test/Transforms/LoopVectorize/step-vector-i1-wrapping.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 -S -passes=loop-vectorize -force-vector-width=4 < %s | FileCheck %s

define void @test() {
; CHECK-LABEL: define void @test() {
; 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:    [[VEC_IND:%.*]] = phi <4 x i1> [ <i1 false, i1 true, i1 false, i1 true>, %[[VECTOR_PH]] ], [ [[VEC_IND]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = select <4 x i1> [[VEC_IND]], <4 x i32> splat (i32 1), <4 x i32> zeroinitializer
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i64 [[INDEX_NEXT]], -4
; CHECK-NEXT:    br i1 [[TMP1]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <4 x i32> [[TMP0]], i32 3
; CHECK-NEXT:    br label %[[SCALAR_PH:.*]]
; CHECK:       [[SCALAR_PH]]:
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 1, %entry ], [ %iv.inc, %loop ]
  %iv2 = phi i1 [ false, %entry ], [ %iv2.next, %loop ]
  %iv3 = phi i32 [ 0, %entry ], [ %iv3.next, %loop ]
  %iv3.next = select i1 %iv2, i32 1, i32 0
  %iv2.next = xor i1 %iv2, true
  %iv.inc = add i64 %iv, 1
  %cmp = icmp eq i64 %iv.inc, 0
  br i1 %cmp, label %exit, label %loop

exit:
  ret void
}