|  | ; RUN: opt < %s -loop-unswitch -disable-output | 
|  |  | 
|  | define void @init_caller_save() { | 
|  | entry: | 
|  | br label %cond_true78 | 
|  | cond_next20:		; preds = %cond_true64 | 
|  | br label %bb31 | 
|  | bb31:		; preds = %cond_true64, %cond_true64, %cond_next20 | 
|  | %iftmp.29.1 = phi i32 [ 0, %cond_next20 ], [ 0, %cond_true64 ], [ 0, %cond_true64 ]		; <i32> [#uses=0] | 
|  | br label %bb54 | 
|  | bb54:		; preds = %cond_true78, %bb31 | 
|  | br i1 false, label %bb75, label %cond_true64 | 
|  | cond_true64:		; preds = %bb54 | 
|  | switch i32 %i.0.0, label %cond_next20 [ | 
|  | i32 17, label %bb31 | 
|  | i32 18, label %bb31 | 
|  | ] | 
|  | bb75:		; preds = %bb54 | 
|  | %tmp74.0 = add i32 %i.0.0, 1		; <i32> [#uses=1] | 
|  | br label %cond_true78 | 
|  | cond_true78:		; preds = %bb75, %entry | 
|  | %i.0.0 = phi i32 [ 0, %entry ], [ %tmp74.0, %bb75 ]		; <i32> [#uses=2] | 
|  | br label %bb54 | 
|  | } | 
|  |  |