llvm/test/Transforms/LoopVectorize/vect.omp.persistence.ll

; RUN: opt < %s -O2 -force-vector-interleave=2 -force-vector-width=4 -debug-only=loop-vectorize -S 2>&1 | FileCheck %s
; REQUIRES: asserts

; CHECK: LV: Checking a loop in "foo"
; CHECK: LV: Loop hints: force=enabled

target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"

; Ensure that "llvm.loop.vectorize.enable" metadata was not lost even
; if loop was not rotated.
;
; See http://reviews.llvm.org/D3348 for details.
;
; CHECK-LABEL: @foo
; CHECK: !llvm.loop !0
; CHECK: !0 = distinct !{!0, !1}
; CHECK: !1 = !{!"llvm.loop.vectorize.enable", i1 true}
define i32 @foo(i32 %a) {
entry:
  br label %loop_cond

loop_cond:
  %indx = phi i32 [ 1, %entry ], [ %inc, %loop_inc ]
  %cmp = icmp ne i32 %indx, %a
  br i1 %cmp, label %return, label %loop_inc

loop_inc:
  %inc = add i32 %indx, 1
  br label %loop_cond, !llvm.loop !0

return:
  ret i32 0
}

!0 = !{!0, !1}
!1 = !{!"llvm.loop.vectorize.enable", i1 true}