; LLVM IR from manishbisht/Competitive-Programming :: Algorithms/Sorting/heapSort.ll (Z8heapSortPii)

; 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"

%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; 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 uwtable
declare dso_local void @_Z11max_heapifyPiii(ptr noundef, i32 noundef, i32 noundef) #2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z8heapSortPii(ptr noundef %0, i32 noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  %8 = load i32, ptr %4, align 4, !tbaa !9
  %9 = sdiv i32 %8, 2
  %10 = sub nsw i32 %9, 1
  store i32 %10, ptr %5, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %19, %2
  %12 = load i32, ptr %5, align 4, !tbaa !9
  %13 = icmp sge i32 %12, 0
  br i1 %13, label %15, label %14

14:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  br label %22

15:                                               ; preds = %11
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = load i32, ptr %4, align 4, !tbaa !9
  %18 = load i32, ptr %5, align 4, !tbaa !9
  call void @_Z11max_heapifyPiii(ptr noundef %16, i32 noundef %17, i32 noundef %18)
  br label %19

19:                                               ; preds = %15
  %20 = load i32, ptr %5, align 4, !tbaa !9
  %21 = add nsw i32 %20, -1
  store i32 %21, ptr %5, align 4, !tbaa !9
  br label %11, !llvm.loop !11

22:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  %23 = load i32, ptr %4, align 4, !tbaa !9
  %24 = sub nsw i32 %23, 1
  store i32 %24, ptr %6, align 4, !tbaa !9
  br label %25

25:                                               ; preds = %38, %22
  %26 = load i32, ptr %6, align 4, !tbaa !9
  %27 = icmp sge i32 %26, 0
  br i1 %27, label %29, label %28

28:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  br label %41

29:                                               ; preds = %25
  %30 = load ptr, ptr %3, align 8, !tbaa !5
  %31 = getelementptr inbounds i32, ptr %30, i64 0
  %32 = load ptr, ptr %3, align 8, !tbaa !5
  %33 = load i32, ptr %6, align 4, !tbaa !9
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds i32, ptr %32, i64 %34
  call void @_Z4swapPiS_(ptr noundef %31, ptr noundef %35)
  %36 = load ptr, ptr %3, align 8, !tbaa !5
  %37 = load i32, ptr %6, align 4, !tbaa !9
  call void @_Z11max_heapifyPiii(ptr noundef %36, i32 noundef %37, i32 noundef 0)
  br label %38

38:                                               ; preds = %29
  %39 = load i32, ptr %6, align 4, !tbaa !9
  %40 = add nsw i32 %39, -1
  store i32 %40, ptr %6, align 4, !tbaa !9
  br label %25, !llvm.loop !13

41:                                               ; preds = %28
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %42

42:                                               ; preds = %55, %41
  %43 = load i32, ptr %7, align 4, !tbaa !9
  %44 = load i32, ptr %4, align 4, !tbaa !9
  %45 = icmp slt i32 %43, %44
  br i1 %45, label %47, label %46

46:                                               ; preds = %42
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  br label %58

47:                                               ; preds = %42
  %48 = load ptr, ptr %3, align 8, !tbaa !5
  %49 = load i32, ptr %7, align 4, !tbaa !9
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds i32, ptr %48, i64 %50
  %52 = load i32, ptr %51, align 4, !tbaa !9
  %53 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %52)
  %54 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %53, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  br label %55

55:                                               ; preds = %47
  %56 = load i32, ptr %7, align 4, !tbaa !9
  %57 = add nsw i32 %56, 1
  store i32 %57, ptr %7, align 4, !tbaa !9
  br label %42, !llvm.loop !14

58:                                               ; preds = %46
  unreachable
}

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #3

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #4

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 = { 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 #3 = { "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 #4 = { inlinehint 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 #5 = { 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"}
!13 = distinct !{!13, !12}
!14 = distinct !{!14, !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"

%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z4swapPiS_(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z11max_heapifyPiii(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress noreturn uwtable
define dso_local noundef i32 @_Z8heapSortPii(ptr noundef %0, i32 noundef %1) local_unnamed_addr #2 {
  %3 = icmp sgt i32 %1, 1
  br i1 %3, label %.lr.ph.preheader, label %.preheader20

.lr.ph.preheader:                                 ; preds = %2
  %4 = lshr i32 %1, 1
  br label %.lr.ph

.preheader20:                                     ; preds = %.lr.ph, %2
  %5 = icmp sgt i32 %1, 0
  br i1 %5, label %.lr.ph23.preheader, label %.preheader

.lr.ph23.preheader:                               ; preds = %.preheader20
  %6 = zext nneg i32 %1 to i64
  br label %.lr.ph23

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.019.in21 = phi i32 [ %.019, %.lr.ph ], [ %4, %.lr.ph.preheader ]
  %.019 = add nsw i32 %.019.in21, -1
  tail call void @_Z11max_heapifyPiii(ptr noundef %0, i32 noundef %1, i32 noundef %.019)
  %7 = icmp ugt i32 %.019.in21, 1
  br i1 %7, label %.lr.ph, label %.preheader20, !llvm.loop !5

.preheader:                                       ; preds = %.lr.ph23, %.preheader20
  %8 = sext i32 %1 to i64
  br label %12

.lr.ph23:                                         ; preds = %.lr.ph23.preheader, %.lr.ph23
  %indvars.iv = phi i64 [ %6, %.lr.ph23.preheader ], [ %indvars.iv.next, %.lr.ph23 ]
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %9 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  tail call void @_Z4swapPiS_(ptr noundef %0, ptr noundef %9)
  %10 = trunc nuw nsw i64 %indvars.iv.next to i32
  tail call void @_Z11max_heapifyPiii(ptr noundef %0, i32 noundef %10, i32 noundef 0)
  %11 = icmp ugt i64 %indvars.iv, 1
  br i1 %11, label %.lr.ph23, label %.preheader, !llvm.loop !7

12:                                               ; preds = %.preheader, %12
  %indvars.iv25 = phi i64 [ 0, %.preheader ], [ %indvars.iv.next26, %12 ]
  %13 = icmp slt i64 %indvars.iv25, %8
  tail call void @llvm.assume(i1 %13)
  %14 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv25
  %15 = load i32, ptr %14, align 4, !tbaa !8
  %16 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %15)
  %17 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %16, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  %indvars.iv.next26 = add nuw nsw i64 %indvars.iv25, 1
  br label %12, !llvm.loop !12
}

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #3

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: write)
declare void @llvm.assume(i1 noundef) #5

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 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 = { mustprogress noreturn 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 = { "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 #4 = { inlinehint 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 #5 = { nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: write) }

!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"}
!7 = distinct !{!7, !6}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !10, i64 0}
!10 = !{!"omnipotent char", !11, i64 0}
!11 = !{!"Simple C++ TBAA"}
!12 = distinct !{!12, !6}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass