| // compile | |
| // Copyright 2014 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. | |
| // Test that code compiles without | |
| // "internal error: ... recorded as live on entry" errors | |
| // from the liveness code. | |
| // | |
| // This code contains methods or other construct that | |
| // trigger the generation of wrapper functions with no | |
| // clear line number (they end up using line 1), and those | |
| // would have annotations printed if we used -live=1, | |
| // like the live.go test does. | |
| // Instead, this test relies on the fact that the liveness | |
| // analysis turns any non-live parameter on entry into | |
| // a compile error. Compiling successfully means that bug | |
| // has been avoided. | |
| package main | |
| // The liveness analysis used to get confused by the tail return | |
| // instruction in the wrapper methods generated for T1.M and (*T1).M, | |
| // causing a spurious "live at entry: ~r1" for the return result. | |
| type T struct { | |
| } | |
| func (t *T) M() *int | |
| type T1 struct { | |
| *T | |
| } | |
| // Liveness analysis used to have the VARDEFs in the wrong place, | |
| // causing a temporary to appear live on entry. | |
| func f1(pkg, typ, meth string) { | |
| panic("value method " + pkg + "." + typ + "." + meth + " called using nil *" + typ + " pointer") | |
| } | |
| func f2() interface{} { | |
| return new(int) | |
| } | |