; LLVM IR from VAR-solutions/Algorithms :: Selection Algorithms/Quick_Select/cpp/quick_select.ll (Z10partition_Pxxxx)

; 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 noundef i64 @_Z10partition_Pxxxx(ptr noundef %0, i64 noundef %1, i64 noundef %2, i64 noundef %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !9
  store i64 %3, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  store i64 0, ptr %10, align 8, !tbaa !9
  store i64 0, ptr %9, align 8, !tbaa !9
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = load i64, ptr %9, align 8, !tbaa !9
  %13 = getelementptr inbounds i64, ptr %11, i64 %12
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = load i64, ptr %8, align 8, !tbaa !9
  %16 = getelementptr inbounds i64, ptr %14, i64 %15
  call void @_ZSt4swapIxENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 8 dereferenceable(8) %13, ptr noundef nonnull align 8 dereferenceable(8) %16) #3
  store i64 0, ptr %8, align 8, !tbaa !9
  br label %17

17:                                               ; preds = %39, %4
  %18 = load i64, ptr %10, align 8, !tbaa !9
  %19 = load i64, ptr %7, align 8, !tbaa !9
  %20 = icmp sle i64 %18, %19
  br i1 %20, label %21, label %42

21:                                               ; preds = %17
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = load i64, ptr %10, align 8, !tbaa !9
  %24 = getelementptr inbounds i64, ptr %22, i64 %23
  %25 = load i64, ptr %24, align 8, !tbaa !9
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  %27 = load i64, ptr %8, align 8, !tbaa !9
  %28 = getelementptr inbounds i64, ptr %26, i64 %27
  %29 = load i64, ptr %28, align 8, !tbaa !9
  %30 = icmp slt i64 %25, %29
  br i1 %30, label %31, label %39

31:                                               ; preds = %21
  %32 = load ptr, ptr %5, align 8, !tbaa !5
  %33 = load i64, ptr %9, align 8, !tbaa !9
  %34 = add nsw i64 %33, 1
  store i64 %34, ptr %9, align 8, !tbaa !9
  %35 = getelementptr inbounds i64, ptr %32, i64 %34
  %36 = load ptr, ptr %5, align 8, !tbaa !5
  %37 = load i64, ptr %10, align 8, !tbaa !9
  %38 = getelementptr inbounds i64, ptr %36, i64 %37
  call void @_ZSt4swapIxENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 8 dereferenceable(8) %35, ptr noundef nonnull align 8 dereferenceable(8) %38) #3
  br label %39

39:                                               ; preds = %31, %21
  %40 = load i64, ptr %10, align 8, !tbaa !9
  %41 = add nsw i64 %40, 1
  store i64 %41, ptr %10, align 8, !tbaa !9
  br label %17, !llvm.loop !11

42:                                               ; preds = %17
  %43 = load ptr, ptr %5, align 8, !tbaa !5
  %44 = load i64, ptr %9, align 8, !tbaa !9
  %45 = getelementptr inbounds i64, ptr %43, i64 %44
  %46 = load ptr, ptr %5, align 8, !tbaa !5
  %47 = load i64, ptr %8, align 8, !tbaa !9
  %48 = getelementptr inbounds i64, ptr %46, i64 %47
  call void @_ZSt4swapIxENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 8 dereferenceable(8) %45, ptr noundef nonnull align 8 dereferenceable(8) %48) #3
  %49 = load i64, ptr %9, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  ret i64 %49
}

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIxENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #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 = { inlinehint 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 = !{!"long long", !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
define dso_local noundef i64 @_Z10partition_Pxxxx(ptr noundef nonnull %0, i64 noundef %1, i64 noundef %2, i64 noundef %3) local_unnamed_addr #0 {
  %5 = getelementptr inbounds i64, ptr %0, i64 %3
  tail call void @_ZSt4swapIxENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef nonnull align 8 dereferenceable(8) %5) #2
  %.not20 = icmp slt i64 %2, 0
  br i1 %.not20, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %4, %13
  %.022 = phi i64 [ %14, %13 ], [ 0, %4 ]
  %.01921 = phi i64 [ %.1, %13 ], [ 0, %4 ]
  %6 = getelementptr inbounds i64, ptr %0, i64 %.022
  %7 = load i64, ptr %6, align 8, !tbaa !5
  %8 = load i64, ptr %0, align 8, !tbaa !5
  %9 = icmp slt i64 %7, %8
  br i1 %9, label %10, label %13

10:                                               ; preds = %.lr.ph
  %11 = add nsw i64 %.01921, 1
  %12 = getelementptr inbounds i64, ptr %0, i64 %11
  tail call void @_ZSt4swapIxENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 8 dereferenceable(8) %12, ptr noundef nonnull align 8 dereferenceable(8) %6) #2
  br label %13

13:                                               ; preds = %10, %.lr.ph
  %.1 = phi i64 [ %11, %10 ], [ %.01921, %.lr.ph ]
  %14 = add nuw i64 %.022, 1
  %exitcond.not = icmp eq i64 %.022, %2
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %13, %4
  %.019.lcssa = phi i64 [ 0, %4 ], [ %.1, %13 ]
  %15 = getelementptr inbounds i64, ptr %0, i64 %.019.lcssa
  tail call void @_ZSt4swapIxENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 8 dereferenceable(8) %15, ptr noundef nonnull align 8 dereferenceable(8) %0) #2
  ret i64 %.019.lcssa
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIxENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) 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 = { inlinehint 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 = !{!"long long", !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,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass