mirror of
https://github.com/golang/go
synced 2024-11-14 14:30:23 -07:00
5225854b74
CL 157910047 introduced code to turn a node representing
a zeroed composite literal into N, the nil Node* pointer
(which represents any zero, not the Go literal nil).
That's great for assignments like x = T{}, but it doesn't work
when T{} is used in a value context like T{}.v or x == T{}.
Fix those.
Should have no effect on performance; confirmed.
The deltas below are noise (compare ns/op):
benchmark old ns/op new ns/op delta
BenchmarkBinaryTree17 2902919192 2915228424 +0.42%
BenchmarkFannkuch11 2597417605 2630363685 +1.27%
BenchmarkFmtFprintfEmpty 73.7 74.8 +1.49%
BenchmarkFmtFprintfString 196 199 +1.53%
BenchmarkFmtFprintfInt 213 217 +1.88%
BenchmarkFmtFprintfIntInt 336 356 +5.95%
BenchmarkFmtFprintfPrefixedInt 289 294 +1.73%
BenchmarkFmtFprintfFloat 415 416 +0.24%
BenchmarkFmtManyArgs 1281 1271 -0.78%
BenchmarkGobDecode 10271734 10307978 +0.35%
BenchmarkGobEncode 8985021 9079442 +1.05%
BenchmarkGzip 410233227 412266944 +0.50%
BenchmarkGunzip 102114554 103272443 +1.13%
BenchmarkHTTPClientServer 45297 44993 -0.67%
BenchmarkJSONEncode 19499741 19498489 -0.01%
BenchmarkJSONDecode 76436733 74247497 -2.86%
BenchmarkMandelbrot200 4273814 4307292 +0.78%
BenchmarkGoParse 4024594 4028937 +0.11%
BenchmarkRegexpMatchEasy0_32 131 135 +3.05%
BenchmarkRegexpMatchEasy0_1K 328 333 +1.52%
BenchmarkRegexpMatchEasy1_32 115 117 +1.74%
BenchmarkRegexpMatchEasy1_1K 931 948 +1.83%
BenchmarkRegexpMatchMedium_32 216 217 +0.46%
BenchmarkRegexpMatchMedium_1K 72669 72857 +0.26%
BenchmarkRegexpMatchHard_32 3818 3809 -0.24%
BenchmarkRegexpMatchHard_1K 121398 121945 +0.45%
BenchmarkRevcomp 613996550 615145436 +0.19%
BenchmarkTemplate 93678525 93267391 -0.44%
BenchmarkTimeParse 414 411 -0.72%
BenchmarkTimeFormat 396 399 +0.76%
Fixes #8947.
LGTM=r
R=r, dave
CC=golang-codereviews
https://golang.org/cl/162130043
54 lines
752 B
Go
54 lines
752 B
Go
// run
|
|
|
|
// Copyright 2014 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.
|
|
|
|
// Some uses of zeroed constants in non-assignment
|
|
// expressions broke with our more aggressive zeroing
|
|
// of assignments (internal compiler errors).
|
|
|
|
package main
|
|
|
|
func f1() {
|
|
type T [2]int
|
|
p := T{0, 1}
|
|
switch p {
|
|
case T{0, 0}:
|
|
panic("wrong1")
|
|
case T{0, 1}:
|
|
// ok
|
|
default:
|
|
panic("wrong2")
|
|
}
|
|
|
|
if p == (T{0, 0}) {
|
|
panic("wrong3")
|
|
} else if p == (T{0, 1}) {
|
|
// ok
|
|
} else {
|
|
panic("wrong4")
|
|
}
|
|
}
|
|
|
|
type T struct {
|
|
V int
|
|
}
|
|
|
|
var X = T{}.V
|
|
|
|
func f2() {
|
|
var x = T{}.V
|
|
if x != 0 {
|
|
panic("wrongx")
|
|
}
|
|
if X != 0 {
|
|
panic("wrongX")
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
f1()
|
|
f2()
|
|
}
|