mirror of
https://github.com/golang/go
synced 2024-11-02 08:01:26 +00:00
7f27f1dfdd
Add the following optimizations: - fold constants - fold address into load/store - simplify extensions and conditional branches - remove nil checks Turn on SSA on MIPS64 by default, and toggle the tests. Fixes #16359. Change-Id: I7f1e38c2509e22e42cd024e712990ebbe47176bd Reviewed-on: https://go-review.googlesource.com/27870 Run-TryBot: Cherry Zhang <cherryyz@google.com> Reviewed-by: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
60 lines
3.1 KiB
Go
60 lines
3.1 KiB
Go
// +build !amd64,!arm,!amd64p32,!386,!arm64,!ppc64le,!mips64,!mips64le
|
|
// errorcheck -0 -d=append,slice
|
|
|
|
// 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.
|
|
|
|
// Check optimization results for append and slicing.
|
|
|
|
package main
|
|
|
|
func a1(x []int, y int) []int {
|
|
x = append(x, y) // ERROR "append: len-only update"
|
|
return x
|
|
}
|
|
|
|
func a2(x []int, y int) []int {
|
|
return append(x, y) // ERROR "append: full update"
|
|
}
|
|
|
|
func a3(x *[]int, y int) {
|
|
*x = append(*x, y) // ERROR "append: len-only update"
|
|
}
|
|
|
|
func s1(x **[]int, xs **string, i, j int) {
|
|
var z []int
|
|
z = (**x)[2:] // ERROR "slice: omit check for 2nd index"
|
|
z = (**x)[2:len(**x)] // not yet: "slice: reuse len" "slice: omit check for 2nd index"
|
|
z = (**x)[2:cap(**x)] // not yet: "slice: reuse cap" "slice: omit check for 2nd index"
|
|
z = (**x)[i:i] // ERROR "slice: reuse 1st index" "slice: omit check for 1st index" "slice: result len == 0"
|
|
z = (**x)[1:i:i] // ERROR "slice: reuse 2nd index" "slice: omit check for 2nd index" "slice: result cap == result len"
|
|
z = (**x)[i:j:0] // ERROR "slice: omit check for 3rd index"
|
|
z = (**x)[i:0:j] // ERROR "slice: omit check for 2nd index"
|
|
z = (**x)[0:i:j] // ERROR "slice: omit check for 1st index" "slice: skip base adjustment for 1st index 0"
|
|
z = (**x)[0:] // ERROR "slice: omit slice operation"
|
|
z = (**x)[2:8] // ERROR "slice: omit check for 1st index" "slice: result len == 6"
|
|
z = (**x)[2:2] // ERROR "slice: omit check for 1st index" "slice: result len == 0"
|
|
z = (**x)[0:i] // ERROR "slice: omit check for 1st index" "slice: skip base adjustment for 1st index 0"
|
|
z = (**x)[2:i:8] // ERROR "slice: result cap == 6"
|
|
z = (**x)[i:2:i] // ERROR "slice: reuse 1st index" "slice: result cap == 0" "slice: skip base adjustment for cap == 0"
|
|
|
|
z = z[0:i] // ERROR "slice: omit check for 1st index" "slice: result cap not computed" "slice: skip base adjustment for 1st index 0" "slice: len-only update"
|
|
z = z[0:i : i+1] // ERROR "slice: omit check for 1st index" "slice: skip base adjustment for 1st index 0" "slice: len/cap-only update"
|
|
z = z[i : i+1]
|
|
|
|
println(z)
|
|
|
|
var zs string
|
|
zs = (**xs)[2:] // ERROR "slice: omit check for 2nd index"
|
|
zs = (**xs)[2:len(**xs)] // not yet: "slice: reuse len" "slice: omit check for 2nd index"
|
|
zs = (**xs)[i:i] // ERROR "slice: reuse 1st index" "slice: omit check for 1st index" "slice: result len == 0" "slice: skip base adjustment for string len == 0"
|
|
zs = (**xs)[0:] // ERROR "slice: omit slice operation"
|
|
zs = (**xs)[2:8] // ERROR "slice: omit check for 1st index" "slice: result len == 6"
|
|
zs = (**xs)[2:2] // ERROR "slice: omit check for 1st index" "slice: result len == 0" "slice: skip base adjustment for string len == 0"
|
|
zs = (**xs)[0:i] // ERROR "slice: omit check for 1st index" "slice: skip base adjustment for 1st index 0"
|
|
|
|
zs = zs[0:i] // ERROR "slice: omit check for 1st index" "slice: skip base adjustment for 1st index 0" "slice: len-only update"
|
|
zs = zs[i : i+1]
|
|
println(zs)
|
|
}
|