Initial commit: Go 1.23 release state

test/codegen/atomics.go

@@ -0,0 +1,27 @@
+// asmcheck
+
+// 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.
+
+// These tests check that atomic instructions without dynamic checks are
+// generated for architectures that support them
+
+package codegen
+
+import "sync/atomic"
+
+type Counter struct {
+	count int32
+}
+
+func (c *Counter) Increment() {
+	// Check that ARm64 v8.0 has both atomic instruction (LDADDALW) and a dynamic check
+	// (for arm64HasATOMICS), while ARM64 v8.1 has only atomic and no dynamic check.
+	// arm64/v8.0:"LDADDALW"
+	// arm64/v8.1:"LDADDALW"
+	// arm64/v8.0:".*arm64HasATOMICS"
+	// arm64/v8.1:-".*arm64HasATOMICS"
+	atomic.AddInt32(&c.count, 1)
+}
+