; LLVM IR from hlzz/libvot :: src/vocab_tree/clustering.ll (ZN3vot16GetIntialCentersEmiPm)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN3vot16GetIntialCentersEmiPm(i64 noundef %0, i32 noundef %1, ptr noundef %2) #0 {
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i64, align 8
  %9 = alloca i32, align 4
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %49, %3
  %11 = load i32, ptr %7, align 4, !tbaa !9
  %12 = load i32, ptr %5, align 4, !tbaa !9
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %52

15:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %16 = call i32 @rand() #3
  %17 = sext i32 %16 to i64
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = urem i64 %17, %18
  store i64 %19, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %20

20:                                               ; preds = %36, %15
  %21 = load i32, ptr %9, align 4, !tbaa !9
  %22 = load i32, ptr %7, align 4, !tbaa !9
  %23 = icmp slt i32 %21, %22
  br i1 %23, label %24, label %39

24:                                               ; preds = %20
  %25 = load i64, ptr %8, align 8, !tbaa !5
  %26 = load ptr, ptr %6, align 8, !tbaa !11
  %27 = load i32, ptr %9, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds i64, ptr %26, i64 %28
  %30 = load i64, ptr %29, align 8, !tbaa !5
  %31 = icmp eq i64 %25, %30
  br i1 %31, label %32, label %35

32:                                               ; preds = %24
  %33 = load i32, ptr %7, align 4, !tbaa !9
  %34 = add nsw i32 %33, -1
  store i32 %34, ptr %7, align 4, !tbaa !9
  store i32 -1, ptr %9, align 4, !tbaa !9
  br label %39

35:                                               ; preds = %24
  br label %36

36:                                               ; preds = %35
  %37 = load i32, ptr %9, align 4, !tbaa !9
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %9, align 4, !tbaa !9
  br label %20, !llvm.loop !13

39:                                               ; preds = %32, %20
  %40 = load i32, ptr %9, align 4, !tbaa !9
  %41 = icmp ne i32 %40, -1
  br i1 %41, label %42, label %48

42:                                               ; preds = %39
  %43 = load i64, ptr %8, align 8, !tbaa !5
  %44 = load ptr, ptr %6, align 8, !tbaa !11
  %45 = load i32, ptr %7, align 4, !tbaa !9
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds i64, ptr %44, i64 %46
  store i64 %43, ptr %47, align 8, !tbaa !5
  br label %48

48:                                               ; preds = %42, %39
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %49

49:                                               ; preds = %48
  %50 = load i32, ptr %7, align 4, !tbaa !9
  %51 = add nsw i32 %50, 1
  store i32 %51, ptr %7, align 4, !tbaa !9
  br label %10, !llvm.loop !15

52:                                               ; preds = %14
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind
declare i32 @rand() #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"any pointer", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN3vot16GetIntialCentersEmiPm(i64 noundef %0, i32 noundef %1, ptr nocapture noundef %2) local_unnamed_addr #0 {
  %4 = icmp sgt i32 %1, 0
  br i1 %4, label %.lr.ph21, label %._crit_edge22

._crit_edge22:                                    ; preds = %16, %3
  ret void

.lr.ph21:                                         ; preds = %3, %16
  %.01419 = phi i32 [ %17, %16 ], [ 0, %3 ]
  %5 = tail call i32 @rand() #2
  %6 = sext i32 %5 to i64
  %7 = urem i64 %6, %0
  %8 = icmp sgt i32 %.01419, 0
  br i1 %8, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %.lr.ph21
  %wide.trip.count = zext nneg i32 %.01419 to i64
  br label %.lr.ph

9:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.lr.ph.preheader, %9
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %9 ]
  %10 = getelementptr inbounds i64, ptr %2, i64 %indvars.iv
  %11 = load i64, ptr %10, align 8, !tbaa !7
  %12 = icmp eq i64 %7, %11
  br i1 %12, label %.thread, label %9

.thread:                                          ; preds = %.lr.ph
  %13 = add nsw i32 %.01419, -1
  br label %16

._crit_edge:                                      ; preds = %9, %.lr.ph21
  %14 = sext i32 %.01419 to i64
  %15 = getelementptr inbounds i64, ptr %2, i64 %14
  store i64 %7, ptr %15, align 8, !tbaa !7
  br label %16

16:                                               ; preds = %.thread, %._crit_edge
  %.11517 = phi i32 [ %13, %.thread ], [ %.01419, %._crit_edge ]
  %17 = add nsw i32 %.11517, 1
  %18 = icmp slt i32 %17, %1
  br i1 %18, label %.lr.ph21, label %._crit_edge22, !llvm.loop !11
}

; Function Attrs: nounwind
declare i32 @rand() local_unnamed_addr #1

attributes #0 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"long", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = distinct !{!11, !6}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass