; LLVM IR from Mohammed-Shoaib/Coding-Problems :: HackerRank/Algorithms/Easy/E0064.ll (Z11quickSelectRSt6vectorIiSaIiEEiii)

; 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 uwtable
declare dso_local noundef i32 @_Z9partitionRSt6vectorIiSaIiEEii(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef, i32 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: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

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

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z11quickSelectRSt6vectorIiSaIiEEiii(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #0 {
  %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 %6, align 8, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !9
  store i32 %2, ptr %8, align 4, !tbaa !9
  store i32 %3, ptr %9, align 4, !tbaa !9
  %12 = load i32, ptr %7, align 4, !tbaa !9
  %13 = load i32, ptr %8, align 4, !tbaa !9
  %14 = icmp eq i32 %12, %13
  br i1 %14, label %15, label %21

15:                                               ; preds = %4
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = load i32, ptr %7, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %16, i64 noundef %18) #3
  %20 = load i32, ptr %19, align 4, !tbaa !9
  store i32 %20, ptr %5, align 4
  br label %54

21:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = load i32, ptr %7, align 4, !tbaa !9
  %24 = load i32, ptr %8, align 4, !tbaa !9
  %25 = call noundef i32 @_Z9partitionRSt6vectorIiSaIiEEii(ptr noundef nonnull align 8 dereferenceable(24) %22, i32 noundef %23, i32 noundef %24)
  store i32 %25, ptr %10, align 4, !tbaa !9
  %26 = load i32, ptr %10, align 4, !tbaa !9
  %27 = load i32, ptr %9, align 4, !tbaa !9
  %28 = icmp eq i32 %26, %27
  br i1 %28, label %29, label %35

29:                                               ; preds = %21
  %30 = load ptr, ptr %6, align 8, !tbaa !5
  %31 = load i32, ptr %10, align 4, !tbaa !9
  %32 = sext i32 %31 to i64
  %33 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %30, i64 noundef %32) #3
  %34 = load i32, ptr %33, align 4, !tbaa !9
  store i32 %34, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %53

35:                                               ; preds = %21
  %36 = load i32, ptr %9, align 4, !tbaa !9
  %37 = load i32, ptr %10, align 4, !tbaa !9
  %38 = icmp slt i32 %36, %37
  br i1 %38, label %39, label %46

39:                                               ; preds = %35
  %40 = load ptr, ptr %6, align 8, !tbaa !5
  %41 = load i32, ptr %7, align 4, !tbaa !9
  %42 = load i32, ptr %10, align 4, !tbaa !9
  %43 = sub nsw i32 %42, 1
  %44 = load i32, ptr %9, align 4, !tbaa !9
  %45 = call noundef i32 @_Z11quickSelectRSt6vectorIiSaIiEEiii(ptr noundef nonnull align 8 dereferenceable(24) %40, i32 noundef %41, i32 noundef %43, i32 noundef %44)
  store i32 %45, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %53

46:                                               ; preds = %35
  %47 = load ptr, ptr %6, align 8, !tbaa !5
  %48 = load i32, ptr %10, align 4, !tbaa !9
  %49 = add nsw i32 %48, 1
  %50 = load i32, ptr %8, align 4, !tbaa !9
  %51 = load i32, ptr %9, align 4, !tbaa !9
  %52 = call noundef i32 @_Z11quickSelectRSt6vectorIiSaIiEEiii(ptr noundef nonnull align 8 dereferenceable(24) %47, i32 noundef %49, i32 noundef %50, i32 noundef %51)
  store i32 %52, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %53

53:                                               ; preds = %46, %39, %29
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  br label %54

54:                                               ; preds = %53, %15
  %55 = load i32, ptr %5, align 4
  ret i32 %55
}

attributes #0 = { mustprogress 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 = { 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 #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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}


; 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 uwtable
declare dso_local noundef i32 @_Z9partitionRSt6vectorIiSaIiEEii(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef, i32 noundef) local_unnamed_addr #0

; 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 #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z11quickSelectRSt6vectorIiSaIiEEiii(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = icmp eq i32 %1, %2
  br i1 %5, label %tailrecurse.outer._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %4, %tailrecurse.outer
  %.tr28.ph37 = phi i32 [ %.tr2834, %tailrecurse.outer ], [ %2, %4 ]
  %.tr27.ph36 = phi i32 [ %13, %tailrecurse.outer ], [ %1, %4 ]
  br label %6

6:                                                ; preds = %.lr.ph, %tailrecurse
  %.tr2834 = phi i32 [ %.tr28.ph37, %.lr.ph ], [ %11, %tailrecurse ]
  %7 = tail call noundef i32 @_Z9partitionRSt6vectorIiSaIiEEii(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %.tr27.ph36, i32 noundef %.tr2834)
  %8 = icmp eq i32 %7, %3
  br i1 %8, label %tailrecurse.outer._crit_edge, label %9

9:                                                ; preds = %6
  %10 = icmp sgt i32 %7, %3
  br i1 %10, label %tailrecurse, label %tailrecurse.outer

tailrecurse:                                      ; preds = %9
  %11 = add nsw i32 %7, -1
  %12 = icmp eq i32 %.tr27.ph36, %11
  br i1 %12, label %tailrecurse.outer._crit_edge, label %6

tailrecurse.outer:                                ; preds = %9
  %13 = add nsw i32 %7, 1
  %14 = icmp eq i32 %13, %.tr2834
  br i1 %14, label %tailrecurse.outer._crit_edge, label %.lr.ph

tailrecurse.outer._crit_edge:                     ; preds = %tailrecurse.outer, %6, %tailrecurse, %4
  %.sink54 = phi i32 [ %1, %4 ], [ %.tr27.ph36, %tailrecurse ], [ %3, %6 ], [ %.tr2834, %tailrecurse.outer ]
  %15 = sext i32 %.sink54 to i64
  %16 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %15) #2
  %.1 = load i32, ptr %16, align 4, !tbaa !5
  ret i32 %.1
}

attributes #0 = { mustprogress 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 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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