1 // compile 2 3 // Copyright 2014 The Go Authors. All rights reserved. 4 // Use of this source code is governed by a BSD-style 5 // license that can be found in the LICENSE file. 6 7 // Test that code compiles without 8 // "internal error: ... recorded as live on entry" errors 9 // from the liveness code. 10 // 11 // This code contains methods or other construct that 12 // trigger the generation of wrapper functions with no 13 // clear line number (they end up using line 1), and those 14 // would have annotations printed if we used -live=1, 15 // like the live.go test does. 16 // Instead, this test relies on the fact that the liveness 17 // analysis turns any non-live parameter on entry into 18 // a compile error. Compiling successfully means that bug 19 // has been avoided. 20 21 package main 22 23 // The liveness analysis used to get confused by the tail return 24 // instruction in the wrapper methods generated for T1.M and (*T1).M, 25 // causing a spurious "live at entry: ~r1" for the return result. 26 27 type T struct { 28 } 29 30 func (t *T) M() *int 31 32 type T1 struct { 33 *T 34 } 35 36 // Liveness analysis used to have the VARDEFs in the wrong place, 37 // causing a temporary to appear live on entry. 38 39 func f1(pkg, typ, meth string) { 40 panic("value method " + pkg + "." + typ + "." + meth + " called using nil *" + typ + " pointer") 41 } 42 43 func f2() interface{} { 44 return new(int) 45 } 46 47
