; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt < %s -passes=loop-interchange -loop-interchange-profitabilities=ignore -S | FileCheck %s

; Ensure that we can handle LCSSA PHI whose incoming value is not an
; instruction.

define i32 @f() {
; CHECK-LABEL: define i32 @f() {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br label %[[INNER_PREHEADER:.*]]
; CHECK:       [[OUTER_HEADER_PREHEADER:.*]]:
; CHECK-NEXT:    br label %[[OUTER_HEADER:.*]]
; CHECK:       [[OUTER_HEADER]]:
; CHECK-NEXT:    [[I:%.*]] = phi i64 [ [[I_NEXT:%.*]], %[[OUTER_LATCH:.*]] ], [ 0, %[[OUTER_HEADER_PREHEADER]] ]
; CHECK-NEXT:    br label %[[INNER_SPLIT1:.*]]
; CHECK:       [[INNER_PREHEADER]]:
; CHECK-NEXT:    br label %[[INNER:.*]]
; CHECK:       [[INNER]]:
; CHECK-NEXT:    [[J:%.*]] = phi i64 [ [[TMP0:%.*]], %[[INNER_SPLIT:.*]] ], [ 0, %[[INNER_PREHEADER]] ]
; CHECK-NEXT:    br label %[[OUTER_HEADER_PREHEADER]]
; CHECK:       [[INNER_SPLIT1]]:
; CHECK-NEXT:    [[J_NEXT:%.*]] = add i64 [[J]], 1
; CHECK-NEXT:    [[EC_J:%.*]] = icmp eq i64 [[J_NEXT]], 2
; CHECK-NEXT:    br label %[[INNER_EXIT:.*]]
; CHECK:       [[INNER_SPLIT]]:
; CHECK-NEXT:    [[TMP0]] = add i64 [[J]], 1
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i64 [[TMP0]], 2
; CHECK-NEXT:    br i1 [[TMP1]], label %[[EXIT:.*]], label %[[INNER]]
; CHECK:       [[INNER_EXIT]]:
; CHECK-NEXT:    br label %[[OUTER_LATCH]]
; CHECK:       [[OUTER_LATCH]]:
; CHECK-NEXT:    [[I_NEXT]] = add i64 [[I]], 1
; CHECK-NEXT:    [[EC_I:%.*]] = icmp eq i64 [[I_NEXT]], 2
; CHECK-NEXT:    br i1 [[EC_I]], label %[[INNER_SPLIT]], label %[[OUTER_HEADER]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[CST_LCSSA:%.*]] = phi i32 [ 42, %[[INNER_SPLIT]] ]
; CHECK-NEXT:    ret i32 [[CST_LCSSA]]
;
entry:
  br label %outer.header

outer.header:
  %i = phi i64 [ 0, %entry ], [ %i.next, %outer.latch ]
  br label %inner

inner:
  %j = phi i64 [ 0, %outer.header ], [ %j.next, %inner ]
  %j.next = add i64 %j, 1
  %ec.j = icmp eq i64 %j.next, 2
  br i1 %ec.j, label %inner.exit, label %inner

inner.exit:
  %cst = phi i32 [ 42, %inner ]
  br label %outer.latch

outer.latch:
  %i.next = add i64 %i, 1
  %ec.i = icmp eq i64 %i.next, 2
  br i1 %ec.i, label %exit, label %outer.header

exit:
  %cst.lcssa = phi i32 [ %cst, %outer.latch ]
  ret i32 %cst.lcssa
}