test/Transforms/LoopVectorize/load-deref-pred-poison-ub-ops-feeding-pointer.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --filter-out-after "scalar.ph:" --version 5
; RUN: opt -p loop-vectorize -force-widen-divrem-via-safe-divisor=false -force-vector-width=2 -S %s | FileCheck %s

target datalayout="p:16:16"

@src = global [16 x i64] zeroinitializer

; Test cases for https://github.com/llvm/llvm-project/issues/142957

; Cannot speculatively execute %l, because %div may trigger UB and must be
; predicated.
define void @ptr_depends_on_sdiv(ptr noalias %dst, i16 noundef %off) {
; CHECK-LABEL: define void @ptr_depends_on_sdiv(
; CHECK-SAME: ptr noalias [[DST:%.*]], i16 noundef [[OFF:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[PRED_STORE_CONTINUE4:.*]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <2 x i16> [ <i16 9, i16 10>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[PRED_STORE_CONTINUE4]] ]
; CHECK-NEXT:    [[DOTCAST:%.*]] = trunc i32 [[INDEX]] to i16
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i16 9, [[DOTCAST]]
; CHECK-NEXT:    [[TMP0:%.*]] = icmp eq <2 x i16> [[VEC_IND]], splat (i16 10)
; CHECK-NEXT:    [[TMP6:%.*]] = extractelement <2 x i1> [[TMP0]], i32 0
; CHECK-NEXT:    br i1 [[TMP6]], label %[[PRED_SDIV_IF:.*]], label %[[PRED_SDIV_CONTINUE:.*]]
; CHECK:       [[PRED_SDIV_IF]]:
; CHECK-NEXT:    [[TMP2:%.*]] = sdiv i16 24316, [[OFF]]
; CHECK-NEXT:    [[TMP3:%.*]] = insertelement <2 x i16> poison, i16 [[TMP2]], i32 0
; CHECK-NEXT:    br label %[[PRED_SDIV_CONTINUE]]
; CHECK:       [[PRED_SDIV_CONTINUE]]:
; CHECK-NEXT:    [[TMP4:%.*]] = phi <2 x i16> [ poison, %[[VECTOR_BODY]] ], [ [[TMP3]], %[[PRED_SDIV_IF]] ]
; CHECK-NEXT:    [[TMP14:%.*]] = extractelement <2 x i1> [[TMP0]], i32 1
; CHECK-NEXT:    br i1 [[TMP14]], label %[[PRED_SDIV_IF1:.*]], label %[[PRED_SDIV_CONTINUE2:.*]]
; CHECK:       [[PRED_SDIV_IF1]]:
; CHECK-NEXT:    [[TMP18:%.*]] = sdiv i16 24316, [[OFF]]
; CHECK-NEXT:    [[TMP7:%.*]] = insertelement <2 x i16> [[TMP4]], i16 [[TMP18]], i32 1
; CHECK-NEXT:    br label %[[PRED_SDIV_CONTINUE2]]
; CHECK:       [[PRED_SDIV_CONTINUE2]]:
; CHECK-NEXT:    [[TMP8:%.*]] = phi <2 x i16> [ [[TMP4]], %[[PRED_SDIV_CONTINUE]] ], [ [[TMP7]], %[[PRED_SDIV_IF1]] ]
; CHECK-NEXT:    [[TMP21:%.*]] = add <2 x i16> [[VEC_IND]], splat (i16 16383)
; CHECK-NEXT:    [[TMP22:%.*]] = shl <2 x i16> [[TMP8]], splat (i16 14)
; CHECK-NEXT:    [[TMP23:%.*]] = sub <2 x i16> [[TMP21]], [[TMP22]]
; CHECK-NEXT:    [[TMP19:%.*]] = extractelement <2 x i1> [[TMP0]], i32 0
; CHECK-NEXT:    br i1 [[TMP19]], label %[[PRED_STORE_IF:.*]], label %[[PRED_STORE_CONTINUE:.*]]
; CHECK:       [[PRED_STORE_IF]]:
; CHECK-NEXT:    [[TMP13:%.*]] = extractelement <2 x i16> [[TMP23]], i32 0
; CHECK-NEXT:    [[TMP24:%.*]] = getelementptr inbounds i64, ptr @src, i16 [[TMP13]]
; CHECK-NEXT:    [[TMP9:%.*]] = load i64, ptr [[TMP24]], align 1
; CHECK-NEXT:    [[TMP10:%.*]] = add i16 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[TMP11:%.*]] = getelementptr inbounds i64, ptr [[DST]], i16 [[TMP10]]
; CHECK-NEXT:    store i64 [[TMP9]], ptr [[TMP11]], align 1
; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE]]
; CHECK:       [[PRED_STORE_CONTINUE]]:
; CHECK-NEXT:    [[TMP12:%.*]] = extractelement <2 x i1> [[TMP0]], i32 1
; CHECK-NEXT:    br i1 [[TMP12]], label %[[PRED_STORE_IF3:.*]], label %[[PRED_STORE_CONTINUE4]]
; CHECK:       [[PRED_STORE_IF3]]:
; CHECK-NEXT:    [[TMP25:%.*]] = extractelement <2 x i16> [[TMP23]], i32 1
; CHECK-NEXT:    [[TMP20:%.*]] = getelementptr inbounds i64, ptr @src, i16 [[TMP25]]
; CHECK-NEXT:    [[TMP15:%.*]] = load i64, ptr [[TMP20]], align 1
; CHECK-NEXT:    [[TMP16:%.*]] = add i16 [[OFFSET_IDX]], 1
; CHECK-NEXT:    [[TMP17:%.*]] = getelementptr inbounds i64, ptr [[DST]], i16 [[TMP16]]
; CHECK-NEXT:    store i64 [[TMP15]], ptr [[TMP17]], align 1
; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE4]]
; CHECK:       [[PRED_STORE_CONTINUE4]]:
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <2 x i16> [[VEC_IND]], splat (i16 2)
; CHECK-NEXT:    br i1 true, label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br i1 true, [[EXIT:label %.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
;
entry:
  br label %loop.header

loop.header:
  %iv = phi i16 [ 9, %entry ], [ %iv.next, %loop.latch ]
  %cmp1 = icmp eq i16 %iv, 10
  br i1 %cmp1, label %if.then, label %loop.latch

if.then:
  %div = sdiv i16 24316, %off
  %add.iv = add i16 %iv, 16383
  %s = shl i16 %div, 14
  %sub6 = sub i16 %add.iv, %s
  %gep.src = getelementptr inbounds i64, ptr @src, i16 %sub6
  %l = load i64, ptr %gep.src, align 1
  %gep.dst = getelementptr inbounds i64, ptr %dst, i16 %iv
  store i64 %l, ptr %gep.dst, align 1
  br label %loop.latch

loop.latch:
  %iv.next = add i16 %iv, 1
  %ec = icmp eq i16 %iv.next, 11
  br i1 %ec, label %exit, label %loop.header

exit:
  ret void
}

; Cannot speculatively execute %l, because %off may be poison.
define void @ptr_depends_on_possibly_poison_value(ptr noalias %dst, i16 %off) {
; CHECK-LABEL: define void @ptr_depends_on_possibly_poison_value(
; CHECK-SAME: ptr noalias [[DST:%.*]], i16 [[OFF:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <2 x i16> poison, i16 [[OFF]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <2 x i16> [[BROADCAST_SPLATINSERT]], <2 x i16> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP0:%.*]] = sub <2 x i16> splat (i16 1), [[BROADCAST_SPLAT]]
; CHECK-NEXT:    [[TMP1:%.*]] = add <2 x i16> [[TMP0]], [[BROADCAST_SPLAT]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[PRED_STORE_CONTINUE2:.*]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <2 x i16> [ <i16 9, i16 10>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[PRED_STORE_CONTINUE2]] ]
; CHECK-NEXT:    [[DOTCAST:%.*]] = trunc i32 [[INDEX]] to i16
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i16 9, [[DOTCAST]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq <2 x i16> [[VEC_IND]], splat (i16 10)
; CHECK-NEXT:    [[TMP3:%.*]] = add <2 x i16> [[VEC_IND]], [[TMP1]]
; CHECK-NEXT:    [[TMP6:%.*]] = extractelement <2 x i1> [[TMP2]], i32 0
; CHECK-NEXT:    br i1 [[TMP6]], label %[[PRED_STORE_IF:.*]], label %[[PRED_STORE_CONTINUE:.*]]
; CHECK:       [[PRED_STORE_IF]]:
; CHECK-NEXT:    [[TMP5:%.*]] = extractelement <2 x i16> [[TMP3]], i32 0
; CHECK-NEXT:    [[TMP14:%.*]] = getelementptr inbounds i64, ptr @src, i16 [[TMP5]]
; CHECK-NEXT:    [[TMP9:%.*]] = load i64, ptr [[TMP14]], align 1
; CHECK-NEXT:    [[TMP7:%.*]] = add i16 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr inbounds i64, ptr [[DST]], i16 [[TMP7]]
; CHECK-NEXT:    store i64 [[TMP9]], ptr [[TMP8]], align 1
; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE]]
; CHECK:       [[PRED_STORE_CONTINUE]]:
; CHECK-NEXT:    [[TMP10:%.*]] = extractelement <2 x i1> [[TMP2]], i32 1
; CHECK-NEXT:    br i1 [[TMP10]], label %[[PRED_STORE_IF1:.*]], label %[[PRED_STORE_CONTINUE2]]
; CHECK:       [[PRED_STORE_IF1]]:
; CHECK-NEXT:    [[TMP15:%.*]] = extractelement <2 x i16> [[TMP3]], i32 1
; CHECK-NEXT:    [[TMP16:%.*]] = getelementptr inbounds i64, ptr @src, i16 [[TMP15]]
; CHECK-NEXT:    [[TMP13:%.*]] = load i64, ptr [[TMP16]], align 1
; CHECK-NEXT:    [[TMP11:%.*]] = add i16 [[OFFSET_IDX]], 1
; CHECK-NEXT:    [[TMP12:%.*]] = getelementptr inbounds i64, ptr [[DST]], i16 [[TMP11]]
; CHECK-NEXT:    store i64 [[TMP13]], ptr [[TMP12]], align 1
; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE2]]
; CHECK:       [[PRED_STORE_CONTINUE2]]:
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <2 x i16> [[VEC_IND]], splat (i16 2)
; CHECK-NEXT:    br i1 true, label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br i1 true, [[EXIT:label %.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
;
entry:
  br label %loop.header

loop.header:
  %iv = phi i16 [ 9, %entry ], [ %iv.next, %loop.latch ]
  %cmp1 = icmp eq i16 %iv, 10
  br i1 %cmp1, label %if.then, label %loop.latch

if.then:
  %sub = sub i16 1, %off
  %add = add i16 %sub, %off
  %add.iv = add i16 %iv, %add
  %gep.src = getelementptr inbounds i64, ptr @src, i16 %add.iv
  %l = load i64, ptr %gep.src, align 1
  %gep.dst = getelementptr inbounds i64, ptr %dst, i16 %iv
  store i64 %l, ptr %gep.dst, align 1
  br label %loop.latch

loop.latch:
  %iv.next = add i16 %iv, 1
  %ec = icmp eq i16 %iv.next, 11
  br i1 %ec, label %exit, label %loop.header

exit:
  ret void
}

define void @ptr_doesnt_depend_on_poison_or_ub(ptr noalias %dst, i16 noundef %off) {
; CHECK-LABEL: define void @ptr_doesnt_depend_on_poison_or_ub(
; CHECK-SAME: ptr noalias [[DST:%.*]], i16 noundef [[OFF:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[TMP0:%.*]] = sub i16 1, [[OFF]]
; CHECK-NEXT:    [[TMP1:%.*]] = add i16 [[TMP0]], [[OFF]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[PRED_STORE_CONTINUE2:.*]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <2 x i16> [ <i16 9, i16 10>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[PRED_STORE_CONTINUE2]] ]
; CHECK-NEXT:    [[DOTCAST:%.*]] = trunc i32 [[INDEX]] to i16
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i16 9, [[DOTCAST]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq <2 x i16> [[VEC_IND]], splat (i16 10)
; CHECK-NEXT:    [[TMP3:%.*]] = add i16 [[OFFSET_IDX]], [[TMP1]]
; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr i64, ptr @src, i16 [[TMP3]]
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr i64, ptr [[TMP4]], i32 0
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <2 x i64>, ptr [[TMP5]], align 1
; CHECK-NEXT:    [[TMP6:%.*]] = extractelement <2 x i1> [[TMP2]], i32 0
; CHECK-NEXT:    br i1 [[TMP6]], label %[[PRED_STORE_IF:.*]], label %[[PRED_STORE_CONTINUE:.*]]
; CHECK:       [[PRED_STORE_IF]]:
; CHECK-NEXT:    [[TMP7:%.*]] = add i16 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr inbounds i64, ptr [[DST]], i16 [[TMP7]]
; CHECK-NEXT:    [[TMP9:%.*]] = extractelement <2 x i64> [[WIDE_LOAD]], i32 0
; CHECK-NEXT:    store i64 [[TMP9]], ptr [[TMP8]], align 1
; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE]]
; CHECK:       [[PRED_STORE_CONTINUE]]:
; CHECK-NEXT:    [[TMP10:%.*]] = extractelement <2 x i1> [[TMP2]], i32 1
; CHECK-NEXT:    br i1 [[TMP10]], label %[[PRED_STORE_IF1:.*]], label %[[PRED_STORE_CONTINUE2]]
; CHECK:       [[PRED_STORE_IF1]]:
; CHECK-NEXT:    [[TMP11:%.*]] = add i16 [[OFFSET_IDX]], 1
; CHECK-NEXT:    [[TMP12:%.*]] = getelementptr inbounds i64, ptr [[DST]], i16 [[TMP11]]
; CHECK-NEXT:    [[TMP13:%.*]] = extractelement <2 x i64> [[WIDE_LOAD]], i32 1
; CHECK-NEXT:    store i64 [[TMP13]], ptr [[TMP12]], align 1
; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE2]]
; CHECK:       [[PRED_STORE_CONTINUE2]]:
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <2 x i16> [[VEC_IND]], splat (i16 2)
; CHECK-NEXT:    br i1 true, label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br i1 true, [[EXIT:label %.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
;
entry:
  br label %loop.header

loop.header:
  %iv = phi i16 [ 9, %entry ], [ %iv.next, %loop.latch ]
  %cmp1 = icmp eq i16 %iv, 10
  br i1 %cmp1, label %if.then, label %loop.latch

if.then:
  %sub = sub i16 1, %off
  %add = add i16 %sub, %off
  %add.iv = add i16 %iv, %add
  %gep.src = getelementptr inbounds i64, ptr @src, i16 %add.iv
  %l = load i64, ptr %gep.src, align 1
  %gep.dst = getelementptr inbounds i64, ptr %dst, i16 %iv
  store i64 %l, ptr %gep.dst, align 1
  br label %loop.latch

loop.latch:
  %iv.next = add i16 %iv, 1
  %ec = icmp eq i16 %iv.next, 11
  br i1 %ec, label %exit, label %loop.header

exit:
  ret void
}

; Cannot speculatively execute %l, because %off may be poison.
define void @ptr_depends_on_possibly_poison_value_from_load(ptr noalias %dst) {
; CHECK-LABEL: define void @ptr_depends_on_possibly_poison_value_from_load(
; CHECK-SAME: ptr noalias [[DST:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[PRED_STORE_CONTINUE2:.*]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <2 x i16> [ <i16 9, i16 10>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[PRED_STORE_CONTINUE2]] ]
; CHECK-NEXT:    [[DOTCAST:%.*]] = trunc i32 [[INDEX]] to i16
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i16 9, [[DOTCAST]]
; CHECK-NEXT:    [[TMP0:%.*]] = load i16, ptr @src, align 1
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <2 x i16> poison, i16 [[TMP0]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <2 x i16> [[BROADCAST_SPLATINSERT]], <2 x i16> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq <2 x i16> [[VEC_IND]], splat (i16 10)
; CHECK-NEXT:    [[TMP2:%.*]] = sub <2 x i16> splat (i16 1), [[BROADCAST_SPLAT]]
; CHECK-NEXT:    [[TMP3:%.*]] = add <2 x i16> [[TMP2]], [[BROADCAST_SPLAT]]
; CHECK-NEXT:    [[TMP4:%.*]] = add <2 x i16> [[VEC_IND]], [[TMP3]]
; CHECK-NEXT:    [[TMP7:%.*]] = extractelement <2 x i1> [[TMP1]], i32 0
; CHECK-NEXT:    br i1 [[TMP7]], label %[[PRED_STORE_IF:.*]], label %[[PRED_STORE_CONTINUE:.*]]
; CHECK:       [[PRED_STORE_IF]]:
; CHECK-NEXT:    [[TMP6:%.*]] = extractelement <2 x i16> [[TMP4]], i32 0
; CHECK-NEXT:    [[TMP15:%.*]] = getelementptr inbounds i64, ptr @src, i16 [[TMP6]]
; CHECK-NEXT:    [[TMP10:%.*]] = load i64, ptr [[TMP15]], align 1
; CHECK-NEXT:    [[TMP8:%.*]] = add i16 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[TMP9:%.*]] = getelementptr inbounds i64, ptr [[DST]], i16 [[TMP8]]
; CHECK-NEXT:    store i64 [[TMP10]], ptr [[TMP9]], align 1
; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE]]
; CHECK:       [[PRED_STORE_CONTINUE]]:
; CHECK-NEXT:    [[TMP11:%.*]] = extractelement <2 x i1> [[TMP1]], i32 1
; CHECK-NEXT:    br i1 [[TMP11]], label %[[PRED_STORE_IF1:.*]], label %[[PRED_STORE_CONTINUE2]]
; CHECK:       [[PRED_STORE_IF1]]:
; CHECK-NEXT:    [[TMP16:%.*]] = extractelement <2 x i16> [[TMP4]], i32 1
; CHECK-NEXT:    [[TMP17:%.*]] = getelementptr inbounds i64, ptr @src, i16 [[TMP16]]
; CHECK-NEXT:    [[TMP14:%.*]] = load i64, ptr [[TMP17]], align 1
; CHECK-NEXT:    [[TMP12:%.*]] = add i16 [[OFFSET_IDX]], 1
; CHECK-NEXT:    [[TMP13:%.*]] = getelementptr inbounds i64, ptr [[DST]], i16 [[TMP12]]
; CHECK-NEXT:    store i64 [[TMP14]], ptr [[TMP13]], align 1
; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE2]]
; CHECK:       [[PRED_STORE_CONTINUE2]]:
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <2 x i16> [[VEC_IND]], splat (i16 2)
; CHECK-NEXT:    br i1 true, label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br i1 true, [[EXIT:label %.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
;
entry:
  br label %loop.header

loop.header:
  %iv = phi i16 [ 9, %entry ], [ %iv.next, %loop.latch ]
  %off = load i16, ptr @src, align 1
  %cmp1 = icmp eq i16 %iv, 10
  br i1 %cmp1, label %if.then, label %loop.latch

if.then:
  %sub = sub i16 1, %off
  %add = add i16 %sub, %off
  %add.iv = add i16 %iv, %add
  %gep.src = getelementptr inbounds i64, ptr @src, i16 %add.iv
  %l = load i64, ptr %gep.src, align 1
  %gep.dst = getelementptr inbounds i64, ptr %dst, i16 %iv
  store i64 %l, ptr %gep.dst, align 1
  br label %loop.latch

loop.latch:
  %iv.next = add i16 %iv, 1
  %ec = icmp eq i16 %iv.next, 11
  br i1 %ec, label %exit, label %loop.header

exit:
  ret void
}

; Can speculatively execute %l, because %off cannot be poison due to !noundef.
define void @ptr_depends_on_noundef_load(ptr noalias %dst) {
; CHECK-LABEL: define void @ptr_depends_on_noundef_load(
; CHECK-SAME: ptr noalias [[DST:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[PRED_STORE_CONTINUE2:.*]] ]
; CHECK-NEXT:    [[VEC_IND:%.*]] = phi <2 x i16> [ <i16 9, i16 10>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[PRED_STORE_CONTINUE2]] ]
; CHECK-NEXT:    [[DOTCAST:%.*]] = trunc i32 [[INDEX]] to i16
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i16 9, [[DOTCAST]]
; CHECK-NEXT:    [[TMP0:%.*]] = load i16, ptr @src, align 1, !noundef [[META10:![0-9]+]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq <2 x i16> [[VEC_IND]], splat (i16 10)
; CHECK-NEXT:    [[TMP2:%.*]] = sub i16 1, [[TMP0]]
; CHECK-NEXT:    [[TMP3:%.*]] = add i16 [[TMP2]], [[TMP0]]
; CHECK-NEXT:    [[TMP4:%.*]] = add i16 [[OFFSET_IDX]], [[TMP3]]
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr i64, ptr @src, i16 [[TMP4]]
; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr i64, ptr [[TMP5]], i32 0
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <2 x i64>, ptr [[TMP6]], align 1
; CHECK-NEXT:    [[TMP7:%.*]] = extractelement <2 x i1> [[TMP1]], i32 0
; CHECK-NEXT:    br i1 [[TMP7]], label %[[PRED_STORE_IF:.*]], label %[[PRED_STORE_CONTINUE:.*]]
; CHECK:       [[PRED_STORE_IF]]:
; CHECK-NEXT:    [[TMP8:%.*]] = add i16 [[OFFSET_IDX]], 0
; CHECK-NEXT:    [[TMP9:%.*]] = getelementptr inbounds i64, ptr [[DST]], i16 [[TMP8]]
; CHECK-NEXT:    [[TMP10:%.*]] = extractelement <2 x i64> [[WIDE_LOAD]], i32 0
; CHECK-NEXT:    store i64 [[TMP10]], ptr [[TMP9]], align 1
; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE]]
; CHECK:       [[PRED_STORE_CONTINUE]]:
; CHECK-NEXT:    [[TMP11:%.*]] = extractelement <2 x i1> [[TMP1]], i32 1
; CHECK-NEXT:    br i1 [[TMP11]], label %[[PRED_STORE_IF1:.*]], label %[[PRED_STORE_CONTINUE2]]
; CHECK:       [[PRED_STORE_IF1]]:
; CHECK-NEXT:    [[TMP12:%.*]] = add i16 [[OFFSET_IDX]], 1
; CHECK-NEXT:    [[TMP13:%.*]] = getelementptr inbounds i64, ptr [[DST]], i16 [[TMP12]]
; CHECK-NEXT:    [[TMP14:%.*]] = extractelement <2 x i64> [[WIDE_LOAD]], i32 1
; CHECK-NEXT:    store i64 [[TMP14]], ptr [[TMP13]], align 1
; CHECK-NEXT:    br label %[[PRED_STORE_CONTINUE2]]
; CHECK:       [[PRED_STORE_CONTINUE2]]:
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <2 x i16> [[VEC_IND]], splat (i16 2)
; CHECK-NEXT:    br i1 true, label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP11:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br i1 true, [[EXIT:label %.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
;
entry:
  br label %loop.header

loop.header:
  %iv = phi i16 [ 9, %entry ], [ %iv.next, %loop.latch ]
  %off = load i16, ptr @src, align 1, !noundef !{}
  %cmp1 = icmp eq i16 %iv, 10
  br i1 %cmp1, label %if.then, label %loop.latch

if.then:
  %sub = sub i16 1, %off
  %add = add i16 %sub, %off
  %add.iv = add i16 %iv, %add
  %gep.src = getelementptr inbounds i64, ptr @src, i16 %add.iv
  %l = load i64, ptr %gep.src, align 1
  %gep.dst = getelementptr inbounds i64, ptr %dst, i16 %iv
  store i64 %l, ptr %gep.dst, align 1
  br label %loop.latch

loop.latch:
  %iv.next = add i16 %iv, 1
  %ec = icmp eq i16 %iv.next, 11
  br i1 %ec, label %exit, label %loop.header

exit:
  ret void
}