1// asmcheck
2
3// Copyright 2018 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
7package codegen
8
9// Test to make sure that (CMPQ (ANDQ x y) [0]) does not get rewritten to
10// (TESTQ x y) if the ANDQ has other uses. If that rewrite happens, then one
11// of the args of the ANDQ needs to be saved so it can be used as the arg to TESTQ.
12func andWithUse(x, y int) int {
13	z := x & y
14	// amd64:`TESTQ\s(AX, AX|BX, BX|CX, CX|DX, DX|SI, SI|DI, DI|R8, R8|R9, R9|R10, R10|R11, R11|R12, R12|R13, R13|R15, R15)`
15	if z == 0 {
16		return 77
17	}
18	// use z by returning it
19	return z
20}
21
22// Verify (OR x (NOT y)) rewrites to (ORN x y) where supported
23func ornot(x, y int) int {
24	// ppc64x:"ORN"
25	z := x | ^y
26	return z
27}
28
29// Verify that (OR (NOT x) (NOT y)) rewrites to (NOT (AND x y))
30func orDemorgans(x, y int) int {
31	// amd64:"AND",-"OR"
32	z := ^x | ^y
33	return z
34}
35
36// Verify that (AND (NOT x) (NOT y)) rewrites to (NOT (OR x y))
37func andDemorgans(x, y int) int {
38	// amd64:"OR",-"AND"
39	z := ^x & ^y
40	return z
41}
42