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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-16 19:25:22 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-16 19:25:22 +0000
commitf6ad4dcef54c5ce997a4bad5a6d86de229015700 (patch)
tree7cfa4e31ace5c2bd95c72b154d15af494b2bcbef /test/fixedbugs/issue12588.go
parentInitial commit. (diff)
downloadgolang-1.22-f6ad4dcef54c5ce997a4bad5a6d86de229015700.tar.xz
golang-1.22-f6ad4dcef54c5ce997a4bad5a6d86de229015700.zip
Adding upstream version 1.22.1.upstream/1.22.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'test/fixedbugs/issue12588.go')
-rw-r--r--test/fixedbugs/issue12588.go88
1 files changed, 88 insertions, 0 deletions
diff --git a/test/fixedbugs/issue12588.go b/test/fixedbugs/issue12588.go
new file mode 100644
index 0000000..dc81111
--- /dev/null
+++ b/test/fixedbugs/issue12588.go
@@ -0,0 +1,88 @@
+// errorcheck -0 -m -l
+
+// Copyright 2015 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.
+
+// Tests escape analysis for range of arrays.
+// Compiles but need not run. Inlining is disabled.
+
+package main
+
+type A struct {
+ b [3]uint64
+}
+
+type B struct {
+ b [3]*uint64
+}
+
+func f(a A) int {
+ for i, x := range &a.b {
+ if x != 0 {
+ return 64*i + int(x)
+ }
+ }
+ return 0
+}
+
+func g(a *A) int { // ERROR "a does not escape"
+ for i, x := range &a.b {
+ if x != 0 {
+ return 64*i + int(x)
+ }
+ }
+ return 0
+}
+
+func h(a *B) *uint64 { // ERROR "leaking param: a to result ~r0 level=1"
+ for i, x := range &a.b {
+ if i == 0 {
+ return x
+ }
+ }
+ return nil
+}
+
+func h2(a *B) *uint64 { // ERROR "leaking param: a to result ~r0 level=1"
+ p := &a.b
+ for i, x := range p {
+ if i == 0 {
+ return x
+ }
+ }
+ return nil
+}
+
+// Seems like below should be level=1, not 0.
+func k(a B) *uint64 { // ERROR "leaking param: a to result ~r0 level=0"
+ for i, x := range &a.b {
+ if i == 0 {
+ return x
+ }
+ }
+ return nil
+}
+
+var sink *uint64
+
+func main() {
+ var a1, a2 A
+ var b1, b2, b3, b4 B
+ var x1, x2, x3, x4 uint64 // ERROR "moved to heap: x1" "moved to heap: x3"
+ b1.b[0] = &x1
+ b2.b[0] = &x2
+ b3.b[0] = &x3
+ b4.b[0] = &x4
+ f(a1)
+ g(&a2)
+ sink = h(&b1)
+ h(&b2)
+ sink = h2(&b1)
+ h2(&b4)
+ x1 = 17
+ println("*sink=", *sink) // Verify that sink addresses x1
+ x3 = 42
+ sink = k(b3)
+ println("*sink=", *sink) // Verify that sink addresses x3
+}