mirror of
https://github.com/golang/go.git
synced 2026-04-03 01:40:30 +09:00
2a1d605e7f
When creating a dynamically-sized slice, the compiler attempts to use a stack-allocated buffer if the slice does not escape and its buffer size is ≤ 32 bytes. In this case, the SSA will contain a (OpPhi (OpSliceMake) (OpSliceMake)) value: one OpSliceMake uses the stack-allocated buffer, and the other uses the heap-allocated buffer. The len and cap arguments for these two OpSliceMake values are expected to be identical. This CL enables the prove pass to recognize this scenario and handle OpSliceLen and OpSliceCap as intended. Fixes #77375 Change-Id: Id77a2473caf66d366f5c94108aa6cb6d3df5b887 Reviewed-on: https://go-review.googlesource.com/c/go/+/740840 Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Junyang Shao <shaojunyang@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Auto-Submit: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com>
40 lines
514 B
Go
40 lines
514 B
Go
// asmcheck
|
|
|
|
// Copyright 2026 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
|
|
|
|
func Range(n int) []int {
|
|
m := make([]int, n)
|
|
|
|
for i := 0; i < n; i++ {
|
|
m[i] = i
|
|
}
|
|
|
|
for i := range n {
|
|
m[i] = i
|
|
}
|
|
|
|
for i := range len(m) {
|
|
m[i] = i
|
|
}
|
|
|
|
for i := range m {
|
|
m[i] = i
|
|
}
|
|
|
|
return m
|
|
}
|
|
|
|
func F(size int) {
|
|
// amd64:-`.*panicBounds`
|
|
// arm64:-`.*panicBounds`
|
|
Range(size)
|
|
}
|
|
|
|
func main() {
|
|
F(-1)
|
|
}
|