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-rw-r--r--test/live.go152
1 files changed, 86 insertions, 66 deletions
diff --git a/test/live.go b/test/live.go
index f69d0a4c1..62c6a0b0e 100644
--- a/test/live.go
+++ b/test/live.go
@@ -9,20 +9,39 @@
package main
+func printnl()
+
+//go:noescape
+func printpointer(**int)
+
+//go:noescape
+func printintpointer(*int)
+
+//go:noescape
+func printstringpointer(*string)
+
+//go:noescape
+func printstring(string)
+
+//go:noescape
+func printbytepointer(*byte)
+
+func printint(int)
+
func f1() {
var x *int
- print(&x) // ERROR "live at call to printpointer: x$"
- print(&x) // ERROR "live at call to printpointer: x$"
+ printpointer(&x) // ERROR "live at call to printpointer: x$"
+ printpointer(&x) // ERROR "live at call to printpointer: x$"
}
func f2(b bool) {
if b {
- print(0) // nothing live here
+ printint(0) // nothing live here
return
}
var x *int
- print(&x) // ERROR "live at call to printpointer: x$"
- print(&x) // ERROR "live at call to printpointer: x$"
+ printpointer(&x) // ERROR "live at call to printpointer: x$"
+ printpointer(&x) // ERROR "live at call to printpointer: x$"
}
func f3(b bool) {
@@ -30,22 +49,22 @@ func f3(b bool) {
// live throughout the function, to avoid being poisoned
// in GODEBUG=gcdead=1 mode.
- print(0) // ERROR "live at call to printint: x y$"
+ printint(0) // ERROR "live at call to printint: x y$"
if b == false {
- print(0) // ERROR "live at call to printint: x y$"
+ printint(0) // ERROR "live at call to printint: x y$"
return
}
if b {
var x *int
- print(&x) // ERROR "live at call to printpointer: x y$"
- print(&x) // ERROR "live at call to printpointer: x y$"
+ printpointer(&x) // ERROR "live at call to printpointer: x y$"
+ printpointer(&x) // ERROR "live at call to printpointer: x y$"
} else {
var y *int
- print(&y) // ERROR "live at call to printpointer: x y$"
- print(&y) // ERROR "live at call to printpointer: x y$"
+ printpointer(&y) // ERROR "live at call to printpointer: x y$"
+ printpointer(&y) // ERROR "live at call to printpointer: x y$"
}
- print(0) // ERROR "live at call to printint: x y$" "x \(type \*int\) is ambiguously live" "y \(type \*int\) is ambiguously live"
+ printint(0) // ERROR "live at call to printint: x y$" "x \(type \*int\) is ambiguously live" "y \(type \*int\) is ambiguously live"
}
// The old algorithm treated x as live on all code that
@@ -56,20 +75,20 @@ func f3(b bool) {
func f4(b1, b2 bool) { // x not live here
if b2 {
- print(0) // x not live here
+ printint(0) // x not live here
return
}
var z **int
x := new(int)
*x = 42
z = &x
- print(**z) // ERROR "live at call to printint: x z$"
+ printint(**z) // ERROR "live at call to printint: x z$"
if b2 {
- print(1) // ERROR "live at call to printint: x$"
+ printint(1) // ERROR "live at call to printint: x$"
return
}
for {
- print(**z) // ERROR "live at call to printint: x z$"
+ printint(**z) // ERROR "live at call to printint: x z$"
}
}
@@ -84,7 +103,7 @@ func f5(b1 bool) {
*y = 54
z = &y
}
- print(**z) // ERROR "live at call to printint: x y$" "x \(type \*int\) is ambiguously live" "y \(type \*int\) is ambiguously live"
+ printint(**z) // ERROR "live at call to printint: x y$" "x \(type \*int\) is ambiguously live" "y \(type \*int\) is ambiguously live"
}
// confusion about the _ result used to cause spurious "live at entry to f6: _".
@@ -155,8 +174,8 @@ func f11b() *int {
// At this point p is dead: the code here cannot
// get to the bottom of the function.
// This used to have a spurious "live at call to printint: p".
- print(1) // nothing live here!
- select { // ERROR "live at call to newselect: autotmp" "live at call to selectgo: autotmp"
+ printint(1) // nothing live here!
+ select { // ERROR "live at call to newselect: autotmp" "live at call to selectgo: autotmp"
case <-c: // ERROR "live at call to selectrecv: autotmp"
return nil
case <-c: // ERROR "live at call to selectrecv: autotmp"
@@ -172,8 +191,8 @@ func f11c() *int {
if b {
// Unlike previous, the cases in this select fall through,
// so we can get to the println, so p is not dead.
- print(1) // ERROR "live at call to printint: p"
- select { // ERROR "live at call to newselect: autotmp.* p" "live at call to selectgo: autotmp.* p"
+ printint(1) // ERROR "live at call to printint: p"
+ select { // ERROR "live at call to newselect: autotmp.* p" "live at call to selectgo: autotmp.* p"
case <-c: // ERROR "live at call to selectrecv: autotmp.* p"
case <-c: // ERROR "live at call to selectrecv: autotmp.* p"
}
@@ -209,7 +228,7 @@ func h13(string, string) string
func f14() {
x := g14()
- print(&x) // ERROR "live at call to printpointer: x"
+ printstringpointer(&x) // ERROR "live at call to printstringpointer: x"
}
func g14() string
@@ -217,8 +236,8 @@ func g14() string
func f15() {
var x string
_ = &x
- x = g15() // ERROR "live at call to g15: x"
- print(x) // ERROR "live at call to printstring: x"
+ x = g15() // ERROR "live at call to g15: x"
+ printstring(x) // ERROR "live at call to printstring: x"
}
func g15() string
@@ -282,7 +301,7 @@ func f18() {
}
z = m2[g18()] // ERROR "live at call to mapaccess1: autotmp_[0-9]+$"
z = m2[g18()] // ERROR "live at call to mapaccess1: autotmp_[0-9]+$"
- print(z)
+ printbytepointer(z)
}
var ch chan *byte
@@ -296,7 +315,7 @@ func f19() {
}
z = <-ch // ERROR "live at call to chanrecv1: autotmp_[0-9]+$"
z = <-ch // ERROR "live at call to chanrecv1: autotmp_[0-9]+$"
- print(z)
+ printbytepointer(z)
}
func f20() {
@@ -316,7 +335,7 @@ func f21() {
}
z = m2[[2]string{"x", "y"}] // ERROR "live at call to mapaccess1: autotmp_[0-9]+$"
z = m2[[2]string{"x", "y"}] // ERROR "live at call to mapaccess1: autotmp_[0-9]+$"
- print(z)
+ printbytepointer(z)
}
func f23() {
@@ -328,7 +347,8 @@ func f23() {
}
z, ok = m2[[2]string{"x", "y"}] // ERROR "live at call to mapaccess2: autotmp_[0-9]+$"
z, ok = m2[[2]string{"x", "y"}] // ERROR "live at call to mapaccess2: autotmp_[0-9]+$"
- print(z, ok)
+ printbytepointer(z)
+ print(ok)
}
func f24() {
@@ -350,8 +370,8 @@ func f25(b bool) {
}
var x string
_ = &x
- x = g15() // ERROR "live at call to g15: x"
- print(x) // ERROR "live at call to printstring: x"
+ x = g15() // ERROR "live at call to g15: x"
+ printstring(x) // ERROR "live at call to printstring: x"
} // ERROR "live at call to deferreturn: x"
func g25()
@@ -366,7 +386,7 @@ func f26(b bool) {
}
print26((*int)(nil), (*int)(nil), (*int)(nil)) // ERROR "live at call to print26: autotmp_[0-9]+$"
print26((*int)(nil), (*int)(nil), (*int)(nil)) // ERROR "live at call to print26: autotmp_[0-9]+$"
- println()
+ printnl()
}
//go:noescape
@@ -381,7 +401,7 @@ func f27(b bool) {
}
call27(func() { x++ }) // ERROR "live at call to call27: autotmp_[0-9]+$"
call27(func() { x++ }) // ERROR "live at call to call27: autotmp_[0-9]+$"
- println()
+ printnl()
}
// but defer does escape to later execution in the function
@@ -392,7 +412,7 @@ func f27defer(b bool) {
defer call27(func() { x++ }) // ERROR "live at call to deferproc: autotmp_[0-9]+$" "live at call to deferreturn: autotmp_[0-9]+$"
}
defer call27(func() { x++ }) // ERROR "live at call to deferproc: autotmp_[0-9]+ autotmp_[0-9]+$" "live at call to deferreturn: autotmp_[0-9]+ autotmp_[0-9]+$" "ambiguously live"
- println() // ERROR "live at call to printnl: autotmp_[0-9]+ autotmp_[0-9]+$"
+ printnl() // ERROR "live at call to printnl: autotmp_[0-9]+ autotmp_[0-9]+$"
} // ERROR "live at call to deferreturn: autotmp_[0-9]+ autotmp_[0-9]+$"
// and newproc (go) escapes to the heap
@@ -403,7 +423,7 @@ func f27go(b bool) {
go call27(func() { x++ }) // ERROR "live at call to newobject: &x" "live at call to newproc: &x$"
}
go call27(func() { x++ }) // ERROR "live at call to newobject: &x"
- println()
+ printnl()
}
//go:noescape
@@ -415,10 +435,10 @@ var s1, s2, s3, s4, s5, s6, s7, s8, s9, s10 string
func f28(b bool) {
if b {
- print(s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10) // ERROR "live at call to concatstrings: autotmp_[0-9]+$" "live at call to printstring: autotmp_[0-9]+$"
+ printstring(s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10) // ERROR "live at call to concatstrings: autotmp_[0-9]+$" "live at call to printstring: autotmp_[0-9]+$"
}
- print(s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10) // ERROR "live at call to concatstrings: autotmp_[0-9]+$" "live at call to printstring: autotmp_[0-9]+$"
- print(s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10) // ERROR "live at call to concatstrings: autotmp_[0-9]+$" "live at call to printstring: autotmp_[0-9]+$"
+ printstring(s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10) // ERROR "live at call to concatstrings: autotmp_[0-9]+$" "live at call to printstring: autotmp_[0-9]+$"
+ printstring(s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10) // ERROR "live at call to concatstrings: autotmp_[0-9]+$" "live at call to printstring: autotmp_[0-9]+$"
}
// map iterator should die on end of range loop
@@ -426,14 +446,14 @@ func f28(b bool) {
func f29(b bool) {
if b {
for k := range m { // ERROR "live at call to mapiterinit: autotmp_[0-9]+$" "live at call to mapiternext: autotmp_[0-9]+$"
- print(k) // ERROR "live at call to printstring: autotmp_[0-9]+$"
+ printstring(k) // ERROR "live at call to printstring: autotmp_[0-9]+$"
}
}
for k := range m { // ERROR "live at call to mapiterinit: autotmp_[0-9]+$" "live at call to mapiternext: autotmp_[0-9]+$"
- print(k) // ERROR "live at call to printstring: autotmp_[0-9]+$"
+ printstring(k) // ERROR "live at call to printstring: autotmp_[0-9]+$"
}
for k := range m { // ERROR "live at call to mapiterinit: autotmp_[0-9]+$" "live at call to mapiternext: autotmp_[0-9]+$"
- print(k) // ERROR "live at call to printstring: autotmp_[0-9]+$"
+ printstring(k) // ERROR "live at call to printstring: autotmp_[0-9]+$"
}
}
@@ -446,14 +466,14 @@ func f30(b bool) {
// the copy of ptrarr and the internal iterator pointer.
if b {
for _, p := range ptrarr {
- print(p) // ERROR "live at call to printpointer: autotmp_[0-9]+ autotmp_[0-9]+$"
+ printintpointer(p) // ERROR "live at call to printintpointer: autotmp_[0-9]+ autotmp_[0-9]+$"
}
}
for _, p := range ptrarr {
- print(p) // ERROR "live at call to printpointer: autotmp_[0-9]+ autotmp_[0-9]+$"
+ printintpointer(p) // ERROR "live at call to printintpointer: autotmp_[0-9]+ autotmp_[0-9]+$"
}
for _, p := range ptrarr {
- print(p) // ERROR "live at call to printpointer: autotmp_[0-9]+ autotmp_[0-9]+$"
+ printintpointer(p) // ERROR "live at call to printintpointer: autotmp_[0-9]+ autotmp_[0-9]+$"
}
}
@@ -503,44 +523,44 @@ var m33 map[interface{}]int
func f33() {
if m33[nil] == 0 { // ERROR "live at call to mapaccess1: autotmp_[0-9]+$"
- println()
+ printnl()
return
} else {
- println()
+ printnl()
}
- println()
+ printnl()
}
func f34() {
if m33[nil] == 0 { // ERROR "live at call to mapaccess1: autotmp_[0-9]+$"
- println()
+ printnl()
return
}
- println()
+ printnl()
}
func f35() {
if m33[nil] == 0 && m33[nil] == 0 { // ERROR "live at call to mapaccess1: autotmp_[0-9]+$"
- println()
+ printnl()
return
}
- println()
+ printnl()
}
func f36() {
if m33[nil] == 0 || m33[nil] == 0 { // ERROR "live at call to mapaccess1: autotmp_[0-9]+$"
- println()
+ printnl()
return
}
- println()
+ printnl()
}
func f37() {
if (m33[nil] == 0 || m33[nil] == 0) && m33[nil] == 0 { // ERROR "live at call to mapaccess1: autotmp_[0-9]+$"
- println()
+ printnl()
return
}
- println()
+ printnl()
}
// select temps should disappear in the case bodies
@@ -558,44 +578,44 @@ func f38(b bool) {
if b {
select { // ERROR "live at call"
case <-fc38(): // ERROR "live at call"
- println()
+ printnl()
case fc38() <- *fi38(1): // ERROR "live at call"
- println()
+ printnl()
case *fi38(2) = <-fc38(): // ERROR "live at call"
- println()
+ printnl()
case *fi38(3), *fb38() = <-fc38(): // ERROR "live at call"
- println()
+ printnl()
}
- println()
+ printnl()
}
- println()
+ printnl()
}
// issue 8097: mishandling of x = x during return.
func f39() (x []int) {
x = []int{1}
- println() // ERROR "live at call to printnl: x"
+ printnl() // ERROR "live at call to printnl: x"
return x
}
func f39a() (x []int) {
x = []int{1}
- println() // ERROR "live at call to printnl: x"
+ printnl() // ERROR "live at call to printnl: x"
return
}
func f39b() (x [10]*int) {
x = [10]*int{}
x[0] = new(int) // ERROR "live at call to newobject: x"
- println() // ERROR "live at call to printnl: x"
+ printnl() // ERROR "live at call to printnl: x"
return x
}
func f39c() (x [10]*int) {
x = [10]*int{}
x[0] = new(int) // ERROR "live at call to newobject: x"
- println() // ERROR "live at call to printnl: x"
+ printnl() // ERROR "live at call to printnl: x"
return
}
@@ -615,13 +635,13 @@ func newT40() *T40 {
func bad40() {
t := newT40()
_ = t
- println()
+ printnl()
}
func good40() {
ret := T40{}
ret.m = make(map[int]int) // ERROR "live at call to makemap: ret"
t := &ret
- println() // ERROR "live at call to printnl: ret"
+ printnl() // ERROR "live at call to printnl: ret"
_ = t
}
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