diff options
Diffstat (limited to 'test/abi/many_intstar_input.go')
-rw-r--r-- | test/abi/many_intstar_input.go | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/test/abi/many_intstar_input.go b/test/abi/many_intstar_input.go new file mode 100644 index 0000000..b209c80 --- /dev/null +++ b/test/abi/many_intstar_input.go @@ -0,0 +1,45 @@ +// run + +//go:build !wasm +// +build !wasm + +// Copyright 2021 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. + +// wasm is excluded because the compiler chatter about register abi pragma ends up +// on stdout, and causes the expected output to not match. + +package main + +import ( + "fmt" +) + +var sink int = 3 + +//go:registerparams +//go:noinline +func F(a, b, c, d, e, f *int) { + G(f, e, d, c, b, a) + sink += *a // *a == 6 after swapping in G +} + +//go:registerparams +//go:noinline +func G(a, b, c, d, e, f *int) { + var scratch [1000 * 100]int + scratch[*a] = *f // scratch[6] = 1 + fmt.Println(*a, *b, *c, *d, *e, *f) // Forces it to spill b + sink = scratch[*b+1] // scratch[5+1] == 1 + *f, *a = *a, *f + *e, *b = *b, *e + *d, *c = *c, *d +} + +func main() { + a, b, c, d, e, f := 1, 2, 3, 4, 5, 6 + F(&a, &b, &c, &d, &e, &f) + fmt.Println(a, b, c, d, e, f) + fmt.Println(sink) +} |