; LLVM IR from AnneLivia/Competitive-Programming :: Data Structures/Queue/Dynamic Queue (Implemented With Struct) (dynamic_queue)

; 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.Node = type { i32, ptr }
%struct.Descriptor = type { ptr, ptr, i32 }

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

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #1

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

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z4pushP10Descriptori(ptr noundef %0, i32 noundef %1) #2 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %10, label %46

10:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %11 = call noalias ptr @malloc(i64 noundef 16) #4
  store ptr %11, ptr %6, align 8, !tbaa !5
  %12 = load ptr, ptr %6, align 8, !tbaa !5
  %13 = icmp ne ptr %12, null
  br i1 %13, label %14, label %42

14:                                               ; preds = %10
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.Node, ptr %16, i32 0, i32 0
  store i32 %15, ptr %17, align 8, !tbaa !11
  %18 = load ptr, ptr %6, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.Node, ptr %18, i32 0, i32 1
  store ptr null, ptr %19, align 8, !tbaa !13
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.Descriptor, ptr %20, i32 0, i32 0
  %22 = load ptr, ptr %21, align 8, !tbaa !14
  %23 = icmp eq ptr %22, null
  br i1 %23, label %24, label %28

24:                                               ; preds = %14
  %25 = load ptr, ptr %6, align 8, !tbaa !5
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.Descriptor, ptr %26, i32 0, i32 0
  store ptr %25, ptr %27, align 8, !tbaa !14
  br label %34

28:                                               ; preds = %14
  %29 = load ptr, ptr %6, align 8, !tbaa !5
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.Descriptor, ptr %30, i32 0, i32 1
  %32 = load ptr, ptr %31, align 8, !tbaa !16
  %33 = getelementptr inbounds %struct.Node, ptr %32, i32 0, i32 1
  store ptr %29, ptr %33, align 8, !tbaa !13
  br label %34

34:                                               ; preds = %28, %24
  %35 = load ptr, ptr %6, align 8, !tbaa !5
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.Descriptor, ptr %36, i32 0, i32 1
  store ptr %35, ptr %37, align 8, !tbaa !16
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  %39 = getelementptr inbounds %struct.Descriptor, ptr %38, i32 0, i32 2
  %40 = load i32, ptr %39, align 8, !tbaa !17
  %41 = add nsw i32 %40, 1
  store i32 %41, ptr %39, align 8, !tbaa !17
  store i32 1, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %43

42:                                               ; preds = %10
  store i32 0, ptr %7, align 4
  br label %43

43:                                               ; preds = %42, %34
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %44 = load i32, ptr %7, align 4
  switch i32 %44, label %49 [
    i32 0, label %45
    i32 1, label %47
  ]

45:                                               ; preds = %43
  br label %46

46:                                               ; preds = %45, %2
  store i32 0, ptr %3, align 4
  br label %47

47:                                               ; preds = %46, %43
  %48 = load i32, ptr %3, align 4
  ret i32 %48

49:                                               ; preds = %43
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind allocsize(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 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 }
attributes #4 = { nounwind allocsize(0) }

!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 = !{!12, !10, i64 0}
!12 = !{!"_ZTS4Node", !10, i64 0, !6, i64 8}
!13 = !{!12, !6, i64 8}
!14 = !{!15, !6, i64 0}
!15 = !{!"_ZTS10Descriptor", !6, i64 0, !6, i64 8, !10, i64 16}
!16 = !{!15, !6, i64 8}
!17 = !{!15, !10, i64 16}


; 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 nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind willreturn memory(write, argmem: readwrite, inaccessiblemem: readwrite) uwtable
define dso_local noundef range(i32 0, 2) i32 @_Z4pushP10Descriptori(ptr noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %.thread, label %3

3:                                                ; preds = %2
  %4 = tail call noalias dereferenceable_or_null(16) ptr @malloc(i64 noundef 16) #2
  %.not17.not = icmp eq ptr %4, null
  br i1 %.not17.not, label %.thread, label %5

5:                                                ; preds = %3
  store i32 %1, ptr %4, align 8, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %4, i64 8
  store ptr null, ptr %6, align 8, !tbaa !11
  %7 = load ptr, ptr %0, align 8, !tbaa !12
  %8 = icmp eq ptr %7, null
  br i1 %8, label %13, label %9

9:                                                ; preds = %5
  %10 = getelementptr inbounds i8, ptr %0, i64 8
  %11 = load ptr, ptr %10, align 8, !tbaa !14
  %12 = getelementptr inbounds i8, ptr %11, i64 8
  br label %13

13:                                               ; preds = %5, %9
  %.sink = phi ptr [ %12, %9 ], [ %0, %5 ]
  store ptr %4, ptr %.sink, align 8, !tbaa !15
  %14 = getelementptr inbounds i8, ptr %0, i64 8
  store ptr %4, ptr %14, align 8, !tbaa !14
  %15 = getelementptr inbounds i8, ptr %0, i64 16
  %16 = load i32, ptr %15, align 8, !tbaa !16
  %17 = add nsw i32 %16, 1
  store i32 %17, ptr %15, align 8, !tbaa !16
  br label %.thread

.thread:                                          ; preds = %3, %2, %13
  %.1 = phi i32 [ 1, %13 ], [ 0, %2 ], [ 0, %3 ]
  ret i32 %.1
}

attributes #0 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 nofree nounwind willreturn memory(write, argmem: readwrite, inaccessiblemem: readwrite) 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 allocsize(0) }

!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 = !{!"_ZTS4Node", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!13, !10, i64 0}
!13 = !{!"_ZTS10Descriptor", !10, i64 0, !10, i64 8, !7, i64 16}
!14 = !{!13, !10, i64 8}
!15 = !{!10, !10, i64 0}
!16 = !{!13, !7, i64 16}


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