; LLVM IR from InnoFang/algo-set :: Data Structure/Sort/Heap Sort/main.ll (Z8heapSortRSt6vectorIiSaIiEE)

; 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 @_Z9shiftDownRSt6vectorIiSaIiEEmm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef, i64 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) #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #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 nounwind uwtable
define dso_local void @_Z8heapSortRSt6vectorIiSaIiEE(ptr noundef nonnull align 8 dereferenceable(24) %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %6) #3
  store i64 %7, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %8 = load i64, ptr %3, align 8, !tbaa !9
  %9 = udiv i64 %8, 2
  %10 = sub i64 %9, 1
  store i64 %10, ptr %4, align 8, !tbaa !9
  br label %11

11:                                               ; preds = %19, %1
  %12 = load i64, ptr %4, align 8, !tbaa !9
  %13 = icmp uge i64 %12, 0
  br i1 %13, label %15, label %14

14:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %22

15:                                               ; preds = %11
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = load i64, ptr %3, align 8, !tbaa !9
  %18 = load i64, ptr %4, align 8, !tbaa !9
  call void @_Z9shiftDownRSt6vectorIiSaIiEEmm(ptr noundef nonnull align 8 dereferenceable(24) %16, i64 noundef %17, i64 noundef %18)
  br label %19

19:                                               ; preds = %15
  %20 = load i64, ptr %4, align 8, !tbaa !9
  %21 = add i64 %20, -1
  store i64 %21, ptr %4, align 8, !tbaa !9
  br label %11, !llvm.loop !11

22:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %23 = load i64, ptr %3, align 8, !tbaa !9
  %24 = sub i64 %23, 1
  store i64 %24, ptr %5, align 8, !tbaa !9
  br label %25

25:                                               ; preds = %37, %22
  %26 = load i64, ptr %5, align 8, !tbaa !9
  %27 = icmp ugt i64 %26, 0
  br i1 %27, label %29, label %28

28:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %40

29:                                               ; preds = %25
  %30 = load ptr, ptr %2, align 8, !tbaa !5
  %31 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %30, i64 noundef 0) #3
  %32 = load ptr, ptr %2, align 8, !tbaa !5
  %33 = load i64, ptr %5, align 8, !tbaa !9
  %34 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %32, i64 noundef %33) #3
  call void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4) %31, ptr noundef nonnull align 4 dereferenceable(4) %34) #3
  %35 = load ptr, ptr %2, align 8, !tbaa !5
  %36 = load i64, ptr %5, align 8, !tbaa !9
  call void @_Z9shiftDownRSt6vectorIiSaIiEEmm(ptr noundef nonnull align 8 dereferenceable(24) %35, i64 noundef %36, i64 noundef 0)
  br label %37

37:                                               ; preds = %29
  %38 = load i64, ptr %5, align 8, !tbaa !9
  %39 = add i64 %38, -1
  store i64 %39, ptr %5, align 8, !tbaa !9
  br label %25, !llvm.loop !13

40:                                               ; preds = %28
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #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 = { 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", !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: mustprogress nounwind uwtable
declare dso_local void @_Z9shiftDownRSt6vectorIiSaIiEEmm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress noreturn nounwind uwtable
define dso_local void @_Z8heapSortRSt6vectorIiSaIiEE(ptr noundef nonnull align 8 dereferenceable(24) %0) local_unnamed_addr #1 {
  %2 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %3 = lshr i64 %2, 1
  br label %4

4:                                                ; preds = %4, %1
  %.014.in = phi i64 [ %3, %1 ], [ %.014, %4 ]
  %.014 = add i64 %.014.in, -1
  tail call void @_Z9shiftDownRSt6vectorIiSaIiEEmm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %2, i64 noundef %.014)
  br label %4, !llvm.loop !5
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) 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 = { mustprogress noreturn 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass