1 // compile 2 3 // Copyright 2017 The Go Authors. All rights reserved. 4 // Use of this source code is governed by a BSD-style 5 // license that can be found in the LICENSE file. 6 7 // Issue 19137: folding address into load/store causes 8 // odd offset on ARM64. 9 10 package p 11 12 type T struct { 13 p *int 14 a [2]byte 15 b [6]byte // not 4-byte aligned 16 } 17 18 func f(b [6]byte) T { 19 var x [1000]int // a large stack frame 20 _ = x 21 return T{b: b} 22 } 23 24 // Arg symbol's base address may be not at an aligned offset to 25 // SP. Folding arg's address into load/store may cause odd offset. 26 func move(a, b [20]byte) [20]byte { 27 var x [1000]int // a large stack frame 28 _ = x 29 return b // b is not 8-byte aligned to SP 30 } 31 func zero() ([20]byte, [20]byte) { 32 var x [1000]int // a large stack frame 33 _ = x 34 return [20]byte{}, [20]byte{} // the second return value is not 8-byte aligned to SP 35 } 36 37 // Issue 21992: unaligned offset between 256 and 504 and handled 38 // incorrectly. 39 type T2 struct { 40 a [257]byte 41 // fields below are not 8-, 4-, 2-byte aligned 42 b [8]byte 43 c [4]byte 44 d [2]byte 45 } 46 47 func f2(x *T2) { 48 x.b = [8]byte{} 49 x.c = [4]byte{} 50 x.d = [2]byte{} 51 } 52
