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 @a_linear_impl_fig_1() nounwind { 100: 11 br label %"1" 121: 13 br label %"2" 142: 15 br label %"3" 163: 17 br i1 1, label %"13", label %"4" 184: 19 br i1 1, label %"5", label %"1" 205: 21 br i1 1, label %"8", label %"6" 226: 23 br i1 1, label %"7", label %"4" 247: 25 ret void 268: 27 br i1 1, label %"9", label %"1" 289: 29 br label %"10" 3010: 31 br i1 1, label %"12", label %"11" 3211: 33 br i1 1, label %"9", label %"8" 3413: 35 br i1 1, label %"2", label %"1" 3612: 37 switch i32 0, label %"1" [ i32 0, label %"9" 38 i32 1, label %"8"] 39} 40 41; CHECK-NOT: => 42; CHECK: [0] 0 => <Function Return> 43; CHECK-NEXT: [1] 1 => 7 44; CHECK-NEXT: [2] 1 => 4 45; CHECK-NEXT: [2] 8 => 1 46 47; STAT: 4 region - The # of regions 48; STAT: 1 region - The # of simple regions 49 50; BBIT: 0, 1, 2, 3, 13, 4, 5, 8, 9, 10, 12, 11, 6, 7, 51; BBIT: 1, 2, 3, 13, 4, 5, 8, 9, 10, 12, 11, 6, 52; BBIT: 1, 2, 3, 13, 53; BBIT: 8, 9, 10, 12, 11, 54 55; RNIT: 0, 1 => 7, 7, 56; RNIT: 1 => 4, 4, 5, 8 => 1, 6, 57; RNIT: 1, 2, 3, 13, 58; RNIT: 8, 9, 10, 12, 11, 59