1; REQUIRES: asserts 2; RUN: opt -regions -analyze < %s | FileCheck %s 3; RUN: opt -regions -stats < %s 2>&1 | FileCheck -check-prefix=STAT %s 4; RUN: opt -regions -print-region-style=bb -analyze < %s 2>&1 | FileCheck -check-prefix=BBIT %s 5; RUN: opt -regions -print-region-style=rn -analyze < %s 2>&1 | FileCheck -check-prefix=RNIT %s 6 7; RUN: opt < %s -passes='print<regions>' 2>&1 | FileCheck %s 8 9define void @meread_() nounwind { 10entry: 11 br label %bb23 12 13bb23: 14 br label %bb.i 15 16bb.i: ; preds = %bb.i, %bb54 17 br label %pflini_.exit 18 19pflini_.exit: ; preds = %bb.i 20 br label %bb58thread-split 21 22bb58thread-split: ; preds = %bb64, %bb61, %pflini_.exit 23 br label %bb58 24 25bb58: ; preds = %bb60, %bb58thread-split 26 br i1 1, label %bb59, label %bb23 27 28bb59: ; preds = %bb58 29 switch i32 1, label %bb60 [ 30 i32 1, label %l98 31 ] 32 33bb60: ; preds = %bb59 34 br i1 1, label %bb61, label %bb58 35 36bb61: ; preds = %bb60 37 br label %bb58thread-split 38 39l98: ; preds = %bb69, %bb59 40 ret void 41} 42; CHECK-NOT: => 43; CHECK: [0] entry => <Function Return> 44; CHECK: [1] bb23 => l98 45; STAT: 2 region - The # of regions 46; STAT: 1 region - The # of simple regions 47 48; BBIT: entry, bb23, bb.i, pflini_.exit, bb58thread-split, bb58, bb59, bb60, bb61, l98, 49; BBIT: bb23, bb.i, pflini_.exit, bb58thread-split, bb58, bb59, bb60, bb61, 50 51; RNIT: entry, bb23 => l98, l98, 52; RNIT: bb23, bb.i, pflini_.exit, bb58thread-split, bb58, bb59, bb60, bb61, 53