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cmd/compile: ignore contentEscapes for marking nodes as escaping

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Redo of CL 28575 with fixed test.
We're in a pre-KeepAlive world for a bit yet, the old tests
were in a client which was in a post-KeepAlive world.

Change-Id: I114fd630339d761ab3306d1d99718d3cb973678d
Reviewed-on: https://go-review.googlesource.com/28582
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Keith Randall 2016-09-06 21:08:21 -07:00
parent ca264cdc62
commit 83c73a85db
3 changed files with 21 additions and 1 deletions
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2
src/cmd/compile/internal/gc/esc.go
View file

@ -1572,7 +1572,7 @@ func esccall(e *EscState, n *Node, up *Node) {
}
if haspointers(t.Type) {
if escassignfromtag(e, note, nE.Escretval, src) == EscNone && up.Op != ODEFER && up.Op != OPROC {
if escassignfromtag(e, note, nE.Escretval, src)&EscMask == EscNone && up.Op != ODEFER && up.Op != OPROC {
a := src
for a.Op == OCONVNOP {
a = a.Left

11
test/live.go
View file

@ -643,3 +643,14 @@ func good40() {
printnl() // ERROR "live at call to printnl: autotmp_[0-9]+ ret$"
_ = t
}
func ddd1(x, y *int) { // ERROR "live at entry to ddd1: x y$"
ddd2(x, y) // ERROR "live at call to ddd2: x y autotmp_[0-9]+$"
printnl() // ERROR "live at call to printnl: x y$"
// Note: no autotmp live at printnl. See issue 16996.
}
func ddd2(a ...*int) { // ERROR "live at entry to ddd2: a$"
sink = a[0]
}
var sink *int

9
test/live_ssa.go
View file

@ -646,3 +646,12 @@ func good40() {
printnl() // ERROR "live at call to printnl: autotmp_[0-9]+ ret$"
_ = t
}
func ddd1(x, y *int) { // ERROR "live at entry to ddd1: x y$"
ddd2(x, y) // ERROR "live at call to ddd2: x y autotmp_[0-9]+$"
printnl() // ERROR "live at call to printnl: x y$"
// Note: no autotmp live at printnl. See issue 16996.
}
func ddd2(a ...*int) { // ERROR "live at entry to ddd2: a$"
sink = a[0]
}