; LLVM IR from UtkarshPathrabe/Competitive-Coding :: Model Algorithms/Arrays/Given an array A[] and a number x, check for pair in A[] wi_ff9809db (Z9partitionRSt6vectorIiSaIiEEii)

; 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
declare dso_local void @_Z4swapPiS_(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: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z9partitionRSt6vectorIiSaIiEEii(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = sub nsw i32 %10, 1
  store i32 %11, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = load i32, ptr %6, align 4, !tbaa !9
  %14 = sext i32 %13 to i64
  %15 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %12, i64 noundef %14) #2
  %16 = load i32, ptr %15, align 4, !tbaa !9
  store i32 %16, ptr %9, align 4, !tbaa !9
  %17 = load i32, ptr %5, align 4, !tbaa !9
  store i32 %17, ptr %8, align 4, !tbaa !9
  br label %18

18:                                               ; preds = %41, %3
  %19 = load i32, ptr %8, align 4, !tbaa !9
  %20 = load i32, ptr %6, align 4, !tbaa !9
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %22, label %44

22:                                               ; preds = %18
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = load i32, ptr %8, align 4, !tbaa !9
  %25 = sext i32 %24 to i64
  %26 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %23, i64 noundef %25) #2
  %27 = load i32, ptr %26, align 4, !tbaa !9
  %28 = load i32, ptr %9, align 4, !tbaa !9
  %29 = icmp slt i32 %27, %28
  br i1 %29, label %30, label %40

30:                                               ; preds = %22
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = load i32, ptr %7, align 4, !tbaa !9
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %7, align 4, !tbaa !9
  %34 = sext i32 %33 to i64
  %35 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %31, i64 noundef %34) #2
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  %37 = load i32, ptr %8, align 4, !tbaa !9
  %38 = sext i32 %37 to i64
  %39 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %36, i64 noundef %38) #2
  call void @_Z4swapPiS_(ptr noundef %35, ptr noundef %39)
  br label %40

40:                                               ; preds = %30, %22
  br label %41

41:                                               ; preds = %40
  %42 = load i32, ptr %8, align 4, !tbaa !9
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %8, align 4, !tbaa !9
  br label %18, !llvm.loop !11

44:                                               ; preds = %18
  %45 = load ptr, ptr %4, align 8, !tbaa !5
  %46 = load i32, ptr %7, align 4, !tbaa !9
  %47 = add nsw i32 %46, 1
  store i32 %47, ptr %7, align 4, !tbaa !9
  %48 = sext i32 %47 to i64
  %49 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %45, i64 noundef %48) #2
  %50 = load ptr, ptr %4, align 8, !tbaa !5
  %51 = load i32, ptr %6, align 4, !tbaa !9
  %52 = sext i32 %51 to i64
  %53 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %50, i64 noundef %52) #2
  call void @_Z4swapPiS_(ptr noundef %49, ptr noundef %53)
  %54 = load i32, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i32 %54
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

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 }

!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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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
declare dso_local void @_Z4swapPiS_(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef range(i32 -2147483647, -2147483648) i32 @_Z9partitionRSt6vectorIiSaIiEEii(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = sext i32 %2 to i64
  %5 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %4) #1
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = icmp slt i32 %1, %2
  br i1 %7, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %8 = add nsw i32 %1, -1
  %9 = sext i32 %1 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %18
  %indvars.iv = phi i64 [ %9, %.lr.ph.preheader ], [ %indvars.iv.next, %18 ]
  %.020 = phi i32 [ %8, %.lr.ph.preheader ], [ %.1, %18 ]
  %10 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %indvars.iv) #1
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = icmp slt i32 %11, %6
  br i1 %12, label %13, label %18

13:                                               ; preds = %.lr.ph
  %14 = add nsw i32 %.020, 1
  %15 = sext i32 %14 to i64
  %16 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %15) #1
  %17 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %indvars.iv) #1
  tail call void @_Z4swapPiS_(ptr noundef nonnull %16, ptr noundef nonnull %17)
  br label %18

18:                                               ; preds = %.lr.ph, %13
  %.1 = phi i32 [ %14, %13 ], [ %.020, %.lr.ph ]
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond.not = icmp eq i32 %lftr.wideiv, %2
  br i1 %exitcond.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !9

._crit_edge.loopexit:                             ; preds = %18
  %19 = add nsw i32 %.1, 1
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %3
  %.0.lcssa = phi i32 [ %1, %3 ], [ %19, %._crit_edge.loopexit ]
  %20 = sext i32 %.0.lcssa to i64
  %21 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %20) #1
  %22 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %4) #1
  tail call void @_Z4swapPiS_(ptr noundef nonnull %21, ptr noundef nonnull %22)
  ret i32 %.0.lcssa
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

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 }

!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++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass