; LLVM IR from pavlosdais/Abstract-Data-Types :: modules/PriorityQueue (pq)

; 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.pq = type { ptr, i64, i64, ptr, ptr }
%struct.node = type { 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 zeroext i1 @is_pq_empty(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local ptr @pq_remove(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = call zeroext i1 @is_pq_empty(ptr noundef %5)
  br i1 %6, label %7, label %8

7:                                                ; preds = %1
  store ptr null, ptr %2, align 8
  br label %37

8:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.pq, ptr %9, i32 0, i32 0
  %11 = load ptr, ptr %10, align 8, !tbaa !9
  %12 = getelementptr inbounds %struct.node, ptr %11, i64 0
  %13 = getelementptr inbounds %struct.node, ptr %12, i32 0, i32 0
  %14 = load ptr, ptr %13, align 8, !tbaa !12
  store ptr %14, ptr %4, align 8, !tbaa !5
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.pq, ptr %15, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !9
  %18 = getelementptr inbounds %struct.node, ptr %17, i64 0
  %19 = getelementptr inbounds %struct.node, ptr %18, i32 0, i32 0
  store ptr null, ptr %19, align 8, !tbaa !12
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.pq, ptr %20, i32 0, i32 1
  %22 = load i64, ptr %21, align 8, !tbaa !14
  %23 = add i64 %22, -1
  store i64 %23, ptr %21, align 8, !tbaa !14
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.pq, ptr %24, i32 0, i32 0
  %26 = load ptr, ptr %25, align 8, !tbaa !9
  %27 = getelementptr inbounds %struct.node, ptr %26, i64 0
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.pq, ptr %28, i32 0, i32 0
  %30 = load ptr, ptr %29, align 8, !tbaa !9
  %31 = load ptr, ptr %3, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.pq, ptr %31, i32 0, i32 1
  %33 = load i64, ptr %32, align 8, !tbaa !14
  %34 = getelementptr inbounds %struct.node, ptr %30, i64 %33
  call void @swap_nodes(ptr noundef %27, ptr noundef %34)
  %35 = load ptr, ptr %3, align 8, !tbaa !5
  call void @bubble_down(ptr noundef %35, i64 noundef 0)
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %36, ptr %2, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %37

37:                                               ; preds = %8, %7
  %38 = load ptr, ptr %2, align 8
  ret ptr %38
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @swap_nodes(ptr noundef, ptr noundef) #2

; Function Attrs: nounwind uwtable
declare hidden void @bubble_down(ptr noundef, i64 noundef) #1

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 = { inlinehint 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/C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"pq", !6, i64 0, !11, i64 8, !11, i64 16, !6, i64 24, !6, i64 32}
!11 = !{!"long", !7, i64 0}
!12 = !{!13, !6, i64 0}
!13 = !{!"node", !6, i64 0}
!14 = !{!10, !11, 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"

%struct.node = type { ptr }

; Function Attrs: nounwind uwtable
declare dso_local zeroext i1 @is_pq_empty(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local ptr @pq_remove(ptr noundef %0) local_unnamed_addr #0 {
  %2 = tail call zeroext i1 @is_pq_empty(ptr noundef %0)
  br i1 %2, label %10, label %3

3:                                                ; preds = %1
  %4 = load ptr, ptr %0, align 8, !tbaa !5
  %5 = load ptr, ptr %4, align 8, !tbaa !11
  store ptr null, ptr %4, align 8, !tbaa !11
  %6 = getelementptr inbounds i8, ptr %0, i64 8
  %7 = load i64, ptr %6, align 8, !tbaa !13
  %8 = add i64 %7, -1
  store i64 %8, ptr %6, align 8, !tbaa !13
  %9 = getelementptr inbounds %struct.node, ptr %4, i64 %8
  tail call void @swap_nodes(ptr noundef nonnull %4, ptr noundef nonnull %9)
  tail call void @bubble_down(ptr noundef nonnull %0, i64 noundef 0)
  br label %10

10:                                               ; preds = %1, %3
  %.0 = phi ptr [ %5, %3 ], [ null, %1 ]
  ret ptr %.0
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @swap_nodes(ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare hidden void @bubble_down(ptr noundef, i64 noundef) local_unnamed_addr #0

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" }
attributes #1 = { inlinehint 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, !7, i64 0}
!6 = !{!"pq", !7, i64 0, !10, i64 8, !10, i64 16, !7, i64 24, !7, i64 32}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!12, !7, i64 0}
!12 = !{!"node", !7, i64 0}
!13 = !{!6, !10, i64 8}


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