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go/test/codegen/mapaccess.go

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cmd/compile: avoid mapaccess at m[k]=append(m[k].. Currently rvalue m[k] is transformed during walk into: tmp1 := *mapaccess(m, k) tmp2 := append(tmp1, ...) *mapassign(m, k) = tmp2 However, this is suboptimal, as we could instead produce just: tmp := mapassign(m, k) *tmp := append(*tmp, ...) Optimization is possible only if during Order it may tell that m[k] is exactly the same at left and right part of assignment. It doesn't work: 1) m[f(k)] = append(m[f(k)], ...) 2) sink, m[k] = sink, append(m[k]...) 3) m[k] = append(..., m[k],...) Benchmark: name old time/op new time/op delta MapAppendAssign/Int32/256-8 33.5ns ± 3% 22.4ns ±10% -33.24% (p=0.000 n=16+18) MapAppendAssign/Int32/65536-8 68.2ns ± 6% 48.5ns ±29% -28.90% (p=0.000 n=20+20) MapAppendAssign/Int64/256-8 34.3ns ± 4% 23.3ns ± 5% -32.23% (p=0.000 n=17+18) MapAppendAssign/Int64/65536-8 65.9ns ± 7% 61.2ns ±19% -7.06% (p=0.002 n=18+20) MapAppendAssign/Str/256-8 116ns ±12% 79ns ±16% -31.70% (p=0.000 n=20+19) MapAppendAssign/Str/65536-8 134ns ±15% 111ns ±45% -16.95% (p=0.000 n=19+20) name old alloc/op new alloc/op delta MapAppendAssign/Int32/256-8 47.0B ± 0% 46.0B ± 0% -2.13% (p=0.000 n=19+18) MapAppendAssign/Int32/65536-8 27.0B ± 0% 20.7B ±30% -23.33% (p=0.000 n=20+20) MapAppendAssign/Int64/256-8 47.0B ± 0% 46.0B ± 0% -2.13% (p=0.000 n=20+17) MapAppendAssign/Int64/65536-8 27.0B ± 0% 27.0B ± 0% ~ (all equal) MapAppendAssign/Str/256-8 94.0B ± 0% 78.0B ± 0% -17.02% (p=0.000 n=20+16) MapAppendAssign/Str/65536-8 54.0B ± 0% 54.0B ± 0% ~ (all equal) Fixes #24364 Updates #5147 Change-Id: Id257d052b75b9a445b4885dc571bf06ce6f6b409 Reviewed-on: https://go-review.googlesource.com/100838 Reviewed-by: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-03-14 08:16:43 +00:00
// 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
// These tests check that mapaccess calls are not used.
// Issues #23661 and #24364.
func mapCompoundAssignmentInt8() {
m := make(map[int8]int8, 0)
var k int8 = 0
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] += 67
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] -= 123
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] *= 45
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] |= 78
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] ^= 89
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] <<= 9
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] >>= 10
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k]++
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k]--
}
func mapCompoundAssignmentInt32() {
m := make(map[int32]int32, 0)
var k int32 = 0
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] += 67890
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] -= 123
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] *= 456
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] |= 78
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] ^= 89
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] <<= 9
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] >>= 10
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k]++
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k]--
}
func mapCompoundAssignmentInt64() {
m := make(map[int64]int64, 0)
var k int64 = 0
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] += 67890
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] -= 123
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] *= 456
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] |= 78
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] ^= 89
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] <<= 9
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] >>= 10
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k]++
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k]--
}
func mapCompoundAssignmentComplex128() {
m := make(map[complex128]complex128, 0)
var k complex128 = 0
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] += 67890
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] -= 123
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] *= 456
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k]++
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k]--
}
func mapCompoundAssignmentString() {
m := make(map[string]string, 0)
var k string = "key"
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] += "value"
}
var sinkAppend bool
// TODO: optimization is not applied because of mapslow flag.
func mapAppendAssignmentInt8() {
m := make(map[int8][]int8, 0)
var k int8 = 0
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(m[k], 1)
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(m[k], 1, 2, 3)
a := []int8{7, 8, 9, 0}
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(m[k], a...)
// Exceptions
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(a, m[k]...)
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
sinkAppend, m[k] = !sinkAppend, append(m[k], 99)
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(m[k+1], 100)
}
func mapAppendAssignmentInt32() {
m := make(map[int32][]int32, 0)
var k int32 = 0
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] = append(m[k], 1)
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] = append(m[k], 1, 2, 3)
a := []int32{7, 8, 9, 0}
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] = append(m[k], a...)
// Exceptions
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(a, m[k]...)
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
sinkAppend, m[k] = !sinkAppend, append(m[k], 99)
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(m[k+1], 100)
}
func mapAppendAssignmentInt64() {
m := make(map[int64][]int64, 0)
var k int64 = 0
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] = append(m[k], 1)
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] = append(m[k], 1, 2, 3)
a := []int64{7, 8, 9, 0}
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] = append(m[k], a...)
// Exceptions
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(a, m[k]...)
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
sinkAppend, m[k] = !sinkAppend, append(m[k], 99)
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(m[k+1], 100)
}
// TODO: optimization is not applied because of mapslow flag.
func mapAppendAssignmentComplex128() {
m := make(map[complex128][]complex128, 0)
var k complex128 = 0
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(m[k], 1)
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(m[k], 1, 2, 3)
a := []complex128{7, 8, 9, 0}
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(m[k], a...)
// Exceptions
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(a, m[k]...)
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
sinkAppend, m[k] = !sinkAppend, append(m[k], 99)
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(m[k+1], 100)
}
func mapAppendAssignmentString() {
m := make(map[string][]string, 0)
var k string = "key"
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] = append(m[k], "1")
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] = append(m[k], "1", "2", "3")
a := []string{"7", "8", "9", "0"}
// 386:-".*mapaccess"
// amd64:-".*mapaccess"
// arm:-".*mapaccess"
// arm64:-".*mapaccess"
m[k] = append(m[k], a...)
// Exceptions
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(a, m[k]...)
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
sinkAppend, m[k] = !sinkAppend, append(m[k], "99")
// 386:".*mapaccess"
// amd64:".*mapaccess"
// arm:".*mapaccess"
// arm64:".*mapaccess"
m[k] = append(m[k+"1"], "100")
}
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