1; RUN: opt -S < %s -loop-unroll -block-freq | FileCheck %s 2; RUN: opt -S < %s -passes='require<opt-remark-emit>,unroll,require<block-freq>' | FileCheck %s 3; Crasher from PR20987. 4 5; CHECK: define void @update_loop_info_in_subloops 6; CHECK: entry: 7; CHECK: L: 8; CHECK: L.inner: 9; CHECK: L.inner.latch: 10; CHECK: L.latch: 11; CHECK: L.inner.1: 12; CHECK: L.inner.latch.1: 13; CHECK: L.latch.1: 14 15define void @update_loop_info_in_subloops() { 16entry: 17 br label %L 18 19L: 20 %0 = phi i64 [ 1, %entry ], [ %1, %L.latch ] 21 br label %L.inner 22 23L.inner: 24 br label %L.inner.latch 25 26L.inner.latch: 27 br i1 false, label %L.latch, label %L.inner 28 29L.latch: 30 %1 = add i64 %0, 1 31 %2 = icmp eq i64 %1, 3 32 br i1 %2, label %exit, label %L 33 34exit: 35 ret void 36} 37