|  | ; RUN: opt < %s -simplifycfg -S | \ | 
|  | ; RUN:   not grep " switch" | 
|  | ; PR10131 | 
|  |  | 
|  | ; ModuleID = '<stdin>' | 
|  | target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32" | 
|  | target triple = "i386-pc-linux-gnu" | 
|  |  | 
|  | define i32 @t(i32 %m) nounwind readnone { | 
|  | entry: | 
|  | switch i32 %m, label %sw.bb4 [ | 
|  | i32 0, label %sw.bb0 | 
|  | i32 1, label %sw.bb1 | 
|  | i32 2, label %sw.bb2 | 
|  | i32 3, label %sw.bb3 | 
|  | ] | 
|  |  | 
|  | sw.bb0:                                           ; preds = %entry | 
|  | br label %return | 
|  |  | 
|  | sw.bb1:                                           ; preds = %entry | 
|  | br label %return | 
|  |  | 
|  | sw.bb2:                                           ; preds = %entry | 
|  | br label %return | 
|  |  | 
|  | sw.bb3:                                           ; preds = %entry | 
|  | br label %return | 
|  |  | 
|  | sw.bb4:                                           ; preds = %entry | 
|  | br label %return | 
|  |  | 
|  | return:                                           ; preds = %entry, %sw.bb4, %sw.bb3, %sw.bb2, %sw.bb1 | 
|  | %retval.0 = phi i32 [ 4, %sw.bb4 ], [ 3, %sw.bb3 ], [ 2, %sw.bb2 ], [ 1, %sw.bb1 ], [ 0, %sw.bb0 ] | 
|  | ret i32 %retval.0 | 
|  | } |