// 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 // negate the result if one operand is negative (Select0 (CALLudiv (SUB (XOR x (Signmask x)) (Signmask x)) // negate x if negative (SUB (XOR y (Signmask y)) (Signmask y)))) // negate y if negative (Signmask (XOR x y))) (Signmask (XOR x y))) (Div32u x y) => (Select0 (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 // negate the result if x is negative (Select1 (CALLudiv (SUB (XOR x (Signmask x)) (Signmask x)) // negate x if negative (SUB (XOR y (Signmask y)) (Signmask y)))) // negate y if negative (Signmask x)) (Signmask x)) (Mod32u x y) => (Select1 (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 x y) => (ADD (SRLconst (SUB 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 ...) (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 x) && objabi.GOARM<=6 => (RSBconst [32] (CLZ (SUBconst (AND x (RSBconst [0] x)) [1]))) (Ctz16 x) && objabi.GOARM<=6 => (RSBconst [32] (CLZ (SUBconst (AND (ORconst [0x10000] x) (RSBconst [0] (ORconst [0x10000] x))) [1]))) (Ctz8 x) && objabi.GOARM<=6 => (RSBconst [32] (CLZ (SUBconst (AND (ORconst [0x100] x) (RSBconst [0] (ORconst [0x100] x))) [1]))) // count trailing zero for ARMv7 (Ctz32 x) && objabi.GOARM==7 => (CLZ (RBIT x)) (Ctz16 x) && objabi.GOARM==7 => (CLZ (RBIT (ORconst [0x10000] x))) (Ctz8 x) && objabi.GOARM==7 => (CLZ (RBIT (ORconst [0x100] x))) // bit length (BitLen32 x) => (RSBconst [32] (CLZ 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 x) && objabi.GOARM==5 => (XOR (SRLconst (BICconst (XOR x (SRRconst [16] x)) [0xff0000]) [8]) (SRRconst x [8])) // byte swap for ARMv6 and above (Bswap32 x) && objabi.GOARM>=6 => (REV x) // boolean ops -- booleans are represented with 0=false, 1=true (AndB ...) => (AND ...) (OrB ...) => (OR ...) (EqB x y) => (XORconst [1] (XOR 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 y) (CMPconst [256] y) [0]) (Lsh32x16 x y) => (CMOVWHSconst (SLL x (ZeroExt16to32 y)) (CMPconst [256] (ZeroExt16to32 y)) [0]) (Lsh32x8 x y) => (SLL x (ZeroExt8to32 y)) (Lsh16x32 x y) => (CMOVWHSconst (SLL x y) (CMPconst [256] y) [0]) (Lsh16x16 x y) => (CMOVWHSconst (SLL x (ZeroExt16to32 y)) (CMPconst [256] (ZeroExt16to32 y)) [0]) (Lsh16x8 x y) => (SLL x (ZeroExt8to32 y)) (Lsh8x32 x y) => (CMOVWHSconst (SLL x y) (CMPconst [256] y) [0]) (Lsh8x16 x y) => (CMOVWHSconst (SLL x (ZeroExt16to32 y)) (CMPconst [256] (ZeroExt16to32 y)) [0]) (Lsh8x8 x y) => (SLL x (ZeroExt8to32 y)) (Rsh32Ux32 x y) => (CMOVWHSconst (SRL x y) (CMPconst [256] y) [0]) (Rsh32Ux16 x y) => (CMOVWHSconst (SRL x (ZeroExt16to32 y)) (CMPconst [256] (ZeroExt16to32 y)) [0]) (Rsh32Ux8 x y) => (SRL x (ZeroExt8to32 y)) (Rsh16Ux32 x y) => (CMOVWHSconst (SRL (ZeroExt16to32 x) y) (CMPconst [256] y) [0]) (Rsh16Ux16 x y) => (CMOVWHSconst (SRL (ZeroExt16to32 x) (ZeroExt16to32 y)) (CMPconst [256] (ZeroExt16to32 y)) [0]) (Rsh16Ux8 x y) => (SRL (ZeroExt16to32 x) (ZeroExt8to32 y)) (Rsh8Ux32 x y) => (CMOVWHSconst (SRL (ZeroExt8to32 x) y) (CMPconst [256] y) [0]) (Rsh8Ux16 x y) => (CMOVWHSconst (SRL (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 x [16]) [int32(c+16)]) (Rsh16Ux64 x (Const64 [c])) && uint64(c) < 16 => (SRLconst (SLLconst 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 x [24]) [int32(c+24)]) (Rsh8Ux64 x (Const64 [c])) && uint64(c) < 8 => (SRLconst (SLLconst 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 x [16]) [31]) (Rsh8x64 x (Const64 [c])) && uint64(c) >= 8 => (SRAconst (SLLconst 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 [b]) => (MOVWconst [b2i32(b)]) // 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 x x [1]) [31]) // sign bit of uint32(x)>>1 - x (Slicemask x) => (SRAconst (RSBconst [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 ptr mem) && t.IsBoolean() => (MOVBUload ptr mem) (Load ptr mem) && (is8BitInt(t) && isSigned(t)) => (MOVBload ptr mem) (Load ptr mem) && (is8BitInt(t) && !isSigned(t)) => (MOVBUload ptr mem) (Load ptr mem) && (is16BitInt(t) && isSigned(t)) => (MOVHload ptr mem) (Load ptr mem) && (is16BitInt(t) && !isSigned(t)) => (MOVHUload ptr mem) (Load ptr mem) && (is32BitInt(t) || isPtr(t)) => (MOVWload ptr mem) (Load ptr mem) && is32BitFloat(t) => (MOVFload ptr mem) (Load 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 [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 [int32(s-moveSize(t.Alignment(), config))]) mem) // calls (StaticCall ...) => (CALLstatic ...) (ClosureCall ...) => (CALLclosure ...) (InterCall ...) => (CALLinter ...) // 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])) => (SLLconst x [c&31]) // Note: I don't think we ever generate bad constant shifts (i.e. c>=32) (SRL x (MOVWconst [c])) => (SRLconst x [c&31]) (SRA x (MOVWconst [c])) => (SRAconst x [c&31]) (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) // Canonicalize the order of arguments to comparisons - helps with CSE. (CMP x y) && x.ID > y.ID => (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) // 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 x [1])) (MUL x (MOVWconst [c])) && c%5 == 0 && isPowerOfTwo32(c/5) => (SLLconst [int32(log32(c/5))] (ADDshiftLL x x [2])) (MUL x (MOVWconst [c])) && c%7 == 0 && isPowerOfTwo32(c/7) => (SLLconst [int32(log32(c/7))] (RSBshiftLL x x [3])) (MUL x (MOVWconst [c])) && c%9 == 0 && isPowerOfTwo32(c/9) => (SLLconst [int32(log32(c/9))] (ADDshiftLL 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 [int32(log32(c))] x) a) (MULA x (MOVWconst [c]) a) && isPowerOfTwo32(c-1) && c >= 3 => (ADD (ADDshiftLL x x [int32(log32(c-1))]) a) (MULA x (MOVWconst [c]) a) && isPowerOfTwo32(c+1) && c >= 7 => (ADD (RSBshiftLL x x [int32(log32(c+1))]) a) (MULA x (MOVWconst [c]) a) && c%3 == 0 && isPowerOfTwo32(c/3) => (ADD (SLLconst [int32(log32(c/3))] (ADDshiftLL x x [1])) a) (MULA x (MOVWconst [c]) a) && c%5 == 0 && isPowerOfTwo32(c/5) => (ADD (SLLconst [int32(log32(c/5))] (ADDshiftLL x x [2])) a) (MULA x (MOVWconst [c]) a) && c%7 == 0 && isPowerOfTwo32(c/7) => (ADD (SLLconst [int32(log32(c/7))] (RSBshiftLL x x [3])) a) (MULA x (MOVWconst [c]) a) && c%9 == 0 && isPowerOfTwo32(c/9) => (ADD (SLLconst [int32(log32(c/9))] (ADDshiftLL 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 [int32(log32(c))] x) a) (MULA (MOVWconst [c]) x a) && isPowerOfTwo32(c-1) && c >= 3 => (ADD (ADDshiftLL x x [int32(log32(c-1))]) a) (MULA (MOVWconst [c]) x a) && isPowerOfTwo32(c+1) && c >= 7 => (ADD (RSBshiftLL x x [int32(log32(c+1))]) a) (MULA (MOVWconst [c]) x a) && c%3 == 0 && isPowerOfTwo32(c/3) => (ADD (SLLconst [int32(log32(c/3))] (ADDshiftLL x x [1])) a) (MULA (MOVWconst [c]) x a) && c%5 == 0 && isPowerOfTwo32(c/5) => (ADD (SLLconst [int32(log32(c/5))] (ADDshiftLL x x [2])) a) (MULA (MOVWconst [c]) x a) && c%7 == 0 && isPowerOfTwo32(c/7) => (ADD (SLLconst [int32(log32(c/7))] (RSBshiftLL x x [3])) a) (MULA (MOVWconst [c]) x a) && c%9 == 0 && isPowerOfTwo32(c/9) => (ADD (SLLconst [int32(log32(c/9))] (ADDshiftLL 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 [int32(log32(c))] x) a) (MULS x (MOVWconst [c]) a) && isPowerOfTwo32(c-1) && c >= 3 => (RSB (ADDshiftLL x x [int32(log32(c-1))]) a) (MULS x (MOVWconst [c]) a) && isPowerOfTwo32(c+1) && c >= 7 => (RSB (RSBshiftLL x x [int32(log32(c+1))]) a) (MULS x (MOVWconst [c]) a) && c%3 == 0 && isPowerOfTwo32(c/3) => (RSB (SLLconst [int32(log32(c/3))] (ADDshiftLL x x [1])) a) (MULS x (MOVWconst [c]) a) && c%5 == 0 && isPowerOfTwo32(c/5) => (RSB (SLLconst [int32(log32(c/5))] (ADDshiftLL x x [2])) a) (MULS x (MOVWconst [c]) a) && c%7 == 0 && isPowerOfTwo32(c/7) => (RSB (SLLconst [int32(log32(c/7))] (RSBshiftLL x x [3])) a) (MULS x (MOVWconst [c]) a) && c%9 == 0 && isPowerOfTwo32(c/9) => (RSB (SLLconst [int32(log32(c/9))] (ADDshiftLL 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 [int32(log32(c))] x) a) (MULS (MOVWconst [c]) x a) && isPowerOfTwo32(c-1) && c >= 3 => (RSB (ADDshiftLL x x [int32(log32(c-1))]) a) (MULS (MOVWconst [c]) x a) && isPowerOfTwo32(c+1) && c >= 7 => (RSB (RSBshiftLL x x [int32(log32(c+1))]) a) (MULS (MOVWconst [c]) x a) && c%3 == 0 && isPowerOfTwo32(c/3) => (RSB (SLLconst [int32(log32(c/3))] (ADDshiftLL x x [1])) a) (MULS (MOVWconst [c]) x a) && c%5 == 0 && isPowerOfTwo32(c/5) => (RSB (SLLconst [int32(log32(c/5))] (ADDshiftLL x x [2])) a) (MULS (MOVWconst [c]) x a) && c%7 == 0 && isPowerOfTwo32(c/7) => (RSB (SLLconst [int32(log32(c/7))] (RSBshiftLL x x [3])) a) (MULS (MOVWconst [c]) x a) && c%9 == 0 && isPowerOfTwo32(c/9) => (RSB (SLLconst [int32(log32(c/9))] (ADDshiftLL 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< (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) && objabi.GOARM==7 && !isARMImmRot(uint32(c)) && uint32(c)>0xffff && uint32(-c)<=0xffff => (SUBconst [-c] x) (SUBconst [c] x) && objabi.GOARM==7 && !isARMImmRot(uint32(c)) && uint32(c)>0xffff && uint32(-c)<=0xffff => (ADDconst [-c] x) (ANDconst [c] x) && objabi.GOARM==7 && !isARMImmRot(uint32(c)) && uint32(c)>0xffff && ^uint32(c)<=0xffff => (BICconst [int32(^uint32(c))] x) (BICconst [c] x) && objabi.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< (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 [d])) (ADDshiftRL (MOVWconst [c]) x [d]) => (ADDconst [c] (SRLconst x [d])) (ADDshiftRA (MOVWconst [c]) x [d]) => (ADDconst [c] (SRAconst x [d])) (ADCshiftLL (MOVWconst [c]) x [d] flags) => (ADCconst [c] (SLLconst x [d]) flags) (ADCshiftRL (MOVWconst [c]) x [d] flags) => (ADCconst [c] (SRLconst x [d]) flags) (ADCshiftRA (MOVWconst [c]) x [d] flags) => (ADCconst [c] (SRAconst x [d]) flags) (ADDSshiftLL (MOVWconst [c]) x [d]) => (ADDSconst [c] (SLLconst x [d])) (ADDSshiftRL (MOVWconst [c]) x [d]) => (ADDSconst [c] (SRLconst x [d])) (ADDSshiftRA (MOVWconst [c]) x [d]) => (ADDSconst [c] (SRAconst x [d])) (SUBshiftLL (MOVWconst [c]) x [d]) => (RSBconst [c] (SLLconst x [d])) (SUBshiftRL (MOVWconst [c]) x [d]) => (RSBconst [c] (SRLconst x [d])) (SUBshiftRA (MOVWconst [c]) x [d]) => (RSBconst [c] (SRAconst x [d])) (SBCshiftLL (MOVWconst [c]) x [d] flags) => (RSCconst [c] (SLLconst x [d]) flags) (SBCshiftRL (MOVWconst [c]) x [d] flags) => (RSCconst [c] (SRLconst x [d]) flags) (SBCshiftRA (MOVWconst [c]) x [d] flags) => (RSCconst [c] (SRAconst x [d]) flags) (SUBSshiftLL (MOVWconst [c]) x [d]) => (RSBSconst [c] (SLLconst x [d])) (SUBSshiftRL (MOVWconst [c]) x [d]) => (RSBSconst [c] (SRLconst x [d])) (SUBSshiftRA (MOVWconst [c]) x [d]) => (RSBSconst [c] (SRAconst x [d])) (RSBshiftLL (MOVWconst [c]) x [d]) => (SUBconst [c] (SLLconst x [d])) (RSBshiftRL (MOVWconst [c]) x [d]) => (SUBconst [c] (SRLconst x [d])) (RSBshiftRA (MOVWconst [c]) x [d]) => (SUBconst [c] (SRAconst x [d])) (RSCshiftLL (MOVWconst [c]) x [d] flags) => (SBCconst [c] (SLLconst x [d]) flags) (RSCshiftRL (MOVWconst [c]) x [d] flags) => (SBCconst [c] (SRLconst x [d]) flags) (RSCshiftRA (MOVWconst [c]) x [d] flags) => (SBCconst [c] (SRAconst x [d]) flags) (RSBSshiftLL (MOVWconst [c]) x [d]) => (SUBSconst [c] (SLLconst x [d])) (RSBSshiftRL (MOVWconst [c]) x [d]) => (SUBSconst [c] (SRLconst x [d])) (RSBSshiftRA (MOVWconst [c]) x [d]) => (SUBSconst [c] (SRAconst x [d])) (ANDshiftLL (MOVWconst [c]) x [d]) => (ANDconst [c] (SLLconst x [d])) (ANDshiftRL (MOVWconst [c]) x [d]) => (ANDconst [c] (SRLconst x [d])) (ANDshiftRA (MOVWconst [c]) x [d]) => (ANDconst [c] (SRAconst x [d])) (ORshiftLL (MOVWconst [c]) x [d]) => (ORconst [c] (SLLconst x [d])) (ORshiftRL (MOVWconst [c]) x [d]) => (ORconst [c] (SRLconst x [d])) (ORshiftRA (MOVWconst [c]) x [d]) => (ORconst [c] (SRAconst x [d])) (XORshiftLL (MOVWconst [c]) x [d]) => (XORconst [c] (SLLconst x [d])) (XORshiftRL (MOVWconst [c]) x [d]) => (XORconst [c] (SRLconst x [d])) (XORshiftRA (MOVWconst [c]) x [d]) => (XORconst [c] (SRAconst x [d])) (XORshiftRR (MOVWconst [c]) x [d]) => (XORconst [c] (SRRconst x [d])) (CMPshiftLL (MOVWconst [c]) x [d]) => (InvertFlags (CMPconst [c] (SLLconst x [d]))) (CMPshiftRL (MOVWconst [c]) x [d]) => (InvertFlags (CMPconst [c] (SRLconst x [d]))) (CMPshiftRA (MOVWconst [c]) x [d]) => (InvertFlags (CMPconst [c] (SRAconst x [d]))) (TSTshiftLL (MOVWconst [c]) x [d]) => (TSTconst [c] (SLLconst x [d])) (TSTshiftRL (MOVWconst [c]) x [d]) => (TSTconst [c] (SRLconst x [d])) (TSTshiftRA (MOVWconst [c]) x [d]) => (TSTconst [c] (SRAconst x [d])) (TEQshiftLL (MOVWconst [c]) x [d]) => (TEQconst [c] (SLLconst x [d])) (TEQshiftRL (MOVWconst [c]) x [d]) => (TEQconst [c] (SRLconst x [d])) (TEQshiftRA (MOVWconst [c]) x [d]) => (TEQconst [c] (SRAconst x [d])) (CMNshiftLL (MOVWconst [c]) x [d]) => (CMNconst [c] (SLLconst x [d])) (CMNshiftRL (MOVWconst [c]) x [d]) => (CMNconst [c] (SRLconst x [d])) (CMNshiftRA (MOVWconst [c]) x [d]) => (CMNconst [c] (SRAconst x [d])) (ADDshiftLLreg (MOVWconst [c]) x y) => (ADDconst [c] (SLL x y)) (ADDshiftRLreg (MOVWconst [c]) x y) => (ADDconst [c] (SRL x y)) (ADDshiftRAreg (MOVWconst [c]) x y) => (ADDconst [c] (SRA x y)) (ADCshiftLLreg (MOVWconst [c]) x y flags) => (ADCconst [c] (SLL x y) flags) (ADCshiftRLreg (MOVWconst [c]) x y flags) => (ADCconst [c] (SRL x y) flags) (ADCshiftRAreg (MOVWconst [c]) x y flags) => (ADCconst [c] (SRA x y) flags) (ADDSshiftLLreg (MOVWconst [c]) x y) => (ADDSconst [c] (SLL x y)) (ADDSshiftRLreg (MOVWconst [c]) x y) => (ADDSconst [c] (SRL x y)) (ADDSshiftRAreg (MOVWconst [c]) x y) => (ADDSconst [c] (SRA x y)) (SUBshiftLLreg (MOVWconst [c]) x y) => (RSBconst [c] (SLL x y)) (SUBshiftRLreg (MOVWconst [c]) x y) => (RSBconst [c] (SRL x y)) (SUBshiftRAreg (MOVWconst [c]) x y) => (RSBconst [c] (SRA x y)) (SBCshiftLLreg (MOVWconst [c]) x y flags) => (RSCconst [c] (SLL x y) flags) (SBCshiftRLreg (MOVWconst [c]) x y flags) => (RSCconst [c] (SRL x y) flags) (SBCshiftRAreg (MOVWconst [c]) x y flags) => (RSCconst [c] (SRA x y) flags) (SUBSshiftLLreg (MOVWconst [c]) x y) => (RSBSconst [c] (SLL x y)) (SUBSshiftRLreg (MOVWconst [c]) x y) => (RSBSconst [c] (SRL x y)) (SUBSshiftRAreg (MOVWconst [c]) x y) => (RSBSconst [c] (SRA x y)) (RSBshiftLLreg (MOVWconst [c]) x y) => (SUBconst [c] (SLL x y)) (RSBshiftRLreg (MOVWconst [c]) x y) => (SUBconst [c] (SRL x y)) (RSBshiftRAreg (MOVWconst [c]) x y) => (SUBconst [c] (SRA x y)) (RSCshiftLLreg (MOVWconst [c]) x y flags) => (SBCconst [c] (SLL x y) flags) (RSCshiftRLreg (MOVWconst [c]) x y flags) => (SBCconst [c] (SRL x y) flags) (RSCshiftRAreg (MOVWconst [c]) x y flags) => (SBCconst [c] (SRA x y) flags) (RSBSshiftLLreg (MOVWconst [c]) x y) => (SUBSconst [c] (SLL x y)) (RSBSshiftRLreg (MOVWconst [c]) x y) => (SUBSconst [c] (SRL x y)) (RSBSshiftRAreg (MOVWconst [c]) x y) => (SUBSconst [c] (SRA x y)) (ANDshiftLLreg (MOVWconst [c]) x y) => (ANDconst [c] (SLL x y)) (ANDshiftRLreg (MOVWconst [c]) x y) => (ANDconst [c] (SRL x y)) (ANDshiftRAreg (MOVWconst [c]) x y) => (ANDconst [c] (SRA x y)) (ORshiftLLreg (MOVWconst [c]) x y) => (ORconst [c] (SLL x y)) (ORshiftRLreg (MOVWconst [c]) x y) => (ORconst [c] (SRL x y)) (ORshiftRAreg (MOVWconst [c]) x y) => (ORconst [c] (SRA x y)) (XORshiftLLreg (MOVWconst [c]) x y) => (XORconst [c] (SLL x y)) (XORshiftRLreg (MOVWconst [c]) x y) => (XORconst [c] (SRL x y)) (XORshiftRAreg (MOVWconst [c]) x y) => (XORconst [c] (SRA x y)) (CMPshiftLLreg (MOVWconst [c]) x y) => (InvertFlags (CMPconst [c] (SLL x y))) (CMPshiftRLreg (MOVWconst [c]) x y) => (InvertFlags (CMPconst [c] (SRL x y))) (CMPshiftRAreg (MOVWconst [c]) x y) => (InvertFlags (CMPconst [c] (SRA x y))) (TSTshiftLLreg (MOVWconst [c]) x y) => (TSTconst [c] (SLL x y)) (TSTshiftRLreg (MOVWconst [c]) x y) => (TSTconst [c] (SRL x y)) (TSTshiftRAreg (MOVWconst [c]) x y) => (TSTconst [c] (SRA x y)) (TEQshiftLLreg (MOVWconst [c]) x y) => (TEQconst [c] (SLL x y)) (TEQshiftRLreg (MOVWconst [c]) x y) => (TEQconst [c] (SRL x y)) (TEQshiftRAreg (MOVWconst [c]) x y) => (TEQconst [c] (SRA x y)) (CMNshiftLLreg (MOVWconst [c]) x y) => (CMNconst [c] (SLL x y)) (CMNshiftRLreg (MOVWconst [c]) x y) => (CMNconst [c] (SRL x y)) (CMNshiftRAreg (MOVWconst [c]) x y) => (CMNconst [c] (SRA x y)) // constant folding in *shift ops (ADDshiftLL x (MOVWconst [c]) [d]) => (ADDconst x [c< (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< (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< (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< (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< (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< (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< (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< (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< (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< (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< (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< (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)< (BICconst x [c< (BICconst x [int32(uint32(c)>>uint64(d))]) (BICshiftRA x (MOVWconst [c]) [d]) => (BICconst x [c>>uint64(d)]) (MVNshiftLL (MOVWconst [c]) [d]) => (MOVWconst [^(c< (MOVWconst [^int32(uint32(c)>>uint64(d))]) (MVNshiftRA (MOVWconst [c]) [d]) => (MOVWconst [int32(c)>>uint64(d)]) (CMPshiftLL x (MOVWconst [c]) [d]) => (CMPconst x [c< (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< (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< (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< (CMNconst x [int32(uint32(c)>>uint64(d))]) (CMNshiftRA x (MOVWconst [c]) [d]) => (CMNconst x [c>>uint64(d)]) (ADDshiftLLreg x y (MOVWconst [c])) => (ADDshiftLL x y [c]) (ADDshiftRLreg x y (MOVWconst [c])) => (ADDshiftRL x y [c]) (ADDshiftRAreg x y (MOVWconst [c])) => (ADDshiftRA x y [c]) (ADCshiftLLreg x y (MOVWconst [c]) flags) => (ADCshiftLL x y [c] flags) (ADCshiftRLreg x y (MOVWconst [c]) flags) => (ADCshiftRL x y [c] flags) (ADCshiftRAreg x y (MOVWconst [c]) flags) => (ADCshiftRA x y [c] flags) (ADDSshiftLLreg x y (MOVWconst [c])) => (ADDSshiftLL x y [c]) (ADDSshiftRLreg x y (MOVWconst [c])) => (ADDSshiftRL x y [c]) (ADDSshiftRAreg x y (MOVWconst [c])) => (ADDSshiftRA x y [c]) (SUBshiftLLreg x y (MOVWconst [c])) => (SUBshiftLL x y [c]) (SUBshiftRLreg x y (MOVWconst [c])) => (SUBshiftRL x y [c]) (SUBshiftRAreg x y (MOVWconst [c])) => (SUBshiftRA x y [c]) (SBCshiftLLreg x y (MOVWconst [c]) flags) => (SBCshiftLL x y [c] flags) (SBCshiftRLreg x y (MOVWconst [c]) flags) => (SBCshiftRL x y [c] flags) (SBCshiftRAreg x y (MOVWconst [c]) flags) => (SBCshiftRA x y [c] flags) (SUBSshiftLLreg x y (MOVWconst [c])) => (SUBSshiftLL x y [c]) (SUBSshiftRLreg x y (MOVWconst [c])) => (SUBSshiftRL x y [c]) (SUBSshiftRAreg x y (MOVWconst [c])) => (SUBSshiftRA x y [c]) (RSBshiftLLreg x y (MOVWconst [c])) => (RSBshiftLL x y [c]) (RSBshiftRLreg x y (MOVWconst [c])) => (RSBshiftRL x y [c]) (RSBshiftRAreg x y (MOVWconst [c])) => (RSBshiftRA x y [c]) (RSCshiftLLreg x y (MOVWconst [c]) flags) => (RSCshiftLL x y [c] flags) (RSCshiftRLreg x y (MOVWconst [c]) flags) => (RSCshiftRL x y [c] flags) (RSCshiftRAreg x y (MOVWconst [c]) flags) => (RSCshiftRA x y [c] flags) (RSBSshiftLLreg x y (MOVWconst [c])) => (RSBSshiftLL x y [c]) (RSBSshiftRLreg x y (MOVWconst [c])) => (RSBSshiftRL x y [c]) (RSBSshiftRAreg x y (MOVWconst [c])) => (RSBSshiftRA x y [c]) (ANDshiftLLreg x y (MOVWconst [c])) => (ANDshiftLL x y [c]) (ANDshiftRLreg x y (MOVWconst [c])) => (ANDshiftRL x y [c]) (ANDshiftRAreg x y (MOVWconst [c])) => (ANDshiftRA x y [c]) (ORshiftLLreg x y (MOVWconst [c])) => (ORshiftLL x y [c]) (ORshiftRLreg x y (MOVWconst [c])) => (ORshiftRL x y [c]) (ORshiftRAreg x y (MOVWconst [c])) => (ORshiftRA x y [c]) (XORshiftLLreg x y (MOVWconst [c])) => (XORshiftLL x y [c]) (XORshiftRLreg x y (MOVWconst [c])) => (XORshiftRL x y [c]) (XORshiftRAreg x y (MOVWconst [c])) => (XORshiftRA x y [c]) (BICshiftLLreg x y (MOVWconst [c])) => (BICshiftLL x y [c]) (BICshiftRLreg x y (MOVWconst [c])) => (BICshiftRL x y [c]) (BICshiftRAreg x y (MOVWconst [c])) => (BICshiftRA x y [c]) (MVNshiftLLreg x (MOVWconst [c])) => (MVNshiftLL x [c]) (MVNshiftRLreg x (MOVWconst [c])) => (MVNshiftRL x [c]) (MVNshiftRAreg x (MOVWconst [c])) => (MVNshiftRA x [c]) (CMPshiftLLreg x y (MOVWconst [c])) => (CMPshiftLL x y [c]) (CMPshiftRLreg x y (MOVWconst [c])) => (CMPshiftRL x y [c]) (CMPshiftRAreg x y (MOVWconst [c])) => (CMPshiftRA x y [c]) (TSTshiftLLreg x y (MOVWconst [c])) => (TSTshiftLL x y [c]) (TSTshiftRLreg x y (MOVWconst [c])) => (TSTshiftRL x y [c]) (TSTshiftRAreg x y (MOVWconst [c])) => (TSTshiftRA x y [c]) (TEQshiftLLreg x y (MOVWconst [c])) => (TEQshiftLL x y [c]) (TEQshiftRLreg x y (MOVWconst [c])) => (TEQshiftRL x y [c]) (TEQshiftRAreg x y (MOVWconst [c])) => (TEQshiftRA x y [c]) (CMNshiftLLreg x y (MOVWconst [c])) => (CMNshiftLL x y [c]) (CMNshiftRLreg x y (MOVWconst [c])) => (CMNshiftRL x y [c]) (CMNshiftRAreg x y (MOVWconst [c])) => (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) (RotateLeft32 x (MOVWconst [c])) => (SRRconst [-c&31] x) (RotateLeft16 x (MOVWconst [c])) => (Or16 (Lsh16x32 x (MOVWconst [c&15])) (Rsh16Ux32 x (MOVWconst [-c&15]))) (RotateLeft8 x (MOVWconst [c])) => (Or8 (Lsh8x32 x (MOVWconst [c&7])) (Rsh8Ux32 x (MOVWconst [-c&7]))) (RotateLeft32 x y) => (SRR x (RSBconst [0] 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) [8] (BFXU [int32(armBFAuxInt(8, 8))] x) x) => (REV16 x) ((ADDshiftLL|ORshiftLL|XORshiftLL) [8] (SRLconst [24] (SLLconst [16] x)) x) && objabi.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)< (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)< (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 (RSBconst [c] x) (RSBconst [d] y)) => (RSBconst [c+d] (ADD 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)) && objabi.GOARM == 7 => (MULS x y a) (RSB (MUL x y) a) && objabi.GOARM == 7 => (MULS x y a) (NEGF (MULF x y)) && objabi.GOARM >= 6 => (NMULF x y) (NEGD (MULD x y)) && objabi.GOARM >= 6 => (NMULD x y) (MULF (NEGF x) y) && objabi.GOARM >= 6 => (NMULF x y) (MULD (NEGD x) y) && objabi.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 && objabi.GOARM >= 6 => (MULAF a x y) (ADDF a (NMULF x y)) && a.Uses == 1 && objabi.GOARM >= 6 => (MULSF a x y) (ADDD a (MULD x y)) && a.Uses == 1 && objabi.GOARM >= 6 => (MULAD a x y) (ADDD a (NMULD x y)) && a.Uses == 1 && objabi.GOARM >= 6 => (MULSD a x y) (SUBF a (MULF x y)) && a.Uses == 1 && objabi.GOARM >= 6 => (MULSF a x y) (SUBF a (NMULF x y)) && a.Uses == 1 && objabi.GOARM >= 6 => (MULAF a x y) (SUBD a (MULD x y)) && a.Uses == 1 && objabi.GOARM >= 6 => (MULSD a x y) (SUBD a (NMULD x y)) && a.Uses == 1 && objabi.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]) && objabi.GOARM==7 && uint64(d)>=uint64(c) && uint64(d)<=31 => (BFX [(d-c)|(32-d)<<8] x) (SRLconst (SLLconst x [c]) [d]) && objabi.GOARM==7 && uint64(d)>=uint64(c) && uint64(d)<=31 => (BFXU [(d-c)|(32-d)<<8] x) // comparison simplification ((LT|LE|EQ|NE|GE|GT) (CMP x (RSBconst [0] y))) => ((LT|LE|EQ|NE|GE|GT) (CMN x y)) // sense of carry bit not preserved ((LT|LE|EQ|NE|GE|GT) (CMN x (RSBconst [0] y))) => ((LT|LE|EQ|NE|GE|GT) (CMP x y)) // sense of carry bit not preserved (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 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 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 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 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 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 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 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 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 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 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 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 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))])