1*9880d681SAndroid Build Coastguard Worker; RUN: opt -regions -analyze < %s | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -passes='print<regions>' 2>&1 | FileCheck %s 3*9880d681SAndroid Build Coastguard Worker 4*9880d681SAndroid Build Coastguard Worker; We should not crash if there are some bbs that are not reachable. 5*9880d681SAndroid Build Coastguard Workerdefine void @f() { 6*9880d681SAndroid Build Coastguard Workerentry: 7*9880d681SAndroid Build Coastguard Worker br label %for.pre 8*9880d681SAndroid Build Coastguard Worker 9*9880d681SAndroid Build Coastguard Workernotintree: ; No predecessors! 10*9880d681SAndroid Build Coastguard Worker br label %ret 11*9880d681SAndroid Build Coastguard Worker 12*9880d681SAndroid Build Coastguard Workerfor.pre: ; preds = %entry 13*9880d681SAndroid Build Coastguard Worker br label %for 14*9880d681SAndroid Build Coastguard Worker 15*9880d681SAndroid Build Coastguard Workerfor: ; preds = %for.inc, %for.pre 16*9880d681SAndroid Build Coastguard Worker %indvar = phi i64 [ 0, %for.pre ], [ %indvar.next, %for.inc ] 17*9880d681SAndroid Build Coastguard Worker %exitcond = icmp ne i64 %indvar, 200 18*9880d681SAndroid Build Coastguard Worker br i1 %exitcond, label %for.inc, label %ret 19*9880d681SAndroid Build Coastguard Worker 20*9880d681SAndroid Build Coastguard Workerfor.inc: ; preds = %for 21*9880d681SAndroid Build Coastguard Worker %indvar.next = add i64 %indvar, 1 22*9880d681SAndroid Build Coastguard Worker br label %for 23*9880d681SAndroid Build Coastguard Worker 24*9880d681SAndroid Build Coastguard Workerret: ; preds = %for, %notintree 25*9880d681SAndroid Build Coastguard Worker ret void 26*9880d681SAndroid Build Coastguard Worker} 27*9880d681SAndroid Build Coastguard Worker 28*9880d681SAndroid Build Coastguard Worker; CHECK: [0] entry => <Function Return> 29*9880d681SAndroid Build Coastguard Worker; CHECK: [1] for => ret 30*9880d681SAndroid Build Coastguard Worker 31