mirror of
https://github.com/golang/go
synced 2024-11-23 08:00:05 -07:00
9c066bab64
This is an extension of https://go-review.googlesource.com/c/31662/ to mark all the temporaries, not just the ssa-generated ones. Before-and-after ls -l `go tool -n compile` shows a 3% reduction in size (or rather, a prior 3% inflation for failing to filter temps out properly.) Replaced name-dependent "is it a temp?" tests with calls to *Node.IsAutoTmp(), which depends on AutoTemp. Also replace calls to istemp(n) with n.IsAutoTmp(), to reduce duplication and clean up function name space. Generated temporaries now come with a "." prefix to avoid (apparently harmless) clashes with legal Go variable names. Fixes #17644. Fixes #17240. Change-Id: If1417f29c79a7275d7303ddf859b51472890fd43 Reviewed-on: https://go-review.googlesource.com/32255 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
32 lines
880 B
Go
32 lines
880 B
Go
// errorcheck -0 -m -live
|
|
|
|
// Copyright 2016 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.
|
|
|
|
// Test escape analysis and liveness inferred for uintptrescapes functions.
|
|
|
|
package p
|
|
|
|
import (
|
|
"unsafe"
|
|
)
|
|
|
|
//go:uintptrescapes
|
|
//go:noinline
|
|
func F1(a uintptr) {} // ERROR "escaping uintptr"
|
|
|
|
//go:uintptrescapes
|
|
//go:noinline
|
|
func F2(a ...uintptr) {} // ERROR "escaping ...uintptr" "a does not escape"
|
|
|
|
func G() {
|
|
var t int // ERROR "moved to heap"
|
|
F1(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to F1: .?autotmp" "&t escapes to heap"
|
|
}
|
|
|
|
func H() {
|
|
var v int // ERROR "moved to heap"
|
|
F2(0, 1, uintptr(unsafe.Pointer(&v)), 2) // ERROR "live at call to newobject: .?autotmp" "live at call to F2: .?autotmp" "escapes to heap"
|
|
}
|