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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:19:13 +0000 |
commit | ccd992355df7192993c666236047820244914598 (patch) | |
tree | f00fea65147227b7743083c6148396f74cd66935 /test/codegen/issue56440.go | |
parent | Initial commit. (diff) | |
download | golang-1.21-ccd992355df7192993c666236047820244914598.tar.xz golang-1.21-ccd992355df7192993c666236047820244914598.zip |
Adding upstream version 1.21.8.upstream/1.21.8
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'test/codegen/issue56440.go')
-rw-r--r-- | test/codegen/issue56440.go | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/test/codegen/issue56440.go b/test/codegen/issue56440.go new file mode 100644 index 0000000..c6c1e66 --- /dev/null +++ b/test/codegen/issue56440.go @@ -0,0 +1,34 @@ +// asmcheck + +// Copyright 2022 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. + +// Check to make sure that we recognize when the length of an append +// is constant. We check this by making sure that the constant length +// is folded into a load offset. + +package p + +func f(x []int) int { + s := make([]int, 3) + s = append(s, 4, 5) + // amd64:`MOVQ\t40\(.*\),` + return x[len(s)] +} + +func g(x []int, p *bool) int { + s := make([]int, 3) + for { + s = s[:3] + if cap(s) < 5 { + s = make([]int, 3, 5) + } + s = append(s, 4, 5) + if *p { + // amd64:`MOVQ\t40\(.*\),` + return x[len(s)] + } + } + return 0 +} |