; LLVM IR from DimitrisJim/leetcode_solutions :: C/Algorithms (1403)

; 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: nounwind uwtable
declare dso_local i32 @cmpi(ptr noundef, ptr noundef) #0

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

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

; Function Attrs: nounwind uwtable
define dso_local ptr @minSubsequence(ptr noundef %0, i32 noundef %1, ptr noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store i32 0, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %12

12:                                               ; preds = %16, %3
  %13 = load i32, ptr %7, align 4, !tbaa !9
  %14 = load i32, ptr %5, align 4, !tbaa !9
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %16, label %25

16:                                               ; preds = %12
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = load i32, ptr %7, align 4, !tbaa !9
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %7, align 4, !tbaa !9
  %20 = sext i32 %18 to i64
  %21 = getelementptr inbounds i32, ptr %17, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !9
  %23 = load i32, ptr %8, align 4, !tbaa !9
  %24 = add nsw i32 %23, %22
  store i32 %24, ptr %8, align 4, !tbaa !9
  br label %12, !llvm.loop !11

25:                                               ; preds = %12
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = load i32, ptr %5, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  call void @qsort(ptr noundef %26, i64 noundef %28, i64 noundef 4, ptr noundef @cmpi)
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %29

29:                                               ; preds = %54, %25
  %30 = load i32, ptr %7, align 4, !tbaa !9
  %31 = load i32, ptr %5, align 4, !tbaa !9
  %32 = icmp slt i32 %30, %31
  br i1 %32, label %33, label %57

33:                                               ; preds = %29
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = load i32, ptr %7, align 4, !tbaa !9
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds i32, ptr %34, i64 %36
  %38 = load i32, ptr %37, align 4, !tbaa !9
  store i32 %38, ptr %10, align 4, !tbaa !9
  %39 = load i32, ptr %10, align 4, !tbaa !9
  %40 = load i32, ptr %8, align 4, !tbaa !9
  %41 = sub nsw i32 %40, %39
  store i32 %41, ptr %8, align 4, !tbaa !9
  %42 = load i32, ptr %10, align 4, !tbaa !9
  %43 = load i32, ptr %9, align 4, !tbaa !9
  %44 = add nsw i32 %43, %42
  store i32 %44, ptr %9, align 4, !tbaa !9
  %45 = load i32, ptr %9, align 4, !tbaa !9
  %46 = load i32, ptr %8, align 4, !tbaa !9
  %47 = sub nsw i32 %45, %46
  %48 = icmp sgt i32 %47, 0
  br i1 %48, label %49, label %50

49:                                               ; preds = %33
  store i32 4, ptr %11, align 4
  br label %51

50:                                               ; preds = %33
  store i32 0, ptr %11, align 4
  br label %51

51:                                               ; preds = %50, %49
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  %52 = load i32, ptr %11, align 4
  switch i32 %52, label %62 [
    i32 0, label %53
    i32 4, label %57
  ]

53:                                               ; preds = %51
  br label %54

54:                                               ; preds = %53
  %55 = load i32, ptr %7, align 4, !tbaa !9
  %56 = add nsw i32 %55, 1
  store i32 %56, ptr %7, align 4, !tbaa !9
  br label %29, !llvm.loop !13

57:                                               ; preds = %51, %29
  %58 = load i32, ptr %7, align 4, !tbaa !9
  %59 = add nsw i32 %58, 1
  %60 = load ptr, ptr %6, align 8, !tbaa !5
  store i32 %59, ptr %60, align 4, !tbaa !9
  %61 = load ptr, ptr %4, align 8, !tbaa !5
  store i32 1, ptr %11, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  ret ptr %61

62:                                               ; preds = %51
  unreachable
}

declare void @qsort(ptr noundef, i64 noundef, i64 noundef, ptr noundef) #2

attributes #0 = { 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 = { "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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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: nounwind uwtable
declare dso_local i32 @cmpi(ptr noundef, ptr noundef) #0

; Function Attrs: nofree nounwind uwtable
define dso_local noundef ptr @minSubsequence(ptr noundef returned %0, i32 noundef %1, ptr nocapture noundef writeonly %2) local_unnamed_addr #1 {
  %4 = icmp sgt i32 %1, 0
  br i1 %4, label %.lr.ph.preheader, label %._crit_edge.thread

._crit_edge.thread:                               ; preds = %3
  %5 = sext i32 %1 to i64
  tail call void @qsort(ptr noundef %0, i64 noundef %5, i64 noundef 4, ptr noundef nonnull @cmpi) #4
  br label %._crit_edge33

.lr.ph.preheader:                                 ; preds = %3
  %wide.trip.count = zext nneg i32 %1 to i64
  %min.iters.check = icmp ult i32 %1, 8
  br i1 %min.iters.check, label %.lr.ph.preheader50, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %wide.trip.count, 2147483640
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %8, %vector.body ]
  %vec.phi47 = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %9, %vector.body ]
  %6 = getelementptr inbounds i32, ptr %0, i64 %index
  %7 = getelementptr inbounds i8, ptr %6, i64 16
  %wide.load = load <4 x i32>, ptr %6, align 4, !tbaa !5
  %wide.load48 = load <4 x i32>, ptr %7, align 4, !tbaa !5
  %8 = add <4 x i32> %wide.load, %vec.phi
  %9 = add <4 x i32> %wide.load48, %vec.phi47
  %index.next = add nuw i64 %index, 8
  %10 = icmp eq i64 %index.next, %n.vec
  br i1 %10, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %bin.rdx = add <4 x i32> %9, %8
  %11 = tail call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> %bin.rdx)
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader50

.lr.ph.preheader50:                               ; preds = %middle.block, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %.02326.ph = phi i32 [ 0, %.lr.ph.preheader ], [ %11, %middle.block ]
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader50, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ %indvars.iv.ph, %.lr.ph.preheader50 ]
  %.02326 = phi i32 [ %14, %.lr.ph ], [ %.02326.ph, %.lr.ph.preheader50 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %12 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = add nsw i32 %13, %.02326
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %middle.block
  %.lcssa = phi i32 [ %11, %middle.block ], [ %14, %.lr.ph ]
  %15 = zext nneg i32 %1 to i64
  tail call void @qsort(ptr noundef nonnull %0, i64 noundef %15, i64 noundef 4, ptr noundef nonnull @cmpi) #4
  br i1 %4, label %.lr.ph32.preheader, label %._crit_edge33

.lr.ph32.preheader:                               ; preds = %._crit_edge
  %wide.trip.count41 = zext nneg i32 %1 to i64
  br label %.lr.ph32

.lr.ph32:                                         ; preds = %.lr.ph32.preheader, %21
  %indvars.iv38 = phi i64 [ 0, %.lr.ph32.preheader ], [ %indvars.iv.next39, %21 ]
  %.02229 = phi i32 [ 0, %.lr.ph32.preheader ], [ %19, %21 ]
  %.12428 = phi i32 [ %.lcssa, %.lr.ph32.preheader ], [ %18, %21 ]
  %16 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv38
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = sub nsw i32 %.12428, %17
  %19 = add nsw i32 %17, %.02229
  %20 = icmp sgt i32 %19, %18
  br i1 %20, label %._crit_edge33.loopexit.split.loop.exit, label %21

21:                                               ; preds = %.lr.ph32
  %indvars.iv.next39 = add nuw nsw i64 %indvars.iv38, 1
  %exitcond42.not = icmp eq i64 %indvars.iv.next39, %wide.trip.count41
  br i1 %exitcond42.not, label %._crit_edge33.loopexit, label %.lr.ph32, !llvm.loop !14

._crit_edge33.loopexit.split.loop.exit:           ; preds = %.lr.ph32
  %22 = trunc nuw nsw i64 %indvars.iv38 to i32
  br label %._crit_edge33.loopexit

._crit_edge33.loopexit:                           ; preds = %21, %._crit_edge33.loopexit.split.loop.exit
  %.1.lcssa.ph = phi i32 [ %22, %._crit_edge33.loopexit.split.loop.exit ], [ %1, %21 ]
  %23 = add nuw nsw i32 %.1.lcssa.ph, 1
  br label %._crit_edge33

._crit_edge33:                                    ; preds = %._crit_edge.thread, %._crit_edge33.loopexit, %._crit_edge
  %.1.lcssa = phi i32 [ 1, %._crit_edge ], [ %23, %._crit_edge33.loopexit ], [ 1, %._crit_edge.thread ]
  store i32 %.1.lcssa, ptr %2, align 4, !tbaa !5
  ret ptr %0
}

; Function Attrs: nofree
declare void @qsort(ptr noundef, i64 noundef, i64 noundef, ptr nocapture noundef) local_unnamed_addr #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.add.v4i32(<4 x i32>) #3

attributes #0 = { 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 = { nofree 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 #2 = { nofree "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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !12, !11}
!14 = distinct !{!14, !10}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass