3edcdb5f0d
Closure variables are allocated in a parent function and are thus never nil. Don't do a nil check before reading or modifying the value. This commit results in a slight reduction in code size in some test cases: calls.go, channel.go, goroutines.go, json.go, sort.go - presumably wherever closures are used.
84 строки
1,7 КиБ
Go
84 строки
1,7 КиБ
Go
package main
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func main() {
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n1 := 5
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derefInt(&n1)
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// This should eventually be modified to not escape.
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n2 := 6 // OUT: object allocated on the heap: escapes at line 9
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returnIntPtr(&n2)
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s1 := make([]int, 3)
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readIntSlice(s1)
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s2 := [3]int{}
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readIntSlice(s2[:])
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// This should also be modified to not escape.
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s3 := make([]int, 3) // OUT: object allocated on the heap: escapes at line 19
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returnIntSlice(s3)
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_ = make([]int, getUnknownNumber()) // OUT: object allocated on the heap: size is not constant
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s4 := make([]byte, 300) // OUT: object allocated on the heap: object size 300 exceeds maximum stack allocation size 256
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readByteSlice(s4)
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s5 := make([]int, 4) // OUT: object allocated on the heap: escapes at line 27
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_ = append(s5, 5)
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s6 := make([]int, 3)
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s7 := []int{1, 2, 3}
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copySlice(s6, s7)
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c1 := getComplex128() // OUT: object allocated on the heap: escapes at line 34
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useInterface(c1)
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n3 := 5
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func() int {
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return n3
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}()
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callVariadic(3, 5, 8) // OUT: object allocated on the heap: escapes at line 41
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s8 := []int{3, 5, 8} // OUT: object allocated on the heap: escapes at line 44
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callVariadic(s8...)
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n4 := 3 // OUT: object allocated on the heap: escapes at line 48
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n5 := 7 // OUT: object allocated on the heap: escapes at line 48
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func() {
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n4 = n5
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}()
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println(n4, n5)
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}
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func derefInt(x *int) int {
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return *x
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}
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func returnIntPtr(x *int) *int {
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return x
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}
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func readIntSlice(s []int) int {
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return s[1]
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}
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func readByteSlice(s []byte) byte {
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return s[1]
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}
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func returnIntSlice(s []int) []int {
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return s
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}
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func getUnknownNumber() int
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func copySlice(out, in []int) {
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copy(out, in)
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}
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func getComplex128() complex128
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func useInterface(interface{})
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func callVariadic(...int)
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