test/Transforms/LoopVectorize/nounroll.ll

; REQUIRES: asserts
; RUN: opt < %s -passes='loop-vectorize' -debug-only=loop-vectorize -S 2>&1 | FileCheck %s

target datalayout = "e-m:e-i64:64-n32:64-S128-v256:256:256-v512:512:512"

; CHECK: LV: Checking a loop in 'f1'
; CHECK: LV: Loop hints: force=? width=0 interleave=1
define dso_local void @f1(i32 signext %n, ptr %A) {
entry:
  %cmp1 = icmp sgt i32 %n, 0
  br i1 %cmp1, label %for.body.preheader, label %for.end

for.body.preheader:                               ; preds = %entry
  %wide.trip.count = zext i32 %n to i64
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
  %arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
  %0 = trunc i64 %indvars.iv to i32
  store i32 %0, ptr %arrayidx, align 4
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond, label %for.body, label %for.end.loopexit, !llvm.loop !1

for.end.loopexit:                                 ; preds = %for.body
  br label %for.end

for.end:                                          ; preds = %for.end.loopexit, %entry
  ret void
}

; CHECK: LV: Checking a loop in 'f2'
; CHECK: LV: Loop hints: force=? width=0 interleave=4
define dso_local void @f2(i32 signext %n, ptr %A) {
entry:
  %cmp1 = icmp sgt i32 %n, 0
  br i1 %cmp1, label %for.body.preheader, label %for.end

for.body.preheader:                               ; preds = %entry
  %wide.trip.count = zext i32 %n to i64
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
  %arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
  %0 = trunc i64 %indvars.iv to i32
  store i32 %0, ptr %arrayidx, align 4
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond, label %for.body, label %for.end.loopexit, !llvm.loop !3

for.end.loopexit:                                 ; preds = %for.body
  br label %for.end

for.end:                                          ; preds = %for.end.loopexit, %entry
  ret void
}

; CHECK: LV: Checking a loop in 'f3'
; CHECK: LV: Loop hints: force=? width=0 interleave=1
define dso_local void @f3(i32 signext %n, ptr %A) {
entry:
  %cmp1 = icmp sgt i32 %n, 0
  br i1 %cmp1, label %for.body.preheader, label %for.end

for.body.preheader:                               ; preds = %entry
  %wide.trip.count = zext i32 %n to i64
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
  %arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
  %0 = trunc i64 %indvars.iv to i32
  store i32 %0, ptr %arrayidx, align 4
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond, label %for.body, label %for.end.loopexit, !llvm.loop !6

for.end.loopexit:                                 ; preds = %for.body
  br label %for.end

for.end:                                          ; preds = %for.end.loopexit, %entry
  ret void
}

!1 = distinct !{!1, !2}
!2 = !{!"llvm.loop.unroll.disable"}
!3 = distinct !{!3, !4, !5}
!4 = !{!"llvm.loop.unroll.disable"}
!5 = !{!"llvm.loop.interleave.count", i32 4}
!6 = distinct !{!6, !7, !8}
!7 = !{!"llvm.loop.mustprogress"}
!8 = !{!"llvm.loop.unroll.count", i32 1}