1 // run 2 3 // Copyright 2012 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 // Issue 4138: bug in floating-point registers numbering. 8 // Makes 6g unable to use more than 11 registers. 9 10 package main 11 12 func formula() float32 { 13 mA := [1]float32{1.0} 14 det1 := mA[0] 15 det2 := mA[0] 16 det3 := mA[0] 17 det4 := mA[0] 18 det5 := mA[0] 19 det6 := mA[0] 20 det7 := mA[0] 21 det8 := mA[0] 22 det9 := mA[0] 23 det10 := mA[0] 24 det11 := mA[0] 25 det12 := mA[0] 26 27 return det1 + det2*det3 + 28 det4*det5 + det6*det7 + 29 det8*det9 + det10*det11 + 30 det12 31 } 32 33 func main() { 34 x := formula() 35 if x != 7.0 { 36 println(x, 7.0) 37 panic("x != 7.0") 38 } 39 } 40
