; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt -passes=gvn -S < %s | FileCheck %s --check-prefixes=CHECK,MDEP
; RUN: opt -passes='gvn<memoryssa>' -S < %s | FileCheck %s --check-prefixes=CHECK,MSSA

target datalayout = "e-p:64:64:64"

; GVN should preserve the TBAA tag on loads when doing PRE.

define void @test(ptr %P, ptr %Q, i1 %arg) nounwind {
; CHECK-LABEL: define void @test(
; CHECK-SAME: ptr [[P:%.*]], ptr [[Q:%.*]], i1 [[ARG:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br i1 [[ARG]], label %[[BB_NPH:.*]], label %[[FOR_END:.*]]
; CHECK:       [[BB_NPH]]:
; CHECK-NEXT:    [[TMP33_PRE:%.*]] = load i16, ptr [[P]], align 2, !tbaa [[SHORT_TBAA0:![0-9]+]]
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[TMP33:%.*]] = phi i16 [ 0, %[[FOR_BODY]] ], [ [[TMP33_PRE]], %[[BB_NPH]] ]
; CHECK-NEXT:    store i16 [[TMP33]], ptr [[Q]], align 2
; CHECK-NEXT:    store i16 0, ptr [[P]], align 2, !tbaa [[SHORT_TBAA0]]
; CHECK-NEXT:    br i1 false, label %[[FOR_BODY_FOR_END_CRIT_EDGE:.*]], label %[[FOR_BODY]]
; CHECK:       [[FOR_BODY_FOR_END_CRIT_EDGE]]:
; CHECK-NEXT:    br label %[[FOR_END]]
; CHECK:       [[FOR_END]]:
; CHECK-NEXT:    ret void
;
entry:
  br i1 %arg, label %bb.nph, label %for.end

bb.nph:                                           ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body, %bb.nph
  %tmp33 = load i16, ptr %P, align 2, !tbaa !0
  store i16 %tmp33, ptr %Q

  store i16 0, ptr %P, align 2, !tbaa !0
  br i1 false, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
}

!0 = !{!3, !3, i64 0}
!1 = !{!"omnipotent char", !2}
!2 = !{!"Simple C/C++ TBAA"}
!3 = !{!"short", !1}
;.
; CHECK: [[SHORT_TBAA0]] = !{[[META1:![0-9]+]], [[META1]], i64 0}
; CHECK: [[META1]] = !{!"short", [[META2:![0-9]+]]}
; CHECK: [[META2]] = !{!"omnipotent char", [[META3:![0-9]+]]}
; CHECK: [[META3]] = !{!"Simple C/C++ TBAA"}
;.
;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
; MDEP: {{.*}}
; MSSA: {{.*}}