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125 lines
2.8 KiB
125 lines
2.8 KiB
4 months ago
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// asmcheck
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package codegen
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// This file contains code generation tests related to the handling of
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// map types.
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// ------------------- //
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// Access Const //
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// ------------------- //
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// Direct use of constants in fast map access calls (Issue #19015).
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func AccessInt1(m map[int]int) int {
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// amd64:"MOVQ\t[$]5"
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return m[5]
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}
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func AccessInt2(m map[int]int) bool {
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// amd64:"MOVQ\t[$]5"
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_, ok := m[5]
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return ok
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}
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func AccessString1(m map[string]int) int {
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// amd64:`.*"abc"`
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return m["abc"]
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}
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func AccessString2(m map[string]int) bool {
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// amd64:`.*"abc"`
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_, ok := m["abc"]
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return ok
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}
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// ------------------- //
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// String Conversion //
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// ------------------- //
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func LookupStringConversionSimple(m map[string]int, bytes []byte) int {
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// amd64:-`.*runtime\.slicebytetostring\(`
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return m[string(bytes)]
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}
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func LookupStringConversionStructLit(m map[struct{ string }]int, bytes []byte) int {
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// amd64:-`.*runtime\.slicebytetostring\(`
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return m[struct{ string }{string(bytes)}]
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}
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func LookupStringConversionArrayLit(m map[[2]string]int, bytes []byte) int {
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// amd64:-`.*runtime\.slicebytetostring\(`
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return m[[2]string{string(bytes), string(bytes)}]
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}
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func LookupStringConversionNestedLit(m map[[1]struct{ s [1]string }]int, bytes []byte) int {
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// amd64:-`.*runtime\.slicebytetostring\(`
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return m[[1]struct{ s [1]string }{struct{ s [1]string }{s: [1]string{string(bytes)}}}]
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}
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func LookupStringConversionKeyedArrayLit(m map[[2]string]int, bytes []byte) int {
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// amd64:-`.*runtime\.slicebytetostring\(`
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return m[[2]string{0: string(bytes)}]
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}
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// ------------------- //
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// Map Clear //
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// ------------------- //
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// Optimization of map clear idiom (Issue #20138).
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func MapClearReflexive(m map[int]int) {
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// amd64:`.*runtime\.mapclear`
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// amd64:-`.*runtime\.mapiterinit`
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for k := range m {
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delete(m, k)
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}
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}
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func MapClearIndirect(m map[int]int) {
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s := struct{ m map[int]int }{m: m}
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// amd64:`.*runtime\.mapclear`
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// amd64:-`.*runtime\.mapiterinit`
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for k := range s.m {
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delete(s.m, k)
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}
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}
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func MapClearPointer(m map[*byte]int) {
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// amd64:`.*runtime\.mapclear`
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// amd64:-`.*runtime\.mapiterinit`
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for k := range m {
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delete(m, k)
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}
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}
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func MapClearNotReflexive(m map[float64]int) {
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// amd64:`.*runtime\.mapiterinit`
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// amd64:-`.*runtime\.mapclear`
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for k := range m {
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delete(m, k)
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}
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}
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func MapClearInterface(m map[interface{}]int) {
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// amd64:`.*runtime\.mapiterinit`
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// amd64:-`.*runtime\.mapclear`
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for k := range m {
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delete(m, k)
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}
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}
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func MapClearSideEffect(m map[int]int) int {
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k := 0
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// amd64:`.*runtime\.mapiterinit`
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// amd64:-`.*runtime\.mapclear`
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for k = range m {
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delete(m, k)
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}
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return k
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}
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