| // Copyright 2015 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. |
| |
| // values are specified using the following format: |
| // (op <type> [auxint] {aux} arg0 arg1 ...) |
| // the type, aux, and auxint fields are optional |
| // on the matching side |
| // - the type, aux, and auxint fields must match if they are specified. |
| // - the first occurrence of a variable defines that variable. Subsequent |
| // uses must match (be == to) the first use. |
| // - v is defined to be the value matched. |
| // - an additional conditional can be provided after the match pattern with "&&". |
| // on the generated side |
| // - the type of the top-level expression is the same as the one on the left-hand side. |
| // - the type of any subexpressions must be specified explicitly (or |
| // be specified in the op's type field). |
| // - auxint will be 0 if not specified. |
| // - aux will be nil if not specified. |
| |
| // blocks are specified using the following format: |
| // (kind controlvalue succ0 succ1 ...) |
| // controlvalue must be "nil" or a value expression |
| // succ* fields must be variables |
| // For now, the generated successors must be a permutation of the matched successors. |
| |
| // constant folding |
| (Trunc16to8 (Const16 [c])) -> (Const8 [int64(int8(c))]) |
| (Trunc32to8 (Const32 [c])) -> (Const8 [int64(int8(c))]) |
| (Trunc32to16 (Const32 [c])) -> (Const16 [int64(int16(c))]) |
| (Trunc64to8 (Const64 [c])) -> (Const8 [int64(int8(c))]) |
| (Trunc64to16 (Const64 [c])) -> (Const16 [int64(int16(c))]) |
| (Trunc64to32 (Const64 [c])) -> (Const32 [int64(int32(c))]) |
| (Cvt64Fto32F (Const64F [c])) -> (Const32F [f2i(float64(i2f32(c)))]) |
| (Cvt32Fto64F (Const32F [c])) -> (Const64F [c]) // c is already a 64 bit float |
| |
| // const negation is currently handled by frontend |
| //(Neg8 (Const8 [c])) -> (Const8 [-c]) |
| //(Neg16 (Const16 [c])) -> (Const16 [-c]) |
| //(Neg32 (Const32 [c])) -> (Const32 [-c]) |
| //(Neg64 (Const64 [c])) -> (Const64 [-c]) |
| //(Neg32F (Const32F [c])) -> (Const32F [f2i(-i2f(c))]) |
| //(Neg64F (Const64F [c])) -> (Const64F [f2i(-i2f(c))]) |
| |
| (Add8 (Const8 [c]) (Const8 [d])) -> (Const8 [int64(int8(c+d))]) |
| (Add16 (Const16 [c]) (Const16 [d])) -> (Const16 [int64(int16(c+d))]) |
| (Add32 (Const32 [c]) (Const32 [d])) -> (Const32 [int64(int32(c+d))]) |
| (Add64 (Const64 [c]) (Const64 [d])) -> (Const64 [c+d]) |
| (Add32F (Const32F [c]) (Const32F [d])) -> |
| (Const32F [f2i(float64(i2f32(c) + i2f32(d)))]) // ensure we combine the operands with 32 bit precision |
| (Add64F (Const64F [c]) (Const64F [d])) -> (Const64F [f2i(i2f(c) + i2f(d))]) |
| (AddPtr <t> x (Const64 [c])) -> (OffPtr <t> x [c]) |
| |
| (Sub8 (Const8 [c]) (Const8 [d])) -> (Const8 [int64(int8(c-d))]) |
| (Sub16 (Const16 [c]) (Const16 [d])) -> (Const16 [int64(int16(c-d))]) |
| (Sub32 (Const32 [c]) (Const32 [d])) -> (Const32 [int64(int32(c-d))]) |
| (Sub64 (Const64 [c]) (Const64 [d])) -> (Const64 [c-d]) |
| (Sub32F (Const32F [c]) (Const32F [d])) -> |
| (Const32F [f2i(float64(i2f32(c) - i2f32(d)))]) |
| (Sub64F (Const64F [c]) (Const64F [d])) -> (Const64F [f2i(i2f(c) - i2f(d))]) |
| |
| (Mul8 (Const8 [c]) (Const8 [d])) -> (Const8 [int64(int8(c*d))]) |
| (Mul16 (Const16 [c]) (Const16 [d])) -> (Const16 [int64(int16(c*d))]) |
| (Mul32 (Const32 [c]) (Const32 [d])) -> (Const32 [int64(int32(c*d))]) |
| (Mul64 (Const64 [c]) (Const64 [d])) -> (Const64 [c*d]) |
| (Mul32F (Const32F [c]) (Const32F [d])) -> |
| (Const32F [f2i(float64(i2f32(c) * i2f32(d)))]) |
| (Mul64F (Const64F [c]) (Const64F [d])) -> (Const64F [f2i(i2f(c) * i2f(d))]) |
| |
| // Convert x * -1 to -x. The front-end catches some but not all of these. |
| (Mul8 (Const8 [-1]) x) -> (Neg8 x) |
| (Mul16 (Const16 [-1]) x) -> (Neg16 x) |
| (Mul32 (Const32 [-1]) x) -> (Neg32 x) |
| (Mul64 (Const64 [-1]) x) -> (Neg64 x) |
| |
| (Mod8 (Const8 [c]) (Const8 [d])) && d != 0 -> (Const8 [int64(int8(c % d))]) |
| (Mod16 (Const16 [c]) (Const16 [d])) && d != 0 -> (Const16 [int64(int16(c % d))]) |
| (Mod32 (Const32 [c]) (Const32 [d])) && d != 0 -> (Const32 [int64(int32(c % d))]) |
| (Mod64 (Const64 [c]) (Const64 [d])) && d != 0 -> (Const64 [c % d]) |
| |
| (Mod8u (Const8 [c]) (Const8 [d])) && d != 0 -> (Const8 [int64(uint8(c) % uint8(d))]) |
| (Mod16u (Const16 [c]) (Const16 [d])) && d != 0 -> (Const16 [int64(uint16(c) % uint16(d))]) |
| (Mod32u (Const32 [c]) (Const32 [d])) && d != 0 -> (Const32 [int64(uint32(c) % uint32(d))]) |
| (Mod64u (Const64 [c]) (Const64 [d])) && d != 0 -> (Const64 [int64(uint64(c) % uint64(d))]) |
| |
| (Lsh64x64 (Const64 [c]) (Const64 [d])) -> (Const64 [c << uint64(d)]) |
| (Rsh64x64 (Const64 [c]) (Const64 [d])) -> (Const64 [c >> uint64(d)]) |
| (Rsh64Ux64 (Const64 [c]) (Const64 [d])) -> (Const64 [int64(uint64(c) >> uint64(d))]) |
| (Lsh32x64 (Const32 [c]) (Const64 [d])) -> (Const32 [int64(int32(c) << uint64(d))]) |
| (Rsh32x64 (Const32 [c]) (Const64 [d])) -> (Const32 [int64(int32(c) >> uint64(d))]) |
| (Rsh32Ux64 (Const32 [c]) (Const64 [d])) -> (Const32 [int64(int32(uint32(c) >> uint64(d)))]) |
| (Lsh16x64 (Const16 [c]) (Const64 [d])) -> (Const16 [int64(int16(c) << uint64(d))]) |
| (Rsh16x64 (Const16 [c]) (Const64 [d])) -> (Const16 [int64(int16(c) >> uint64(d))]) |
| (Rsh16Ux64 (Const16 [c]) (Const64 [d])) -> (Const16 [int64(int16(uint16(c) >> uint64(d)))]) |
| (Lsh8x64 (Const8 [c]) (Const64 [d])) -> (Const8 [int64(int8(c) << uint64(d))]) |
| (Rsh8x64 (Const8 [c]) (Const64 [d])) -> (Const8 [int64(int8(c) >> uint64(d))]) |
| (Rsh8Ux64 (Const8 [c]) (Const64 [d])) -> (Const8 [int64(int8(uint8(c) >> uint64(d)))]) |
| |
| // Fold IsInBounds when the range of the index cannot exceed the limit. |
| (IsInBounds (ZeroExt8to32 _) (Const32 [c])) && (1 << 8) <= c -> (ConstBool [1]) |
| (IsInBounds (ZeroExt8to64 _) (Const64 [c])) && (1 << 8) <= c -> (ConstBool [1]) |
| (IsInBounds (ZeroExt16to32 _) (Const32 [c])) && (1 << 16) <= c -> (ConstBool [1]) |
| (IsInBounds (ZeroExt16to64 _) (Const64 [c])) && (1 << 16) <= c -> (ConstBool [1]) |
| (IsInBounds x x) -> (ConstBool [0]) |
| (IsInBounds (And32 (Const32 [c]) _) (Const32 [d])) && 0 <= c && c < d -> (ConstBool [1]) |
| (IsInBounds (And64 (Const64 [c]) _) (Const64 [d])) && 0 <= c && c < d -> (ConstBool [1]) |
| (IsInBounds (Const32 [c]) (Const32 [d])) -> (ConstBool [b2i(0 <= c && c < d)]) |
| (IsInBounds (Const64 [c]) (Const64 [d])) -> (ConstBool [b2i(0 <= c && c < d)]) |
| // (Mod64u x y) is always between 0 (inclusive) and y (exclusive). |
| (IsInBounds (Mod32u _ y) y) -> (ConstBool [1]) |
| (IsInBounds (Mod64u _ y) y) -> (ConstBool [1]) |
| |
| (IsSliceInBounds x x) -> (ConstBool [1]) |
| (IsSliceInBounds (And32 (Const32 [c]) _) (Const32 [d])) && 0 <= c && c <= d -> (ConstBool [1]) |
| (IsSliceInBounds (And64 (Const64 [c]) _) (Const64 [d])) && 0 <= c && c <= d -> (ConstBool [1]) |
| (IsSliceInBounds (Const32 [0]) _) -> (ConstBool [1]) |
| (IsSliceInBounds (Const64 [0]) _) -> (ConstBool [1]) |
| (IsSliceInBounds (Const32 [c]) (Const32 [d])) -> (ConstBool [b2i(0 <= c && c <= d)]) |
| (IsSliceInBounds (Const64 [c]) (Const64 [d])) -> (ConstBool [b2i(0 <= c && c <= d)]) |
| (IsSliceInBounds (SliceLen x) (SliceCap x)) -> (ConstBool [1]) |
| |
| (Eq64 x x) -> (ConstBool [1]) |
| (Eq32 x x) -> (ConstBool [1]) |
| (Eq16 x x) -> (ConstBool [1]) |
| (Eq8 x x) -> (ConstBool [1]) |
| (EqB (ConstBool [c]) (ConstBool [d])) -> (ConstBool [b2i(c == d)]) |
| (EqB (ConstBool [0]) x) -> (Not x) |
| (EqB (ConstBool [1]) x) -> x |
| |
| (Neq64 x x) -> (ConstBool [0]) |
| (Neq32 x x) -> (ConstBool [0]) |
| (Neq16 x x) -> (ConstBool [0]) |
| (Neq8 x x) -> (ConstBool [0]) |
| (NeqB (ConstBool [c]) (ConstBool [d])) -> (ConstBool [b2i(c != d)]) |
| (NeqB (ConstBool [0]) x) -> x |
| (NeqB (ConstBool [1]) x) -> (Not x) |
| |
| (Eq64 (Const64 <t> [c]) (Add64 (Const64 <t> [d]) x)) -> (Eq64 (Const64 <t> [c-d]) x) |
| (Eq32 (Const32 <t> [c]) (Add32 (Const32 <t> [d]) x)) -> (Eq32 (Const32 <t> [int64(int32(c-d))]) x) |
| (Eq16 (Const16 <t> [c]) (Add16 (Const16 <t> [d]) x)) -> (Eq16 (Const16 <t> [int64(int16(c-d))]) x) |
| (Eq8 (Const8 <t> [c]) (Add8 (Const8 <t> [d]) x)) -> (Eq8 (Const8 <t> [int64(int8(c-d))]) x) |
| |
| (Neq64 (Const64 <t> [c]) (Add64 (Const64 <t> [d]) x)) -> (Neq64 (Const64 <t> [c-d]) x) |
| (Neq32 (Const32 <t> [c]) (Add32 (Const32 <t> [d]) x)) -> (Neq32 (Const32 <t> [int64(int32(c-d))]) x) |
| (Neq16 (Const16 <t> [c]) (Add16 (Const16 <t> [d]) x)) -> (Neq16 (Const16 <t> [int64(int16(c-d))]) x) |
| (Neq8 (Const8 <t> [c]) (Add8 (Const8 <t> [d]) x)) -> (Neq8 (Const8 <t> [int64(int8(c-d))]) x) |
| |
| // canonicalize: swap arguments for commutative operations when one argument is a constant. |
| (Eq64 x (Const64 <t> [c])) && x.Op != OpConst64 -> (Eq64 (Const64 <t> [c]) x) |
| (Eq32 x (Const32 <t> [c])) && x.Op != OpConst32 -> (Eq32 (Const32 <t> [c]) x) |
| (Eq16 x (Const16 <t> [c])) && x.Op != OpConst16 -> (Eq16 (Const16 <t> [c]) x) |
| (Eq8 x (Const8 <t> [c])) && x.Op != OpConst8 -> (Eq8 (Const8 <t> [c]) x) |
| |
| (Neq64 x (Const64 <t> [c])) && x.Op != OpConst64 -> (Neq64 (Const64 <t> [c]) x) |
| (Neq32 x (Const32 <t> [c])) && x.Op != OpConst32 -> (Neq32 (Const32 <t> [c]) x) |
| (Neq16 x (Const16 <t> [c])) && x.Op != OpConst16 -> (Neq16 (Const16 <t> [c]) x) |
| (Neq8 x (Const8 <t> [c])) && x.Op != OpConst8 -> (Neq8 (Const8 <t> [c]) x) |
| |
| // AddPtr is not canonicalized because nilcheck ptr checks the first argument to be non-nil. |
| (Add64 x (Const64 <t> [c])) && x.Op != OpConst64 -> (Add64 (Const64 <t> [c]) x) |
| (Add32 x (Const32 <t> [c])) && x.Op != OpConst32 -> (Add32 (Const32 <t> [c]) x) |
| (Add16 x (Const16 <t> [c])) && x.Op != OpConst16 -> (Add16 (Const16 <t> [c]) x) |
| (Add8 x (Const8 <t> [c])) && x.Op != OpConst8 -> (Add8 (Const8 <t> [c]) x) |
| |
| (Mul64 x (Const64 <t> [c])) && x.Op != OpConst64 -> (Mul64 (Const64 <t> [c]) x) |
| (Mul32 x (Const32 <t> [c])) && x.Op != OpConst32 -> (Mul32 (Const32 <t> [c]) x) |
| (Mul16 x (Const16 <t> [c])) && x.Op != OpConst16 -> (Mul16 (Const16 <t> [c]) x) |
| (Mul8 x (Const8 <t> [c])) && x.Op != OpConst8 -> (Mul8 (Const8 <t> [c]) x) |
| |
| (Sub64 x (Const64 <t> [c])) && x.Op != OpConst64 -> (Add64 (Const64 <t> [-c]) x) |
| (Sub32 x (Const32 <t> [c])) && x.Op != OpConst32 -> (Add32 (Const32 <t> [int64(int32(-c))]) x) |
| (Sub16 x (Const16 <t> [c])) && x.Op != OpConst16 -> (Add16 (Const16 <t> [int64(int16(-c))]) x) |
| (Sub8 x (Const8 <t> [c])) && x.Op != OpConst8 -> (Add8 (Const8 <t> [int64(int8(-c))]) x) |
| |
| (And64 x (Const64 <t> [c])) && x.Op != OpConst64 -> (And64 (Const64 <t> [c]) x) |
| (And32 x (Const32 <t> [c])) && x.Op != OpConst32 -> (And32 (Const32 <t> [c]) x) |
| (And16 x (Const16 <t> [c])) && x.Op != OpConst16 -> (And16 (Const16 <t> [c]) x) |
| (And8 x (Const8 <t> [c])) && x.Op != OpConst8 -> (And8 (Const8 <t> [c]) x) |
| |
| (Or64 x (Const64 <t> [c])) && x.Op != OpConst64 -> (Or64 (Const64 <t> [c]) x) |
| (Or32 x (Const32 <t> [c])) && x.Op != OpConst32 -> (Or32 (Const32 <t> [c]) x) |
| (Or16 x (Const16 <t> [c])) && x.Op != OpConst16 -> (Or16 (Const16 <t> [c]) x) |
| (Or8 x (Const8 <t> [c])) && x.Op != OpConst8 -> (Or8 (Const8 <t> [c]) x) |
| |
| (Xor64 x (Const64 <t> [c])) && x.Op != OpConst64 -> (Xor64 (Const64 <t> [c]) x) |
| (Xor32 x (Const32 <t> [c])) && x.Op != OpConst32 -> (Xor32 (Const32 <t> [c]) x) |
| (Xor16 x (Const16 <t> [c])) && x.Op != OpConst16 -> (Xor16 (Const16 <t> [c]) x) |
| (Xor8 x (Const8 <t> [c])) && x.Op != OpConst8 -> (Xor8 (Const8 <t> [c]) x) |
| |
| // Distribute multiplication c * (d+x) -> c*d + c*x. Useful for: |
| // a[i].b = ...; a[i+1].b = ... |
| (Mul64 (Const64 <t> [c]) (Add64 <t> (Const64 <t> [d]) x)) -> |
| (Add64 (Const64 <t> [c*d]) (Mul64 <t> (Const64 <t> [c]) x)) |
| (Mul32 (Const32 <t> [c]) (Add32 <t> (Const32 <t> [d]) x)) -> |
| (Add32 (Const32 <t> [int64(int32(c*d))]) (Mul32 <t> (Const32 <t> [c]) x)) |
| |
| // rewrite shifts of 8/16/32 bit consts into 64 bit consts to reduce |
| // the number of the other rewrite rules for const shifts |
| (Lsh64x32 <t> x (Const32 [c])) -> (Lsh64x64 x (Const64 <t> [int64(uint32(c))])) |
| (Lsh64x16 <t> x (Const16 [c])) -> (Lsh64x64 x (Const64 <t> [int64(uint16(c))])) |
| (Lsh64x8 <t> x (Const8 [c])) -> (Lsh64x64 x (Const64 <t> [int64(uint8(c))])) |
| (Rsh64x32 <t> x (Const32 [c])) -> (Rsh64x64 x (Const64 <t> [int64(uint32(c))])) |
| (Rsh64x16 <t> x (Const16 [c])) -> (Rsh64x64 x (Const64 <t> [int64(uint16(c))])) |
| (Rsh64x8 <t> x (Const8 [c])) -> (Rsh64x64 x (Const64 <t> [int64(uint8(c))])) |
| (Rsh64Ux32 <t> x (Const32 [c])) -> (Rsh64Ux64 x (Const64 <t> [int64(uint32(c))])) |
| (Rsh64Ux16 <t> x (Const16 [c])) -> (Rsh64Ux64 x (Const64 <t> [int64(uint16(c))])) |
| (Rsh64Ux8 <t> x (Const8 [c])) -> (Rsh64Ux64 x (Const64 <t> [int64(uint8(c))])) |
| |
| (Lsh32x32 <t> x (Const32 [c])) -> (Lsh32x64 x (Const64 <t> [int64(uint32(c))])) |
| (Lsh32x16 <t> x (Const16 [c])) -> (Lsh32x64 x (Const64 <t> [int64(uint16(c))])) |
| (Lsh32x8 <t> x (Const8 [c])) -> (Lsh32x64 x (Const64 <t> [int64(uint8(c))])) |
| (Rsh32x32 <t> x (Const32 [c])) -> (Rsh32x64 x (Const64 <t> [int64(uint32(c))])) |
| (Rsh32x16 <t> x (Const16 [c])) -> (Rsh32x64 x (Const64 <t> [int64(uint16(c))])) |
| (Rsh32x8 <t> x (Const8 [c])) -> (Rsh32x64 x (Const64 <t> [int64(uint8(c))])) |
| (Rsh32Ux32 <t> x (Const32 [c])) -> (Rsh32Ux64 x (Const64 <t> [int64(uint32(c))])) |
| (Rsh32Ux16 <t> x (Const16 [c])) -> (Rsh32Ux64 x (Const64 <t> [int64(uint16(c))])) |
| (Rsh32Ux8 <t> x (Const8 [c])) -> (Rsh32Ux64 x (Const64 <t> [int64(uint8(c))])) |
| |
| (Lsh16x32 <t> x (Const32 [c])) -> (Lsh16x64 x (Const64 <t> [int64(uint32(c))])) |
| (Lsh16x16 <t> x (Const16 [c])) -> (Lsh16x64 x (Const64 <t> [int64(uint16(c))])) |
| (Lsh16x8 <t> x (Const8 [c])) -> (Lsh16x64 x (Const64 <t> [int64(uint8(c))])) |
| (Rsh16x32 <t> x (Const32 [c])) -> (Rsh16x64 x (Const64 <t> [int64(uint32(c))])) |
| (Rsh16x16 <t> x (Const16 [c])) -> (Rsh16x64 x (Const64 <t> [int64(uint16(c))])) |
| (Rsh16x8 <t> x (Const8 [c])) -> (Rsh16x64 x (Const64 <t> [int64(uint8(c))])) |
| (Rsh16Ux32 <t> x (Const32 [c])) -> (Rsh16Ux64 x (Const64 <t> [int64(uint32(c))])) |
| (Rsh16Ux16 <t> x (Const16 [c])) -> (Rsh16Ux64 x (Const64 <t> [int64(uint16(c))])) |
| (Rsh16Ux8 <t> x (Const8 [c])) -> (Rsh16Ux64 x (Const64 <t> [int64(uint8(c))])) |
| |
| (Lsh8x32 <t> x (Const32 [c])) -> (Lsh8x64 x (Const64 <t> [int64(uint32(c))])) |
| (Lsh8x16 <t> x (Const16 [c])) -> (Lsh8x64 x (Const64 <t> [int64(uint16(c))])) |
| (Lsh8x8 <t> x (Const8 [c])) -> (Lsh8x64 x (Const64 <t> [int64(uint8(c))])) |
| (Rsh8x32 <t> x (Const32 [c])) -> (Rsh8x64 x (Const64 <t> [int64(uint32(c))])) |
| (Rsh8x16 <t> x (Const16 [c])) -> (Rsh8x64 x (Const64 <t> [int64(uint16(c))])) |
| (Rsh8x8 <t> x (Const8 [c])) -> (Rsh8x64 x (Const64 <t> [int64(uint8(c))])) |
| (Rsh8Ux32 <t> x (Const32 [c])) -> (Rsh8Ux64 x (Const64 <t> [int64(uint32(c))])) |
| (Rsh8Ux16 <t> x (Const16 [c])) -> (Rsh8Ux64 x (Const64 <t> [int64(uint16(c))])) |
| (Rsh8Ux8 <t> x (Const8 [c])) -> (Rsh8Ux64 x (Const64 <t> [int64(uint8(c))])) |
| |
| // shifts by zero |
| (Lsh64x64 x (Const64 [0])) -> x |
| (Rsh64x64 x (Const64 [0])) -> x |
| (Rsh64Ux64 x (Const64 [0])) -> x |
| (Lsh32x64 x (Const64 [0])) -> x |
| (Rsh32x64 x (Const64 [0])) -> x |
| (Rsh32Ux64 x (Const64 [0])) -> x |
| (Lsh16x64 x (Const64 [0])) -> x |
| (Rsh16x64 x (Const64 [0])) -> x |
| (Rsh16Ux64 x (Const64 [0])) -> x |
| (Lsh8x64 x (Const64 [0])) -> x |
| (Rsh8x64 x (Const64 [0])) -> x |
| (Rsh8Ux64 x (Const64 [0])) -> x |
| |
| // zero shifted. |
| (Lsh64x64 (Const64 [0]) _) -> (Const64 [0]) |
| (Lsh64x32 (Const64 [0]) _) -> (Const64 [0]) |
| (Lsh64x16 (Const64 [0]) _) -> (Const64 [0]) |
| (Lsh64x8 (Const64 [0]) _) -> (Const64 [0]) |
| (Rsh64x64 (Const64 [0]) _) -> (Const64 [0]) |
| (Rsh64x32 (Const64 [0]) _) -> (Const64 [0]) |
| (Rsh64x16 (Const64 [0]) _) -> (Const64 [0]) |
| (Rsh64x8 (Const64 [0]) _) -> (Const64 [0]) |
| (Rsh64Ux64 (Const64 [0]) _) -> (Const64 [0]) |
| (Rsh64Ux32 (Const64 [0]) _) -> (Const64 [0]) |
| (Rsh64Ux16 (Const64 [0]) _) -> (Const64 [0]) |
| (Rsh64Ux8 (Const64 [0]) _) -> (Const64 [0]) |
| (Lsh32x64 (Const32 [0]) _) -> (Const32 [0]) |
| (Lsh32x32 (Const32 [0]) _) -> (Const32 [0]) |
| (Lsh32x16 (Const32 [0]) _) -> (Const32 [0]) |
| (Lsh32x8 (Const32 [0]) _) -> (Const32 [0]) |
| (Rsh32x64 (Const32 [0]) _) -> (Const32 [0]) |
| (Rsh32x32 (Const32 [0]) _) -> (Const32 [0]) |
| (Rsh32x16 (Const32 [0]) _) -> (Const32 [0]) |
| (Rsh32x8 (Const32 [0]) _) -> (Const32 [0]) |
| (Rsh32Ux64 (Const32 [0]) _) -> (Const32 [0]) |
| (Rsh32Ux32 (Const32 [0]) _) -> (Const32 [0]) |
| (Rsh32Ux16 (Const32 [0]) _) -> (Const32 [0]) |
| (Rsh32Ux8 (Const32 [0]) _) -> (Const32 [0]) |
| (Lsh16x64 (Const16 [0]) _) -> (Const16 [0]) |
| (Lsh16x32 (Const16 [0]) _) -> (Const16 [0]) |
| (Lsh16x16 (Const16 [0]) _) -> (Const16 [0]) |
| (Lsh16x8 (Const16 [0]) _) -> (Const16 [0]) |
| (Rsh16x64 (Const16 [0]) _) -> (Const16 [0]) |
| (Rsh16x32 (Const16 [0]) _) -> (Const16 [0]) |
| (Rsh16x16 (Const16 [0]) _) -> (Const16 [0]) |
| (Rsh16x8 (Const16 [0]) _) -> (Const16 [0]) |
| (Rsh16Ux64 (Const16 [0]) _) -> (Const16 [0]) |
| (Rsh16Ux32 (Const16 [0]) _) -> (Const16 [0]) |
| (Rsh16Ux16 (Const16 [0]) _) -> (Const16 [0]) |
| (Rsh16Ux8 (Const16 [0]) _) -> (Const16 [0]) |
| (Lsh8x64 (Const8 [0]) _) -> (Const8 [0]) |
| (Lsh8x32 (Const8 [0]) _) -> (Const8 [0]) |
| (Lsh8x16 (Const8 [0]) _) -> (Const8 [0]) |
| (Lsh8x8 (Const8 [0]) _) -> (Const8 [0]) |
| (Rsh8x64 (Const8 [0]) _) -> (Const8 [0]) |
| (Rsh8x32 (Const8 [0]) _) -> (Const8 [0]) |
| (Rsh8x16 (Const8 [0]) _) -> (Const8 [0]) |
| (Rsh8x8 (Const8 [0]) _) -> (Const8 [0]) |
| (Rsh8Ux64 (Const8 [0]) _) -> (Const8 [0]) |
| (Rsh8Ux32 (Const8 [0]) _) -> (Const8 [0]) |
| (Rsh8Ux16 (Const8 [0]) _) -> (Const8 [0]) |
| (Rsh8Ux8 (Const8 [0]) _) -> (Const8 [0]) |
| |
| // large left shifts of all values, and right shifts of unsigned values |
| (Lsh64x64 _ (Const64 [c])) && uint64(c) >= 64 -> (Const64 [0]) |
| (Rsh64Ux64 _ (Const64 [c])) && uint64(c) >= 64 -> (Const64 [0]) |
| (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]) |
| |
| // combine const shifts |
| (Lsh64x64 <t> (Lsh64x64 x (Const64 [c])) (Const64 [d])) && !uaddOvf(c,d) -> (Lsh64x64 x (Const64 <t> [c+d])) |
| (Lsh32x64 <t> (Lsh32x64 x (Const64 [c])) (Const64 [d])) && !uaddOvf(c,d) -> (Lsh32x64 x (Const64 <t> [c+d])) |
| (Lsh16x64 <t> (Lsh16x64 x (Const64 [c])) (Const64 [d])) && !uaddOvf(c,d) -> (Lsh16x64 x (Const64 <t> [c+d])) |
| (Lsh8x64 <t> (Lsh8x64 x (Const64 [c])) (Const64 [d])) && !uaddOvf(c,d) -> (Lsh8x64 x (Const64 <t> [c+d])) |
| |
| (Rsh64x64 <t> (Rsh64x64 x (Const64 [c])) (Const64 [d])) && !uaddOvf(c,d) -> (Rsh64x64 x (Const64 <t> [c+d])) |
| (Rsh32x64 <t> (Rsh32x64 x (Const64 [c])) (Const64 [d])) && !uaddOvf(c,d) -> (Rsh32x64 x (Const64 <t> [c+d])) |
| (Rsh16x64 <t> (Rsh16x64 x (Const64 [c])) (Const64 [d])) && !uaddOvf(c,d) -> (Rsh16x64 x (Const64 <t> [c+d])) |
| (Rsh8x64 <t> (Rsh8x64 x (Const64 [c])) (Const64 [d])) && !uaddOvf(c,d) -> (Rsh8x64 x (Const64 <t> [c+d])) |
| |
| (Rsh64Ux64 <t> (Rsh64Ux64 x (Const64 [c])) (Const64 [d])) && !uaddOvf(c,d) -> (Rsh64Ux64 x (Const64 <t> [c+d])) |
| (Rsh32Ux64 <t> (Rsh32Ux64 x (Const64 [c])) (Const64 [d])) && !uaddOvf(c,d) -> (Rsh32Ux64 x (Const64 <t> [c+d])) |
| (Rsh16Ux64 <t> (Rsh16Ux64 x (Const64 [c])) (Const64 [d])) && !uaddOvf(c,d) -> (Rsh16Ux64 x (Const64 <t> [c+d])) |
| (Rsh8Ux64 <t> (Rsh8Ux64 x (Const64 [c])) (Const64 [d])) && !uaddOvf(c,d) -> (Rsh8Ux64 x (Const64 <t> [c+d])) |
| |
| // ((x >> c1) << c2) >> c3 |
| (Rsh64Ux64 (Lsh64x64 (Rsh64Ux64 x (Const64 [c1])) (Const64 [c2])) (Const64 [c3])) |
| && uint64(c1) >= uint64(c2) && uint64(c3) >= uint64(c2) && !uaddOvf(c1-c2, c3) |
| -> (Rsh64Ux64 x (Const64 <config.fe.TypeUInt64()> [c1-c2+c3])) |
| (Rsh32Ux64 (Lsh32x64 (Rsh32Ux64 x (Const64 [c1])) (Const64 [c2])) (Const64 [c3])) |
| && uint64(c1) >= uint64(c2) && uint64(c3) >= uint64(c2) && !uaddOvf(c1-c2, c3) |
| -> (Rsh32Ux64 x (Const64 <config.fe.TypeUInt64()> [c1-c2+c3])) |
| (Rsh16Ux64 (Lsh16x64 (Rsh16Ux64 x (Const64 [c1])) (Const64 [c2])) (Const64 [c3])) |
| && uint64(c1) >= uint64(c2) && uint64(c3) >= uint64(c2) && !uaddOvf(c1-c2, c3) |
| -> (Rsh16Ux64 x (Const64 <config.fe.TypeUInt64()> [c1-c2+c3])) |
| (Rsh8Ux64 (Lsh8x64 (Rsh8Ux64 x (Const64 [c1])) (Const64 [c2])) (Const64 [c3])) |
| && uint64(c1) >= uint64(c2) && uint64(c3) >= uint64(c2) && !uaddOvf(c1-c2, c3) |
| -> (Rsh8Ux64 x (Const64 <config.fe.TypeUInt64()> [c1-c2+c3])) |
| |
| // ((x << c1) >> c2) << c3 |
| (Lsh64x64 (Rsh64Ux64 (Lsh64x64 x (Const64 [c1])) (Const64 [c2])) (Const64 [c3])) |
| && uint64(c1) >= uint64(c2) && uint64(c3) >= uint64(c2) && !uaddOvf(c1-c2, c3) |
| -> (Lsh64x64 x (Const64 <config.fe.TypeUInt64()> [c1-c2+c3])) |
| (Lsh32x64 (Rsh32Ux64 (Lsh32x64 x (Const64 [c1])) (Const64 [c2])) (Const64 [c3])) |
| && uint64(c1) >= uint64(c2) && uint64(c3) >= uint64(c2) && !uaddOvf(c1-c2, c3) |
| -> (Lsh32x64 x (Const64 <config.fe.TypeUInt64()> [c1-c2+c3])) |
| (Lsh16x64 (Rsh16Ux64 (Lsh16x64 x (Const64 [c1])) (Const64 [c2])) (Const64 [c3])) |
| && uint64(c1) >= uint64(c2) && uint64(c3) >= uint64(c2) && !uaddOvf(c1-c2, c3) |
| -> (Lsh16x64 x (Const64 <config.fe.TypeUInt64()> [c1-c2+c3])) |
| (Lsh8x64 (Rsh8Ux64 (Lsh8x64 x (Const64 [c1])) (Const64 [c2])) (Const64 [c3])) |
| && uint64(c1) >= uint64(c2) && uint64(c3) >= uint64(c2) && !uaddOvf(c1-c2, c3) |
| -> (Lsh8x64 x (Const64 <config.fe.TypeUInt64()> [c1-c2+c3])) |
| |
| // constant comparisons |
| (Eq64 (Const64 [c]) (Const64 [d])) -> (ConstBool [b2i(c == d)]) |
| (Eq32 (Const32 [c]) (Const32 [d])) -> (ConstBool [b2i(c == d)]) |
| (Eq16 (Const16 [c]) (Const16 [d])) -> (ConstBool [b2i(c == d)]) |
| (Eq8 (Const8 [c]) (Const8 [d])) -> (ConstBool [b2i(c == d)]) |
| |
| (Neq64 (Const64 [c]) (Const64 [d])) -> (ConstBool [b2i(c != d)]) |
| (Neq32 (Const32 [c]) (Const32 [d])) -> (ConstBool [b2i(c != d)]) |
| (Neq16 (Const16 [c]) (Const16 [d])) -> (ConstBool [b2i(c != d)]) |
| (Neq8 (Const8 [c]) (Const8 [d])) -> (ConstBool [b2i(c != d)]) |
| |
| (Greater64 (Const64 [c]) (Const64 [d])) -> (ConstBool [b2i(c > d)]) |
| (Greater32 (Const32 [c]) (Const32 [d])) -> (ConstBool [b2i(c > d)]) |
| (Greater16 (Const16 [c]) (Const16 [d])) -> (ConstBool [b2i(c > d)]) |
| (Greater8 (Const8 [c]) (Const8 [d])) -> (ConstBool [b2i(c > d)]) |
| |
| (Greater64U (Const64 [c]) (Const64 [d])) -> (ConstBool [b2i(uint64(c) > uint64(d))]) |
| (Greater32U (Const32 [c]) (Const32 [d])) -> (ConstBool [b2i(uint32(c) > uint32(d))]) |
| (Greater16U (Const16 [c]) (Const16 [d])) -> (ConstBool [b2i(uint16(c) > uint16(d))]) |
| (Greater8U (Const8 [c]) (Const8 [d])) -> (ConstBool [b2i(uint8(c) > uint8(d))]) |
| |
| (Geq64 (Const64 [c]) (Const64 [d])) -> (ConstBool [b2i(c >= d)]) |
| (Geq32 (Const32 [c]) (Const32 [d])) -> (ConstBool [b2i(c >= d)]) |
| (Geq16 (Const16 [c]) (Const16 [d])) -> (ConstBool [b2i(c >= d)]) |
| (Geq8 (Const8 [c]) (Const8 [d])) -> (ConstBool [b2i(c >= d)]) |
| |
| (Geq64U (Const64 [c]) (Const64 [d])) -> (ConstBool [b2i(uint64(c) >= uint64(d))]) |
| (Geq32U (Const32 [c]) (Const32 [d])) -> (ConstBool [b2i(uint32(c) >= uint32(d))]) |
| (Geq16U (Const16 [c]) (Const16 [d])) -> (ConstBool [b2i(uint16(c) >= uint16(d))]) |
| (Geq8U (Const8 [c]) (Const8 [d])) -> (ConstBool [b2i(uint8(c) >= uint8(d))]) |
| |
| (Less64 (Const64 [c]) (Const64 [d])) -> (ConstBool [b2i(c < d)]) |
| (Less32 (Const32 [c]) (Const32 [d])) -> (ConstBool [b2i(c < d)]) |
| (Less16 (Const16 [c]) (Const16 [d])) -> (ConstBool [b2i(c < d)]) |
| (Less8 (Const8 [c]) (Const8 [d])) -> (ConstBool [b2i(c < d)]) |
| |
| (Less64U (Const64 [c]) (Const64 [d])) -> (ConstBool [b2i(uint64(c) < uint64(d))]) |
| (Less32U (Const32 [c]) (Const32 [d])) -> (ConstBool [b2i(uint32(c) < uint32(d))]) |
| (Less16U (Const16 [c]) (Const16 [d])) -> (ConstBool [b2i(uint16(c) < uint16(d))]) |
| (Less8U (Const8 [c]) (Const8 [d])) -> (ConstBool [b2i(uint8(c) < uint8(d))]) |
| |
| (Leq64 (Const64 [c]) (Const64 [d])) -> (ConstBool [b2i(c <= d)]) |
| (Leq32 (Const32 [c]) (Const32 [d])) -> (ConstBool [b2i(c <= d)]) |
| (Leq16 (Const16 [c]) (Const16 [d])) -> (ConstBool [b2i(c <= d)]) |
| (Leq8 (Const8 [c]) (Const8 [d])) -> (ConstBool [b2i(c <= d)]) |
| |
| (Leq64U (Const64 [c]) (Const64 [d])) -> (ConstBool [b2i(uint64(c) <= uint64(d))]) |
| (Leq32U (Const32 [c]) (Const32 [d])) -> (ConstBool [b2i(uint32(c) <= uint32(d))]) |
| (Leq16U (Const16 [c]) (Const16 [d])) -> (ConstBool [b2i(uint16(c) <= uint16(d))]) |
| (Leq8U (Const8 [c]) (Const8 [d])) -> (ConstBool [b2i(uint8(c) <= uint8(d))]) |
| |
| // simplifications |
| (Or64 x x) -> x |
| (Or32 x x) -> x |
| (Or16 x x) -> x |
| (Or8 x x) -> x |
| (Or64 (Const64 [0]) x) -> x |
| (Or32 (Const32 [0]) x) -> x |
| (Or16 (Const16 [0]) x) -> x |
| (Or8 (Const8 [0]) x) -> x |
| (Or64 (Const64 [-1]) _) -> (Const64 [-1]) |
| (Or32 (Const32 [-1]) _) -> (Const32 [-1]) |
| (Or16 (Const16 [-1]) _) -> (Const16 [-1]) |
| (Or8 (Const8 [-1]) _) -> (Const8 [-1]) |
| (And64 x x) -> x |
| (And32 x x) -> x |
| (And16 x x) -> x |
| (And8 x x) -> x |
| (And64 (Const64 [-1]) x) -> x |
| (And32 (Const32 [-1]) x) -> x |
| (And16 (Const16 [-1]) x) -> x |
| (And8 (Const8 [-1]) x) -> x |
| (And64 (Const64 [0]) _) -> (Const64 [0]) |
| (And32 (Const32 [0]) _) -> (Const32 [0]) |
| (And16 (Const16 [0]) _) -> (Const16 [0]) |
| (And8 (Const8 [0]) _) -> (Const8 [0]) |
| (Xor64 x x) -> (Const64 [0]) |
| (Xor32 x x) -> (Const32 [0]) |
| (Xor16 x x) -> (Const16 [0]) |
| (Xor8 x x) -> (Const8 [0]) |
| (Xor64 (Const64 [0]) x) -> x |
| (Xor32 (Const32 [0]) x) -> x |
| (Xor16 (Const16 [0]) x) -> x |
| (Xor8 (Const8 [0]) x) -> x |
| (Add64 (Const64 [0]) x) -> x |
| (Add32 (Const32 [0]) x) -> x |
| (Add16 (Const16 [0]) x) -> x |
| (Add8 (Const8 [0]) x) -> x |
| (Sub64 x x) -> (Const64 [0]) |
| (Sub32 x x) -> (Const32 [0]) |
| (Sub16 x x) -> (Const16 [0]) |
| (Sub8 x x) -> (Const8 [0]) |
| (Mul64 (Const64 [0]) _) -> (Const64 [0]) |
| (Mul32 (Const32 [0]) _) -> (Const32 [0]) |
| (Mul16 (Const16 [0]) _) -> (Const16 [0]) |
| (Mul8 (Const8 [0]) _) -> (Const8 [0]) |
| (Com8 (Com8 x)) -> x |
| (Com16 (Com16 x)) -> x |
| (Com32 (Com32 x)) -> x |
| (Com64 (Com64 x)) -> x |
| (Neg8 (Sub8 x y)) -> (Sub8 y x) |
| (Neg16 (Sub16 x y)) -> (Sub16 y x) |
| (Neg32 (Sub32 x y)) -> (Sub32 y x) |
| (Neg64 (Sub64 x y)) -> (Sub64 y x) |
| |
| (And64 x (And64 x y)) -> (And64 x y) |
| (And32 x (And32 x y)) -> (And32 x y) |
| (And16 x (And16 x y)) -> (And16 x y) |
| (And8 x (And8 x y)) -> (And8 x y) |
| (And64 x (And64 y x)) -> (And64 x y) |
| (And32 x (And32 y x)) -> (And32 x y) |
| (And16 x (And16 y x)) -> (And16 x y) |
| (And8 x (And8 y x)) -> (And8 x y) |
| (And64 (And64 x y) x) -> (And64 x y) |
| (And32 (And32 x y) x) -> (And32 x y) |
| (And16 (And16 x y) x) -> (And16 x y) |
| (And8 (And8 x y) x) -> (And8 x y) |
| (And64 (And64 x y) y) -> (And64 x y) |
| (And32 (And32 x y) y) -> (And32 x y) |
| (And16 (And16 x y) y) -> (And16 x y) |
| (And8 (And8 x y) y) -> (And8 x y) |
| (Or64 x (Or64 x y)) -> (Or64 x y) |
| (Or32 x (Or32 x y)) -> (Or32 x y) |
| (Or16 x (Or16 x y)) -> (Or16 x y) |
| (Or8 x (Or8 x y)) -> (Or8 x y) |
| (Or64 x (Or64 y x)) -> (Or64 x y) |
| (Or32 x (Or32 y x)) -> (Or32 x y) |
| (Or16 x (Or16 y x)) -> (Or16 x y) |
| (Or8 x (Or8 y x)) -> (Or8 x y) |
| (Or64 (Or64 x y) x) -> (Or64 x y) |
| (Or32 (Or32 x y) x) -> (Or32 x y) |
| (Or16 (Or16 x y) x) -> (Or16 x y) |
| (Or8 (Or8 x y) x) -> (Or8 x y) |
| (Or64 (Or64 x y) y) -> (Or64 x y) |
| (Or32 (Or32 x y) y) -> (Or32 x y) |
| (Or16 (Or16 x y) y) -> (Or16 x y) |
| (Or8 (Or8 x y) y) -> (Or8 x y) |
| (Xor64 x (Xor64 x y)) -> y |
| (Xor32 x (Xor32 x y)) -> y |
| (Xor16 x (Xor16 x y)) -> y |
| (Xor8 x (Xor8 x y)) -> y |
| (Xor64 x (Xor64 y x)) -> y |
| (Xor32 x (Xor32 y x)) -> y |
| (Xor16 x (Xor16 y x)) -> y |
| (Xor8 x (Xor8 y x)) -> y |
| (Xor64 (Xor64 x y) x) -> y |
| (Xor32 (Xor32 x y) x) -> y |
| (Xor16 (Xor16 x y) x) -> y |
| (Xor8 (Xor8 x y) x) -> y |
| (Xor64 (Xor64 x y) y) -> x |
| (Xor32 (Xor32 x y) y) -> x |
| (Xor16 (Xor16 x y) y) -> x |
| (Xor8 (Xor8 x y) y) -> x |
| |
| (Trunc64to8 (And64 (Const64 [y]) x)) && y&0xFF == 0xFF -> (Trunc64to8 x) |
| (Trunc64to16 (And64 (Const64 [y]) x)) && y&0xFFFF == 0xFFFF -> (Trunc64to16 x) |
| (Trunc64to32 (And64 (Const64 [y]) x)) && y&0xFFFFFFFF == 0xFFFFFFFF -> (Trunc64to32 x) |
| (Trunc32to8 (And32 (Const32 [y]) x)) && y&0xFF == 0xFF -> (Trunc32to8 x) |
| (Trunc32to16 (And32 (Const32 [y]) x)) && y&0xFFFF == 0xFFFF -> (Trunc32to16 x) |
| (Trunc16to8 (And16 (Const16 [y]) x)) && y&0xFF == 0xFF -> (Trunc16to8 x) |
| |
| // Rewrite AND of consts as shifts if possible, slightly faster for 64 bit operands |
| // leading zeros can be shifted left, then right |
| (And64 <t> (Const64 [y]) x) && nlz(y) + nto(y) == 64 && nto(y) >= 32 |
| -> (Rsh64Ux64 (Lsh64x64 <t> x (Const64 <t> [nlz(y)])) (Const64 <t> [nlz(y)])) |
| // trailing zeros can be shifted right, then left |
| (And64 <t> (Const64 [y]) x) && nlo(y) + ntz(y) == 64 && ntz(y) >= 32 |
| -> (Lsh64x64 (Rsh64Ux64 <t> x (Const64 <t> [ntz(y)])) (Const64 <t> [ntz(y)])) |
| |
| // simplifications often used for lengths. e.g. len(s[i:i+5])==5 |
| (Sub64 (Add64 x y) x) -> y |
| (Sub64 (Add64 x y) y) -> x |
| (Sub32 (Add32 x y) x) -> y |
| (Sub32 (Add32 x y) y) -> x |
| (Sub16 (Add16 x y) x) -> y |
| (Sub16 (Add16 x y) y) -> x |
| (Sub8 (Add8 x y) x) -> y |
| (Sub8 (Add8 x y) y) -> x |
| |
| // basic phi simplifications |
| (Phi (Const8 [c]) (Const8 [c])) -> (Const8 [c]) |
| (Phi (Const16 [c]) (Const16 [c])) -> (Const16 [c]) |
| (Phi (Const32 [c]) (Const32 [c])) -> (Const32 [c]) |
| (Phi (Const64 [c]) (Const64 [c])) -> (Const64 [c]) |
| |
| // user nil checks |
| (NeqPtr p (ConstNil)) -> (IsNonNil p) |
| (NeqPtr (ConstNil) p) -> (IsNonNil p) |
| (EqPtr p (ConstNil)) -> (Not (IsNonNil p)) |
| (EqPtr (ConstNil) p) -> (Not (IsNonNil p)) |
| |
| // slice and interface comparisons |
| // The frontend ensures that we can only compare against nil, |
| // so we need only compare the first word (interface type or slice ptr). |
| (EqInter x y) -> (EqPtr (ITab x) (ITab y)) |
| (NeqInter x y) -> (NeqPtr (ITab x) (ITab y)) |
| (EqSlice x y) -> (EqPtr (SlicePtr x) (SlicePtr y)) |
| (NeqSlice x y) -> (NeqPtr (SlicePtr x) (SlicePtr y)) |
| |
| // Load of store of same address, with compatibly typed value and same size |
| (Load <t1> p1 (Store [w] p2 x _)) && isSamePtr(p1,p2) && t1.Compare(x.Type)==CMPeq && w == t1.Size() -> x |
| |
| // Collapse OffPtr |
| (OffPtr (OffPtr p [b]) [a]) -> (OffPtr p [a+b]) |
| (OffPtr p [0]) && v.Type.Compare(p.Type) == CMPeq -> p |
| |
| // indexing operations |
| // Note: bounds check has already been done |
| (ArrayIndex <t> [0] x:(Load ptr mem)) -> @x.Block (Load <t> ptr mem) |
| (PtrIndex <t> ptr idx) && config.PtrSize == 4 -> (AddPtr ptr (Mul32 <config.fe.TypeInt()> idx (Const32 <config.fe.TypeInt()> [t.ElemType().Size()]))) |
| (PtrIndex <t> ptr idx) && config.PtrSize == 8 -> (AddPtr ptr (Mul64 <config.fe.TypeInt()> idx (Const64 <config.fe.TypeInt()> [t.ElemType().Size()]))) |
| |
| // struct operations |
| (StructSelect (StructMake1 x)) -> x |
| (StructSelect [0] (StructMake2 x _)) -> x |
| (StructSelect [1] (StructMake2 _ x)) -> x |
| (StructSelect [0] (StructMake3 x _ _)) -> x |
| (StructSelect [1] (StructMake3 _ x _)) -> x |
| (StructSelect [2] (StructMake3 _ _ x)) -> x |
| (StructSelect [0] (StructMake4 x _ _ _)) -> x |
| (StructSelect [1] (StructMake4 _ x _ _)) -> x |
| (StructSelect [2] (StructMake4 _ _ x _)) -> x |
| (StructSelect [3] (StructMake4 _ _ _ x)) -> x |
| |
| (Load <t> _ _) && t.IsStruct() && t.NumFields() == 0 && config.fe.CanSSA(t) -> |
| (StructMake0) |
| (Load <t> ptr mem) && t.IsStruct() && t.NumFields() == 1 && config.fe.CanSSA(t) -> |
| (StructMake1 |
| (Load <t.FieldType(0)> ptr mem)) |
| (Load <t> ptr mem) && t.IsStruct() && t.NumFields() == 2 && config.fe.CanSSA(t) -> |
| (StructMake2 |
| (Load <t.FieldType(0)> ptr mem) |
| (Load <t.FieldType(1)> (OffPtr <t.FieldType(1).PtrTo()> [t.FieldOff(1)] ptr) mem)) |
| (Load <t> ptr mem) && t.IsStruct() && t.NumFields() == 3 && config.fe.CanSSA(t) -> |
| (StructMake3 |
| (Load <t.FieldType(0)> ptr mem) |
| (Load <t.FieldType(1)> (OffPtr <t.FieldType(1).PtrTo()> [t.FieldOff(1)] ptr) mem) |
| (Load <t.FieldType(2)> (OffPtr <t.FieldType(2).PtrTo()> [t.FieldOff(2)] ptr) mem)) |
| (Load <t> ptr mem) && t.IsStruct() && t.NumFields() == 4 && config.fe.CanSSA(t) -> |
| (StructMake4 |
| (Load <t.FieldType(0)> ptr mem) |
| (Load <t.FieldType(1)> (OffPtr <t.FieldType(1).PtrTo()> [t.FieldOff(1)] ptr) mem) |
| (Load <t.FieldType(2)> (OffPtr <t.FieldType(2).PtrTo()> [t.FieldOff(2)] ptr) mem) |
| (Load <t.FieldType(3)> (OffPtr <t.FieldType(3).PtrTo()> [t.FieldOff(3)] ptr) mem)) |
| |
| (StructSelect [i] x:(Load <t> ptr mem)) && !config.fe.CanSSA(t) -> |
| @x.Block (Load <v.Type> (OffPtr <v.Type.PtrTo()> [t.FieldOff(int(i))] ptr) mem) |
| |
| (Store _ (StructMake0) mem) -> mem |
| (Store dst (StructMake1 <t> f0) mem) -> |
| (Store [t.FieldType(0).Size()] dst f0 mem) |
| (Store dst (StructMake2 <t> f0 f1) mem) -> |
| (Store [t.FieldType(1).Size()] |
| (OffPtr <t.FieldType(1).PtrTo()> [t.FieldOff(1)] dst) |
| f1 |
| (Store [t.FieldType(0).Size()] dst f0 mem)) |
| (Store dst (StructMake3 <t> f0 f1 f2) mem) -> |
| (Store [t.FieldType(2).Size()] |
| (OffPtr <t.FieldType(2).PtrTo()> [t.FieldOff(2)] dst) |
| f2 |
| (Store [t.FieldType(1).Size()] |
| (OffPtr <t.FieldType(1).PtrTo()> [t.FieldOff(1)] dst) |
| f1 |
| (Store [t.FieldType(0).Size()] dst f0 mem))) |
| (Store dst (StructMake4 <t> f0 f1 f2 f3) mem) -> |
| (Store [t.FieldType(3).Size()] |
| (OffPtr <t.FieldType(3).PtrTo()> [t.FieldOff(3)] dst) |
| f3 |
| (Store [t.FieldType(2).Size()] |
| (OffPtr <t.FieldType(2).PtrTo()> [t.FieldOff(2)] dst) |
| f2 |
| (Store [t.FieldType(1).Size()] |
| (OffPtr <t.FieldType(1).PtrTo()> [t.FieldOff(1)] dst) |
| f1 |
| (Store [t.FieldType(0).Size()] dst f0 mem)))) |
| |
| // un-SSAable values use mem->mem copies |
| (Store [size] dst (Load <t> src mem) mem) && !config.fe.CanSSA(t) -> |
| (Move [MakeSizeAndAlign(size, t.Alignment()).Int64()] dst src mem) |
| (Store [size] dst (Load <t> src mem) (VarDef {x} mem)) && !config.fe.CanSSA(t) -> |
| (Move [MakeSizeAndAlign(size, t.Alignment()).Int64()] dst src (VarDef {x} mem)) |
| |
| // string ops |
| // Decomposing StringMake and lowering of StringPtr and StringLen |
| // happens in a later pass, dec, so that these operations are available |
| // to other passes for optimizations. |
| (StringPtr (StringMake (Const64 <t> [c]) _)) -> (Const64 <t> [c]) |
| (StringLen (StringMake _ (Const64 <t> [c]))) -> (Const64 <t> [c]) |
| (ConstString {s}) && config.PtrSize == 4 && s.(string) == "" -> |
| (StringMake (ConstNil) (Const32 <config.fe.TypeInt()> [0])) |
| (ConstString {s}) && config.PtrSize == 8 && s.(string) == "" -> |
| (StringMake (ConstNil) (Const64 <config.fe.TypeInt()> [0])) |
| (ConstString {s}) && config.PtrSize == 4 && s.(string) != "" -> |
| (StringMake |
| (Addr <config.fe.TypeBytePtr()> {config.fe.StringData(s.(string))} |
| (SB)) |
| (Const32 <config.fe.TypeInt()> [int64(len(s.(string)))])) |
| (ConstString {s}) && config.PtrSize == 8 && s.(string) != "" -> |
| (StringMake |
| (Addr <config.fe.TypeBytePtr()> {config.fe.StringData(s.(string))} |
| (SB)) |
| (Const64 <config.fe.TypeInt()> [int64(len(s.(string)))])) |
| |
| // slice ops |
| // Only a few slice rules are provided here. See dec.rules for |
| // a more comprehensive set. |
| (SliceLen (SliceMake _ (Const64 <t> [c]) _)) -> (Const64 <t> [c]) |
| (SliceCap (SliceMake _ _ (Const64 <t> [c]))) -> (Const64 <t> [c]) |
| (SlicePtr (SliceMake (SlicePtr x) _ _)) -> (SlicePtr x) |
| (SliceLen (SliceMake _ (SliceLen x) _)) -> (SliceLen x) |
| (SliceCap (SliceMake _ _ (SliceCap x))) -> (SliceCap x) |
| (SliceCap (SliceMake _ _ (SliceLen x))) -> (SliceLen x) |
| (ConstSlice) && config.PtrSize == 4 -> |
| (SliceMake |
| (ConstNil <v.Type.ElemType().PtrTo()>) |
| (Const32 <config.fe.TypeInt()> [0]) |
| (Const32 <config.fe.TypeInt()> [0])) |
| (ConstSlice) && config.PtrSize == 8 -> |
| (SliceMake |
| (ConstNil <v.Type.ElemType().PtrTo()>) |
| (Const64 <config.fe.TypeInt()> [0]) |
| (Const64 <config.fe.TypeInt()> [0])) |
| |
| // interface ops |
| (ConstInterface) -> |
| (IMake |
| (ConstNil <config.fe.TypeBytePtr()>) |
| (ConstNil <config.fe.TypeBytePtr()>)) |
| |
| (Check (NilCheck (GetG _) _) next) -> (Plain nil next) |
| |
| (If (Not cond) yes no) -> (If cond no yes) |
| (If (ConstBool [c]) yes no) && c == 1 -> (First nil yes no) |
| (If (ConstBool [c]) yes no) && c == 0 -> (First nil no yes) |
| |
| // Get rid of Convert ops for pointer arithmetic on unsafe.Pointer. |
| (Convert (Add64 (Convert ptr mem) off) mem) -> (Add64 ptr off) |
| (Convert (Add64 off (Convert ptr mem)) mem) -> (Add64 ptr off) |
| (Convert (Convert ptr mem) mem) -> ptr |
| |
| // Decompose compound argument values |
| (Arg {n} [off]) && v.Type.IsString() -> |
| (StringMake |
| (Arg <config.fe.TypeBytePtr()> {n} [off]) |
| (Arg <config.fe.TypeInt()> {n} [off+config.PtrSize])) |
| |
| (Arg {n} [off]) && v.Type.IsSlice() -> |
| (SliceMake |
| (Arg <v.Type.ElemType().PtrTo()> {n} [off]) |
| (Arg <config.fe.TypeInt()> {n} [off+config.PtrSize]) |
| (Arg <config.fe.TypeInt()> {n} [off+2*config.PtrSize])) |
| |
| (Arg {n} [off]) && v.Type.IsInterface() -> |
| (IMake |
| (Arg <config.fe.TypeBytePtr()> {n} [off]) |
| (Arg <config.fe.TypeBytePtr()> {n} [off+config.PtrSize])) |
| |
| (Arg {n} [off]) && v.Type.IsComplex() && v.Type.Size() == 16 -> |
| (ComplexMake |
| (Arg <config.fe.TypeFloat64()> {n} [off]) |
| (Arg <config.fe.TypeFloat64()> {n} [off+8])) |
| |
| (Arg {n} [off]) && v.Type.IsComplex() && v.Type.Size() == 8 -> |
| (ComplexMake |
| (Arg <config.fe.TypeFloat32()> {n} [off]) |
| (Arg <config.fe.TypeFloat32()> {n} [off+4])) |
| |
| (Arg <t>) && t.IsStruct() && t.NumFields() == 0 && config.fe.CanSSA(t) -> |
| (StructMake0) |
| (Arg <t> {n} [off]) && t.IsStruct() && t.NumFields() == 1 && config.fe.CanSSA(t) -> |
| (StructMake1 |
| (Arg <t.FieldType(0)> {n} [off+t.FieldOff(0)])) |
| (Arg <t> {n} [off]) && t.IsStruct() && t.NumFields() == 2 && config.fe.CanSSA(t) -> |
| (StructMake2 |
| (Arg <t.FieldType(0)> {n} [off+t.FieldOff(0)]) |
| (Arg <t.FieldType(1)> {n} [off+t.FieldOff(1)])) |
| (Arg <t> {n} [off]) && t.IsStruct() && t.NumFields() == 3 && config.fe.CanSSA(t) -> |
| (StructMake3 |
| (Arg <t.FieldType(0)> {n} [off+t.FieldOff(0)]) |
| (Arg <t.FieldType(1)> {n} [off+t.FieldOff(1)]) |
| (Arg <t.FieldType(2)> {n} [off+t.FieldOff(2)])) |
| (Arg <t> {n} [off]) && t.IsStruct() && t.NumFields() == 4 && config.fe.CanSSA(t) -> |
| (StructMake4 |
| (Arg <t.FieldType(0)> {n} [off+t.FieldOff(0)]) |
| (Arg <t.FieldType(1)> {n} [off+t.FieldOff(1)]) |
| (Arg <t.FieldType(2)> {n} [off+t.FieldOff(2)]) |
| (Arg <t.FieldType(3)> {n} [off+t.FieldOff(3)])) |
| |
| // strength reduction of divide by a constant. |
| // Note: frontend does <=32 bits. We only need to do 64 bits here. |
| // TODO: Do them all here? |
| |
| // Div/mod by 1. Currently handled by frontend. |
| //(Div64 n (Const64 [1])) -> n |
| //(Div64u n (Const64 [1])) -> n |
| //(Mod64 n (Const64 [1])) -> (Const64 [0]) |
| //(Mod64u n (Const64 [1])) -> (Const64 [0]) |
| |
| // Unsigned divide by power of 2. |
| (Div64u <t> n (Const64 [c])) && isPowerOfTwo(c) -> (Rsh64Ux64 n (Const64 <t> [log2(c)])) |
| (Mod64u <t> n (Const64 [c])) && isPowerOfTwo(c) -> (And64 n (Const64 <t> [c-1])) |
| |
| // Signed divide by power of 2. Currently handled by frontend. |
| // n / c = n >> log(c) if n >= 0 |
| // = (n+c-1) >> log(c) if n < 0 |
| // We conditionally add c-1 by adding n>>63>>(64-log(c)) (first shift signed, second shift unsigned). |
| //(Div64 <t> n (Const64 [c])) && isPowerOfTwo(c) -> |
| // (Rsh64x64 |
| // (Add64 <t> |
| // n |
| // (Rsh64Ux64 <t> |
| // (Rsh64x64 <t> n (Const64 <t> [63])) |
| // (Const64 <t> [64-log2(c)]))) |
| // (Const64 <t> [log2(c)])) |
| |
| // Unsigned divide, not a power of 2. Strength reduce to a multiply. |
| (Div64u <t> x (Const64 [c])) && umagic64ok(c) && !umagic64a(c) -> |
| (Rsh64Ux64 |
| (Hmul64u <t> |
| (Const64 <t> [umagic64m(c)]) |
| x) |
| (Const64 <t> [umagic64s(c)])) |
| (Div64u <t> x (Const64 [c])) && umagic64ok(c) && umagic64a(c) -> |
| (Rsh64Ux64 |
| (Avg64u <t> |
| (Hmul64u <t> |
| x |
| (Const64 <t> [umagic64m(c)])) |
| x) |
| (Const64 <t> [umagic64s(c)-1])) |
| |
| // Signed divide, not a power of 2. Strength reduce to a multiply. |
| (Div64 <t> x (Const64 [c])) && c > 0 && smagic64ok(c) && smagic64m(c) > 0 -> |
| (Sub64 <t> |
| (Rsh64x64 <t> |
| (Hmul64 <t> |
| (Const64 <t> [smagic64m(c)]) |
| x) |
| (Const64 <t> [smagic64s(c)])) |
| (Rsh64x64 <t> |
| x |
| (Const64 <t> [63]))) |
| (Div64 <t> x (Const64 [c])) && c > 0 && smagic64ok(c) && smagic64m(c) < 0 -> |
| (Sub64 <t> |
| (Rsh64x64 <t> |
| (Add64 <t> |
| (Hmul64 <t> |
| (Const64 <t> [smagic64m(c)]) |
| x) |
| x) |
| (Const64 <t> [smagic64s(c)])) |
| (Rsh64x64 <t> |
| x |
| (Const64 <t> [63]))) |
| (Div64 <t> x (Const64 [c])) && c < 0 && smagic64ok(c) && smagic64m(c) > 0 -> |
| (Neg64 <t> |
| (Sub64 <t> |
| (Rsh64x64 <t> |
| (Hmul64 <t> |
| (Const64 <t> [smagic64m(c)]) |
| x) |
| (Const64 <t> [smagic64s(c)])) |
| (Rsh64x64 <t> |
| x |
| (Const64 <t> [63])))) |
| (Div64 <t> x (Const64 [c])) && c < 0 && smagic64ok(c) && smagic64m(c) < 0 -> |
| (Neg64 <t> |
| (Sub64 <t> |
| (Rsh64x64 <t> |
| (Add64 <t> |
| (Hmul64 <t> |
| (Const64 <t> [smagic64m(c)]) |
| x) |
| x) |
| (Const64 <t> [smagic64s(c)])) |
| (Rsh64x64 <t> |
| x |
| (Const64 <t> [63])))) |
| |
| // A%B = A-(A/B*B). |
| // This implements % with two * and a bunch of ancillary ops. |
| // One of the * is free if the user's code also computes A/B. |
| (Mod64 <t> x (Const64 [c])) && x.Op != OpConst64 && smagic64ok(c) |
| -> (Sub64 x (Mul64 <t> (Div64 <t> x (Const64 <t> [c])) (Const64 <t> [c]))) |
| (Mod64u <t> x (Const64 [c])) && x.Op != OpConst64 && umagic64ok(c) |
| -> (Sub64 x (Mul64 <t> (Div64u <t> x (Const64 <t> [c])) (Const64 <t> [c]))) |
| |
| // floating point optimizations |
| (Add32F x (Const32F [0])) -> x |
| (Add32F (Const32F [0]) x) -> x |
| (Add64F x (Const64F [0])) -> x |
| (Add64F (Const64F [0]) x) -> x |
| (Sub32F x (Const32F [0])) -> x |
| (Sub64F x (Const64F [0])) -> x |
| (Mul32F x (Const32F [f2i(1)])) -> x |
| (Mul32F (Const32F [f2i(1)]) x) -> x |
| (Mul64F x (Const64F [f2i(1)])) -> x |
| (Mul64F (Const64F [f2i(1)]) x) -> x |
| (Mul32F x (Const32F [f2i(-1)])) -> (Neg32F x) |
| (Mul32F (Const32F [f2i(-1)]) x) -> (Neg32F x) |
| (Mul64F x (Const64F [f2i(-1)])) -> (Neg64F x) |
| (Mul64F (Const64F [f2i(-1)]) x) -> (Neg64F x) |
| (Div32F x (Const32F [f2i(1)])) -> x |
| (Div64F x (Const64F [f2i(1)])) -> x |
| (Div32F x (Const32F [f2i(-1)])) -> (Neg32F x) |
| (Div64F x (Const64F [f2i(-1)])) -> (Neg32F x) |
