; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -force-vector-width=4 -force-vector-interleave=1 -passes='loop-vectorize,loop-load-elim' -S %s | FileCheck %s

@glob.1 = external global [100 x double]
@glob.2 = external global [100 x double]

define void @g(ptr %dst.1, ptr %start, i64 %N) {
; CHECK-LABEL: @g(
; CHECK-NEXT:  loop.1.lver.check:
; CHECK-NEXT:    [[TMP0:%.*]] = shl i64 [[N:%.*]], 3
; CHECK-NEXT:    [[TMP1:%.*]] = add i64 [[TMP0]], 16
; CHECK-NEXT:    [[UGLYGEP:%.*]] = getelementptr i8, ptr @glob.2, i64 [[TMP1]]
; CHECK-NEXT:    [[UGLYGEP2:%.*]] = getelementptr i8, ptr [[DST_1:%.*]], i64 8
; CHECK-NEXT:    [[BOUND0:%.*]] = icmp ult ptr @glob.2, [[UGLYGEP2]]
; CHECK-NEXT:    [[BOUND1:%.*]] = icmp ult ptr [[DST_1]], [[UGLYGEP]]
; CHECK-NEXT:    [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]]
; CHECK-NEXT:    br i1 [[FOUND_CONFLICT]], label [[LOOP_1_PH_LVER_ORIG:%.*]], label [[LOOP_1_PH:%.*]]
; CHECK:       loop.1.ph.lver.orig:
; CHECK-NEXT:    br label [[LOOP_1_LVER_ORIG:%.*]]
; CHECK:       loop.1.lver.orig:
; CHECK-NEXT:    [[IV_LVER_ORIG:%.*]] = phi i64 [ 0, [[LOOP_1_PH_LVER_ORIG]] ], [ [[IV_NEXT_LVER_ORIG:%.*]], [[LOOP_1_LVER_ORIG]] ]
; CHECK-NEXT:    [[PTR_IV_1_LVER_ORIG:%.*]] = phi ptr [ @glob.1, [[LOOP_1_PH_LVER_ORIG]] ], [ [[PTR_IV_1_NEXT_LVER_ORIG:%.*]], [[LOOP_1_LVER_ORIG]] ]
; CHECK-NEXT:    [[GEP_IV_LVER_ORIG:%.*]] = getelementptr inbounds double, ptr @glob.2, i64 [[IV_LVER_ORIG]]
; CHECK-NEXT:    [[L_1_LVER_ORIG:%.*]] = load double, ptr [[GEP_IV_LVER_ORIG]], align 8
; CHECK-NEXT:    [[GEP_IV_1_LVER_ORIG:%.*]] = getelementptr inbounds double, ptr getelementptr inbounds (double, ptr @glob.2, i64 1), i64 [[IV_LVER_ORIG]]
; CHECK-NEXT:    store double 0.000000e+00, ptr [[GEP_IV_1_LVER_ORIG]], align 8
; CHECK-NEXT:    store double 0.000000e+00, ptr [[DST_1]], align 8
; CHECK-NEXT:    [[PTR_IV_1_NEXT_LVER_ORIG]] = getelementptr inbounds double, ptr [[PTR_IV_1_LVER_ORIG]], i64 1
; CHECK-NEXT:    [[IV_NEXT_LVER_ORIG]] = add nuw nsw i64 [[IV_LVER_ORIG]], 1
; CHECK-NEXT:    [[EXITCOND_NOT_LVER_ORIG:%.*]] = icmp eq i64 [[IV_LVER_ORIG]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND_NOT_LVER_ORIG]], label [[LOOP_2_PH_LOOPEXIT:%.*]], label [[LOOP_1_LVER_ORIG]]
; CHECK:       loop.1.ph:
; CHECK-NEXT:    [[LOAD_INITIAL:%.*]] = load double, ptr @glob.2, align 8
; CHECK-NEXT:    br label [[LOOP_1:%.*]]
; CHECK:       loop.1:
; CHECK-NEXT:    [[STORE_FORWARDED:%.*]] = phi double [ [[LOAD_INITIAL]], [[LOOP_1_PH]] ], [ 0.000000e+00, [[LOOP_1]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 0, [[LOOP_1_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP_1]] ]
; CHECK-NEXT:    [[PTR_IV_1:%.*]] = phi ptr [ @glob.1, [[LOOP_1_PH]] ], [ [[PTR_IV_1_NEXT:%.*]], [[LOOP_1]] ]
; CHECK-NEXT:    [[GEP_IV:%.*]] = getelementptr inbounds double, ptr @glob.2, i64 [[IV]]
; CHECK-NEXT:    [[L_1:%.*]] = load double, ptr [[GEP_IV]], align 8
; CHECK-NEXT:    [[GEP_IV_1:%.*]] = getelementptr inbounds double, ptr getelementptr inbounds (double, ptr @glob.2, i64 1), i64 [[IV]]
; CHECK-NEXT:    store double 0.000000e+00, ptr [[GEP_IV_1]], align 8
; CHECK-NEXT:    store double 0.000000e+00, ptr [[DST_1]], align 8
; CHECK-NEXT:    [[PTR_IV_1_NEXT]] = getelementptr inbounds double, ptr [[PTR_IV_1]], i64 1
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND_NOT]], label [[LOOP_2_PH_LOOPEXIT3:%.*]], label [[LOOP_1]]
; CHECK:       loop.2.ph.loopexit:
; CHECK-NEXT:    [[LCSSA_PTR_IV_1_PH:%.*]] = phi ptr [ [[PTR_IV_1_LVER_ORIG]], [[LOOP_1_LVER_ORIG]] ]
; CHECK-NEXT:    br label [[LOOP_2_PH:%.*]]
; CHECK:       loop.2.ph.loopexit3:
; CHECK-NEXT:    [[LCSSA_PTR_IV_1_PH4:%.*]] = phi ptr [ [[PTR_IV_1]], [[LOOP_1]] ]
; CHECK-NEXT:    br label [[LOOP_2_PH]]
; CHECK:       loop.2.ph:
; CHECK-NEXT:    [[LCSSA_PTR_IV_1:%.*]] = phi ptr [ [[LCSSA_PTR_IV_1_PH]], [[LOOP_2_PH_LOOPEXIT]] ], [ [[LCSSA_PTR_IV_1_PH4]], [[LOOP_2_PH_LOOPEXIT3]] ]
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[N]], 4
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
; CHECK-NEXT:    [[TMP2:%.*]] = mul i64 [[N_VEC]], 8
; CHECK-NEXT:    [[IND_END:%.*]] = getelementptr i8, ptr [[LCSSA_PTR_IV_1]], i64 [[TMP2]]
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT:    [[TMP4:%.*]] = mul i64 [[TMP3]], 8
; CHECK-NEXT:    [[NEXT_GEP:%.*]] = getelementptr i8, ptr [[LCSSA_PTR_IV_1]], i64 [[TMP4]]
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr double, ptr [[NEXT_GEP]], i32 0
; CHECK-NEXT:    store <4 x double> zeroinitializer, ptr [[TMP5]], align 8
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP6:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP6]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[LOOP_2_PH]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL1:%.*]] = phi ptr [ [[IND_END]], [[MIDDLE_BLOCK]] ], [ [[LCSSA_PTR_IV_1]], [[LOOP_2_PH]] ]
; CHECK-NEXT:    br label [[LOOP_2:%.*]]
; CHECK:       loop.2:
; CHECK-NEXT:    [[IV_2:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_2_NEXT:%.*]], [[LOOP_2]] ]
; CHECK-NEXT:    [[PTR_IV_2:%.*]] = phi ptr [ [[BC_RESUME_VAL1]], [[SCALAR_PH]] ], [ [[PTR_IV_2_NEXT:%.*]], [[LOOP_2]] ]
; CHECK-NEXT:    store double 0.000000e+00, ptr [[PTR_IV_2]], align 8
; CHECK-NEXT:    [[PTR_IV_2_NEXT]] = getelementptr inbounds double, ptr [[PTR_IV_2]], i64 1
; CHECK-NEXT:    [[IV_2_NEXT]] = add nuw nsw i64 [[IV_2]], 1
; CHECK-NEXT:    [[EXITCOND_1_NOT:%.*]] = icmp eq i64 [[IV_2_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND_1_NOT]], label [[EXIT_LOOPEXIT:%.*]], label [[LOOP_2]], !llvm.loop [[LOOP2:![0-9]+]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop.1

loop.1:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.1 ]
  %ptr.iv.1 = phi ptr [ @glob.1, %entry ], [ %ptr.iv.1.next, %loop.1 ]
  %gep.iv = getelementptr inbounds double, ptr @glob.2, i64 %iv
  %l.1 = load double, ptr %gep.iv, align 8
  %gep.iv.1 = getelementptr inbounds double, ptr getelementptr inbounds (double, ptr @glob.2, i64 1), i64 %iv
  store double 0.000000e+00, ptr %gep.iv.1, align 8
  store double 0.000000e+00, ptr %dst.1, align 8
  %ptr.iv.1.next = getelementptr inbounds double, ptr %ptr.iv.1, i64 1
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond.not = icmp eq i64 %iv, %N
  br i1 %exitcond.not, label %loop.2.ph, label %loop.1

loop.2.ph:
  %lcssa.ptr.iv.1 = phi ptr [ %ptr.iv.1, %loop.1 ]
  br label %loop.2

loop.2:
  %iv.2 = phi i64 [ 0, %loop.2.ph ] , [ %iv.2.next, %loop.2 ]
  %ptr.iv.2 = phi ptr [ %lcssa.ptr.iv.1, %loop.2.ph ], [ %ptr.iv.2.next, %loop.2 ]
  store double 0.000000e+00, ptr %ptr.iv.2, align 8
  %ptr.iv.2.next = getelementptr inbounds double, ptr %ptr.iv.2, i64 1
  %iv.2.next = add nuw nsw i64 %iv.2, 1
  %exitcond.1.not = icmp eq i64 %iv.2.next, %N
  br i1 %exitcond.1.not, label %exit, label %loop.2

exit:
  ret void
}