| 1 | // Copyright 2022 The Go Authors. All rights reserved. |
|---|---|
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | // Test interpretation on 32 bit widths. |
| 6 | |
| 7 | package main |
| 8 | |
| 9 | func main() { |
| 10 | mapSize() |
| 11 | } |
| 12 | |
| 13 | func mapSize() { |
| 14 | // Tests for the size argument of make on a map type. |
| 15 | const tooBigFor32 = 1<<33 - 1 |
| 16 | wantPanic( |
| 17 | func() { |
| 18 | _ = make(map[int]int, int64(tooBigFor32)) |
| 19 | }, |
| 20 | "runtime error: ssa.MakeMap.Reserve value 8589934591 does not fit in int", |
| 21 | ) |
| 22 | |
| 23 | // TODO: Enable the following if sizeof(int) can be different for host and target. |
| 24 | // _ = make(map[int]int, tooBigFor32) |
| 25 | // |
| 26 | // Second arg to make in `make(map[int]int, tooBigFor32)` is an untyped int and |
| 27 | // is converted into an int explicitly in ssa. |
| 28 | // This has a different value on 32 and 64 bit systems. |
| 29 | } |
| 30 | |
| 31 | func wantPanic(fn func(), s string) { |
| 32 | defer func() { |
| 33 | err := recover() |
| 34 | if err == nil { |
| 35 | panic("expected panic") |
| 36 | } |
| 37 | if got := err.(error).Error(); got != s { |
| 38 | panic("expected panic " + s + " got " + got) |
| 39 | } |
| 40 | }() |
| 41 | fn() |
| 42 | } |
| 43 |
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