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1; REQUIRES: asserts2 3; RUN: opt < %s -passes='print<regions>' 2>&1 | FileCheck %s4; RUN: opt < %s -passes='print<regions>' -stats 2>&1 | FileCheck -check-prefix=STAT %s5; RUN: opt -passes='print<regions>' -print-region-style=bb < %s 2>&1 | FileCheck -check-prefix=BBIT %s6; RUN: opt -passes='print<regions>' -print-region-style=rn < %s 2>&1 | FileCheck -check-prefix=RNIT %s7 8define void @meread_() nounwind {9entry:10 br label %bb2311 12bb23:13 br label %bb.i14 15bb.i: ; preds = %bb.i, %bb5416 br label %pflini_.exit17 18pflini_.exit: ; preds = %bb.i19 br label %bb58thread-split20 21bb58thread-split: ; preds = %bb64, %bb61, %pflini_.exit22 br label %bb5823 24bb58: ; preds = %bb60, %bb58thread-split25 br i1 1, label %bb59, label %bb2326 27bb59: ; preds = %bb5828 switch i32 1, label %bb60 [29 i32 1, label %l9830 ]31 32bb60: ; preds = %bb5933 br i1 1, label %bb61, label %bb5834 35bb61: ; preds = %bb6036 br label %bb58thread-split37 38l98: ; preds = %bb69, %bb5939 ret void40}41; CHECK-NOT: =>42; CHECK: [0] entry => <Function Return>43; CHECK: [1] bb23 => l9844; STAT: 2 region - The # of regions45; STAT: 1 region - The # of simple regions46 47; BBIT: entry, bb23, bb.i, pflini_.exit, bb58thread-split, bb58, bb59, bb60, bb61, l98,48; BBIT: bb23, bb.i, pflini_.exit, bb58thread-split, bb58, bb59, bb60, bb61,49 50; RNIT: entry, bb23 => l98, l98,51; RNIT: bb23, bb.i, pflini_.exit, bb58thread-split, bb58, bb59, bb60, bb61,52