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master
test/fixedbugs/issue21963.go
27 строк
483 B
Keith Randall
cmd/compile: fix sign-extension merging rules
26 сен 2017, 19:24
26 сен 2017, 19:24
3f04db4
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// run // Copyright 2017 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 main import ( "fmt" "runtime" ) //go:noinline func f(x []int32, y *int8) int32 { c := int32(int16(*y)) runtime.GC() return x[0] * c } func main() { var x = [1]int32{5} var y int8 = -1 if got, want := f(x[:], &y), int32(-5); got != want { panic(fmt.Sprintf("wanted %d, got %d", want, got)) } }