1 // Copyright 2015 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 // chan_ssa.go tests chan operations. 6 package main 7 8 import "fmt" 9 10 var failed = false 11 12 //go:noinline 13 func lenChan_ssa(v chan int) int { 14 return len(v) 15 } 16 17 //go:noinline 18 func capChan_ssa(v chan int) int { 19 return cap(v) 20 } 21 22 func testLenChan() { 23 24 v := make(chan int, 10) 25 v <- 1 26 v <- 1 27 v <- 1 28 29 if want, got := 3, lenChan_ssa(v); got != want { 30 fmt.Printf("expected len(chan) = %d, got %d", want, got) 31 failed = true 32 } 33 } 34 35 func testLenNilChan() { 36 37 var v chan int 38 if want, got := 0, lenChan_ssa(v); got != want { 39 fmt.Printf("expected len(nil) = %d, got %d", want, got) 40 failed = true 41 } 42 } 43 44 func testCapChan() { 45 46 v := make(chan int, 25) 47 48 if want, got := 25, capChan_ssa(v); got != want { 49 fmt.Printf("expected cap(chan) = %d, got %d", want, got) 50 failed = true 51 } 52 } 53 54 func testCapNilChan() { 55 56 var v chan int 57 if want, got := 0, capChan_ssa(v); got != want { 58 fmt.Printf("expected cap(nil) = %d, got %d", want, got) 59 failed = true 60 } 61 } 62 63 func main() { 64 testLenChan() 65 testLenNilChan() 66 67 testCapChan() 68 testCapNilChan() 69 70 if failed { 71 panic("failed") 72 } 73 } 74
