; LLVM IR from Ayon-SSP/The-SDE-Prep :: 1]_Data Structures/2]_Linked List/Linked List Problems (Polynomialadditon)

; 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, i32, ptr }

; Function Attrs: nounwind uwtable
define dso_local ptr @create(ptr noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = icmp eq ptr %9, null
  br i1 %10, label %11, label %22

11:                                               ; preds = %3
  %12 = call noalias ptr @malloc(i64 noundef 16) #4
  store ptr %12, ptr %7, align 8, !tbaa !5
  %13 = load i32, ptr %5, align 4, !tbaa !9
  %14 = load ptr, ptr %7, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.node, ptr %14, i32 0, i32 0
  store i32 %13, ptr %15, align 8, !tbaa !11
  %16 = load i32, ptr %6, align 4, !tbaa !9
  %17 = load ptr, ptr %7, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.node, ptr %17, i32 0, i32 1
  store i32 %16, ptr %18, align 4, !tbaa !13
  %19 = load ptr, ptr %7, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.node, ptr %19, i32 0, i32 2
  store ptr null, ptr %20, align 8, !tbaa !14
  %21 = load ptr, ptr %7, align 8, !tbaa !5
  store ptr %21, ptr %4, align 8, !tbaa !5
  br label %46

22:                                               ; preds = %3
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %23, ptr %7, align 8, !tbaa !5
  br label %24

24:                                               ; preds = %29, %22
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.node, ptr %25, i32 0, i32 2
  %27 = load ptr, ptr %26, align 8, !tbaa !14
  %28 = icmp ne ptr %27, null
  br i1 %28, label %29, label %33

29:                                               ; preds = %24
  %30 = load ptr, ptr %7, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.node, ptr %30, i32 0, i32 2
  %32 = load ptr, ptr %31, align 8, !tbaa !14
  store ptr %32, ptr %7, align 8, !tbaa !5
  br label %24, !llvm.loop !15

33:                                               ; preds = %24
  %34 = call noalias ptr @malloc(i64 noundef 16) #4
  store ptr %34, ptr %8, align 8, !tbaa !5
  %35 = load i32, ptr %5, align 4, !tbaa !9
  %36 = load ptr, ptr %8, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.node, ptr %36, i32 0, i32 0
  store i32 %35, ptr %37, align 8, !tbaa !11
  %38 = load i32, ptr %6, align 4, !tbaa !9
  %39 = load ptr, ptr %8, align 8, !tbaa !5
  %40 = getelementptr inbounds %struct.node, ptr %39, i32 0, i32 1
  store i32 %38, ptr %40, align 4, !tbaa !13
  %41 = load ptr, ptr %8, align 8, !tbaa !5
  %42 = getelementptr inbounds %struct.node, ptr %41, i32 0, i32 2
  store ptr null, ptr %42, align 8, !tbaa !14
  %43 = load ptr, ptr %8, align 8, !tbaa !5
  %44 = load ptr, ptr %7, align 8, !tbaa !5
  %45 = getelementptr inbounds %struct.node, ptr %44, i32 0, i32 2
  store ptr %43, ptr %45, align 8, !tbaa !14
  br label %46

46:                                               ; preds = %33, %11
  %47 = load ptr, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret ptr %47
}

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

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

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

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"node", !10, i64 0, !10, i64 4, !6, i64 8}
!13 = !{!12, !10, i64 4}
!14 = !{!12, !6, i64 8}
!15 = distinct !{!15, !16}
!16 = !{!"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"

; Function Attrs: nofree nounwind uwtable
define dso_local noundef ptr @create(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq ptr %0, null
  br i1 %4, label %5, label %.preheader

5:                                                ; preds = %3
  %6 = tail call noalias dereferenceable_or_null(16) ptr @malloc(i64 noundef 16) #2
  store i32 %1, ptr %6, align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %6, i64 4
  store i32 %2, ptr %7, align 4, !tbaa !11
  %8 = getelementptr inbounds i8, ptr %6, i64 8
  store ptr null, ptr %8, align 8, !tbaa !12
  br label %16

.preheader:                                       ; preds = %3, %.preheader
  %.017 = phi ptr [ %10, %.preheader ], [ %0, %3 ]
  %9 = getelementptr inbounds i8, ptr %.017, i64 8
  %10 = load ptr, ptr %9, align 8, !tbaa !12
  %.not = icmp eq ptr %10, null
  br i1 %.not, label %11, label %.preheader, !llvm.loop !13

11:                                               ; preds = %.preheader
  %12 = getelementptr inbounds i8, ptr %.017, i64 8
  %13 = tail call noalias dereferenceable_or_null(16) ptr @malloc(i64 noundef 16) #2
  store i32 %1, ptr %13, align 8, !tbaa !5
  %14 = getelementptr inbounds i8, ptr %13, i64 4
  store i32 %2, ptr %14, align 4, !tbaa !11
  %15 = getelementptr inbounds i8, ptr %13, i64 8
  store ptr null, ptr %15, align 8, !tbaa !12
  store ptr %13, ptr %12, align 8, !tbaa !12
  br label %16

16:                                               ; preds = %11, %5
  %.0 = phi ptr [ %6, %5 ], [ %0, %11 ]
  ret ptr %.0
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

attributes #0 = { nofree 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 = { 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 #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 = !{!"node", !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 = !{!6, !7, i64 4}
!12 = !{!6, !10, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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