; LLVM IR from Py-Contributors/AlgorithmsAndDataStructure :: C++/Data Structure/Linked List/Menu_Driven_Linked_List.ll (Z7del_valPP4Nodei)

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

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str.1 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [10 x i8], align 1

; 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: mustprogress uwtable
declare dso_local noundef i32 @_Z7del_begPP4Node(ptr noundef) #1

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #2

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) #3

; Function Attrs: mustprogress uwtable
define dso_local void @_Z7del_valPP4Nodei(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = load ptr, ptr %7, align 8, !tbaa !5
  %9 = icmp eq ptr %8, null
  br i1 %9, label %10, label %12

10:                                               ; preds = %2
  %11 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.1)
  br label %62

12:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = load ptr, ptr %13, align 8, !tbaa !5
  store ptr %14, ptr %6, align 8, !tbaa !5
  br label %15

15:                                               ; preds = %30, %12
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.Node, ptr %16, i32 0, i32 1
  %18 = load ptr, ptr %17, align 8, !tbaa !11
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = load ptr, ptr %19, align 8, !tbaa !5
  %21 = icmp ne ptr %18, %20
  br i1 %21, label %22, label %28

22:                                               ; preds = %15
  %23 = load ptr, ptr %6, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.Node, ptr %23, i32 0, i32 0
  %25 = load i32, ptr %24, align 8, !tbaa !13
  %26 = load i32, ptr %4, align 4, !tbaa !9
  %27 = icmp ne i32 %25, %26
  br label %28

28:                                               ; preds = %22, %15
  %29 = phi i1 [ false, %15 ], [ %27, %22 ]
  br i1 %29, label %30, label %35

30:                                               ; preds = %28
  %31 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %31, ptr %5, align 8, !tbaa !5
  %32 = load ptr, ptr %6, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.Node, ptr %32, i32 0, i32 1
  %34 = load ptr, ptr %33, align 8, !tbaa !11
  store ptr %34, ptr %6, align 8, !tbaa !5
  br label %15, !llvm.loop !14

35:                                               ; preds = %28
  %36 = load ptr, ptr %6, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.Node, ptr %36, i32 0, i32 0
  %38 = load i32, ptr %37, align 8, !tbaa !13
  %39 = load i32, ptr %4, align 4, !tbaa !9
  %40 = icmp ne i32 %38, %39
  br i1 %40, label %41, label %43

41:                                               ; preds = %35
  %42 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.2)
  br label %61

43:                                               ; preds = %35
  %44 = load ptr, ptr %6, align 8, !tbaa !5
  %45 = load ptr, ptr %3, align 8, !tbaa !5
  %46 = load ptr, ptr %45, align 8, !tbaa !5
  %47 = icmp eq ptr %44, %46
  br i1 %47, label %48, label %50

48:                                               ; preds = %43
  %49 = call noundef i32 @_Z7del_begPP4Node(ptr noundef %6)
  br label %60

50:                                               ; preds = %43
  %51 = load ptr, ptr %6, align 8, !tbaa !5
  %52 = getelementptr inbounds %struct.Node, ptr %51, i32 0, i32 1
  %53 = load ptr, ptr %52, align 8, !tbaa !11
  %54 = load ptr, ptr %5, align 8, !tbaa !5
  %55 = getelementptr inbounds %struct.Node, ptr %54, i32 0, i32 1
  store ptr %53, ptr %55, align 8, !tbaa !11
  %56 = load ptr, ptr %6, align 8, !tbaa !5
  %57 = icmp eq ptr %56, null
  br i1 %57, label %59, label %58

58:                                               ; preds = %50
  call void @_ZdlPvm(ptr noundef %56, i64 noundef 24) #5
  br label %59

59:                                               ; preds = %58, %50
  br label %60

60:                                               ; preds = %59, %48
  br label %61

61:                                               ; preds = %60, %41
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %62

62:                                               ; preds = %61, %10
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #3 = { nobuiltin nounwind "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 = { nounwind }
attributes #5 = { builtin 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 = !{!12, !6, i64 8}
!12 = !{!"_ZTS4Node", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!12, !10, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; 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
@.str.1 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [10 x i8], align 1

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

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z7del_begPP4Node(ptr noundef) local_unnamed_addr #1

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #2

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) local_unnamed_addr #3

; Function Attrs: mustprogress uwtable
define dso_local void @_Z7del_valPP4Nodei(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = alloca ptr, align 8
  %4 = load ptr, ptr %0, align 8, !tbaa !5
  %5 = icmp eq ptr %4, null
  br i1 %5, label %6, label %8

6:                                                ; preds = %2
  %7 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str.1)
  br label %26

8:                                                ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %9 = getelementptr inbounds i8, ptr %4, i64 8
  %10 = load ptr, ptr %9, align 8, !tbaa !9
  %.not12 = icmp eq ptr %10, %4
  br i1 %.not12, label %.critedge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %8
  %11 = load i32, ptr %4, align 8, !tbaa !12
  %.not923 = icmp eq i32 %11, %1
  br i1 %.not923, label %.critedge, label %.lr.ph25, !llvm.loop !13

.lr.ph25:                                         ; preds = %.lr.ph.preheader, %.lr.ph
  %storemerge1324 = phi ptr [ %12, %.lr.ph ], [ %4, %.lr.ph.preheader ]
  %12 = phi ptr [ %14, %.lr.ph ], [ %10, %.lr.ph.preheader ]
  %13 = getelementptr inbounds i8, ptr %12, i64 8
  %14 = load ptr, ptr %13, align 8, !tbaa !9
  %.not = icmp eq ptr %14, %4
  br i1 %.not, label %.critedge, label %.lr.ph, !llvm.loop !13

.lr.ph:                                           ; preds = %.lr.ph25
  %15 = load i32, ptr %12, align 8, !tbaa !12
  %.not9 = icmp eq i32 %15, %1
  br i1 %.not9, label %.critedge, label %.lr.ph25, !llvm.loop !13

.critedge:                                        ; preds = %.lr.ph25, %.lr.ph, %.lr.ph.preheader, %8
  %storemerge.lcssa11 = phi ptr [ %4, %8 ], [ %4, %.lr.ph.preheader ], [ %12, %.lr.ph ], [ %12, %.lr.ph25 ]
  %.0.lcssa = phi ptr [ undef, %8 ], [ undef, %.lr.ph.preheader ], [ %storemerge1324, %.lr.ph ], [ %storemerge1324, %.lr.ph25 ]
  %.lcssa = phi ptr [ %10, %8 ], [ %10, %.lr.ph.preheader ], [ %14, %.lr.ph ], [ %14, %.lr.ph25 ]
  store ptr %storemerge.lcssa11, ptr %3, align 8, !tbaa !5
  %16 = load i32, ptr %storemerge.lcssa11, align 8, !tbaa !12
  %.not10 = icmp eq i32 %16, %1
  br i1 %.not10, label %19, label %17

17:                                               ; preds = %.critedge
  %18 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str.2)
  br label %25

19:                                               ; preds = %.critedge
  %20 = icmp eq ptr %storemerge.lcssa11, %4
  br i1 %20, label %21, label %23

21:                                               ; preds = %19
  %22 = call noundef i32 @_Z7del_begPP4Node(ptr noundef nonnull %3)
  br label %25

23:                                               ; preds = %19
  %24 = getelementptr inbounds i8, ptr %.0.lcssa, i64 8
  store ptr %.lcssa, ptr %24, align 8, !tbaa !9
  tail call void @_ZdlPvm(ptr noundef nonnull %storemerge.lcssa11, i64 noundef 24) #5
  br label %25

25:                                               ; preds = %21, %23, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  br label %26

26:                                               ; preds = %25, %6
  ret void
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #3 = { nobuiltin nounwind "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 = { nounwind }
attributes #5 = { builtin 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, !6, i64 8}
!10 = !{!"_ZTS4Node", !11, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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