1 ; RUN: opt -regions -analyze < %s | FileCheck %s 2 ; RUN: opt < %s -passes='print<regions>' 2>&1 | FileCheck %s 3 4 ; We should not crash if there are some bbs that are not reachable. 5 define void @f() { 6 entry: 7 br label %for.pre 8 9 notintree: ; No predecessors! 10 br label %ret 11 12 for.pre: ; preds = %entry 13 br label %for 14 15 for: ; preds = %for.inc, %for.pre 16 %indvar = phi i64 [ 0, %for.pre ], [ %indvar.next, %for.inc ] 17 %exitcond = icmp ne i64 %indvar, 200 18 br i1 %exitcond, label %for.inc, label %ret 19 20 for.inc: ; preds = %for 21 %indvar.next = add i64 %indvar, 1 22 br label %for 23 24 ret: ; preds = %for, %notintree 25 ret void 26 } 27 28 ; CHECK: [0] entry => <Function Return> 29 ; CHECK: [1] for => ret 30 31
