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go/test/fixedbugs/issue67160.go
khr@golang.org 3c72dd513c cmd/compile: don't combine loads in generated equality functions
... if the architecture can't do unaligned loads.
We already handle this in a few places, but this particular place
was added in CL 399542 and missed this additional restriction.

Fixes #67160

Change-Id: I45988f11ff3ed45df1c4da3f0931ab1fdb22dbfe
Reviewed-on: https://go-review.googlesource.com/c/go/+/583175
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Auto-Submit: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Derek Parker <parkerderek86@gmail.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2024-05-06 15:34:04 +00:00

33 lines
767 B
Go

// run
// Copyright 2024 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.
// Test to make sure that we don't try using larger loads for
// generated equality functions on architectures that can't do
// unaligned loads.
package main
// T has a big field that wants to be compared with larger loads/stores.
// T is "special" because of the unnamed field, so it needs a generated equality function.
// T is an odd number of bytes in size and has alignment 1.
type T struct {
src [8]byte
_ byte
}
// U contains 8 copies of T, each at a different %8 alignment.
type U [8]T
//go:noinline
func f(x, y *U) bool {
return *x == *y
}
func main() {
var a U
_ = f(&a, &a)
}