; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt < %s -passes=loop-reduce,loop-term-fold -S | FileCheck %s ; This test used to crash due to matchSimpleRecurrence matching the simple ; recurrence in pn-loop when evaluating unrelated-loop. Since unrelated-loop ; cannot jump to pn-node isAlmostDeadIV panics. define void @phi_node_different_bb() { ; CHECK-LABEL: @phi_node_different_bb( ; CHECK-NEXT: br label [[PN_LOOP:%.*]] ; CHECK: pn-loop: ; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ 1, [[TMP0:%.*]] ], [ [[TMP2:%.*]], [[PN_LOOP]] ] ; CHECK-NEXT: [[TMP2]] = add i32 [[TMP1]], 1 ; CHECK-NEXT: [[TMP3:%.*]] = icmp ugt i32 [[TMP2]], 1 ; CHECK-NEXT: br i1 [[TMP3]], label [[PN_LOOP]], label [[UNRELATED_LOOP_PREHEADER:%.*]] ; CHECK: unrelated-loop.preheader: ; CHECK-NEXT: [[DOTLCSSA:%.*]] = phi i32 [ [[TMP2]], [[PN_LOOP]] ] ; CHECK-NEXT: br label [[UNRELATED_LOOP:%.*]] ; CHECK: unrelated-loop: ; CHECK-NEXT: [[TMP4:%.*]] = icmp eq i32 [[DOTLCSSA]], 0 ; CHECK-NEXT: br i1 [[TMP4]], label [[END:%.*]], label [[UNRELATED_LOOP]] ; CHECK: end: ; CHECK-NEXT: ret void ; br label %pn-loop pn-loop: ; preds = %pn-loop, %0 %1 = phi i32 [ 1, %0 ], [ %2, %pn-loop ] %2 = add i32 %1, 1 %3 = icmp ugt i32 %2, 1 br i1 %3, label %pn-loop, label %unrelated-loop.preheader unrelated-loop.preheader: ; preds = %pn-loop br label %unrelated-loop unrelated-loop: ; preds = %unrelated-loop, %unrelated-loop.preheader %4 = icmp eq i32 %2, 0 br i1 %4, label %end, label %unrelated-loop end: ; preds = %unrelated-loop ret void }