1;RUN: opt < %s -analyze -dot-cfg-only 2>/dev/null 2;RUN: opt < %s -analyze -passes=dot-cfg-only 2>/dev/null 3;PR 1497 4 5define void @foo() { 6entry: 7 br label %return 8 9return: ; preds = %entry 10 ret void 11} 12 13