; LLVM IR from devparthgarg/Data-Structures-and-Algorithms :: 11. Linked List/40 Merge Two Sorted LL (40 Merge Two Sorted LL)

; 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.Node = type { i32, ptr }

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_Z5mergeRP4NodeS1_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) unnamed_addr #3 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) #4

; 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 @_Z5printP4Node(ptr noundef) #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #5 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #6
  %6 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #7
  invoke void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %6, i32 noundef 10)
          to label %7 unwind label %50

7:                                                ; preds = %0
  store ptr %6, ptr %2, align 8, !tbaa !5
  %8 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #7
  invoke void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %8, i32 noundef 20)
          to label %9 unwind label %54

9:                                                ; preds = %7
  %10 = load ptr, ptr %2, align 8, !tbaa !5
  %11 = getelementptr inbounds %class.Node, ptr %10, i32 0, i32 1
  store ptr %8, ptr %11, align 8, !tbaa !9
  %12 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #7
  invoke void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %12, i32 noundef 30)
          to label %13 unwind label %58

13:                                               ; preds = %9
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = getelementptr inbounds %class.Node, ptr %14, i32 0, i32 1
  %16 = load ptr, ptr %15, align 8, !tbaa !9
  %17 = getelementptr inbounds %class.Node, ptr %16, i32 0, i32 1
  store ptr %12, ptr %17, align 8, !tbaa !9
  %18 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #7
  invoke void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %18, i32 noundef 40)
          to label %19 unwind label %62

19:                                               ; preds = %13
  %20 = load ptr, ptr %2, align 8, !tbaa !5
  %21 = getelementptr inbounds %class.Node, ptr %20, i32 0, i32 1
  %22 = load ptr, ptr %21, align 8, !tbaa !9
  %23 = getelementptr inbounds %class.Node, ptr %22, i32 0, i32 1
  %24 = load ptr, ptr %23, align 8, !tbaa !9
  %25 = getelementptr inbounds %class.Node, ptr %24, i32 0, i32 1
  store ptr %18, ptr %25, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #6
  %26 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #7
  invoke void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %26, i32 noundef 5)
          to label %27 unwind label %66

27:                                               ; preds = %19
  store ptr %26, ptr %5, align 8, !tbaa !5
  %28 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #7
  invoke void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %28, i32 noundef 15)
          to label %29 unwind label %70

29:                                               ; preds = %27
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = getelementptr inbounds %class.Node, ptr %30, i32 0, i32 1
  store ptr %28, ptr %31, align 8, !tbaa !9
  %32 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #7
  invoke void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %32, i32 noundef 25)
          to label %33 unwind label %74

33:                                               ; preds = %29
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = getelementptr inbounds %class.Node, ptr %34, i32 0, i32 1
  %36 = load ptr, ptr %35, align 8, !tbaa !9
  %37 = getelementptr inbounds %class.Node, ptr %36, i32 0, i32 1
  store ptr %32, ptr %37, align 8, !tbaa !9
  %38 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #7
  invoke void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %38, i32 noundef 35)
          to label %39 unwind label %78

39:                                               ; preds = %33
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  %41 = getelementptr inbounds %class.Node, ptr %40, i32 0, i32 1
  %42 = load ptr, ptr %41, align 8, !tbaa !9
  %43 = getelementptr inbounds %class.Node, ptr %42, i32 0, i32 1
  %44 = load ptr, ptr %43, align 8, !tbaa !9
  %45 = getelementptr inbounds %class.Node, ptr %44, i32 0, i32 1
  store ptr %38, ptr %45, align 8, !tbaa !9
  %46 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_Z5printP4Node(ptr noundef %46)
  %47 = load ptr, ptr %5, align 8, !tbaa !5
  call void @_Z5printP4Node(ptr noundef %47)
  %48 = call noundef ptr @_Z5mergeRP4NodeS1_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %5)
  store ptr %48, ptr %2, align 8, !tbaa !5
  %49 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_Z5printP4Node(ptr noundef %49)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #6
  ret i32 0

50:                                               ; preds = %0
  %51 = landingpad { ptr, i32 }
          cleanup
  %52 = extractvalue { ptr, i32 } %51, 0
  store ptr %52, ptr %3, align 8
  %53 = extractvalue { ptr, i32 } %51, 1
  store i32 %53, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %6, i64 noundef 16) #8
  br label %83

54:                                               ; preds = %7
  %55 = landingpad { ptr, i32 }
          cleanup
  %56 = extractvalue { ptr, i32 } %55, 0
  store ptr %56, ptr %3, align 8
  %57 = extractvalue { ptr, i32 } %55, 1
  store i32 %57, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %8, i64 noundef 16) #8
  br label %83

58:                                               ; preds = %9
  %59 = landingpad { ptr, i32 }
          cleanup
  %60 = extractvalue { ptr, i32 } %59, 0
  store ptr %60, ptr %3, align 8
  %61 = extractvalue { ptr, i32 } %59, 1
  store i32 %61, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %12, i64 noundef 16) #8
  br label %83

62:                                               ; preds = %13
  %63 = landingpad { ptr, i32 }
          cleanup
  %64 = extractvalue { ptr, i32 } %63, 0
  store ptr %64, ptr %3, align 8
  %65 = extractvalue { ptr, i32 } %63, 1
  store i32 %65, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %18, i64 noundef 16) #8
  br label %83

66:                                               ; preds = %19
  %67 = landingpad { ptr, i32 }
          cleanup
  %68 = extractvalue { ptr, i32 } %67, 0
  store ptr %68, ptr %3, align 8
  %69 = extractvalue { ptr, i32 } %67, 1
  store i32 %69, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %26, i64 noundef 16) #8
  br label %82

70:                                               ; preds = %27
  %71 = landingpad { ptr, i32 }
          cleanup
  %72 = extractvalue { ptr, i32 } %71, 0
  store ptr %72, ptr %3, align 8
  %73 = extractvalue { ptr, i32 } %71, 1
  store i32 %73, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %28, i64 noundef 16) #8
  br label %82

74:                                               ; preds = %29
  %75 = landingpad { ptr, i32 }
          cleanup
  %76 = extractvalue { ptr, i32 } %75, 0
  store ptr %76, ptr %3, align 8
  %77 = extractvalue { ptr, i32 } %75, 1
  store i32 %77, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %32, i64 noundef 16) #8
  br label %82

78:                                               ; preds = %33
  %79 = landingpad { ptr, i32 }
          cleanup
  %80 = extractvalue { ptr, i32 } %79, 0
  store ptr %80, ptr %3, align 8
  %81 = extractvalue { ptr, i32 } %79, 1
  store i32 %81, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %38, i64 noundef 16) #8
  br label %82

82:                                               ; preds = %78, %74, %70, %66
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #6
  br label %83

83:                                               ; preds = %82, %62, %58, %54, %50
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #6
  br label %84

84:                                               ; preds = %83
  %85 = load ptr, ptr %3, align 8
  %86 = load i32, ptr %4, align 4
  %87 = insertvalue { ptr, i32 } poison, ptr %85, 0
  %88 = insertvalue { ptr, i32 } %87, i32 %86, 1
  resume { ptr, i32 } %88
}

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nobuiltin 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 #3 = { 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 #4 = { 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 #5 = { mustprogress norecurse 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 #6 = { nounwind }
attributes #7 = { builtin allocsize(0) }
attributes #8 = { 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}
!11 = !{!"int", !7, i64 0}


; 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 uwtable
declare dso_local noundef ptr @_Z5mergeRP4NodeS1_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) unnamed_addr #3 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress 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 @_Z5printP4Node(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #4 personality ptr @__gxx_personality_v0 {
  %1 = alloca ptr, align 8
  %2 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #5
  %3 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #6
  tail call void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %3, i32 noundef 10)
  store ptr %3, ptr %1, align 8, !tbaa !5
  %4 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #6
  tail call void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %4, i32 noundef 20)
  %5 = getelementptr inbounds i8, ptr %3, i64 8
  store ptr %4, ptr %5, align 8, !tbaa !9
  %6 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #6
  tail call void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %6, i32 noundef 30)
  %7 = load ptr, ptr %5, align 8, !tbaa !9
  %8 = getelementptr inbounds i8, ptr %7, i64 8
  store ptr %6, ptr %8, align 8, !tbaa !9
  %9 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #6
  tail call void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %9, i32 noundef 40)
  %10 = load ptr, ptr %5, align 8, !tbaa !9
  %11 = getelementptr inbounds i8, ptr %10, i64 8
  %12 = load ptr, ptr %11, align 8, !tbaa !9
  %13 = getelementptr inbounds i8, ptr %12, i64 8
  store ptr %9, ptr %13, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #5
  %14 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #6
  tail call void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %14, i32 noundef 5)
  store ptr %14, ptr %2, align 8, !tbaa !5
  %15 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #6
  tail call void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %15, i32 noundef 15)
  %16 = getelementptr inbounds i8, ptr %14, i64 8
  store ptr %15, ptr %16, align 8, !tbaa !9
  %17 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #6
  tail call void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %17, i32 noundef 25)
  %18 = load ptr, ptr %16, align 8, !tbaa !9
  %19 = getelementptr inbounds i8, ptr %18, i64 8
  store ptr %17, ptr %19, align 8, !tbaa !9
  %20 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #6
  tail call void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %20, i32 noundef 35)
  %21 = load ptr, ptr %16, align 8, !tbaa !9
  %22 = getelementptr inbounds i8, ptr %21, i64 8
  %23 = load ptr, ptr %22, align 8, !tbaa !9
  %24 = getelementptr inbounds i8, ptr %23, i64 8
  store ptr %20, ptr %24, align 8, !tbaa !9
  tail call void @_Z5printP4Node(ptr noundef nonnull %3)
  tail call void @_Z5printP4Node(ptr noundef nonnull %14)
  %25 = call noundef ptr @_Z5mergeRP4NodeS1_(ptr noundef nonnull align 8 dereferenceable(8) %1, ptr noundef nonnull align 8 dereferenceable(8) %2)
  store ptr %25, ptr %1, align 8, !tbaa !5
  call void @_Z5printP4Node(ptr noundef %25)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #5
  ret i32 0
}

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nobuiltin 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 #3 = { 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 #4 = { mustprogress norecurse 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 }
attributes #6 = { builtin 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, !6, i64 8}
!10 = !{!"_ZTS4Node", !11, i64 0, !6, i64 8}
!11 = !{!"int", !7, i64 0}


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