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// asmcheck
// Copyright 2018 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.
package codegen
// This file contains code generation tests related to the handling of
// map types.
// ------------------- //
// Access Const //
// ------------------- //
// Direct use of constants in fast map access calls (Issue #19015).
func AccessInt1(m map[int]int) int {
// amd64:"MOVQ\t[$]5"
return m[5]
}
func AccessInt2(m map[int]int) bool {
// amd64:"MOVQ\t[$]5"
_, ok := m[5]
return ok
}
func AccessString1(m map[string]int) int {
// amd64:`.*"abc"`
return m["abc"]
}
func AccessString2(m map[string]int) bool {
// amd64:`.*"abc"`
_, ok := m["abc"]
return ok
}
// ------------------- //
// Map Clear //
// ------------------- //
// Optimization of map clear idiom (Issue #20138).
func MapClearReflexive(m map[int]int) {
// amd64:`.*runtime\.mapclear`
// amd64:-`.*runtime\.mapiterinit`
for k := range m {
delete(m, k)
}
}
func MapClearIndirect(m map[int]int) {
s := struct{ m map[int]int }{m: m}
// amd64:`.*runtime\.mapclear`
// amd64:-`.*runtime\.mapiterinit`
for k := range s.m {
delete(s.m, k)
}
}
func MapClearPointer(m map[*byte]int) {
// amd64:`.*runtime\.mapclear`
// amd64:-`.*runtime\.mapiterinit`
for k := range m {
delete(m, k)
}
}
func MapClearNotReflexive(m map[float64]int) {
// amd64:`.*runtime\.mapiterinit`
// amd64:-`.*runtime\.mapclear`
for k := range m {
delete(m, k)
}
}
func MapClearInterface(m map[interface{}]int) {
// amd64:`.*runtime\.mapiterinit`
// amd64:-`.*runtime\.mapclear`
for k := range m {
delete(m, k)
}
}
func MapClearSideEffect(m map[int]int) int {
k := 0
// amd64:`.*runtime\.mapiterinit`
// amd64:-`.*runtime\.mapclear`
for k = range m {
delete(m, k)
}
return k
}
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