; LLVM IR from HarshCasper/NeoAlgo :: C/ds (maxHeap)

; 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"

%struct.heap = type { i32, i32, ptr }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare dso_local void @swap(ptr noundef, i32 noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @upHeapify(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = 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) #2
  %6 = load i32, ptr %4, align 4, !tbaa !9
  %7 = sub nsw i32 %6, 1
  %8 = sdiv i32 %7, 2
  store i32 %8, ptr %5, align 4, !tbaa !9
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.heap, ptr %9, i32 0, i32 2
  %11 = load ptr, ptr %10, align 8, !tbaa !11
  %12 = load i32, ptr %5, align 4, !tbaa !9
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds i32, ptr %11, i64 %13
  %15 = load i32, ptr %14, align 4, !tbaa !9
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.heap, ptr %16, i32 0, i32 2
  %18 = load ptr, ptr %17, align 8, !tbaa !11
  %19 = load i32, ptr %4, align 4, !tbaa !9
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds i32, ptr %18, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !9
  %23 = icmp slt i32 %15, %22
  br i1 %23, label %24, label %32

24:                                               ; preds = %2
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.heap, ptr %25, i32 0, i32 2
  %27 = load ptr, ptr %26, align 8, !tbaa !11
  %28 = load i32, ptr %5, align 4, !tbaa !9
  %29 = load i32, ptr %4, align 4, !tbaa !9
  call void @swap(ptr noundef %27, i32 noundef %28, i32 noundef %29)
  %30 = load ptr, ptr %3, align 8, !tbaa !5
  %31 = load i32, ptr %5, align 4, !tbaa !9
  call void @upHeapify(ptr noundef %30, i32 noundef %31)
  br label %32

32:                                               ; preds = %24, %2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 8}
!12 = !{!"heap", !10, i64 0, !10, i64 4, !6, i64 8}


; 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: nounwind uwtable
declare dso_local void @swap(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @upHeapify(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = add nsw i32 %1, -1
  %5 = sdiv i32 %4, 2
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = sext i32 %5 to i64
  %8 = getelementptr inbounds i32, ptr %6, i64 %7
  %9 = load i32, ptr %8, align 4, !tbaa !11
  %10 = sext i32 %1 to i64
  %11 = getelementptr inbounds i32, ptr %6, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !11
  %13 = icmp slt i32 %9, %12
  br i1 %13, label %tailrecurse, label %tailrecurse._crit_edge

tailrecurse:                                      ; preds = %2, %tailrecurse
  %14 = phi ptr [ %18, %tailrecurse ], [ %6, %2 ]
  %15 = phi i32 [ %17, %tailrecurse ], [ %5, %2 ]
  %.tr910 = phi i32 [ %15, %tailrecurse ], [ %1, %2 ]
  tail call void @swap(ptr noundef nonnull %14, i32 noundef %15, i32 noundef %.tr910)
  %16 = add nsw i32 %15, -1
  %17 = sdiv i32 %16, 2
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = sext i32 %17 to i64
  %20 = getelementptr inbounds i32, ptr %18, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !11
  %22 = sext i32 %15 to i64
  %23 = getelementptr inbounds i32, ptr %18, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !11
  %25 = icmp slt i32 %21, %24
  br i1 %25, label %tailrecurse, label %tailrecurse._crit_edge

tailrecurse._crit_edge:                           ; preds = %tailrecurse, %2
  ret void
}

attributes #0 = { 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" }

!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, !10, i64 8}
!6 = !{!"heap", !7, i64 0, !7, i64 4, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!7, !7, i64 0}


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