go/test/codegen/clobberdeadreg.go
Cherry Zhang 263e13d1f7 test: make codegen tests work with both ABIs
Some codegen tests were written with the assumption that
arguments and results are in memory, and with a specific stack
layout. With the register ABI, the assumption is no longer true.
Adjust the tests to work with both cases.

- For tests expecting in memory arguments/results, change to use
  global variables or memory-assigned argument/results.

- Allow more registers. E.g. some tests expecting register names
  contain only letters (e.g. AX), but  it can also contain numbers
  (e.g. R10).

- Some instruction selection changes when operate on register vs.
  memory, e.g. ADDQ vs. LEAQ, MOVB vs. MOVL. Accept both.

TODO: mathbits.go and memops.go still need fix.
Change-Id: Ic5932b4b5dd3f5d30ed078d296476b641420c4c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/309335
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
2021-04-12 21:59:59 +00:00

34 lines
1.3 KiB
Go

// asmcheck -gcflags=-clobberdeadreg
// +build amd64
// Copyright 2021 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.
package codegen
type S struct {
a, b, c, d, e, f int
}
func F(a, b, c int, d S) {
// -2401018187971961171 is 0xdeaddeaddeaddead
// amd64:`MOVQ\t\$-2401018187971961171, AX`, `MOVQ\t\$-2401018187971961171, BX`, `MOVQ\t\$-2401018187971961171, CX`
// amd64:`MOVQ\t\$-2401018187971961171, DX`, `MOVQ\t\$-2401018187971961171, SI`, `MOVQ\t\$-2401018187971961171, DI`
// amd64:`MOVQ\t\$-2401018187971961171, R8`, `MOVQ\t\$-2401018187971961171, R9`, `MOVQ\t\$-2401018187971961171, R10`
// amd64:`MOVQ\t\$-2401018187971961171, R11`, `MOVQ\t\$-2401018187971961171, R12`, `MOVQ\t\$-2401018187971961171, R13`
// amd64:-`MOVQ\t\$-2401018187971961171, BP` // frame pointer is not clobbered
StackArgsCall([10]int{a, b, c})
// amd64:`MOVQ\t\$-2401018187971961171, R12`, `MOVQ\t\$-2401018187971961171, R13`, `MOVQ\t\$-2401018187971961171, DX`
// amd64:-`MOVQ\t\$-2401018187971961171, AX`, -`MOVQ\t\$-2401018187971961171, R11` // register args are not clobbered
RegArgsCall(a, b, c, d)
}
//go:noinline
func StackArgsCall([10]int) {}
//go:noinline
//go:registerparams
func RegArgsCall(int, int, int, S) {}