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


@p = external local_unnamed_addr global [257 x i32], align 16
@q = external local_unnamed_addr global [257 x i32], align 16

; Test case for PR43398.

define void @can_sink_after_store(i32 %x, ptr %ptr, i64 %tc) local_unnamed_addr #0 {
; CHECK-LABEL: @can_sink_after_store(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[PREHEADER:%.*]]
; CHECK:       preheader:
; CHECK-NEXT:    [[IDX_PHI_TRANS:%.*]] = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 1
; CHECK-NEXT:    [[DOTPRE:%.*]] = load i32, ptr [[IDX_PHI_TRANS]], align 4
; CHECK-NEXT:    br label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i32> poison, i32 [[X:%.*]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i32> [[BROADCAST_SPLATINSERT]], <4 x i32> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[VECTOR_RECUR_INIT:%.*]] = insertelement <4 x i32> poison, i32 [[DOTPRE]], i32 3
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR:%.*]] = phi <4 x i32> [ [[VECTOR_RECUR_INIT]], [[VECTOR_PH]] ], [ [[WIDE_LOAD:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i64 1, [[INDEX]]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 [[OFFSET_IDX]]
; CHECK-NEXT:    [[WIDE_LOAD]] = load <4 x i32>, ptr [[TMP1]], align 4
; CHECK-NEXT:    [[TMP3:%.*]] = shufflevector <4 x i32> [[VECTOR_RECUR]], <4 x i32> [[WIDE_LOAD]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP4:%.*]] = add <4 x i32> [[TMP3]], [[BROADCAST_SPLAT]]
; CHECK-NEXT:    [[TMP5:%.*]] = add <4 x i32> [[TMP4]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds [257 x i32], ptr @q, i64 0, i64 [[OFFSET_IDX]]
; CHECK-NEXT:    store <4 x i32> [[TMP5]], ptr [[TMP6]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1996
; CHECK-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <4 x i32> [[WIDE_LOAD]], i32 3
; CHECK-NEXT:    br label [[SCALAR_PH:%.*]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    br label [[FOR:%.*]]
; CHECK:       for:
; CHECK-NEXT:    [[SCALAR_RECUR:%.*]] = phi i32 [ [[VECTOR_RECUR_EXTRACT]], [[SCALAR_PH]] ], [ [[PRE_NEXT:%.*]], [[FOR]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 1997, [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[FOR]] ]
; CHECK-NEXT:    [[ADD_1:%.*]] = add i32 [[SCALAR_RECUR]], [[X]]
; CHECK-NEXT:    [[IDX_1:%.*]] = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 [[IV]]
; CHECK-NEXT:    [[PRE_NEXT]] = load i32, ptr [[IDX_1]], align 4
; CHECK-NEXT:    [[ADD_2:%.*]] = add i32 [[ADD_1]], [[PRE_NEXT]]
; CHECK-NEXT:    [[IDX_2:%.*]] = getelementptr inbounds [257 x i32], ptr @q, i64 0, i64 [[IV]]
; CHECK-NEXT:    store i32 [[ADD_2]], ptr [[IDX_2]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[IV_NEXT]], 2000
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[EXIT:%.*]], label [[FOR]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;

entry:
  br label %preheader

preheader:
  %idx.phi.trans = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 1
  %.pre = load i32, ptr %idx.phi.trans, align 4
  br label %for

for:
  %pre.phi = phi i32 [ %.pre, %preheader ], [ %pre.next, %for ]
  %iv = phi i64 [ 1, %preheader ], [ %iv.next, %for ]
  %add.1 = add i32 %pre.phi, %x
  %idx.1 = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 %iv
  %pre.next = load i32, ptr %idx.1, align 4
  %add.2 = add i32 %add.1, %pre.next
  %idx.2 = getelementptr inbounds [257 x i32], ptr @q, i64 0, i64 %iv
  store i32 %add.2, ptr %idx.2, align 4
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond = icmp eq i64 %iv.next, 2000
  br i1 %exitcond, label %exit, label %for

exit:
  ret void
}

; We can sink potential trapping instructions, as this will only delay the trap
; and not introduce traps on additional paths.
define void @sink_sdiv(i32 %x, ptr %ptr, i64 %tc) local_unnamed_addr #0 {
; CHECK-LABEL: @sink_sdiv(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[PREHEADER:%.*]]
; CHECK:       preheader:
; CHECK-NEXT:    [[IDX_PHI_TRANS:%.*]] = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 1
; CHECK-NEXT:    [[DOTPRE:%.*]] = load i32, ptr [[IDX_PHI_TRANS]], align 4
; CHECK-NEXT:    br label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i32> poison, i32 [[X:%.*]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i32> [[BROADCAST_SPLATINSERT]], <4 x i32> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[VECTOR_RECUR_INIT:%.*]] = insertelement <4 x i32> poison, i32 [[DOTPRE]], i32 3
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR:%.*]] = phi <4 x i32> [ [[VECTOR_RECUR_INIT]], [[VECTOR_PH]] ], [ [[WIDE_LOAD:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i64 1, [[INDEX]]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 [[OFFSET_IDX]]
; CHECK-NEXT:    [[WIDE_LOAD]] = load <4 x i32>, ptr [[TMP1]], align 4
; CHECK-NEXT:    [[TMP3:%.*]] = shufflevector <4 x i32> [[VECTOR_RECUR]], <4 x i32> [[WIDE_LOAD]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP4:%.*]] = sdiv <4 x i32> [[TMP3]], [[BROADCAST_SPLAT]]
; CHECK-NEXT:    [[TMP5:%.*]] = add <4 x i32> [[TMP4]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds [257 x i32], ptr @q, i64 0, i64 [[OFFSET_IDX]]
; CHECK-NEXT:    store <4 x i32> [[TMP5]], ptr [[TMP6]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1996
; CHECK-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <4 x i32> [[WIDE_LOAD]], i32 3
; CHECK-NEXT:    br label [[SCALAR_PH:%.*]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    br label [[FOR:%.*]]
; CHECK:       for:
; CHECK-NEXT:    [[SCALAR_RECUR:%.*]] = phi i32 [ [[VECTOR_RECUR_EXTRACT]], [[SCALAR_PH]] ], [ [[PRE_NEXT:%.*]], [[FOR]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 1997, [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[FOR]] ]
; CHECK-NEXT:    [[DIV_1:%.*]] = sdiv i32 [[SCALAR_RECUR]], [[X]]
; CHECK-NEXT:    [[IDX_1:%.*]] = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 [[IV]]
; CHECK-NEXT:    [[PRE_NEXT]] = load i32, ptr [[IDX_1]], align 4
; CHECK-NEXT:    [[ADD_2:%.*]] = add i32 [[DIV_1]], [[PRE_NEXT]]
; CHECK-NEXT:    [[IDX_2:%.*]] = getelementptr inbounds [257 x i32], ptr @q, i64 0, i64 [[IV]]
; CHECK-NEXT:    store i32 [[ADD_2]], ptr [[IDX_2]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[IV_NEXT]], 2000
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[EXIT:%.*]], label [[FOR]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;

entry:
  br label %preheader

preheader:
  %idx.phi.trans = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 1
  %.pre = load i32, ptr %idx.phi.trans, align 4
  br label %for

for:
  %pre.phi = phi i32 [ %.pre, %preheader ], [ %pre.next, %for ]
  %iv = phi i64 [ 1, %preheader ], [ %iv.next, %for ]
  %div.1 = sdiv i32 %pre.phi, %x
  %idx.1 = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 %iv
  %pre.next = load i32, ptr %idx.1, align 4
  %add.2 = add i32 %div.1, %pre.next
  %idx.2 = getelementptr inbounds [257 x i32], ptr @q, i64 0, i64 %iv
  store i32 %add.2, ptr %idx.2, align 4
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond = icmp eq i64 %iv.next, 2000
  br i1 %exitcond, label %exit, label %for

exit:
  ret void
}

; Sink users of %pre.phi recursively.
define void @can_sink_with_additional_user(i32 %x, ptr %ptr, i64 %tc) {
; CHECK-LABEL: @can_sink_with_additional_user(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[PREHEADER:%.*]]
; CHECK:       preheader:
; CHECK-NEXT:    [[IDX_PHI_TRANS:%.*]] = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 1
; CHECK-NEXT:    [[DOTPRE:%.*]] = load i32, ptr [[IDX_PHI_TRANS]], align 4
; CHECK-NEXT:    br label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i32> poison, i32 [[X:%.*]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i32> [[BROADCAST_SPLATINSERT]], <4 x i32> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[VECTOR_RECUR_INIT:%.*]] = insertelement <4 x i32> poison, i32 [[DOTPRE]], i32 3
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR:%.*]] = phi <4 x i32> [ [[VECTOR_RECUR_INIT]], [[VECTOR_PH]] ], [ [[WIDE_LOAD:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i64 1, [[INDEX]]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 [[OFFSET_IDX]]
; CHECK-NEXT:    [[WIDE_LOAD]] = load <4 x i32>, ptr [[TMP1]], align 4
; CHECK-NEXT:    [[TMP3:%.*]] = shufflevector <4 x i32> [[VECTOR_RECUR]], <4 x i32> [[WIDE_LOAD]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP4:%.*]] = add <4 x i32> [[TMP3]], [[BROADCAST_SPLAT]]
; CHECK-NEXT:    [[TMP5:%.*]] = add <4 x i32> [[TMP4]], [[BROADCAST_SPLAT]]
; CHECK-NEXT:    [[TMP6:%.*]] = add <4 x i32> [[TMP4]], [[WIDE_LOAD]]
; CHECK-NEXT:    [[TMP7:%.*]] = add <4 x i32> [[TMP5]], [[TMP6]]
; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr inbounds [257 x i32], ptr @q, i64 0, i64 [[OFFSET_IDX]]
; CHECK-NEXT:    store <4 x i32> [[TMP7]], ptr [[TMP8]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP10:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1996
; CHECK-NEXT:    br i1 [[TMP10]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <4 x i32> [[WIDE_LOAD]], i32 3
; CHECK-NEXT:    br label [[SCALAR_PH:%.*]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    br label [[FOR:%.*]]
; CHECK:       for:
; CHECK-NEXT:    [[SCALAR_RECUR:%.*]] = phi i32 [ [[VECTOR_RECUR_EXTRACT]], [[SCALAR_PH]] ], [ [[PRE_NEXT:%.*]], [[FOR]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 1997, [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[FOR]] ]
; CHECK-NEXT:    [[ADD_1:%.*]] = add i32 [[SCALAR_RECUR]], [[X]]
; CHECK-NEXT:    [[ADD_2:%.*]] = add i32 [[ADD_1]], [[X]]
; CHECK-NEXT:    [[IDX_1:%.*]] = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 [[IV]]
; CHECK-NEXT:    [[PRE_NEXT]] = load i32, ptr [[IDX_1]], align 4
; CHECK-NEXT:    [[ADD_3:%.*]] = add i32 [[ADD_1]], [[PRE_NEXT]]
; CHECK-NEXT:    [[ADD_4:%.*]] = add i32 [[ADD_2]], [[ADD_3]]
; CHECK-NEXT:    [[IDX_2:%.*]] = getelementptr inbounds [257 x i32], ptr @q, i64 0, i64 [[IV]]
; CHECK-NEXT:    store i32 [[ADD_4]], ptr [[IDX_2]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[IV_NEXT]], 2000
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[EXIT:%.*]], label [[FOR]], !llvm.loop [[LOOP7:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;


entry:
  br label %preheader

preheader:
  %idx.phi.trans = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 1
  %.pre = load i32, ptr %idx.phi.trans, align 4
  br label %for

for:
  %pre.phi = phi i32 [ %.pre, %preheader ], [ %pre.next, %for ]
  %iv = phi i64 [ 1, %preheader ], [ %iv.next, %for ]
  %add.1 = add i32 %pre.phi, %x
  %add.2 = add i32 %add.1, %x
  %idx.1 = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 %iv
  %pre.next = load i32, ptr %idx.1, align 4
  %add.3 = add i32 %add.1, %pre.next
  %add.4 = add i32 %add.2, %add.3
  %idx.2 = getelementptr inbounds [257 x i32], ptr @q, i64 0, i64 %iv
  store i32 %add.4, ptr %idx.2, align 4
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond = icmp eq i64 %iv.next, 2000
  br i1 %exitcond, label %exit, label %for

exit:
  ret void
}

; FIXME: We can sink a store, if we can guarantee that it does not alias any
;        loads/stores in between.
define void @cannot_sink_store(i32 %x, ptr %ptr, i64 %tc) {
; CHECK-LABEL: @cannot_sink_store(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[PREHEADER:%.*]]
; CHECK:       preheader:
; CHECK-NEXT:    [[IDX_PHI_TRANS:%.*]] = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 1
; CHECK-NEXT:    [[DOTPRE:%.*]] = load i32, ptr [[IDX_PHI_TRANS]], align 4
; CHECK-NEXT:    br label [[FOR:%.*]]
; CHECK:       for:
; CHECK-NEXT:    [[PRE_PHI:%.*]] = phi i32 [ [[DOTPRE]], [[PREHEADER]] ], [ [[PRE_NEXT:%.*]], [[FOR]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 1, [[PREHEADER]] ], [ [[IV_NEXT:%.*]], [[FOR]] ]
; CHECK-NEXT:    [[ADD_1:%.*]] = add i32 [[PRE_PHI]], [[X:%.*]]
; CHECK-NEXT:    store i32 [[ADD_1]], ptr [[PTR:%.*]], align 4
; CHECK-NEXT:    [[IDX_1:%.*]] = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 [[IV]]
; CHECK-NEXT:    [[PRE_NEXT]] = load i32, ptr [[IDX_1]], align 4
; CHECK-NEXT:    [[ADD_2:%.*]] = add i32 [[ADD_1]], [[PRE_NEXT]]
; CHECK-NEXT:    [[IDX_2:%.*]] = getelementptr inbounds [257 x i32], ptr @q, i64 0, i64 [[IV]]
; CHECK-NEXT:    store i32 [[ADD_2]], ptr [[IDX_2]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[IV_NEXT]], 2000
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[EXIT:%.*]], label [[FOR]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;


entry:
  br label %preheader

preheader:
  %idx.phi.trans = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 1
  %.pre = load i32, ptr %idx.phi.trans, align 4
  br label %for

for:
  %pre.phi = phi i32 [ %.pre, %preheader ], [ %pre.next, %for ]
  %iv = phi i64 [ 1, %preheader ], [ %iv.next, %for ]
  %add.1 = add i32 %pre.phi, %x
  store i32 %add.1, ptr %ptr
  %idx.1 = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 %iv
  %pre.next = load i32, ptr %idx.1, align 4
  %add.2 = add i32 %add.1, %pre.next
  %idx.2 = getelementptr inbounds [257 x i32], ptr @q, i64 0, i64 %iv
  store i32 %add.2, ptr %idx.2, align 4
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond = icmp eq i64 %iv.next, 2000
  br i1 %exitcond, label %exit, label %for

exit:
  ret void
}

; Some kinds of reductions are not detected by IVDescriptors. If we have a
; cycle, we cannot sink it.
define void @cannot_sink_reduction(i32 %x, ptr %ptr, i64 %tc) {
; CHECK-LABEL: @cannot_sink_reduction(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[PREHEADER:%.*]]
; CHECK:       preheader:
; CHECK-NEXT:    [[IDX_PHI_TRANS:%.*]] = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 1
; CHECK-NEXT:    [[DOTPRE:%.*]] = load i32, ptr [[IDX_PHI_TRANS]], align 4
; CHECK-NEXT:    br label [[FOR:%.*]]
; CHECK:       for:
; CHECK-NEXT:    [[PRE_PHI:%.*]] = phi i32 [ [[DOTPRE]], [[PREHEADER]] ], [ [[D:%.*]], [[FOR]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 1, [[PREHEADER]] ], [ [[IV_NEXT:%.*]], [[FOR]] ]
; CHECK-NEXT:    [[D]] = sdiv i32 [[PRE_PHI]], [[X:%.*]]
; CHECK-NEXT:    [[IDX_1:%.*]] = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 [[IV]]
; CHECK-NEXT:    [[PRE_NEXT:%.*]] = load i32, ptr [[IDX_1]], align 4
; CHECK-NEXT:    [[ADD_2:%.*]] = add i32 [[X]], [[PRE_NEXT]]
; CHECK-NEXT:    [[IDX_2:%.*]] = getelementptr inbounds [257 x i32], ptr @q, i64 0, i64 [[IV]]
; CHECK-NEXT:    store i32 [[ADD_2]], ptr [[IDX_2]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[IV_NEXT]], 2000
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[EXIT:%.*]], label [[FOR]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %preheader

preheader:
  %idx.phi.trans = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 1
  %.pre = load i32, ptr %idx.phi.trans, align 4
  br label %for

for:
  %pre.phi = phi i32 [ %.pre, %preheader ], [ %d, %for ]
  %iv = phi i64 [ 1, %preheader ], [ %iv.next, %for ]
  %d = sdiv i32 %pre.phi, %x
  %idx.1 = getelementptr inbounds [257 x i32], ptr @p, i64 0, i64 %iv
  %pre.next = load i32, ptr %idx.1, align 4
  %add.2 = add i32 %x, %pre.next
  %idx.2 = getelementptr inbounds [257 x i32], ptr @q, i64 0, i64 %iv
  store i32 %add.2, ptr %idx.2, align 4
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond = icmp eq i64 %iv.next, 2000
  br i1 %exitcond, label %exit, label %for

exit:
  ret void
}

; Sink %tmp38 after %tmp60, then it enable the loop vectorization.
define void @instruction_with_2_FOR_operands(ptr noalias %A, ptr noalias %B, ptr noalias %C) {
; CHECK-LABEL: @instruction_with_2_FOR_operands(
; CHECK-NEXT:  bb:
; CHECK-NEXT:    br label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR:%.*]] = phi <4 x float> [ <float poison, float poison, float poison, float 0.000000e+00>, [[VECTOR_PH]] ], [ [[BROADCAST_SPLAT3:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR1:%.*]] = phi <4 x float> [ <float poison, float poison, float poison, float 1.000000e+00>, [[VECTOR_PH]] ], [ [[BROADCAST_SPLAT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds float, ptr [[C:%.*]], i64 [[INDEX]]
; CHECK-NEXT:    [[TMP2:%.*]] = load float, ptr [[A:%.*]], align 4
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x float> poison, float [[TMP2]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT]] = shufflevector <4 x float> [[BROADCAST_SPLATINSERT]], <4 x float> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP3:%.*]] = shufflevector <4 x float> [[VECTOR_RECUR1]], <4 x float> [[BROADCAST_SPLAT]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP4:%.*]] = load float, ptr [[B:%.*]], align 4
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT2:%.*]] = insertelement <4 x float> poison, float [[TMP4]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT3]] = shufflevector <4 x float> [[BROADCAST_SPLATINSERT2]], <4 x float> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP5:%.*]] = shufflevector <4 x float> [[VECTOR_RECUR]], <4 x float> [[BROADCAST_SPLAT3]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP6:%.*]] = fmul fast <4 x float> [[TMP5]], [[TMP3]]
; CHECK-NEXT:    store <4 x float> [[TMP6]], ptr [[TMP1]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1000
; CHECK-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    br label [[SCALAR_PH:%.*]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    br label [[BB13:%.*]]
; CHECK:       bb13:
; CHECK-NEXT:    [[SCALAR_RECUR:%.*]] = phi float [ [[TMP60:%.*]], [[BB13]] ], [ [[TMP4]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[SCALAR_RECUR5:%.*]] = phi float [ [[TMP49:%.*]], [[BB13]] ], [ [[TMP2]], [[SCALAR_PH]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[BB13]] ], [ 1000, [[SCALAR_PH]] ]
; CHECK-NEXT:    [[TMP38:%.*]] = fmul fast float [[SCALAR_RECUR]], [[SCALAR_RECUR5]]
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds float, ptr [[C]], i64 [[IV]]
; CHECK-NEXT:    [[TMP49]] = load float, ptr [[A]], align 4
; CHECK-NEXT:    [[TMP60]] = load float, ptr [[B]], align 4
; CHECK-NEXT:    store float [[TMP38]], ptr [[GEP]], align 4
; CHECK-NEXT:    [[TMP12:%.*]] = icmp slt i64 [[IV]], 1000
; CHECK-NEXT:    br i1 [[TMP12]], label [[BB13]], label [[BB74:%.*]], !llvm.loop [[LOOP9:![0-9]+]]
; CHECK:       bb74:
; CHECK-NEXT:    ret void
;
bb:
  br label %bb13

bb13:                                             ; preds = %bb13, %bb
  %tmp37 = phi float [ %tmp60, %bb13 ], [ 0.0, %bb ]
  %tmp27 = phi float [ %tmp49, %bb13 ], [ 1.0, %bb ]
  %iv = phi i64 [ %iv.next, %bb13 ], [ 0, %bb ]
  %tmp38 = fmul fast float %tmp37, %tmp27
  %iv.next = add nuw nsw i64 %iv, 1
  %gep = getelementptr inbounds float, ptr %C, i64 %iv
  %tmp49 = load float, ptr %A, align 4
  %tmp60 = load float, ptr %B, align 4
  store float %tmp38, ptr %gep
  %tmp12 = icmp slt i64 %iv, 1000
  br i1 %tmp12, label %bb13, label %bb74

bb74:                                             ; preds = %bb13
  ret void
}

define void @instruction_with_2_FOR_operands_and_multiple_other_uses(ptr noalias %dst.1, ptr noalias %dst.2, ptr noalias %dst.3, ptr noalias %for.ptr.1, ptr noalias %for.ptr.2) {
; CHECK-LABEL: @instruction_with_2_FOR_operands_and_multiple_other_uses(
; CHECK-NEXT:  bb:
; CHECK-NEXT:    br label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR:%.*]] = phi <4 x float> [ <float poison, float poison, float poison, float 0.000000e+00>, [[VECTOR_PH]] ], [ [[BROADCAST_SPLAT3:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR1:%.*]] = phi <4 x float> [ <float poison, float poison, float poison, float 0.000000e+00>, [[VECTOR_PH]] ], [ [[BROADCAST_SPLAT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = load float, ptr [[FOR_PTR_2:%.*]], align 4
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x float> poison, float [[TMP1]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT]] = shufflevector <4 x float> [[BROADCAST_SPLATINSERT]], <4 x float> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x float> [[VECTOR_RECUR1]], <4 x float> [[BROADCAST_SPLAT]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP3:%.*]] = load float, ptr [[FOR_PTR_1:%.*]], align 4
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT2:%.*]] = insertelement <4 x float> poison, float [[TMP3]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT3]] = shufflevector <4 x float> [[BROADCAST_SPLATINSERT2]], <4 x float> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP4:%.*]] = shufflevector <4 x float> [[VECTOR_RECUR]], <4 x float> [[BROADCAST_SPLAT3]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP5:%.*]] = fmul fast <4 x float> [[TMP4]], splat (float 2.000000e+00)
; CHECK-NEXT:    [[TMP6:%.*]] = fmul fast <4 x float> [[TMP4]], [[TMP2]]
; CHECK-NEXT:    [[TMP7:%.*]] = fadd fast <4 x float> [[TMP4]], splat (float 1.000000e+00)
; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr inbounds float, ptr [[DST_1:%.*]], i64 [[INDEX]]
; CHECK-NEXT:    store <4 x float> [[TMP6]], ptr [[TMP8]], align 4
; CHECK-NEXT:    [[TMP10:%.*]] = getelementptr inbounds float, ptr [[DST_2:%.*]], i64 [[INDEX]]
; CHECK-NEXT:    store <4 x float> [[TMP5]], ptr [[TMP10]], align 4
; CHECK-NEXT:    [[TMP12:%.*]] = getelementptr inbounds float, ptr [[DST_3:%.*]], i64 [[INDEX]]
; CHECK-NEXT:    store <4 x float> [[TMP7]], ptr [[TMP12]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP14:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1000
; CHECK-NEXT:    br i1 [[TMP14]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP10:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    br label [[SCALAR_PH:%.*]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[SCALAR_RECUR:%.*]] = phi float [ [[TMP3]], [[SCALAR_PH]] ], [ [[FOR_1_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[SCALAR_RECUR5:%.*]] = phi float [ [[TMP1]], [[SCALAR_PH]] ], [ [[FOR_2_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 1000, [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[FOR_1_USE_1:%.*]] = fmul fast float [[SCALAR_RECUR]], 2.000000e+00
; CHECK-NEXT:    [[USED_BY_BOTH:%.*]] = fmul fast float [[SCALAR_RECUR]], [[SCALAR_RECUR5]]
; CHECK-NEXT:    [[FOR_2_NEXT]] = load float, ptr [[FOR_PTR_2]], align 4
; CHECK-NEXT:    [[FOR_1_USE_3:%.*]] = fadd fast float [[SCALAR_RECUR]], 1.000000e+00
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[FOR_1_NEXT]] = load float, ptr [[FOR_PTR_1]], align 4
; CHECK-NEXT:    [[GEP_DST_1:%.*]] = getelementptr inbounds float, ptr [[DST_1]], i64 [[IV]]
; CHECK-NEXT:    store float [[USED_BY_BOTH]], ptr [[GEP_DST_1]], align 4
; CHECK-NEXT:    [[GEP_DST_2:%.*]] = getelementptr inbounds float, ptr [[DST_2]], i64 [[IV]]
; CHECK-NEXT:    store float [[FOR_1_USE_1]], ptr [[GEP_DST_2]], align 4
; CHECK-NEXT:    [[GEP_DST_3:%.*]] = getelementptr inbounds float, ptr [[DST_3]], i64 [[IV]]
; CHECK-NEXT:    store float [[FOR_1_USE_3]], ptr [[GEP_DST_3]], align 4
; CHECK-NEXT:    [[EC:%.*]] = icmp slt i64 [[IV]], 1000
; CHECK-NEXT:    br i1 [[EC]], label [[LOOP]], label [[EXIT:%.*]], !llvm.loop [[LOOP11:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
bb:
  br label %loop

loop:
  %for.1 = phi float [ 0.0, %bb ], [ %for.1.next, %loop]
  %for.2 = phi float [ 0.0, %bb ], [ %for.2.next, %loop]
  %iv = phi i64 [ 0, %bb ], [ %iv.next, %loop ]
  %for.1.use.1  = fmul fast float %for.1, 2.0
  %used.by.both = fmul fast float %for.1, %for.2
  %for.2.next = load float, ptr %for.ptr.2, align 4
  %for.1.use.3 = fadd fast float %for.1, 1.0
  %iv.next = add nuw nsw i64 %iv, 1
  %for.1.next = load float, ptr %for.ptr.1, align 4
  %gep.dst.1 = getelementptr inbounds float, ptr %dst.1, i64 %iv
  store float %used.by.both, ptr %gep.dst.1
  %gep.dst.2 = getelementptr inbounds float, ptr %dst.2, i64 %iv
  store float %for.1.use.1, ptr %gep.dst.2
  %gep.dst.3 = getelementptr inbounds float, ptr %dst.3, i64 %iv
  store float %for.1.use.3, ptr %gep.dst.3
  %ec = icmp slt i64 %iv, 1000
  br i1 %ec, label %loop, label %exit

exit:
  ret void
}

; Variation of @instruction_with_2_FOR_operands_and_multiple_other_uses, with
; multiple instructions in a chain from for.1 to %used.by.both.
define void @instruction_with_2_FOR_operands_and_multiple_other_uses_chain(ptr noalias %dst.1, ptr noalias %dst.2, ptr noalias %dst.3, ptr noalias %for.ptr.1, ptr noalias %for.ptr.2) {
; CHECK-LABEL: @instruction_with_2_FOR_operands_and_multiple_other_uses_chain(
; CHECK-NEXT:  bb:
; CHECK-NEXT:    br label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR:%.*]] = phi <4 x float> [ <float poison, float poison, float poison, float 0.000000e+00>, [[VECTOR_PH]] ], [ [[BROADCAST_SPLAT3:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR1:%.*]] = phi <4 x float> [ <float poison, float poison, float poison, float 0.000000e+00>, [[VECTOR_PH]] ], [ [[BROADCAST_SPLAT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = load float, ptr [[FOR_PTR_2:%.*]], align 4
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x float> poison, float [[TMP1]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT]] = shufflevector <4 x float> [[BROADCAST_SPLATINSERT]], <4 x float> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x float> [[VECTOR_RECUR1]], <4 x float> [[BROADCAST_SPLAT]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP3:%.*]] = load float, ptr [[FOR_PTR_1:%.*]], align 4
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT2:%.*]] = insertelement <4 x float> poison, float [[TMP3]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT3]] = shufflevector <4 x float> [[BROADCAST_SPLATINSERT2]], <4 x float> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP4:%.*]] = shufflevector <4 x float> [[VECTOR_RECUR]], <4 x float> [[BROADCAST_SPLAT3]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP5:%.*]] = fmul fast <4 x float> [[TMP4]], splat (float 2.000000e+00)
; CHECK-NEXT:    [[TMP6:%.*]] = fmul fast <4 x float> [[TMP5]], splat (float 2.000000e+00)
; CHECK-NEXT:    [[TMP7:%.*]] = fmul fast <4 x float> [[TMP6]], [[TMP2]]
; CHECK-NEXT:    [[TMP8:%.*]] = fadd fast <4 x float> [[TMP4]], splat (float 1.000000e+00)
; CHECK-NEXT:    [[TMP9:%.*]] = getelementptr inbounds float, ptr [[DST_1:%.*]], i64 [[INDEX]]
; CHECK-NEXT:    store <4 x float> [[TMP7]], ptr [[TMP9]], align 4
; CHECK-NEXT:    [[TMP11:%.*]] = getelementptr inbounds float, ptr [[DST_2:%.*]], i64 [[INDEX]]
; CHECK-NEXT:    store <4 x float> [[TMP5]], ptr [[TMP11]], align 4
; CHECK-NEXT:    [[TMP13:%.*]] = getelementptr inbounds float, ptr [[DST_3:%.*]], i64 [[INDEX]]
; CHECK-NEXT:    store <4 x float> [[TMP8]], ptr [[TMP13]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP15:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1000
; CHECK-NEXT:    br i1 [[TMP15]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP12:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    br label [[SCALAR_PH:%.*]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[SCALAR_RECUR:%.*]] = phi float [ [[TMP3]], [[SCALAR_PH]] ], [ [[FOR_1_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[SCALAR_RECUR5:%.*]] = phi float [ [[TMP1]], [[SCALAR_PH]] ], [ [[FOR_2_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 1000, [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[FOR_1_USE_1:%.*]] = fmul fast float [[SCALAR_RECUR]], 2.000000e+00
; CHECK-NEXT:    [[FOR_1_USE_C:%.*]] = fmul fast float [[FOR_1_USE_1]], 2.000000e+00
; CHECK-NEXT:    [[USED_BY_BOTH:%.*]] = fmul fast float [[FOR_1_USE_C]], [[SCALAR_RECUR5]]
; CHECK-NEXT:    [[FOR_2_NEXT]] = load float, ptr [[FOR_PTR_2]], align 4
; CHECK-NEXT:    [[FOR_1_USE_3:%.*]] = fadd fast float [[SCALAR_RECUR]], 1.000000e+00
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[FOR_1_NEXT]] = load float, ptr [[FOR_PTR_1]], align 4
; CHECK-NEXT:    [[GEP_DST_1:%.*]] = getelementptr inbounds float, ptr [[DST_1]], i64 [[IV]]
; CHECK-NEXT:    store float [[USED_BY_BOTH]], ptr [[GEP_DST_1]], align 4
; CHECK-NEXT:    [[GEP_DST_2:%.*]] = getelementptr inbounds float, ptr [[DST_2]], i64 [[IV]]
; CHECK-NEXT:    store float [[FOR_1_USE_1]], ptr [[GEP_DST_2]], align 4
; CHECK-NEXT:    [[GEP_DST_3:%.*]] = getelementptr inbounds float, ptr [[DST_3]], i64 [[IV]]
; CHECK-NEXT:    store float [[FOR_1_USE_3]], ptr [[GEP_DST_3]], align 4
; CHECK-NEXT:    [[EC:%.*]] = icmp slt i64 [[IV]], 1000
; CHECK-NEXT:    br i1 [[EC]], label [[LOOP]], label [[EXIT:%.*]], !llvm.loop [[LOOP13:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
bb:
  br label %loop

loop:
  %for.1 = phi float [ 0.0, %bb ], [ %for.1.next, %loop]
  %for.2 = phi float [ 0.0, %bb ], [ %for.2.next, %loop]
  %iv = phi i64 [ 0, %bb ], [ %iv.next, %loop ]
  %for.1.use.1  = fmul fast float %for.1, 2.0
  %for.1.use.c  = fmul fast float %for.1.use.1, 2.0
  %used.by.both = fmul fast float %for.1.use.c, %for.2
  %for.2.next = load float, ptr %for.ptr.2, align 4
  %for.1.use.3 = fadd fast float %for.1, 1.0
  %iv.next = add nuw nsw i64 %iv, 1
  %for.1.next = load float, ptr %for.ptr.1, align 4
  %gep.dst.1 = getelementptr inbounds float, ptr %dst.1, i64 %iv
  store float %used.by.both, ptr %gep.dst.1
  %gep.dst.2 = getelementptr inbounds float, ptr %dst.2, i64 %iv
  store float %for.1.use.1, ptr %gep.dst.2
  %gep.dst.3 = getelementptr inbounds float, ptr %dst.3, i64 %iv
  store float %for.1.use.3, ptr %gep.dst.3
  %ec = icmp slt i64 %iv, 1000
  br i1 %ec, label %loop, label %exit

exit:
  ret void
}

; The (first) reason `%first_time.1` cannot be sunk is because it appears outside
; the header and is not dominated by Previous. The fact that it feeds Previous
; is a second sinking-preventing reason.
define void @cannot_sink_phi(ptr %ptr) {
; CHECK-LABEL: @cannot_sink_phi(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
; CHECK:       loop.header:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 1, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT:    [[FOR:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[FOR_NEXT:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT:    [[C_1:%.*]] = icmp ult i64 [[IV]], 500
; CHECK-NEXT:    br i1 [[C_1]], label [[IF_TRUEBB:%.*]], label [[IF_FALSEBB:%.*]]
; CHECK:       if.truebb:
; CHECK-NEXT:    br label [[LOOP_LATCH]]
; CHECK:       if.falsebb:
; CHECK-NEXT:    br label [[LOOP_LATCH]]
; CHECK:       loop.latch:
; CHECK-NEXT:    [[FIRST_TIME_1:%.*]] = phi i32 [ 20, [[IF_TRUEBB]] ], [ [[FOR]], [[IF_FALSEBB]] ]
; CHECK-NEXT:    [[C_2:%.*]] = icmp ult i64 [[IV]], 800
; CHECK-NEXT:    [[FOR_NEXT]] = select i1 [[C_2]], i32 30, i32 [[FIRST_TIME_1]]
; CHECK-NEXT:    [[PTR_IDX:%.*]] = getelementptr i32, ptr [[PTR:%.*]], i64 [[IV]]
; CHECK-NEXT:    store i32 [[FOR_NEXT]], ptr [[PTR_IDX]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], 1000
; CHECK-NEXT:    br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP_HEADER]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop.header

loop.header:
  %iv = phi i64 [ 1, %entry ], [ %iv.next, %loop.latch ]
  %for = phi i32 [ 0, %entry ], [ %for.next, %loop.latch ]
  %c.1 = icmp ult i64 %iv, 500
  br i1 %c.1, label %if.truebb, label %if.falsebb

if.truebb:
  br label %loop.latch

if.falsebb:
  br label %loop.latch

loop.latch:
  %first_time.1 = phi i32 [ 20, %if.truebb ], [ %for, %if.falsebb ]
  %c.2 = icmp ult i64 %iv, 800
  %for.next = select i1 %c.2, i32 30, i32 %first_time.1
  %ptr.idx = getelementptr i32, ptr %ptr, i64 %iv
  store i32 %for.next, ptr %ptr.idx
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond.not = icmp eq i64 %iv.next, 1000
  br i1 %exitcond.not, label %exit, label %loop.header

exit:
  ret void
}

; A recurrence in a multiple exit loop.
define i16 @multiple_exit(ptr %p, i32 %n) {
; CHECK-LABEL: @multiple_exit(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0)
; CHECK-NEXT:    [[UMIN:%.*]] = call i32 @llvm.umin.i32(i32 [[SMAX]], i32 2096)
; CHECK-NEXT:    [[TMP0:%.*]] = add nuw nsw i32 [[UMIN]], 1
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 4
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0
; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], i32 4, i32 [[N_MOD_VF]]
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]]
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR:%.*]] = phi <4 x i16> [ <i16 poison, i16 poison, i16 poison, i16 0>, [[VECTOR_PH]] ], [ [[WIDE_LOAD:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP4:%.*]] = sext i32 [[INDEX]] to i64
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[TMP4]]
; CHECK-NEXT:    [[WIDE_LOAD]] = load <4 x i16>, ptr [[TMP5]], align 2
; CHECK-NEXT:    [[TMP7:%.*]] = shufflevector <4 x i16> [[VECTOR_RECUR]], <4 x i16> [[WIDE_LOAD]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    store <4 x i16> [[TMP7]], ptr [[TMP5]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP14:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <4 x i16> [[WIDE_LOAD]], i32 3
; CHECK-NEXT:    br label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[SCALAR_RECUR_INIT:%.*]] = phi i16 [ [[VECTOR_RECUR_EXTRACT]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY]] ]
; CHECK-NEXT:    br label [[FOR_COND:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; CHECK-NEXT:    [[SCALAR_RECUR:%.*]] = phi i16 [ [[SCALAR_RECUR_INIT]], [[SCALAR_PH]] ], [ [[REC_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[IPROM:%.*]] = sext i32 [[I]] to i64
; CHECK-NEXT:    [[B:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 [[IPROM]]
; CHECK-NEXT:    [[REC_NEXT]] = load i16, ptr [[B]], align 2
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[I]], [[N]]
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    store i16 [[SCALAR_RECUR]], ptr [[B]], align 4
; CHECK-NEXT:    [[INC]] = add nsw i32 [[I]], 1
; CHECK-NEXT:    [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
; CHECK-NEXT:    br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END]], !llvm.loop [[LOOP15:![0-9]+]]
; CHECK:       if.end:
; CHECK-NEXT:    [[REC_LCSSA:%.*]] = phi i16 [ [[SCALAR_RECUR]], [[FOR_BODY]] ], [ [[SCALAR_RECUR]], [[FOR_COND]] ]
; CHECK-NEXT:    ret i16 [[REC_LCSSA]]
;
entry:
  br label %for.cond

for.cond:
  %i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
  %rec = phi i16 [0, %entry], [ %rec.next, %for.body ]
  %iprom = sext i32 %i to i64
  %b = getelementptr inbounds i16, ptr %p, i64 %iprom
  %rec.next = load i16, ptr %b
  %cmp = icmp slt i32 %i, %n
  br i1 %cmp, label %for.body, label %if.end

for.body:
  store i16 %rec , ptr %b, align 4
  %inc = add nsw i32 %i, 1
  %cmp2 = icmp slt i32 %i, 2096
  br i1 %cmp2, label %for.cond, label %if.end

if.end:
  ret i16 %rec
}


; A multiple exit case where one of the exiting edges involves a value
; from the recurrence and one does not.
define i16 @multiple_exit2(ptr %p, i32 %n) {
; CHECK-LABEL: @multiple_exit2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0)
; CHECK-NEXT:    [[UMIN:%.*]] = call i32 @llvm.umin.i32(i32 [[SMAX]], i32 2096)
; CHECK-NEXT:    [[TMP0:%.*]] = add nuw nsw i32 [[UMIN]], 1
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 4
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0
; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], i32 4, i32 [[N_MOD_VF]]
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]]
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR:%.*]] = phi <4 x i16> [ <i16 poison, i16 poison, i16 poison, i16 0>, [[VECTOR_PH]] ], [ [[WIDE_LOAD:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP4:%.*]] = sext i32 [[INDEX]] to i64
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i16, ptr [[P:%.*]], i64 [[TMP4]]
; CHECK-NEXT:    [[WIDE_LOAD]] = load <4 x i16>, ptr [[TMP5]], align 2
; CHECK-NEXT:    [[TMP7:%.*]] = shufflevector <4 x i16> [[VECTOR_RECUR]], <4 x i16> [[WIDE_LOAD]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    store <4 x i16> [[TMP7]], ptr [[TMP5]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP8]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP16:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <4 x i16> [[WIDE_LOAD]], i32 3
; CHECK-NEXT:    br label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[SCALAR_RECUR_INIT:%.*]] = phi i16 [ [[VECTOR_RECUR_EXTRACT]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY]] ]
; CHECK-NEXT:    br label [[FOR_COND:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; CHECK-NEXT:    [[SCALAR_RECUR:%.*]] = phi i16 [ [[SCALAR_RECUR_INIT]], [[SCALAR_PH]] ], [ [[REC_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[IPROM:%.*]] = sext i32 [[I]] to i64
; CHECK-NEXT:    [[B:%.*]] = getelementptr inbounds i16, ptr [[P]], i64 [[IPROM]]
; CHECK-NEXT:    [[REC_NEXT]] = load i16, ptr [[B]], align 2
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[I]], [[N]]
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    store i16 [[SCALAR_RECUR]], ptr [[B]], align 4
; CHECK-NEXT:    [[INC]] = add nsw i32 [[I]], 1
; CHECK-NEXT:    [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
; CHECK-NEXT:    br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END]], !llvm.loop [[LOOP17:![0-9]+]]
; CHECK:       if.end:
; CHECK-NEXT:    [[REC_LCSSA:%.*]] = phi i16 [ [[SCALAR_RECUR]], [[FOR_COND]] ], [ 10, [[FOR_BODY]] ]
; CHECK-NEXT:    ret i16 [[REC_LCSSA]]
;
entry:
  br label %for.cond

for.cond:
  %i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
  %rec = phi i16 [0, %entry], [ %rec.next, %for.body ]
  %iprom = sext i32 %i to i64
  %b = getelementptr inbounds i16, ptr %p, i64 %iprom
  %rec.next = load i16, ptr %b
  %cmp = icmp slt i32 %i, %n
  br i1 %cmp, label %for.body, label %if.end

for.body:
  store i16 %rec , ptr %b, align 4
  %inc = add nsw i32 %i, 1
  %cmp2 = icmp slt i32 %i, 2096
  br i1 %cmp2, label %for.cond, label %if.end

if.end:
  %rec.lcssa = phi i16 [ %rec, %for.cond ], [ 10, %for.body ]
  ret i16 %rec.lcssa
}

; A test where the instructions to sink may not be visited in dominance order.
define void @sink_dominance(ptr %ptr, i32 %N) {
; CHECK-LABEL: @sink_dominance(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[UMAX1:%.*]] = call i32 @llvm.umax.i32(i32 [[N:%.*]], i32 1)
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[UMAX1]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_SCEVCHECK:%.*]]
; CHECK:       vector.scevcheck:
; CHECK-NEXT:    [[UMAX:%.*]] = call i32 @llvm.umax.i32(i32 [[N]], i32 1)
; CHECK-NEXT:    [[TMP0:%.*]] = add i32 [[UMAX]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = icmp slt i32 [[TMP0]], 0
; CHECK-NEXT:    br i1 [[TMP1]], label [[SCALAR_PH]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i32 [[UMAX1]], 4
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i32 [[UMAX1]], [[N_MOD_VF]]
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR:%.*]] = phi <4 x i64> [ <i64 poison, i64 poison, i64 poison, i64 0>, [[VECTOR_PH]] ], [ [[TMP5:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds i32, ptr [[PTR:%.*]], i32 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i32>, ptr [[TMP3]], align 4
; CHECK-NEXT:    [[TMP5]] = zext <4 x i32> [[WIDE_LOAD]] to <4 x i64>
; CHECK-NEXT:    [[TMP6:%.*]] = shufflevector <4 x i64> [[VECTOR_RECUR]], <4 x i64> [[TMP5]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP7:%.*]] = trunc <4 x i64> [[TMP6]] to <4 x i32>
; CHECK-NEXT:    [[TMP8:%.*]] = icmp slt <4 x i32> [[TMP7]], splat (i32 213)
; CHECK-NEXT:    [[TMP9:%.*]] = select <4 x i1> [[TMP8]], <4 x i32> [[TMP7]], <4 x i32> splat (i32 22)
; CHECK-NEXT:    store <4 x i32> [[TMP9]], ptr [[TMP3]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT:    [[TMP10:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP10]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP18:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <4 x i64> [[TMP5]], i32 3
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i32 [[UMAX1]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[SCALAR_RECUR_INIT:%.*]] = phi i64 [ [[VECTOR_RECUR_EXTRACT]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ], [ 0, [[VECTOR_SCEVCHECK]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY]] ], [ 0, [[VECTOR_SCEVCHECK]] ]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[SCALAR_RECUR:%.*]] = phi i64 [ [[SCALAR_RECUR_INIT]], [[SCALAR_PH]] ], [ [[FOR_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[FOR_TRUNC:%.*]] = trunc i64 [[SCALAR_RECUR]] to i32
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[FOR_TRUNC]], 213
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[CMP]], i32 [[FOR_TRUNC]], i32 22
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds i32, ptr [[PTR]], i32 [[IV]]
; CHECK-NEXT:    [[LV:%.*]] = load i32, ptr [[GEP]], align 4
; CHECK-NEXT:    [[FOR_NEXT]] = zext i32 [[LV]] to i64
; CHECK-NEXT:    store i32 [[SELECT]], ptr [[GEP]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], 1
; CHECK-NEXT:    [[CMP73:%.*]] = icmp ugt i32 [[N]], [[IV_NEXT]]
; CHECK-NEXT:    br i1 [[CMP73]], label [[LOOP]], label [[EXIT]], !llvm.loop [[LOOP19:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %for = phi i64 [ 0, %entry ], [ %for.next, %loop ]
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]

  %for.trunc = trunc i64 %for to i32
  %cmp = icmp slt i32 %for.trunc, 213
  %select = select i1 %cmp, i32 %for.trunc, i32 22

  %gep = getelementptr inbounds i32, ptr %ptr, i32 %iv
  %lv = load i32, ptr %gep, align 4
  %for.next = zext i32 %lv to i64
  store i32 %select, ptr %gep

  %iv.next = add i32 %iv, 1
  %cmp73 = icmp ugt i32 %N, %iv.next
  br i1 %cmp73, label %loop, label %exit

exit:
  ret void
}

; Similar to @sink_dominance, but with 2 separate chains that merge at %select
; with a different number of instructions in between.
define void @sink_dominance_2(ptr %ptr, i32 %N) {
; CHECK-LABEL: @sink_dominance_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[UMAX1:%.*]] = call i32 @llvm.umax.i32(i32 [[N:%.*]], i32 1)
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[UMAX1]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_SCEVCHECK:%.*]]
; CHECK:       vector.scevcheck:
; CHECK-NEXT:    [[UMAX:%.*]] = call i32 @llvm.umax.i32(i32 [[N]], i32 1)
; CHECK-NEXT:    [[TMP0:%.*]] = add i32 [[UMAX]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = icmp slt i32 [[TMP0]], 0
; CHECK-NEXT:    br i1 [[TMP1]], label [[SCALAR_PH]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i32 [[UMAX1]], 4
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i32 [[UMAX1]], [[N_MOD_VF]]
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR:%.*]] = phi <4 x i64> [ <i64 poison, i64 poison, i64 poison, i64 0>, [[VECTOR_PH]] ], [ [[TMP5:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds i32, ptr [[PTR:%.*]], i32 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x i32>, ptr [[TMP3]], align 4
; CHECK-NEXT:    [[TMP5]] = zext <4 x i32> [[WIDE_LOAD]] to <4 x i64>
; CHECK-NEXT:    [[TMP6:%.*]] = shufflevector <4 x i64> [[VECTOR_RECUR]], <4 x i64> [[TMP5]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP7:%.*]] = trunc <4 x i64> [[TMP6]] to <4 x i32>
; CHECK-NEXT:    [[TMP8:%.*]] = add <4 x i32> [[TMP7]], splat (i32 2)
; CHECK-NEXT:    [[TMP9:%.*]] = mul <4 x i32> [[TMP8]], splat (i32 99)
; CHECK-NEXT:    [[TMP10:%.*]] = icmp slt <4 x i32> [[TMP7]], splat (i32 213)
; CHECK-NEXT:    [[TMP11:%.*]] = select <4 x i1> [[TMP10]], <4 x i32> [[TMP7]], <4 x i32> [[TMP9]]
; CHECK-NEXT:    store <4 x i32> [[TMP11]], ptr [[TMP3]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT:    [[TMP12:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP12]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP20:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <4 x i64> [[TMP5]], i32 3
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i32 [[UMAX1]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT:%.*]], label [[SCALAR_PH]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    [[SCALAR_RECUR_INIT:%.*]] = phi i64 [ [[VECTOR_RECUR_EXTRACT]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ], [ 0, [[VECTOR_SCEVCHECK]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY]] ], [ 0, [[VECTOR_SCEVCHECK]] ]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[SCALAR_RECUR:%.*]] = phi i64 [ [[SCALAR_RECUR_INIT]], [[SCALAR_PH]] ], [ [[FOR_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[FOR_TRUNC:%.*]] = trunc i64 [[SCALAR_RECUR]] to i32
; CHECK-NEXT:    [[STEP:%.*]] = add i32 [[FOR_TRUNC]], 2
; CHECK-NEXT:    [[STEP_2:%.*]] = mul i32 [[STEP]], 99
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[FOR_TRUNC]], 213
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[CMP]], i32 [[FOR_TRUNC]], i32 [[STEP_2]]
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds i32, ptr [[PTR]], i32 [[IV]]
; CHECK-NEXT:    [[LV:%.*]] = load i32, ptr [[GEP]], align 4
; CHECK-NEXT:    [[FOR_NEXT]] = zext i32 [[LV]] to i64
; CHECK-NEXT:    store i32 [[SELECT]], ptr [[GEP]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], 1
; CHECK-NEXT:    [[CMP73:%.*]] = icmp ugt i32 [[N]], [[IV_NEXT]]
; CHECK-NEXT:    br i1 [[CMP73]], label [[LOOP]], label [[EXIT]], !llvm.loop [[LOOP21:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %for = phi i64 [ 0, %entry ], [ %for.next, %loop ]
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]

  %for.trunc = trunc i64 %for to i32
  %step = add i32 %for.trunc, 2
  %step.2 = mul i32 %step, 99

  %cmp = icmp slt i32 %for.trunc, 213
  %select = select i1 %cmp, i32 %for.trunc, i32 %step.2

  %gep = getelementptr inbounds i32, ptr %ptr, i32 %iv
  %lv = load i32, ptr %gep, align 4
  %for.next = zext i32 %lv to i64
  store i32 %select, ptr %gep

  %iv.next = add i32 %iv, 1
  %cmp73 = icmp ugt i32 %N, %iv.next
  br i1 %cmp73, label %loop, label %exit

exit:
  ret void
}

define void @cannot_sink_load_past_store(ptr %ptr, i32 %N) {
; CHECK-LABEL: @cannot_sink_load_past_store(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[FOR:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[FOR_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[GEP_FOR:%.*]] = getelementptr inbounds i32, ptr [[PTR:%.*]], i64 [[FOR]]
; CHECK-NEXT:    [[LV_FOR:%.*]] = load i32, ptr [[GEP_FOR]], align 4
; CHECK-NEXT:    [[FOR_TRUNC:%.*]] = trunc i64 [[FOR]] to i32
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[LV_FOR]], [[FOR_TRUNC]]
; CHECK-NEXT:    [[SELECT:%.*]] = select i1 [[CMP]], i32 [[LV_FOR]], i32 22
; CHECK-NEXT:    [[GEP_IV:%.*]] = getelementptr inbounds i32, ptr [[PTR]], i32 [[IV]]
; CHECK-NEXT:    store i32 0, ptr [[GEP_IV]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], 1
; CHECK-NEXT:    [[FOR_NEXT]] = zext i32 [[IV]] to i64
; CHECK-NEXT:    [[CMP73:%.*]] = icmp ugt i32 [[N:%.*]], [[IV_NEXT]]
; CHECK-NEXT:    br i1 [[CMP73]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %for = phi i64 [ 0, %entry ], [ %for.next, %loop ]
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]

  %gep.for = getelementptr inbounds i32, ptr %ptr, i64 %for
  %lv.for = load i32, ptr %gep.for, align 4
  %for.trunc = trunc i64 %for to i32
  %cmp = icmp slt i32 %lv.for, %for.trunc
  %select = select i1 %cmp, i32 %lv.for, i32 22

  %gep.iv = getelementptr inbounds i32, ptr %ptr, i32 %iv
  store i32 0, ptr %gep.iv
  %iv.next = add i32 %iv, 1
  %for.next = zext i32 %iv to i64

  %cmp73 = icmp ugt i32 %N, %iv.next
  br i1 %cmp73, label %loop, label %exit

exit:
  ret void
}

define void @test_for_sink_instruction_after_same_incoming_1(ptr %ptr) {
; CHECK-LABEL: @test_for_sink_instruction_after_same_incoming_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR:%.*]] = phi <4 x double> [ <double poison, double poison, double poison, double 1.000000e+01>, [[VECTOR_PH]] ], [ [[WIDE_LOAD:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR1:%.*]] = phi <4 x double> [ <double poison, double poison, double poison, double 2.000000e+01>, [[VECTOR_PH]] ], [ [[WIDE_LOAD]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i64 1, [[INDEX]]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds double, ptr [[PTR:%.*]], i64 [[OFFSET_IDX]]
; CHECK-NEXT:    [[WIDE_LOAD]] = load <4 x double>, ptr [[TMP1]], align 8
; CHECK-NEXT:    [[TMP3:%.*]] = shufflevector <4 x double> [[VECTOR_RECUR1]], <4 x double> [[WIDE_LOAD]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP4:%.*]] = fadd <4 x double> splat (double 1.000000e+01), [[TMP3]]
; CHECK-NEXT:    [[TMP5:%.*]] = shufflevector <4 x double> [[VECTOR_RECUR]], <4 x double> [[WIDE_LOAD]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP6:%.*]] = fadd <4 x double> [[TMP4]], [[TMP5]]
; CHECK-NEXT:    store <4 x double> [[TMP6]], ptr [[TMP1]], align 8
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i64 [[INDEX_NEXT]], 996
; CHECK-NEXT:    br i1 [[TMP7]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP22:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[VECTOR_RECUR_EXTRACT2:%.*]] = extractelement <4 x double> [[WIDE_LOAD]], i32 3
; CHECK-NEXT:    br label [[SCALAR_PH:%.*]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[SCALAR_RECUR:%.*]] = phi double [ [[VECTOR_RECUR_EXTRACT2]], [[SCALAR_PH]] ], [ [[FOR_1_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[SCALAR_RECUR4:%.*]] = phi double [ [[VECTOR_RECUR_EXTRACT2]], [[SCALAR_PH]] ], [ [[FOR_1_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 997, [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[ADD_1:%.*]] = fadd double 1.000000e+01, [[SCALAR_RECUR4]]
; CHECK-NEXT:    [[ADD_2:%.*]] = fadd double [[ADD_1]], [[SCALAR_RECUR]]
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[GEP_PTR:%.*]] = getelementptr inbounds double, ptr [[PTR]], i64 [[IV]]
; CHECK-NEXT:    [[FOR_1_NEXT]] = load double, ptr [[GEP_PTR]], align 8
; CHECK-NEXT:    store double [[ADD_2]], ptr [[GEP_PTR]], align 8
; CHECK-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], 1000
; CHECK-NEXT:    br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP]], !llvm.loop [[LOOP23:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %for.1 = phi double [ 10.0, %entry ], [ %for.1.next, %loop ]
  %for.2 = phi double [ 20.0, %entry ], [ %for.1.next, %loop ]
  %iv = phi i64 [ 1, %entry ], [ %iv.next, %loop ]
  %add.1 = fadd double 10.0, %for.2
  %add.2 = fadd double %add.1, %for.1
  %iv.next = add nuw nsw i64 %iv, 1
  %gep.ptr = getelementptr inbounds double, ptr %ptr, i64 %iv
  %for.1.next  = load double, ptr %gep.ptr, align 8
  store double %add.2, ptr %gep.ptr
  %exitcond.not = icmp eq i64 %iv.next, 1000
  br i1 %exitcond.not, label %exit, label %loop

exit:
  ret void
}


define void @test_for_sink_instruction_after_same_incoming_2(ptr %ptr) {
; CHECK-LABEL: @test_for_sink_instruction_after_same_incoming_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR:%.*]] = phi <4 x double> [ <double poison, double poison, double poison, double 2.000000e+01>, [[VECTOR_PH]] ], [ [[WIDE_LOAD:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR1:%.*]] = phi <4 x double> [ <double poison, double poison, double poison, double 1.000000e+01>, [[VECTOR_PH]] ], [ [[WIDE_LOAD]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i64 1, [[INDEX]]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds double, ptr [[PTR:%.*]], i64 [[OFFSET_IDX]]
; CHECK-NEXT:    [[WIDE_LOAD]] = load <4 x double>, ptr [[TMP1]], align 8
; CHECK-NEXT:    [[TMP3:%.*]] = shufflevector <4 x double> [[VECTOR_RECUR1]], <4 x double> [[WIDE_LOAD]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP4:%.*]] = shufflevector <4 x double> [[VECTOR_RECUR]], <4 x double> [[WIDE_LOAD]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; CHECK-NEXT:    [[TMP5:%.*]] = fadd <4 x double> splat (double 1.000000e+01), [[TMP4]]
; CHECK-NEXT:    [[TMP6:%.*]] = fadd <4 x double> [[TMP5]], [[TMP3]]
; CHECK-NEXT:    store <4 x double> [[TMP6]], ptr [[TMP1]], align 8
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i64 [[INDEX_NEXT]], 996
; CHECK-NEXT:    br i1 [[TMP7]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP24:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[VECTOR_RECUR_EXTRACT2:%.*]] = extractelement <4 x double> [[WIDE_LOAD]], i32 3
; CHECK-NEXT:    br label [[SCALAR_PH:%.*]]
; CHECK:       scalar.ph:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[SCALAR_RECUR:%.*]] = phi double [ [[VECTOR_RECUR_EXTRACT2]], [[SCALAR_PH]] ], [ [[FOR_1_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[SCALAR_RECUR4:%.*]] = phi double [ [[VECTOR_RECUR_EXTRACT2]], [[SCALAR_PH]] ], [ [[FOR_1_NEXT]], [[LOOP]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 997, [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[ADD_1:%.*]] = fadd double 1.000000e+01, [[SCALAR_RECUR]]
; CHECK-NEXT:    [[ADD_2:%.*]] = fadd double [[ADD_1]], [[SCALAR_RECUR4]]
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[GEP_PTR:%.*]] = getelementptr inbounds double, ptr [[PTR]], i64 [[IV]]
; CHECK-NEXT:    [[FOR_1_NEXT]] = load double, ptr [[GEP_PTR]], align 8
; CHECK-NEXT:    store double [[ADD_2]], ptr [[GEP_PTR]], align 8
; CHECK-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], 1000
; CHECK-NEXT:    br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP]], !llvm.loop [[LOOP25:![0-9]+]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %for.2 = phi double [ 20.0, %entry ], [ %for.1.next, %loop ]
  %for.1 = phi double [ 10.0, %entry ], [ %for.1.next, %loop ]
  %iv = phi i64 [ 1, %entry ], [ %iv.next, %loop ]
  %add.1 = fadd double 10.0, %for.2
  %add.2 = fadd double %add.1, %for.1
  %iv.next = add nuw nsw i64 %iv, 1
  %gep.ptr = getelementptr inbounds double, ptr %ptr, i64 %iv
  %for.1.next  = load double, ptr %gep.ptr, align 8
  store double %add.2, ptr %gep.ptr
  %exitcond.not = icmp eq i64 %iv.next, 1000
  br i1 %exitcond.not, label %exit, label %loop

exit:
  ret void
}