test: use cgo.Incomplete instead of go:notinheap for "run" tests

Same as CL 421880, but for test directory.

Updates #46731

Change-Id: If8d18df013a6833adcbd40acc1a721bbc23ca6b2
Reviewed-on: https://go-review.googlesource.com/c/go/+/421881
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>

test/fixedbugs/bug514.go

@@ -4,14 +4,18 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build cgo
+
 package main
 
+import "runtime/cgo"
+
 type iface interface {
 	Get() int
 }
 
-//go:notinheap
 type notInHeap struct {
+	_ cgo.Incomplete
 	i int
 }
 
@@ -29,7 +33,7 @@ type embed struct {
 
 var val = 1234
 
-var valNotInHeap = notInHeap{val}
+var valNotInHeap = notInHeap{i: val}
 
 func main() {
 	i := val

test/fixedbugs/issue40954.go

@@ -4,24 +4,29 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build cgo
+
 package main
 
 import (
+	"runtime/cgo"
 	"unsafe"
 )
 
-//go:notinheap
+type S struct {
-type S struct{ x int }
+	_ cgo.Incomplete
+	x int
+}
 
 func main() {
 	var i int
 	p := (*S)(unsafe.Pointer(uintptr(unsafe.Pointer(&i))))
 	v := uintptr(unsafe.Pointer(p))
-	// p is a pointer to a go:notinheap type. Like some C libraries,
+	// p is a pointer to a not-in-heap type. Like some C libraries,
 	// we stored an integer in that pointer. That integer just happens
 	// to be the address of i.
 	// v is also the address of i.
-	// p has a base type which is marked go:notinheap, so it
+	// p has a base type which is marked not-in-heap, so it
 	// should not be adjusted when the stack is copied.
 	recurse(100, p, v)
 }

test/fixedbugs/issue42032.go

@@ -4,10 +4,14 @@
 // source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 
+//go:build cgo
+
 package main
 
-//go:notinheap
+import "runtime/cgo"
+
 type NIH struct {
+	_ cgo.Incomplete
 }
 
 type T struct {

test/fixedbugs/issue42076.go

@@ -4,12 +4,17 @@
 // source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 
+//go:build cgo
+
 package main
 
-import "reflect"
+import (
+	"reflect"
+	"runtime/cgo"
+)
 
-//go:notinheap
 type NIH struct {
+	_ cgo.Incomplete
 }
 
 var x, y NIH

test/fixedbugs/issue46903.go

@@ -1,6 +1,6 @@
 // run
-//go:build goexperiment.unified
+//go:build goexperiment.unified && cgo
-// +build goexperiment.unified
+// +build goexperiment.unified,cgo
 
 // TODO(mdempsky): Enable test unconditionally. This test should pass
 // for non-unified mode too.
@@ -11,8 +11,12 @@
 
 package main
 
-//go:notinheap
+import "runtime/cgo"
-type A struct{ B }
+
+type A struct {
+	B
+	_ cgo.Incomplete
+}
 type B struct{ x byte }
 type I interface{ M() *B }
 

test/fixedbugs/issue51733.go

@@ -4,15 +4,17 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build cgo
+
 package main
 
 import (
 	"log"
+	"runtime/cgo"
 	"unsafe"
 )
 
-//go:notinheap
+type S struct{ _ cgo.Incomplete }
-type S struct{}
 
 func main() {
 	p := (*S)(unsafe.Pointer(uintptr(0x8000)))