llvm-project/llvm/test/Transforms/LoopVectorize/vector-loop-backedge-elimination-outside-iv-users.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -passes='loop-vectorize' -force-vector-width=8 -force-vector-interleave=2 -S %s | FileCheck --check-prefixes=CHECK %s

target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"

define i64 @remove_loop_region_int_iv_used_outside(ptr %dst) {
; CHECK-LABEL: define i64 @remove_loop_region_int_iv_used_outside(
; CHECK-SAME: ptr [[DST:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr ptr, ptr [[DST]], i32 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[DST]], align 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[TMP2]], align 8
; CHECK-NEXT:    br label %[[MIDDLE_BLOCK:.*]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br label %[[EXIT:.*]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    ret i64 15
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr ptr, ptr %dst, i64 %iv
  store ptr null, ptr %gep, align 8
  %iv.next = add i64 %iv, 1
  %ec = icmp eq i64 %iv.next, 16
  br i1 %ec, label %exit, label %loop

exit:
  %res = phi i64 [ %iv, %loop ]
  ret i64 %res
}

define i64 @remove_loop_region_int_iv_inc_used_outside(ptr %dst) {
; CHECK-LABEL: define i64 @remove_loop_region_int_iv_inc_used_outside(
; CHECK-SAME: ptr [[DST:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr ptr, ptr [[DST]], i32 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[DST]], align 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[TMP2]], align 8
; CHECK-NEXT:    br label %[[MIDDLE_BLOCK:.*]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br label %[[EXIT:.*]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    ret i64 16
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr ptr, ptr %dst, i64 %iv
  store ptr null, ptr %gep, align 8
  %iv.next = add i64 %iv, 1
  %ec = icmp eq i64 %iv.next, 16
  br i1 %ec, label %exit, label %loop

exit:
  %res = phi i64 [ %iv.next, %loop ]
  ret i64 %res
}

define ptr @remove_loop_region_ptr_iv_used_outside(ptr %dst) {
; CHECK-LABEL: define ptr @remove_loop_region_ptr_iv_used_outside(
; CHECK-SAME: ptr [[DST:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[TMP0:%.*]] = getelementptr i8, ptr [[DST]], i64 128
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr ptr, ptr [[DST]], i32 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[DST]], align 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[TMP2]], align 8
; CHECK-NEXT:    br label %[[MIDDLE_BLOCK:.*]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[IND_ESCAPE:%.*]] = getelementptr i8, ptr [[TMP0]], i64 -8
; CHECK-NEXT:    br label %[[EXIT:.*]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    ret ptr [[IND_ESCAPE]]
;
entry:
  br label %loop

loop:
  %ptr.iv = phi ptr [ %dst, %entry ], [ %ptr.iv.next, %loop ]
  %int.iv = phi i64 [ 0, %entry ], [ %int.iv.next, %loop ]
  store ptr null, ptr %ptr.iv, align 8
  %int.iv.next = add i64 %int.iv, 1
  %ptr.iv.next = getelementptr i8, ptr %ptr.iv, i64 8
  %ec = icmp eq i64 %int.iv.next, 16
  br i1 %ec, label %exit, label %loop

exit:
  %res = phi ptr [ %ptr.iv, %loop ]
  ret ptr %res
}

define ptr @remove_loop_region_ptr_iv_inc_used_outside(ptr %dst) {
; CHECK-LABEL: define ptr @remove_loop_region_ptr_iv_inc_used_outside(
; CHECK-SAME: ptr [[DST:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[TMP0:%.*]] = getelementptr i8, ptr [[DST]], i64 128
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr ptr, ptr [[DST]], i32 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[DST]], align 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[TMP2]], align 8
; CHECK-NEXT:    br label %[[MIDDLE_BLOCK:.*]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br label %[[EXIT:.*]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    ret ptr [[TMP0]]
;
entry:
  br label %loop

loop:
  %ptr.iv = phi ptr [ %dst, %entry ], [ %ptr.iv.next, %loop ]
  %int.iv = phi i64 [ 0, %entry ], [ %int.iv.next, %loop ]
  store ptr null, ptr %ptr.iv, align 8
  %int.iv.next = add i64 %int.iv, 1
  %ptr.iv.next = getelementptr i8, ptr %ptr.iv, i64 8
  %ec = icmp eq i64 %int.iv.next, 16
  br i1 %ec, label %exit, label %loop

exit:
  %res = phi ptr [ %ptr.iv.next, %loop ]
  ret ptr %res
}