llvm/test/Transforms/LoopVectorize/induction-ptrcasts.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --filter-out-after "^scalar.ph" --version 6
; RUN: opt -passes=loop-vectorize -force-vector-width=1 -force-vector-interleave=2 -S %s | FileCheck --check-prefix=VF1 %s
; RUN: opt -passes=loop-vectorize -force-vector-width=2 -force-vector-interleave=1 -S %s | FileCheck --check-prefix=VF2 %s

@f = external global i32, align 4

define void @int_iv_based_on_pointer_iv(ptr %A) {
; VF1-LABEL: define void @int_iv_based_on_pointer_iv(
; VF1-SAME: ptr [[A:%.*]]) {
; VF1-NEXT:  [[ENTRY:.*:]]
; VF1-NEXT:    [[SMIN:%.*]] = call i64 @llvm.smin.i64(i64 add (i64 ptrtoint (ptr @f to i64), i64 -4), i64 0)
; VF1-NEXT:    [[TMP0:%.*]] = sub i64 add (i64 ptrtoint (ptr @f to i64), i64 -1), [[SMIN]]
; VF1-NEXT:    [[TMP1:%.*]] = lshr i64 [[TMP0]], 2
; VF1-NEXT:    [[TMP2:%.*]] = add nuw nsw i64 [[TMP1]], 1
; VF1-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP2]], 2
; VF1-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; VF1:       [[VECTOR_PH]]:
; VF1-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[TMP2]], 2
; VF1-NEXT:    [[N_VEC:%.*]] = sub i64 [[TMP2]], [[N_MOD_VF]]
; VF1-NEXT:    [[TMP3:%.*]] = mul i64 [[N_VEC]], 4
; VF1-NEXT:    [[TMP4:%.*]] = mul i64 [[N_VEC]], 4
; VF1-NEXT:    [[TMP5:%.*]] = getelementptr i8, ptr null, i64 [[TMP4]]
; VF1-NEXT:    br label %[[VECTOR_BODY:.*]]
; VF1:       [[VECTOR_BODY]]:
; VF1-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; VF1-NEXT:    [[OFFSET_IDX:%.*]] = mul i64 [[INDEX]], 4
; VF1-NEXT:    [[INDUCTION3:%.*]] = add i64 [[OFFSET_IDX]], 4
; VF1-NEXT:    [[TMP7:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 [[OFFSET_IDX]]
; VF1-NEXT:    [[TMP8:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 [[INDUCTION3]]
; VF1-NEXT:    store i8 0, ptr [[TMP7]], align 1
; VF1-NEXT:    store i8 0, ptr [[TMP8]], align 1
; VF1-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
; VF1-NEXT:    [[TMP9:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; VF1-NEXT:    br i1 [[TMP9]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; VF1:       [[MIDDLE_BLOCK]]:
; VF1-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[TMP2]], [[N_VEC]]
; VF1-NEXT:    br i1 [[CMP_N]], [[EXIT:label %.*]], label %[[SCALAR_PH]]
; VF1:       [[SCALAR_PH]]:
;
; VF2-LABEL: define void @int_iv_based_on_pointer_iv(
; VF2-SAME: ptr [[A:%.*]]) {
; VF2-NEXT:  [[ENTRY:.*:]]
; VF2-NEXT:    [[SMIN:%.*]] = call i64 @llvm.smin.i64(i64 add (i64 ptrtoint (ptr @f to i64), i64 -4), i64 0)
; VF2-NEXT:    [[TMP0:%.*]] = sub i64 add (i64 ptrtoint (ptr @f to i64), i64 -1), [[SMIN]]
; VF2-NEXT:    [[TMP1:%.*]] = lshr i64 [[TMP0]], 2
; VF2-NEXT:    [[TMP2:%.*]] = add nuw nsw i64 [[TMP1]], 1
; VF2-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP2]], 2
; VF2-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; VF2:       [[VECTOR_PH]]:
; VF2-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[TMP2]], 2
; VF2-NEXT:    [[N_VEC:%.*]] = sub i64 [[TMP2]], [[N_MOD_VF]]
; VF2-NEXT:    [[TMP3:%.*]] = mul i64 [[N_VEC]], 4
; VF2-NEXT:    [[TMP6:%.*]] = mul i64 [[N_VEC]], 4
; VF2-NEXT:    [[TMP5:%.*]] = getelementptr i8, ptr null, i64 [[TMP6]]
; VF2-NEXT:    br label %[[VECTOR_BODY:.*]]
; VF2:       [[VECTOR_BODY]]:
; VF2-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; VF2-NEXT:    [[OFFSET_IDX:%.*]] = mul i64 [[INDEX]], 4
; VF2-NEXT:    [[TMP4:%.*]] = add i64 [[OFFSET_IDX]], 4
; VF2-NEXT:    [[TMP9:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 [[OFFSET_IDX]]
; VF2-NEXT:    [[TMP10:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 [[TMP4]]
; VF2-NEXT:    store i8 0, ptr [[TMP9]], align 1
; VF2-NEXT:    store i8 0, ptr [[TMP10]], align 1
; VF2-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
; VF2-NEXT:    [[TMP11:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; VF2-NEXT:    br i1 [[TMP11]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; VF2:       [[MIDDLE_BLOCK]]:
; VF2-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[TMP2]], [[N_VEC]]
; VF2-NEXT:    br i1 [[CMP_N]], [[EXIT:label %.*]], label %[[SCALAR_PH]]
; VF2:       [[SCALAR_PH]]:
;
entry:
  br label %loop

loop:
  %iv.int = phi i64 [ 0, %entry ], [ %iv.int.next, %loop ]
  %iv.ptr = phi ptr [ null, %entry ], [ %iv.ptr.next, %loop ]
  %iv.ptr.next = getelementptr inbounds i32, ptr %iv.ptr, i64 1
  %gep.A = getelementptr inbounds i8, ptr %A, i64 %iv.int
  store i8 0, ptr %gep.A
  %iv.int.next = ptrtoint ptr %iv.ptr.next to i64
  %sub.ptr.sub = sub i64 ptrtoint (ptr @f to i64), %iv.int.next
  %cmp = icmp sgt i64 %sub.ptr.sub, 0
  br i1 %cmp, label %loop, label %exit

exit:
  ret void
}