| // 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. |
| |
| // constant folding |
| (Add <t> (Const [c]) (Const [d])) && is64BitInt(t) && isSigned(t) -> (Const [{c.(int64)+d.(int64)}]) |
| (Add <t> (Const [c]) (Const [d])) && is64BitInt(t) && !isSigned(t) -> (Const [{c.(uint64)+d.(uint64)}]) |
| |
| // tear apart slices |
| // TODO: anything that generates a slice needs to go in here. |
| (SlicePtr (Load ptr mem)) -> (Load ptr mem) |
| (SliceLen (Load ptr mem)) -> (Load (Add <ptr.Type> ptr (Const <v.Block.Func.Config.UIntPtr> [int64(v.Block.Func.Config.ptrSize)])) mem) |
| (SliceCap (Load ptr mem)) -> (Load (Add <ptr.Type> ptr (Const <v.Block.Func.Config.UIntPtr> [int64(v.Block.Func.Config.ptrSize*2)])) mem) |
| |
| // expand array indexing |
| // others? Depends on what is already done by frontend |
| |
| // Note: bounds check has already been done |
| (SliceIndex s i mem) -> (Load (Add <s.Type.Elem().PtrTo()> (SlicePtr <s.Type.Elem().PtrTo()> s) (Mul <v.Block.Func.Config.UIntPtr> i (Const <v.Block.Func.Config.UIntPtr> [s.Type.Elem().Size()]))) mem) |
