x [d]) => (XORconst [c] (SLLconst <x.Type> x [d])) +(XORshiftRL (MOVWconst [c]) x [d]) => (XORconst [c] (SRLconst <x.Type> x [d])) +(XORshiftRA (MOVWconst [c]) x [d]) => (XORconst [c] (SRAconst <x.Type> x [d])) +(XORshiftRR (MOVWconst [c]) x [d]) => (XORconst [c] (SRRconst <x.Type> x [d])) +(CMPshiftLL (MOVWconst [c]) x [d]) => (InvertFlags (CMPconst [c] (SLLconst <x.Type> x [d]))) +(CMPshiftRL (MOVWconst [c]) x [d]) => (InvertFlags (CMPconst [c] (SRLconst <x.Type> x [d]))) +(CMPshiftRA (MOVWconst [c]) x [d]) => (InvertFlags (CMPconst [c] (SRAconst <x.Type> x [d]))) +(TSTshiftLL (MOVWconst [c]) x [d]) => (TSTconst [c] (SLLconst <x.Type> x [d])) +(TSTshiftRL (MOVWconst [c]) x [d]) => (TSTconst [c] (SRLconst <x.Type> x [d])) +(TSTshiftRA (MOVWconst [c]) x [d]) => (TSTconst [c] (SRAconst <x.Type> x [d])) +(TEQshiftLL (MOVWconst [c]) x [d]) => (TEQconst [c] (SLLconst <x.Type> x [d])) +(TEQshiftRL (MOVWconst [c]) x [d]) => (TEQconst [c] (SRLconst <x.Type> x [d])) +(TEQshiftRA (MOVWconst [c]) x [d]) => (TEQconst [c] (SRAconst <x.Type> x [d])) +(CMNshiftLL (MOVWconst [c]) x [d]) => (CMNconst [c] (SLLconst <x.Type> x [d])) +(CMNshiftRL (MOVWconst [c]) x [d]) => (CMNconst [c] (SRLconst <x.Type> x [d])) +(CMNshiftRA (MOVWconst [c]) x [d]) => (CMNconst [c] (SRAconst <x.Type> x [d])) + +(ADDshiftLLreg (MOVWconst [c]) x y) => (ADDconst [c] (SLL <x.Type> x y)) +(ADDshiftRLreg (MOVWconst [c]) x y) => (ADDconst [c] (SRL <x.Type> x y)) +(ADDshiftRAreg (MOVWconst [c]) x y) => (ADDconst [c] (SRA <x.Type> x y)) +(ADCshiftLLreg (MOVWconst [c]) x y flags) => (ADCconst [c] (SLL <x.Type> x y) flags) +(ADCshiftRLreg (MOVWconst [c]) x y flags) => (ADCconst [c] (SRL <x.Type> x y) flags) +(ADCshiftRAreg (MOVWconst [c]) x y flags) => (ADCconst [c] (SRA <x.Type> x y) flags) +(ADDSshiftLLreg (MOVWconst [c]) x y) => (ADDSconst [c] (SLL <x.Type> x y)) +(ADDSshiftRLreg (MOVWconst [c]) x y) => (ADDSconst [c] (SRL <x.Type> x y)) +(ADDSshiftRAreg (MOVWconst [c]) x y) => (ADDSconst [c] (SRA <x.Type> x y)) +(SUBshiftLLreg (MOVWconst [c]) x y) => (RSBconst [c] (SLL <x.Type> x y)) +(SUBshiftRLreg (MOVWconst [c]) x y) => (RSBconst [c] (SRL <x.Type> x y)) +(SUBshiftRAreg (MOVWconst [c]) x y) => (RSBconst [c] (SRA <x.Type> x y)) +(SBCshiftLLreg (MOVWconst [c]) x y flags) => (RSCconst [c] (SLL <x.Type> x y) flags) +(SBCshiftRLreg (MOVWconst [c]) x y flags) => (RSCconst [c] (SRL <x.Type> x y) flags) +(SBCshiftRAreg (MOVWconst [c]) x y flags) => (RSCconst [c] (SRA <x.Type> x y) flags) +(SUBSshiftLLreg (MOVWconst [c]) x y) => (RSBSconst [c] (SLL <x.Type> x y)) +(SUBSshiftRLreg (MOVWconst [c]) x y) => (RSBSconst [c] (SRL <x.Type> x y)) +(SUBSshiftRAreg (MOVWconst [c]) x y) => (RSBSconst [c] (SRA <x.Type> x y)) +(RSBshiftLLreg (MOVWconst [c]) x y) => (SUBconst [c] (SLL <x.Type> x y)) +(RSBshiftRLreg (MOVWconst [c]) x y) => (SUBconst [c] (SRL <x.Type> x y)) +(RSBshiftRAreg (MOVWconst [c]) x y) => (SUBconst [c] (SRA <x.Type> x y)) +(RSCshiftLLreg (MOVWconst [c]) x y flags) => (SBCconst [c] (SLL <x.Type> x y) flags) +(RSCshiftRLreg (MOVWconst [c]) x y flags) => (SBCconst [c] (SRL <x.Type> x y) flags) +(RSCshiftRAreg (MOVWconst [c]) x y flags) => (SBCconst [c] (SRA <x.Type> x y) flags) +(RSBSshiftLLreg (MOVWconst [c]) x y) => (SUBSconst [c] (SLL <x.Type> x y)) +(RSBSshiftRLreg (MOVWconst [c]) x y) => (SUBSconst [c] (SRL <x.Type> x y)) +(RSBSshiftRAreg (MOVWconst [c]) x y) => (SUBSconst [c] (SRA <x.Type> x y)) +(ANDshiftLLreg (MOVWconst [c]) x y) => (ANDconst [c] (SLL <x.Type> x y)) +(ANDshiftRLreg (MOVWconst [c]) x y) => (ANDconst [c] (SRL <x.Type> x y)) +(ANDshiftRAreg (MOVWconst [c]) x y) => (ANDconst [c] (SRA <x.Type> x y)) +(ORshiftLLreg (MOVWconst [c]) x y) => (ORconst [c] (SLL <x.Type> x y)) +(ORshiftRLreg (MOVWconst [c]) x y) => (ORconst [c] (SRL <x.Type> x y)) +(ORshiftRAreg (MOVWconst [c]) x y) => (ORconst [c] (SRA <x.Type> x y)) +(XORshiftLLreg (MOVWconst [c]) x y) => (XORconst [c] (SLL <x.Type> x y)) +(XORshiftRLreg (MOVWconst [c]) x y) => (XORconst [c] (SRL <x.Type> x y)) +(XORshiftRAreg (MOVWconst [c]) x y) => (XORconst [c] (SRA <x.Type> x y)) +(CMPshiftLLreg (MOVWconst [c]) x y) => (InvertFlags (CMPconst [c] (SLL <x.Type> x y))) +(CMPshiftRLreg (MOVWconst [c]) x y) => (InvertFlags (CMPconst [c] (SRL <x.Type> x y))) +(CMPshiftRAreg (MOVWconst [c]) x y) => (InvertFlags (CMPconst [c] (SRA <x.Type> x y))) +(TSTshiftLLreg (MOVWconst [c]) x y) => (TSTconst [c] (SLL <x.Type> x y)) +(TSTshiftRLreg (MOVWconst [c]) x y) => (TSTconst [c] (SRL <x.Type> x y)) +(TSTshiftRAreg (MOVWconst [c]) x y) => (TSTconst [c] (SRA <x.Type> x y)) +(TEQshiftLLreg (MOVWconst [c]) x y) => (TEQconst [c] (SLL <x.Type> x y)) +(TEQshiftRLreg (MOVWconst [c]) x y) => (TEQconst [c] (SRL <x.Type> x y)) +(TEQshiftRAreg (MOVWconst [c]) x y) => (TEQconst [c] (SRA <x.Type> x y)) +(CMNshiftLLreg (MOVWconst [c]) x y) => (CMNconst [c] (SLL <x.Type> x y)) +(CMNshiftRLreg (MOVWconst [c]) x y) => (CMNconst [c] (SRL <x.Type> x y)) +(CMNshiftRAreg (MOVWconst [c]) x y) => (CMNconst [c] (SRA <x.Type> x y)) + +// constant folding in *shift ops +(ADDshiftLL x (MOVWconst [c]) [d]) => (ADDconst x [c<<uint64(d)]) +(ADDshiftRL x (MOVWconst [c]) [d]) => (ADDconst x [int32(uint32(c)>>uint64(d))]) +(ADDshiftRA x (MOVWconst [c]) [d]) => (ADDconst x [c>>uint64(d)]) +(ADCshiftLL x (MOVWconst [c]) [d] flags) => (ADCconst x [c<<uint64(d)] flags) +(ADCshiftRL x (MOVWconst [c]) [d] flags) => (ADCconst x [int32(uint32(c)>>uint64(d))] flags) +(ADCshiftRA x (MOVWconst [c]) [d] flags) => (ADCconst x [c>>uint64(d)] flags) +(ADDSshiftLL x (MOVWconst [c]) [d]) => (ADDSconst x [c<<uint64(d)]) +(ADDSshiftRL x (MOVWconst [c]) [d]) => (ADDSconst x [int32(uint32(c)>>uint64(d))]) +(ADDSshiftRA x (MOVWconst [c]) [d]) => (ADDSconst x [c>>uint64(d)]) +(SUBshiftLL x (MOVWconst [c]) [d]) => (SUBconst x [c<<uint64(d)]) +(SUBshiftRL x (MOVWconst [c]) [d]) => (SUBconst x [int32(uint32(c)>>uint64(d))]) +(SUBshiftRA x (MOVWconst [c]) [d]) => (SUBconst x [c>>uint64(d)]) +(SBCshiftLL x (MOVWconst [c]) [d] flags) => (SBCconst x [c<<uint64(d)] flags) +(SBCshiftRL x (MOVWconst [c]) [d] flags) => (SBCconst x [int32(uint32(c)>>uint64(d))] flags) +(SBCshiftRA x (MOVWconst [c]) [d] flags) => (SBCconst x [c>>uint64(d)] flags) +(SUBSshiftLL x (MOVWconst [c]) [d]) => (SUBSconst x [c<<uint64(d)]) +(SUBSshiftRL x (MOVWconst [c]) [d]) => (SUBSconst x [int32(uint32(c)>>uint64(d))]) +(SUBSshiftRA x (MOVWconst [c]) [d]) => (SUBSconst x [c>>uint64(d)]) +(RSBshiftLL x (MOVWconst [c]) [d]) => (RSBconst x [c<<uint64(d)]) +(RSBshiftRL x (MOVWconst [c]) [d]) => (RSBconst x [int32(uint32(c)>>uint64(d))]) +(RSBshiftRA x (MOVWconst [c]) [d]) => (RSBconst x [c>>uint64(d)]) +(RSCshiftLL x (MOVWconst [c]) [d] flags) => (RSCconst x [c<<uint64(d)] flags) +(RSCshiftRL x (MOVWconst [c]) [d] flags) => (RSCconst x [int32(uint32(c)>>uint64(d))] flags) +(RSCshiftRA x (MOVWconst [c]) [d] flags) => (RSCconst x [c>>uint64(d)] flags) +(RSBSshiftLL x (MOVWconst [c]) [d]) => (RSBSconst x [c<<uint64(d)]) +(RSBSshiftRL x (MOVWconst [c]) [d]) => (RSBSconst x [int32(uint32(c)>>uint64(d))]) +(RSBSshiftRA x (MOVWconst [c]) [d]) => (RSBSconst x [c>>uint64(d)]) +(ANDshiftLL x (MOVWconst [c]) [d]) => (ANDconst x [c<<uint64(d)]) +(ANDshiftRL x (MOVWconst [c]) [d]) => (ANDconst x [int32(uint32(c)>>uint64(d))]) +(ANDshiftRA x (MOVWconst [c]) [d]) => (ANDconst x [c>>uint64(d)]) +(ORshiftLL x (MOVWconst [c]) [d]) => (ORconst x [c<<uint64(d)]) +(ORshiftRL x (MOVWconst [c]) [d]) => (ORconst x [int32(uint32(c)>>uint64(d))]) +(ORshiftRA x (MOVWconst [c]) [d]) => (ORconst x [c>>uint64(d)]) +(XORshiftLL x (MOVWconst [c]) [d]) => (XORconst x [c<<uint64(d)]) +(XORshiftRL x (MOVWconst [c]) [d]) => (XORconst x [int32(uint32(c)>>uint64(d))]) +(XORshiftRA x (MOVWconst [c]) [d]) => (XORconst x [c>>uint64(d)]) +(XORshiftRR x (MOVWconst [c]) [d]) => (XORconst x [int32(uint32(c)>>uint64(d)|uint32(c)<<uint64(32-d))]) +(BICshiftLL x (MOVWconst [c]) [d]) => (BICconst x [c<<uint64(d)]) +(BICshiftRL x (MOVWconst [c]) [d]) => (BICconst x [int32(uint32(c)>>uint64(d))]) +(BICshiftRA x (MOVWconst [c]) [d]) => (BICconst x [c>>uint64(d)]) +(MVNshiftLL (MOVWconst [c]) [d]) => (MOVWconst [^(c<<uint64(d))]) +(MVNshiftRL (MOVWconst [c]) [d]) => (MOVWconst [^int32(uint32(c)>>uint64(d))]) +(MVNshiftRA (MOVWconst [c]) [d]) => (MOVWconst [int32(c)>>uint64(d)]) +(CMPshiftLL x (MOVWconst [c]) [d]) => (CMPconst x [c<<uint64(d)]) +(CMPshiftRL x (MOVWconst [c]) [d]) => (CMPconst x [int32(uint32(c)>>uint64(d))]) +(CMPshiftRA x (MOVWconst [c]) [d]) => (CMPconst x [c>>uint64(d)]) +(TSTshiftLL x (MOVWconst [c]) [d]) => (TSTconst x [c<<uint64(d)]) +(TSTshiftRL x (MOVWconst [c]) [d]) => (TSTconst x [int32(uint32(c)>>uint64(d))]) +(TSTshiftRA x (MOVWconst [c]) [d]) => (TSTconst x [c>>uint64(d)]) +(TEQshiftLL x (MOVWconst [c]) [d]) => (TEQconst x [c<<uint64(d)]) +(TEQshiftRL x (MOVWconst [c]) [d]) => (TEQconst x [int32(uint32(c)>>uint64(d))]) +(TEQshiftRA x (MOVWconst [c]) [d]) => (TEQconst x [c>>uint64(d)]) +(CMNshiftLL x (MOVWconst [c]) [d]) => (CMNconst x [c<<uint64(d)]) +(CMNshiftRL x (MOVWconst [c]) [d]) => (CMNconst x [int32(uint32(c)>>uint64(d))]) +(CMNshiftRA x (MOVWconst [c]) [d]) => (CMNconst x [c>>uint64(d)]) + +(ADDshiftLLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (ADDshiftLL x y [c]) +(ADDshiftRLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (ADDshiftRL x y [c]) +(ADDshiftRAreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (ADDshiftRA x y [c]) +(ADCshiftLLreg x y (MOVWconst [c]) flags) && 0 <= c && c < 32 => (ADCshiftLL x y [c] flags) +(ADCshiftRLreg x y (MOVWconst [c]) flags) && 0 <= c && c < 32 => (ADCshiftRL x y [c] flags) +(ADCshiftRAreg x y (MOVWconst [c]) flags) && 0 <= c && c < 32 => (ADCshiftRA x y [c] flags) +(ADDSshiftLLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (ADDSshiftLL x y [c]) +(ADDSshiftRLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (ADDSshiftRL x y [c]) +(ADDSshiftRAreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (ADDSshiftRA x y [c]) +(SUBshiftLLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (SUBshiftLL x y [c]) +(SUBshiftRLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (SUBshiftRL x y [c]) +(SUBshiftRAreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (SUBshiftRA x y [c]) +(SBCshiftLLreg x y (MOVWconst [c]) flags) && 0 <= c && c < 32 => (SBCshiftLL x y [c] flags) +(SBCshiftRLreg x y (MOVWconst [c]) flags) && 0 <= c && c < 32 => (SBCshiftRL x y [c] flags) +(SBCshiftRAreg x y (MOVWconst [c]) flags) && 0 <= c && c < 32 => (SBCshiftRA x y [c] flags) +(SUBSshiftLLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (SUBSshiftLL x y [c]) +(SUBSshiftRLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (SUBSshiftRL x y [c]) +(SUBSshiftRAreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (SUBSshiftRA x y [c]) +(RSBshiftLLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (RSBshiftLL x y [c]) +(RSBshiftRLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (RSBshiftRL x y [c]) +(RSBshiftRAreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (RSBshiftRA x y [c]) +(RSCshiftLLreg x y (MOVWconst [c]) flags) && 0 <= c && c < 32 => (RSCshiftLL x y [c] flags) +(RSCshiftRLreg x y (MOVWconst [c]) flags) && 0 <= c && c < 32 => (RSCshiftRL x y [c] flags) +(RSCshiftRAreg x y (MOVWconst [c]) flags) && 0 <= c && c < 32 => (RSCshiftRA x y [c] flags) +(RSBSshiftLLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (RSBSshiftLL x y [c]) +(RSBSshiftRLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (RSBSshiftRL x y [c]) +(RSBSshiftRAreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (RSBSshiftRA x y [c]) +(ANDshiftLLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (ANDshiftLL x y [c]) +(ANDshiftRLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (ANDshiftRL x y [c]) +(ANDshiftRAreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (ANDshiftRA x y [c]) +(ORshiftLLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (ORshiftLL x y [c]) +(ORshiftRLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (ORshiftRL x y [c]) +(ORshiftRAreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (ORshiftRA x y [c]) +(XORshiftLLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (XORshiftLL x y [c]) +(XORshiftRLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (XORshiftRL x y [c]) +(XORshiftRAreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (XORshiftRA x y [c]) +(BICshiftLLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (BICshiftLL x y [c]) +(BICshiftRLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (BICshiftRL x y [c]) +(BICshiftRAreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (BICshiftRA x y [c]) +(MVNshiftLLreg x (MOVWconst [c])) && 0 <= c && c < 32 => (MVNshiftLL x [c]) +(MVNshiftRLreg x (MOVWconst [c])) && 0 <= c && c < 32 => (MVNshiftRL x [c]) +(MVNshiftRAreg x (MOVWconst [c])) && 0 <= c && c < 32 => (MVNshiftRA x [c]) +(CMPshiftLLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (CMPshiftLL x y [c]) +(CMPshiftRLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (CMPshiftRL x y [c]) +(CMPshiftRAreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (CMPshiftRA x y [c]) +(TSTshiftLLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (TSTshiftLL x y [c]) +(TSTshiftRLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (TSTshiftRL x y [c]) +(TSTshiftRAreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (TSTshiftRA x y [c]) +(TEQshiftLLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (TEQshiftLL x y [c]) +(TEQshiftRLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (TEQshiftRL x y [c]) +(TEQshiftRAreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (TEQshiftRA x y [c]) +(CMNshiftLLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (CMNshiftLL x y [c]) +(CMNshiftRLreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (CMNshiftRL x y [c]) +(CMNshiftRAreg x y (MOVWconst [c])) && 0 <= c && c < 32 => (CMNshiftRA x y [c]) + +// Generate rotates +(ADDshiftLL [c] (SRLconst x [32-c]) x) => (SRRconst [32-c] x) +( ORshiftLL [c] (SRLconst x [32-c]) x) => (SRRconst [32-c] x) +(XORshiftLL [c] (SRLconst x [32-c]) x) => (SRRconst [32-c] x) +(ADDshiftRL [c] (SLLconst x [32-c]) x) => (SRRconst [ c] x) +( ORshiftRL [c] (SLLconst x [32-c]) x) => (SRRconst [ c] x) +(XORshiftRL [c] (SLLconst x [32-c]) x) => (SRRconst [ c] x) + +(RotateLeft16 <t> x (MOVWconst [c])) => (Or16 (Lsh16x32 <t> x (MOVWconst [c&15])) (Rsh16Ux32 <t> x (MOVWconst [-c&15]))) +(RotateLeft8 <t> x (MOVWconst [c])) => (Or8 (Lsh8x32 <t> x (MOVWconst [c&7])) (Rsh8Ux32 <t> x (MOVWconst [-c&7]))) +(RotateLeft32 x y) => (SRR x (RSBconst [0] <y.Type> y)) + +// ((x>>8) | (x<<8)) -> (REV16 x), the type of x is uint16, "|" can also be "^" or "+". +// UBFX instruction is supported by ARMv6T2, ARMv7 and above versions, REV16 is supported by +// ARMv6 and above versions. So for ARMv6, we need to match SLLconst, SRLconst and ORshiftLL. +((ADDshiftLL|ORshiftLL|XORshiftLL) <typ.UInt16> [8] (BFXU <typ.UInt16> [int32(armBFAuxInt(8, 8))] x) x) => (REV16 x) +((ADDshiftLL|ORshiftLL|XORshiftLL) <typ.UInt16> [8] (SRLconst <typ.UInt16> [24] (SLLconst [16] x)) x) && buildcfg.GOARM>=6 => (REV16 x) + +// use indexed loads and stores +(MOVWload [0] {sym} (ADD ptr idx) mem) && sym == nil => (MOVWloadidx ptr idx mem) +(MOVWstore [0] {sym} (ADD ptr idx) val mem) && sym == nil => (MOVWstoreidx ptr idx val mem) +(MOVWload [0] {sym} (ADDshiftLL ptr idx [c]) mem) && sym == nil => (MOVWloadshiftLL ptr idx [c] mem) +(MOVWload [0] {sym} (ADDshiftRL ptr idx [c]) mem) && sym == nil => (MOVWloadshiftRL ptr idx [c] mem) +(MOVWload [0] {sym} (ADDshiftRA ptr idx [c]) mem) && sym == nil => (MOVWloadshiftRA ptr idx [c] mem) +(MOVWstore [0] {sym} (ADDshiftLL ptr idx [c]) val mem) && sym == nil => (MOVWstoreshiftLL ptr idx [c] val mem) +(MOVWstore [0] {sym} (ADDshiftRL ptr idx [c]) val mem) && sym == nil => (MOVWstoreshiftRL ptr idx [c] val mem) +(MOVWstore [0] {sym} (ADDshiftRA ptr idx [c]) val mem) && sym == nil => (MOVWstoreshiftRA ptr idx [c] val mem) +(MOVBUload [0] {sym} (ADD ptr idx) mem) && sym == nil => (MOVBUloadidx ptr idx mem) +(MOVBload [0] {sym} (ADD ptr idx) mem) && sym == nil => (MOVBloadidx ptr idx mem) +(MOVBstore [0] {sym} (ADD ptr idx) val mem) && sym == nil => (MOVBstoreidx ptr idx val mem) +(MOVHUload [0] {sym} (ADD ptr idx) mem) && sym == nil => (MOVHUloadidx ptr idx mem) +(MOVHload [0] {sym} (ADD ptr idx) mem) && sym == nil => (MOVHloadidx ptr idx mem) +(MOVHstore [0] {sym} (ADD ptr idx) val mem) && sym == nil => (MOVHstoreidx ptr idx val mem) + +// constant folding in indexed loads and stores +(MOVWloadidx ptr (MOVWconst [c]) mem) => (MOVWload [c] ptr mem) +(MOVWloadidx (MOVWconst [c]) ptr mem) => (MOVWload [c] ptr mem) +(MOVBloadidx ptr (MOVWconst [c]) mem) => (MOVBload [c] ptr mem) +(MOVBloadidx (MOVWconst [c]) ptr mem) => (MOVBload [c] ptr mem) +(MOVBUloadidx ptr (MOVWconst [c]) mem) => (MOVBUload [c] ptr mem) +(MOVBUloadidx (MOVWconst [c]) ptr mem) => (MOVBUload [c] ptr mem) +(MOVHUloadidx ptr (MOVWconst [c]) mem) => (MOVHUload [c] ptr mem) +(MOVHUloadidx (MOVWconst [c]) ptr mem) => (MOVHUload [c] ptr mem) +(MOVHloadidx ptr (MOVWconst [c]) mem) => (MOVHload [c] ptr mem) +(MOVHloadidx (MOVWconst [c]) ptr mem) => (MOVHload [c] ptr mem) + +(MOVWstoreidx ptr (MOVWconst [c]) val mem) => (MOVWstore [c] ptr val mem) +(MOVWstoreidx (MOVWconst [c]) ptr val mem) => (MOVWstore [c] ptr val mem) +(MOVBstoreidx ptr (MOVWconst [c]) val mem) => (MOVBstore [c] ptr val mem) +(MOVBstoreidx (MOVWconst [c]) ptr val mem) => (MOVBstore [c] ptr val mem) +(MOVHstoreidx ptr (MOVWconst [c]) val mem) => (MOVHstore [c] ptr val mem) +(MOVHstoreidx (MOVWconst [c]) ptr val mem) => (MOVHstore [c] ptr val mem) + +(MOVWloadidx ptr (SLLconst idx [c]) mem) => (MOVWloadshiftLL ptr idx [c] mem) +(MOVWloadidx (SLLconst idx [c]) ptr mem) => (MOVWloadshiftLL ptr idx [c] mem) +(MOVWloadidx ptr (SRLconst idx [c]) mem) => (MOVWloadshiftRL ptr idx [c] mem) +(MOVWloadidx (SRLconst idx [c]) ptr mem) => (MOVWloadshiftRL ptr idx [c] mem) +(MOVWloadidx ptr (SRAconst idx [c]) mem) => (MOVWloadshiftRA ptr idx [c] mem) +(MOVWloadidx (SRAconst idx [c]) ptr mem) => (MOVWloadshiftRA ptr idx [c] mem) + +(MOVWstoreidx ptr (SLLconst idx [c]) val mem) => (MOVWstoreshiftLL ptr idx [c] val mem) +(MOVWstoreidx (SLLconst idx [c]) ptr val mem) => (MOVWstoreshiftLL ptr idx [c] val mem) +(MOVWstoreidx ptr (SRLconst idx [c]) val mem) => (MOVWstoreshiftRL ptr idx [c] val mem) +(MOVWstoreidx (SRLconst idx [c]) ptr val mem) => (MOVWstoreshiftRL ptr idx [c] val mem) +(MOVWstoreidx ptr (SRAconst idx [c]) val mem) => (MOVWstoreshiftRA ptr idx [c] val mem) +(MOVWstoreidx (SRAconst idx [c]) ptr val mem) => (MOVWstoreshiftRA ptr idx [c] val mem) + +(MOVWloadshiftLL ptr (MOVWconst [c]) [d] mem) => (MOVWload [int32(uint32(c)<<uint64(d))] ptr mem) +(MOVWloadshiftRL ptr (MOVWconst [c]) [d] mem) => (MOVWload [int32(uint32(c)>>uint64(d))] ptr mem) +(MOVWloadshiftRA ptr (MOVWconst [c]) [d] mem) => (MOVWload [c>>uint64(d)] ptr mem) + +(MOVWstoreshiftLL ptr (MOVWconst [c]) [d] val mem) => (MOVWstore [int32(uint32(c)<<uint64(d))] ptr val mem) +(MOVWstoreshiftRL ptr (MOVWconst [c]) [d] val mem) => (MOVWstore [int32(uint32(c)>>uint64(d))] ptr val mem) +(MOVWstoreshiftRA ptr (MOVWconst [c]) [d] val mem) => (MOVWstore [c>>uint64(d)] ptr val mem) + +// generic simplifications +(ADD x (RSBconst [0] y)) => (SUB x y) +(ADD <t> (RSBconst [c] x) (RSBconst [d] y)) => (RSBconst [c+d] (ADD <t> x y)) +(SUB x x) => (MOVWconst [0]) +(RSB x x) => (MOVWconst [0]) +(AND x x) => x +(OR x x) => x +(XOR x x) => (MOVWconst [0]) +(BIC x x) => (MOVWconst [0]) + +(ADD (MUL x y) a) => (MULA x y a) +(SUB a (MUL x y)) && buildcfg.GOARM == 7 => (MULS x y a) +(RSB (MUL x y) a) && buildcfg.GOARM == 7 => (MULS x y a) + +(NEGF (MULF x y)) && buildcfg.GOARM >= 6 => (NMULF x y) +(NEGD (MULD x y)) && buildcfg.GOARM >= 6 => (NMULD x y) +(MULF (NEGF x) y) && buildcfg.GOARM >= 6 => (NMULF x y) +(MULD (NEGD x) y) && buildcfg.GOARM >= 6 => (NMULD x y) +(NMULF (NEGF x) y) => (MULF x y) +(NMULD (NEGD x) y) => (MULD x y) + +// the result will overwrite the addend, since they are in the same register +(ADDF a (MULF x y)) && a.Uses == 1 && buildcfg.GOARM >= 6 => (MULAF a x y) +(ADDF a (NMULF x y)) && a.Uses == 1 && buildcfg.GOARM >= 6 => (MULSF a x y) +(ADDD a (MULD x y)) && a.Uses == 1 && buildcfg.GOARM >= 6 => (MULAD a x y) +(ADDD a (NMULD x y)) && a.Uses == 1 && buildcfg.GOARM >= 6 => (MULSD a x y) +(SUBF a (MULF x y)) && a.Uses == 1 && buildcfg.GOARM >= 6 => (MULSF a x y) +(SUBF a (NMULF x y)) && a.Uses == 1 && buildcfg.GOARM >= 6 => (MULAF a x y) +(SUBD a (MULD x y)) && a.Uses == 1 && buildcfg.GOARM >= 6 => (MULSD a x y) +(SUBD a (NMULD x y)) && a.Uses == 1 && buildcfg.GOARM >= 6 => (MULAD a x y) + +(AND x (MVN y)) => (BIC x y) + +// simplification with *shift ops +(SUBshiftLL (SLLconst x [c]) x [c]) => (MOVWconst [0]) +(SUBshiftRL (SRLconst x [c]) x [c]) => (MOVWconst [0]) +(SUBshiftRA (SRAconst x [c]) x [c]) => (MOVWconst [0]) +(RSBshiftLL (SLLconst x [c]) x [c]) => (MOVWconst [0]) +(RSBshiftRL (SRLconst x [c]) x [c]) => (MOVWconst [0]) +(RSBshiftRA (SRAconst x [c]) x [c]) => (MOVWconst [0]) +(ANDshiftLL y:(SLLconst x [c]) x [c]) => y +(ANDshiftRL y:(SRLconst x [c]) x [c]) => y +(ANDshiftRA y:(SRAconst x [c]) x [c]) => y +(ORshiftLL y:(SLLconst x [c]) x [c]) => y +(ORshiftRL y:(SRLconst x [c]) x [c]) => y +(ORshiftRA y:(SRAconst x [c]) x [c]) => y +(XORshiftLL (SLLconst x [c]) x [c]) => (MOVWconst [0]) +(XORshiftRL (SRLconst x [c]) x [c]) => (MOVWconst [0]) +(XORshiftRA (SRAconst x [c]) x [c]) => (MOVWconst [0]) +(BICshiftLL (SLLconst x [c]) x [c]) => (MOVWconst [0]) +(BICshiftRL (SRLconst x [c]) x [c]) => (MOVWconst [0]) +(BICshiftRA (SRAconst x [c]) x [c]) => (MOVWconst [0]) +(AND x (MVNshiftLL y [c])) => (BICshiftLL x y [c]) +(AND x (MVNshiftRL y [c])) => (BICshiftRL x y [c]) +(AND x (MVNshiftRA y [c])) => (BICshiftRA x y [c]) + +// floating point optimizations +(CMPF x (MOVFconst [0])) => (CMPF0 x) +(CMPD x (MOVDconst [0])) => (CMPD0 x) + +// bit extraction +(SRAconst (SLLconst x [c]) [d]) && buildcfg.GOARM==7 && uint64(d)>=uint64(c) && uint64(d)<=31 => (BFX [(d-c)|(32-d)<<8] x) +(SRLconst (SLLconst x [c]) [d]) && buildcfg.GOARM==7 && uint64(d)>=uint64(c) && uint64(d)<=31 => (BFXU [(d-c)|(32-d)<<8] x) + +// comparison simplification +((EQ|NE) (CMP x (RSBconst [0] y))) => ((EQ|NE) (CMN x y)) // sense of carry bit not preserved; see also #50854 +((EQ|NE) (CMN x (RSBconst [0] y))) => ((EQ|NE) (CMP x y)) // sense of carry bit not preserved; see also #50864 +(EQ (CMPconst [0] l:(SUB x y)) yes no) && l.Uses==1 => (EQ (CMP x y) yes no) +(EQ (CMPconst [0] l:(MULS x y a)) yes no) && l.Uses==1 => (EQ (CMP a (MUL <x.Type> x y)) yes no) +(EQ (CMPconst [0] l:(SUBconst [c] x)) yes no) && l.Uses==1 => (EQ (CMPconst [c] x) yes no) +(EQ (CMPconst [0] l:(SUBshiftLL x y [c])) yes no) && l.Uses==1 => (EQ (CMPshiftLL x y [c]) yes no) +(EQ (CMPconst [0] l:(SUBshiftRL x y [c])) yes no) && l.Uses==1 => (EQ (CMPshiftRL x y [c]) yes no) +(EQ (CMPconst [0] l:(SUBshiftRA x y [c])) yes no) && l.Uses==1 => (EQ (CMPshiftRA x y [c]) yes no) +(EQ (CMPconst [0] l:(SUBshiftLLreg x y z)) yes no) && l.Uses==1 => (EQ (CMPshiftLLreg x y z) yes no) +(EQ (CMPconst [0] l:(SUBshiftRLreg x y z)) yes no) && l.Uses==1 => (EQ (CMPshiftRLreg x y z) yes no) +(EQ (CMPconst [0] l:(SUBshiftRAreg x y z)) yes no) && l.Uses==1 => (EQ (CMPshiftRAreg x y z) yes no) +(NE (CMPconst [0] l:(SUB x y)) yes no) && l.Uses==1 => (NE (CMP x y) yes no) +(NE (CMPconst [0] l:(MULS x y a)) yes no) && l.Uses==1 => (NE (CMP a (MUL <x.Type> x y)) yes no) +(NE (CMPconst [0] l:(SUBconst [c] x)) yes no) && l.Uses==1 => (NE (CMPconst [c] x) yes no) +(NE (CMPconst [0] l:(SUBshiftLL x y [c])) yes no) && l.Uses==1 => (NE (CMPshiftLL x y [c]) yes no) +(NE (CMPconst [0] l:(SUBshiftRL x y [c])) yes no) && l.Uses==1 => (NE (CMPshiftRL x y [c]) yes no) +(NE (CMPconst [0] l:(SUBshiftRA x y [c])) yes no) && l.Uses==1 => (NE (CMPshiftRA x y [c]) yes no) +(NE (CMPconst [0] l:(SUBshiftLLreg x y z)) yes no) && l.Uses==1 => (NE (CMPshiftLLreg x y z) yes no) +(NE (CMPconst [0] l:(SUBshiftRLreg x y z)) yes no) && l.Uses==1 => (NE (CMPshiftRLreg x y z) yes no) +(NE (CMPconst [0] l:(SUBshiftRAreg x y z)) yes no) && l.Uses==1 => (NE (CMPshiftRAreg x y z) yes no) +(EQ (CMPconst [0] l:(ADD x y)) yes no) && l.Uses==1 => (EQ (CMN x y) yes no) +(EQ (CMPconst [0] l:(MULA x y a)) yes no) && l.Uses==1 => (EQ (CMN a (MUL <x.Type> x y)) yes no) +(EQ (CMPconst [0] l:(ADDconst [c] x)) yes no) && l.Uses==1 => (EQ (CMNconst [c] x) yes no) +(EQ (CMPconst [0] l:(ADDshiftLL x y [c])) yes no) && l.Uses==1 => (EQ (CMNshiftLL x y [c]) yes no) +(EQ (CMPconst [0] l:(ADDshiftRL x y [c])) yes no) && l.Uses==1 => (EQ (CMNshiftRL x y [c]) yes no) +(EQ (CMPconst [0] l:(ADDshiftRA x y [c])) yes no) && l.Uses==1 => (EQ (CMNshiftRA x y [c]) yes no) +(EQ (CMPconst [0] l:(ADDshiftLLreg x y z)) yes no) && l.Uses==1 => (EQ (CMNshiftLLreg x y z) yes no) +(EQ (CMPconst [0] l:(ADDshiftRLreg x y z)) yes no) && l.Uses==1 => (EQ (CMNshiftRLreg x y z) yes no) +(EQ (CMPconst [0] l:(ADDshiftRAreg x y z)) yes no) && l.Uses==1 => (EQ (CMNshiftRAreg x y z) yes no) +(NE (CMPconst [0] l:(ADD x y)) yes no) && l.Uses==1 => (NE (CMN x y) yes no) +(NE (CMPconst [0] l:(MULA x y a)) yes no) && l.Uses==1 => (NE (CMN a (MUL <x.Type> x y)) yes no) +(NE (CMPconst [0] l:(ADDconst [c] x)) yes no) && l.Uses==1 => (NE (CMNconst [c] x) yes no) +(NE (CMPconst [0] l:(ADDshiftLL x y [c])) yes no) && l.Uses==1 => (NE (CMNshiftLL x y [c]) yes no) +(NE (CMPconst [0] l:(ADDshiftRL x y [c])) yes no) && l.Uses==1 => (NE (CMNshiftRL x y [c]) yes no) +(NE (CMPconst [0] l:(ADDshiftRA x y [c])) yes no) && l.Uses==1 => (NE (CMNshiftRA x y [c]) yes no) +(NE (CMPconst [0] l:(ADDshiftLLreg x y z)) yes no) && l.Uses==1 => (NE (CMNshiftLLreg x y z) yes no) +(NE (CMPconst [0] l:(ADDshiftRLreg x y z)) yes no) && l.Uses==1 => (NE (CMNshiftRLreg x y z) yes no) +(NE (CMPconst [0] l:(ADDshiftRAreg x y z)) yes no) && l.Uses==1 => (NE (CMNshiftRAreg x y z) yes no) +(EQ (CMPconst [0] l:(AND x y)) yes no) && l.Uses==1 => (EQ (TST x y) yes no) +(EQ (CMPconst [0] l:(ANDconst [c] x)) yes no) && l.Uses==1 => (EQ (TSTconst [c] x) yes no) +(EQ (CMPconst [0] l:(ANDshiftLL x y [c])) yes no) && l.Uses==1 => (EQ (TSTshiftLL x y [c]) yes no) +(EQ (CMPconst [0] l:(ANDshiftRL x y [c])) yes no) && l.Uses==1 => (EQ (TSTshiftRL x y [c]) yes no) +(EQ (CMPconst [0] l:(ANDshiftRA x y [c])) yes no) && l.Uses==1 => (EQ (TSTshiftRA x y [c]) yes no) +(EQ (CMPconst [0] l:(ANDshiftLLreg x y z)) yes no) && l.Uses==1 => (EQ (TSTshiftLLreg x y z) yes no) +(EQ (CMPconst [0] l:(ANDshiftRLreg x y z)) yes no) && l.Uses==1 => (EQ (TSTshiftRLreg x y z) yes no) +(EQ (CMPconst [0] l:(ANDshiftRAreg x y z)) yes no) && l.Uses==1 => (EQ (TSTshiftRAreg x y z) yes no) +(NE (CMPconst [0] l:(AND x y)) yes no) && l.Uses==1 => (NE (TST x y) yes no) +(NE (CMPconst [0] l:(ANDconst [c] x)) yes no) && l.Uses==1 => (NE (TSTconst [c] x) yes no) +(NE (CMPconst [0] l:(ANDshiftLL x y [c])) yes no) && l.Uses==1 => (NE (TSTshiftLL x y [c]) yes no) +(NE (CMPconst [0] l:(ANDshiftRL x y [c])) yes no) && l.Uses==1 => (NE (TSTshiftRL x y [c]) yes no) +(NE (CMPconst [0] l:(ANDshiftRA x y [c])) yes no) && l.Uses==1 => (NE (TSTshiftRA x y [c]) yes no) +(NE (CMPconst [0] l:(ANDshiftLLreg x y z)) yes no) && l.Uses==1 => (NE (TSTshiftLLreg x y z) yes no) +(NE (CMPconst [0] l:(ANDshiftRLreg x y z)) yes no) && l.Uses==1 => (NE (TSTshiftRLreg x y z) yes no) +(NE (CMPconst [0] l:(ANDshiftRAreg x y z)) yes no) && l.Uses==1 => (NE (TSTshiftRAreg x y z) yes no) +(EQ (CMPconst [0] l:(XOR x y)) yes no) && l.Uses==1 => (EQ (TEQ x y) yes no) +(EQ (CMPconst [0] l:(XORconst [c] x)) yes no) && l.Uses==1 => (EQ (TEQconst [c] x) yes no) +(EQ (CMPconst [0] l:(XORshiftLL x y [c])) yes no) && l.Uses==1 => (EQ (TEQshiftLL x y [c]) yes no) +(EQ (CMPconst [0] l:(XORshiftRL x y [c])) yes no) && l.Uses==1 => (EQ (TEQshiftRL x y [c]) yes no) +(EQ (CMPconst [0] l:(XORshiftRA x y [c])) yes no) && l.Uses==1 => (EQ (TEQshiftRA x y [c]) yes no) +(EQ (CMPconst [0] l:(XORshiftLLreg x y z)) yes no) && l.Uses==1 => (EQ (TEQshiftLLreg x y z) yes no) +(EQ (CMPconst [0] l:(XORshiftRLreg x y z)) yes no) && l.Uses==1 => (EQ (TEQshiftRLreg x y z) yes no) +(EQ (CMPconst [0] l:(XORshiftRAreg x y z)) yes no) && l.Uses==1 => (EQ (TEQshiftRAreg x y z) yes no) +(NE (CMPconst [0] l:(XOR x y)) yes no) && l.Uses==1 => (NE (TEQ x y) yes no) +(NE (CMPconst [0] l:(XORconst [c] x)) yes no) && l.Uses==1 => (NE (TEQconst [c] x) yes no) +(NE (CMPconst [0] l:(XORshiftLL x y [c])) yes no) && l.Uses==1 => (NE (TEQshiftLL x y [c]) yes no) +(NE (CMPconst [0] l:(XORshiftRL x y [c])) yes no) && l.Uses==1 => (NE (TEQshiftRL x y [c]) yes no) +(NE (CMPconst [0] l:(XORshiftRA x y [c])) yes no) && l.Uses==1 => (NE (TEQshiftRA x y [c]) yes no) +(NE (CMPconst [0] l:(XORshiftLLreg x y z)) yes no) && l.Uses==1 => (NE (TEQshiftLLreg x y z) yes no) +(NE (CMPconst [0] l:(XORshiftRLreg x y z)) yes no) && l.Uses==1 => (NE (TEQshiftRLreg x y z) yes no) +(NE (CMPconst [0] l:(XORshiftRAreg x y z)) yes no) && l.Uses==1 => (NE (TEQshiftRAreg x y z) yes no) +(LT (CMPconst [0] l:(SUB x y)) yes no) && l.Uses==1 => (LTnoov (CMP x y) yes no) +(LT (CMPconst [0] l:(MULS x y a)) yes no) && l.Uses==1 => (LTnoov (CMP a (MUL <x.Type> x y)) yes no) +(LT (CMPconst [0] l:(SUBconst [c] x)) yes no) && l.Uses==1 => (LTnoov (CMPconst [c] x) yes no) +(LT (CMPconst [0] l:(SUBshiftLL x y [c])) yes no) && l.Uses==1 => (LTnoov (CMPshiftLL x y [c]) yes no) +(LT (CMPconst [0] l:(SUBshiftRL x y [c])) yes no) && l.Uses==1 => (LTnoov (CMPshiftRL x y [c]) yes no) +(LT (CMPconst [0] l:(SUBshiftRA x y [c])) yes no) && l.Uses==1 => (LTnoov (CMPshiftRA x y [c]) yes no) +(LT (CMPconst [0] l:(SUBshiftLLreg x y z)) yes no) && l.Uses==1 => (LTnoov (CMPshiftLLreg x y z) yes no) +(LT (CMPconst [0] l:(SUBshiftRLreg x y z)) yes no) && l.Uses==1 => (LTnoov (CMPshiftRLreg x y z) yes no) +(LT (CMPconst [0] l:(SUBshiftRAreg x y z)) yes no) && l.Uses==1 => (LTnoov (CMPshiftRAreg x y z) yes no) +(LE (CMPconst [0] l:(SUB x y)) yes no) && l.Uses==1 => (LEnoov (CMP x y) yes no) +(LE (CMPconst [0] l:(MULS x y a)) yes no) && l.Uses==1 => (LEnoov (CMP a (MUL <x.Type> x y)) yes no) +(LE (CMPconst [0] l:(SUBconst [c] x)) yes no) && l.Uses==1 => (LEnoov (CMPconst [c] x) yes no) +(LE (CMPconst [0] l:(SUBshiftLL x y [c])) yes no) && l.Uses==1 => (LEnoov (CMPshiftLL x y [c]) yes no) +(LE (CMPconst [0] l:(SUBshiftRL x y [c])) yes no) && l.Uses==1 => (LEnoov (CMPshiftRL x y [c]) yes no) +(LE (CMPconst [0] l:(SUBshiftRA x y [c])) yes no) && l.Uses==1 => (LEnoov (CMPshiftRA x y [c]) yes no) +(LE (CMPconst [0] l:(SUBshiftLLreg x y z)) yes no) && l.Uses==1 => (LEnoov (CMPshiftLLreg x y z) yes no) +(LE (CMPconst [0] l:(SUBshiftRLreg x y z)) yes no) && l.Uses==1 => (LEnoov (CMPshiftRLreg x y z) yes no) +(LE (CMPconst [0] l:(SUBshiftRAreg x y z)) yes no) && l.Uses==1 => (LEnoov (CMPshiftRAreg x y z) yes no) +(LT (CMPconst [0] l:(ADD x y)) yes no) && l.Uses==1 => (LTnoov (CMN x y) yes no) +(LT (CMPconst [0] l:(MULA x y a)) yes no) && l.Uses==1 => (LTnoov (CMN a (MUL <x.Type> x y)) yes no) +(LT (CMPconst [0] l:(ADDconst [c] x)) yes no) && l.Uses==1 => (LTnoov (CMNconst [c] x) yes no) +(LT (CMPconst [0] l:(ADDshiftLL x y [c])) yes no) && l.Uses==1 => (LTnoov (CMNshiftLL x y [c]) yes no) +(LT (CMPconst [0] l:(ADDshiftRL x y [c])) yes no) && l.Uses==1 => (LTnoov (CMNshiftRL x y [c]) yes no) +(LT (CMPconst [0] l:(ADDshiftRA x y [c])) yes no) && l.Uses==1 => (LTnoov (CMNshiftRA x y [c]) yes no) +(LT (CMPconst [0] l:(ADDshiftLLreg x y z)) yes no) && l.Uses==1 => (LTnoov (CMNshiftLLreg x y z) yes no) +(LT (CMPconst [0] l:(ADDshiftRLreg x y z)) yes no) && l.Uses==1 => (LTnoov (CMNshiftRLreg x y z) yes no) +(LT (CMPconst [0] l:(ADDshiftRAreg x y z)) yes no) && l.Uses==1 => (LTnoov (CMNshiftRAreg x y z) yes no) +(LE (CMPconst [0] l:(ADD x y)) yes no) && l.Uses==1 => (LEnoov (CMN x y) yes no) +(LE (CMPconst [0] l:(MULA x y a)) yes no) && l.Uses==1 => (LEnoov (CMN a (MUL <x.Type> x y)) yes no) +(LE (CMPconst [0] l:(ADDconst [c] x)) yes no) && l.Uses==1 => (LEnoov (CMNconst [c] x) yes no) +(LE (CMPconst [0] l:(ADDshiftLL x y [c])) yes no) && l.Uses==1 => (LEnoov (CMNshiftLL x y [c]) yes no) +(LE (CMPconst [0] l:(ADDshiftRL x y [c])) yes no) && l.Uses==1 => (LEnoov (CMNshiftRL x y [c]) yes no) +(LE (CMPconst [0] l:(ADDshiftRA x y [c])) yes no) && l.Uses==1 => (LEnoov (CMNshiftRA x y [c]) yes no) +(LE (CMPconst [0] l:(ADDshiftLLreg x y z)) yes no) && l.Uses==1 => (LEnoov (CMNshiftLLreg x y z) yes no) +(LE (CMPconst [0] l:(ADDshiftRLreg x y z)) yes no) && l.Uses==1 => (LEnoov (CMNshiftRLreg x y z) yes no) +(LE (CMPconst [0] l:(ADDshiftRAreg x y z)) yes no) && l.Uses==1 => (LEnoov (CMNshiftRAreg x y z) yes no) +(LT (CMPconst [0] l:(AND x y)) yes no) && l.Uses==1 => (LTnoov (TST x y) yes no) +(LT (CMPconst [0] l:(ANDconst [c] x)) yes no) && l.Uses==1 => (LTnoov (TSTconst [c] x) yes no) +(LT (CMPconst [0] l:(ANDshiftLL x y [c])) yes no) && l.Uses==1 => (LTnoov (TSTshiftLL x y [c]) yes no) +(LT (CMPconst [0] l:(ANDshiftRL x y [c])) yes no) && l.Uses==1 => (LTnoov (TSTshiftRL x y [c]) yes no) +(LT (CMPconst [0] l:(ANDshiftRA x y [c])) yes no) && l.Uses==1 => (LTnoov (TSTshiftRA x y [c]) yes no) +(LT (CMPconst [0] l:(ANDshiftLLreg x y z)) yes no) && l.Uses==1 => (LTnoov (TSTshiftLLreg x y z) yes no) +(LT (CMPconst [0] l:(ANDshiftRLreg x y z)) yes no) && l.Uses==1 => (LTnoov (TSTshiftRLreg x y z) yes no) +(LT (CMPconst [0] l:(ANDshiftRAreg x y z)) yes no) && l.Uses==1 => (LTnoov (TSTshiftRAreg x y z) yes no) +(LE (CMPconst [0] l:(AND x y)) yes no) && l.Uses==1 => (LEnoov (TST x y) yes no) +(LE (CMPconst [0] l:(ANDconst [c] x)) yes no) && l.Uses==1 => (LEnoov (TSTconst [c] x) yes no) +(LE (CMPconst [0] l:(ANDshiftLL x y [c])) yes no) && l.Uses==1 => (LEnoov (TSTshiftLL x y [c]) yes no) +(LE (CMPconst [0] l:(ANDshiftRL x y [c])) yes no) && l.Uses==1 => (LEnoov (TSTshiftRL x y [c]) yes no) +(LE (CMPconst [0] l:(ANDshiftRA x y [c])) yes no) && l.Uses==1 => (LEnoov (TSTshiftRA x y [c]) yes no) +(LE (CMPconst [0] l:(ANDshiftLLreg x y z)) yes no) && l.Uses==1 => (LEnoov (TSTshiftLLreg x y z) yes no) +(LE (CMPconst [0] l:(ANDshiftRLreg x y z)) yes no) && l.Uses==1 => (LEnoov (TSTshiftRLreg x y z) yes no) +(LE (CMPconst [0] l:(ANDshiftRAreg x y z)) yes no) && l.Uses==1 => (LEnoov (TSTshiftRAreg x y z) yes no) +(LT (CMPconst [0] l:(XOR x y)) yes no) && l.Uses==1 => (LTnoov (TEQ x y) yes no) +(LT (CMPconst [0] l:(XORconst [c] x)) yes no) && l.Uses==1 => (LTnoov (TEQconst [c] x) yes no) +(LT (CMPconst [0] l:(XORshiftLL x y [c])) yes no) && l.Uses==1 => (LTnoov (TEQshiftLL x y [c]) yes no) +(LT (CMPconst [0] l:(XORshiftRL x y [c])) yes no) && l.Uses==1 => (LTnoov (TEQshiftRL x y [c]) yes no) +(LT (CMPconst [0] l:(XORshiftRA x y [c])) yes no) && l.Uses==1 => (LTnoov (TEQshiftRA x y [c]) yes no) +(LT (CMPconst [0] l:(XORshiftLLreg x y z)) yes no) && l.Uses==1 => (LTnoov (TEQshiftLLreg x y z) yes no) +(LT (CMPconst [0] l:(XORshiftRLreg x y z)) yes no) && l.Uses==1 => (LTnoov (TEQshiftRLreg x y z) yes no) +(LT (CMPconst [0] l:(XORshiftRAreg x y z)) yes no) && l.Uses==1 => (LTnoov (TEQshiftRAreg x y z) yes no) +(LE (CMPconst [0] l:(XOR x y)) yes no) && l.Uses==1 => (LEnoov (TEQ x y) yes no) +(LE (CMPconst [0] l:(XORconst [c] x)) yes no) && l.Uses==1 => (LEnoov (TEQconst [c] x) yes no) +(LE (CMPconst [0] l:(XORshiftLL x y [c])) yes no) && l.Uses==1 => (LEnoov (TEQshiftLL x y [c]) yes no) +(LE (CMPconst [0] l:(XORshiftRL x y [c])) yes no) && l.Uses==1 => (LEnoov (TEQshiftRL x y [c]) yes no) +(LE (CMPconst [0] l:(XORshiftRA x y [c])) yes no) && l.Uses==1 => (LEnoov (TEQshiftRA x y [c]) yes no) +(LE (CMPconst [0] l:(XORshiftLLreg x y z)) yes no) && l.Uses==1 => (LEnoov (TEQshiftLLreg x y z) yes no) +(LE (CMPconst [0] l:(XORshiftRLreg x y z)) yes no) && l.Uses==1 => (LEnoov (TEQshiftRLreg x y z) yes no) +(LE (CMPconst [0] l:(XORshiftRAreg x y z)) yes no) && l.Uses==1 => (LEnoov (TEQshiftRAreg x y z) yes no) +(GT (CMPconst [0] l:(SUB x y)) yes no) && l.Uses==1 => (GTnoov (CMP x y) yes no) +(GT (CMPconst [0] l:(MULS x y a)) yes no) && l.Uses==1 => (GTnoov (CMP a (MUL <x.Type> x y)) yes no) +(GT (CMPconst [0] l:(SUBconst [c] x)) yes no) && l.Uses==1 => (GTnoov (CMPconst [c] x) yes no) +(GT (CMPconst [0] l:(SUBshiftLL x y [c])) yes no) && l.Uses==1 => (GTnoov (CMPshiftLL x y [c]) yes no) +(GT (CMPconst [0] l:(SUBshiftRL x y [c])) yes no) && l.Uses==1 => (GTnoov (CMPshiftRL x y [c]) yes no) +(GT (CMPconst [0] l:(SUBshiftRA x y [c])) yes no) && l.Uses==1 => (GTnoov (CMPshiftRA x y [c]) yes no) +(GT (CMPconst [0] l:(SUBshiftLLreg x y z)) yes no) && l.Uses==1 => (GTnoov (CMPshiftLLreg x y z) yes no) +(GT (CMPconst [0] l:(SUBshiftRLreg x y z)) yes no) && l.Uses==1 => (GTnoov (CMPshiftRLreg x y z) yes no) +(GT (CMPconst [0] l:(SUBshiftRAreg x y z)) yes no) && l.Uses==1 => (GTnoov (CMPshiftRAreg x y z) yes no) +(GE (CMPconst [0] l:(SUB x y)) yes no) && l.Uses==1 => (GEnoov (CMP x y) yes no) +(GE (CMPconst [0] l:(MULS x y a)) yes no) && l.Uses==1 => (GEnoov (CMP a (MUL <x.Type> x y)) yes no) +(GE (CMPconst [0] l:(SUBconst [c] x)) yes no) && l.Uses==1 => (GEnoov (CMPconst [c] x) yes no) +(GE (CMPconst [0] l:(SUBshiftLL x y [c])) yes no) && l.Uses==1 => (GEnoov (CMPshiftLL x y [c]) yes no) +(GE (CMPconst [0] l:(SUBshiftRL x y [c])) yes no) && l.Uses==1 => (GEnoov (CMPshiftRL x y [c]) yes no) +(GE (CMPconst [0] l:(SUBshiftRA x y [c])) yes no) && l.Uses==1 => (GEnoov (CMPshiftRA x y [c]) yes no) +(GE (CMPconst [0] l:(SUBshiftLLreg x y z)) yes no) && l.Uses==1 => (GEnoov (CMPshiftLLreg x y z) yes no) +(GE (CMPconst [0] l:(SUBshiftRLreg x y z)) yes no) && l.Uses==1 => (GEnoov (CMPshiftRLreg x y z) yes no) +(GE (CMPconst [0] l:(SUBshiftRAreg x y z)) yes no) && l.Uses==1 => (GEnoov (CMPshiftRAreg x y z) yes no) +(GT (CMPconst [0] l:(ADD x y)) yes no) && l.Uses==1 => (GTnoov (CMN x y) yes no) +(GT (CMPconst [0] l:(ADDconst [c] x)) yes no) && l.Uses==1 => (GTnoov (CMNconst [c] x) yes no) +(GT (CMPconst [0] l:(ADDshiftLL x y [c])) yes no) && l.Uses==1 => (GTnoov (CMNshiftLL x y [c]) yes no) +(GT (CMPconst [0] l:(ADDshiftRL x y [c])) yes no) && l.Uses==1 => (GTnoov (CMNshiftRL x y [c]) yes no) +(GT (CMPconst [0] l:(ADDshiftRA x y [c])) yes no) && l.Uses==1 => (GTnoov (CMNshiftRA x y [c]) yes no) +(GT (CMPconst [0] l:(ADDshiftLLreg x y z)) yes no) && l.Uses==1 => (GTnoov (CMNshiftLLreg x y z) yes no) +(GT (CMPconst [0] l:(ADDshiftRLreg x y z)) yes no) && l.Uses==1 => (GTnoov (CMNshiftRLreg x y z) yes no) +(GT (CMPconst [0] l:(ADDshiftRAreg x y z)) yes no) && l.Uses==1 => (GTnoov (CMNshiftRAreg x y z) yes no) +(GE (CMPconst [0] l:(ADD x y)) yes no) && l.Uses==1 => (GEnoov (CMN x y) yes no) +(GE (CMPconst [0] l:(MULA x y a)) yes no) && l.Uses==1 => (GEnoov (CMN a (MUL <x.Type> x y)) yes no) +(GE (CMPconst [0] l:(ADDconst [c] x)) yes no) && l.Uses==1 => (GEnoov (CMNconst [c] x) yes no) +(GE (CMPconst [0] l:(ADDshiftLL x y [c])) yes no) && l.Uses==1 => (GEnoov (CMNshiftLL x y [c]) yes no) +(GE (CMPconst [0] l:(ADDshiftRL x y [c])) yes no) && l.Uses==1 => (GEnoov (CMNshiftRL x y [c]) yes no) +(GE (CMPconst [0] l:(ADDshiftRA x y [c])) yes no) && l.Uses==1 => (GEnoov (CMNshiftRA x y [c]) yes no) +(GE (CMPconst [0] l:(ADDshiftLLreg x y z)) yes no) && l.Uses==1 => (GEnoov (CMNshiftLLreg x y z) yes no) +(GE (CMPconst [0] l:(ADDshiftRLreg x y z)) yes no) && l.Uses==1 => (GEnoov (CMNshiftRLreg x y z) yes no) +(GE (CMPconst [0] l:(ADDshiftRAreg x y z)) yes no) && l.Uses==1 => (GEnoov (CMNshiftRAreg x y z) yes no) +(GT (CMPconst [0] l:(MULA x y a)) yes no) && l.Uses==1 => (GTnoov (CMN a (MUL <x.Type> x y)) yes no) +(GT (CMPconst [0] l:(AND x y)) yes no) && l.Uses==1 => (GTnoov (TST x y) yes no) +(GT (CMPconst [0] l:(ANDconst [c] x)) yes no) && l.Uses==1 => (GTnoov (TSTconst [c] x) yes no) +(GT (CMPconst [0] l:(ANDshiftLL x y [c])) yes no) && l.Uses==1 => (GTnoov (TSTshiftLL x y [c]) yes no) +(GT (CMPconst [0] l:(ANDshiftRL x y [c])) yes no) && l.Uses==1 => (GTnoov (TSTshiftRL x y [c]) yes no) +(GT (CMPconst [0] l:(ANDshiftRA x y [c])) yes no) && l.Uses==1 => (GTnoov (TSTshiftRA x y [c]) yes no) +(GT (CMPconst [0] l:(ANDshiftLLreg x y z)) yes no) && l.Uses==1 => (GTnoov (TSTshiftLLreg x y z) yes no) +(GT (CMPconst [0] l:(ANDshiftRLreg x y z)) yes no) && l.Uses==1 => (GTnoov (TSTshiftRLreg x y z) yes no) +(GT (CMPconst [0] l:(ANDshiftRAreg x y z)) yes no) && l.Uses==1 => (GTnoov (TSTshiftRAreg x y z) yes no) +(GE (CMPconst [0] l:(AND x y)) yes no) && l.Uses==1 => (GEnoov (TST x y) yes no) +(GE (CMPconst [0] l:(ANDconst [c] x)) yes no) && l.Uses==1 => (GEnoov (TSTconst [c] x) yes no) +(GE (CMPconst [0] l:(ANDshiftLL x y [c])) yes no) && l.Uses==1 => (GEnoov (TSTshiftLL x y [c]) yes no) +(GE (CMPconst [0] l:(ANDshiftRL x y [c])) yes no) && l.Uses==1 => (GEnoov (TSTshiftRL x y [c]) yes no) +(GE (CMPconst [0] l:(ANDshiftRA x y [c])) yes no) && l.Uses==1 => (GEnoov (TSTshiftRA x y [c]) yes no) +(GE (CMPconst [0] l:(ANDshiftLLreg x y z)) yes no) && l.Uses==1 => (GEnoov (TSTshiftLLreg x y z) yes no) +(GE (CMPconst [0] l:(ANDshiftRLreg x y z)) yes no) && l.Uses==1 => (GEnoov (TSTshiftRLreg x y z) yes no) +(GE (CMPconst [0] l:(ANDshiftRAreg x y z)) yes no) && l.Uses==1 => (GEnoov (TSTshiftRAreg x y z) yes no) +(GT (CMPconst [0] l:(XOR x y)) yes no) && l.Uses==1 => (GTnoov (TEQ x y) yes no) +(GT (CMPconst [0] l:(XORconst [c] x)) yes no) && l.Uses==1 => (GTnoov (TEQconst [c] x) yes no) +(GT (CMPconst [0] l:(XORshiftLL x y [c])) yes no) && l.Uses==1 => (GTnoov (TEQshiftLL x y [c]) yes no) +(GT (CMPconst [0] l:(XORshiftRL x y [c])) yes no) && l.Uses==1 => (GTnoov (TEQshiftRL x y [c]) yes no) +(GT (CMPconst [0] l:(XORshiftRA x y [c])) yes no) && l.Uses==1 => (GTnoov (TEQshiftRA x y [c]) yes no) +(GT (CMPconst [0] l:(XORshiftLLreg x y z)) yes no) && l.Uses==1 => (GTnoov (TEQshiftLLreg x y z) yes no) +(GT (CMPconst [0] l:(XORshiftRLreg x y z)) yes no) && l.Uses==1 => (GTnoov (TEQshiftRLreg x y z) yes no) +(GT (CMPconst [0] l:(XORshiftRAreg x y z)) yes no) && l.Uses==1 => (GTnoov (TEQshiftRAreg x y z) yes no) +(GE (CMPconst [0] l:(XOR x y)) yes no) && l.Uses==1 => (GEnoov (TEQ x y) yes no) +(GE (CMPconst [0] l:(XORconst [c] x)) yes no) && l.Uses==1 => (GEnoov (TEQconst [c] x) yes no) +(GE (CMPconst [0] l:(XORshiftLL x y [c])) yes no) && l.Uses==1 => (GEnoov (TEQshiftLL x y [c]) yes no) +(GE (CMPconst [0] l:(XORshiftRL x y [c])) yes no) && l.Uses==1 => (GEnoov (TEQshiftRL x y [c]) yes no) +(GE (CMPconst [0] l:(XORshiftRA x y [c])) yes no) && l.Uses==1 => (GEnoov (TEQshiftRA x y [c]) yes no) +(GE (CMPconst [0] l:(XORshiftLLreg x y z)) yes no) && l.Uses==1 => (GEnoov (TEQshiftLLreg x y z) yes no) +(GE (CMPconst [0] l:(XORshiftRLreg x y z)) yes no) && l.Uses==1 => (GEnoov (TEQshiftRLreg x y z) yes no) +(GE (CMPconst [0] l:(XORshiftRAreg x y z)) yes no) && l.Uses==1 => (GEnoov (TEQshiftRAreg x y z) yes no) + +(MOVBUload [off] {sym} (SB) _) && symIsRO(sym) => (MOVWconst [int32(read8(sym, int64(off)))]) +(MOVHUload [off] {sym} (SB) _) && symIsRO(sym) => (MOVWconst [int32(read16(sym, int64(off), config.ctxt.Arch.ByteOrder))]) +(MOVWload [off] {sym} (SB) _) && symIsRO(sym) => (MOVWconst [int32(read32(sym, int64(off), config.ctxt.Arch.ByteOrder))]) |