; LLVM IR from zhemao/libds :: list (list_add)

; 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.linked_node = type { ptr, ptr, ptr }
%struct.list = type { i32, ptr, ptr, ptr }

; 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: nounwind uwtable
define dso_local void @list_add(ptr noundef %0, ptr noundef %1, i32 noundef %2) #2 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %8 = call noalias ptr @malloc(i64 noundef 24) #5
  store ptr %8, ptr %7, align 8, !tbaa !5
  %9 = load i32, ptr %6, align 4, !tbaa !9
  %10 = sext i32 %9 to i64
  %11 = call noalias ptr @malloc(i64 noundef %10) #5
  %12 = load ptr, ptr %7, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.linked_node, ptr %12, i32 0, i32 0
  store ptr %11, ptr %13, align 8, !tbaa !11
  %14 = load ptr, ptr %7, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.linked_node, ptr %14, i32 0, i32 0
  %16 = load ptr, ptr %15, align 8, !tbaa !11
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = load i32, ptr %6, align 4, !tbaa !9
  %19 = sext i32 %18 to i64
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %16, ptr align 1 %17, i64 %19, i1 false)
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.list, ptr %20, i32 0, i32 1
  %22 = load ptr, ptr %21, align 8, !tbaa !13
  %23 = icmp eq ptr %22, null
  br i1 %23, label %24, label %35

24:                                               ; preds = %3
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.linked_node, ptr %25, i32 0, i32 2
  store ptr null, ptr %26, align 8, !tbaa !15
  %27 = load ptr, ptr %7, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.linked_node, ptr %27, i32 0, i32 1
  store ptr null, ptr %28, align 8, !tbaa !16
  %29 = load ptr, ptr %7, align 8, !tbaa !5
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.list, ptr %30, i32 0, i32 1
  store ptr %29, ptr %31, align 8, !tbaa !13
  %32 = load ptr, ptr %7, align 8, !tbaa !5
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.list, ptr %33, i32 0, i32 2
  store ptr %32, ptr %34, align 8, !tbaa !17
  br label %51

35:                                               ; preds = %3
  %36 = load ptr, ptr %7, align 8, !tbaa !5
  %37 = load ptr, ptr %4, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.list, ptr %37, i32 0, i32 2
  %39 = load ptr, ptr %38, align 8, !tbaa !17
  %40 = getelementptr inbounds %struct.linked_node, ptr %39, i32 0, i32 1
  store ptr %36, ptr %40, align 8, !tbaa !16
  %41 = load ptr, ptr %4, align 8, !tbaa !5
  %42 = getelementptr inbounds %struct.list, ptr %41, i32 0, i32 2
  %43 = load ptr, ptr %42, align 8, !tbaa !17
  %44 = load ptr, ptr %7, align 8, !tbaa !5
  %45 = getelementptr inbounds %struct.linked_node, ptr %44, i32 0, i32 2
  store ptr %43, ptr %45, align 8, !tbaa !15
  %46 = load ptr, ptr %7, align 8, !tbaa !5
  %47 = getelementptr inbounds %struct.linked_node, ptr %46, i32 0, i32 1
  store ptr null, ptr %47, align 8, !tbaa !16
  %48 = load ptr, ptr %7, align 8, !tbaa !5
  %49 = load ptr, ptr %4, align 8, !tbaa !5
  %50 = getelementptr inbounds %struct.list, ptr %49, i32 0, i32 2
  store ptr %48, ptr %50, align 8, !tbaa !17
  br label %51

51:                                               ; preds = %35, %24
  %52 = load ptr, ptr %4, align 8, !tbaa !5
  %53 = getelementptr inbounds %struct.list, ptr %52, i32 0, i32 0
  %54 = load i32, ptr %53, align 8, !tbaa !18
  %55 = add nsw i32 %54, 1
  store i32 %55, ptr %53, align 8, !tbaa !18
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

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 = { 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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { nounwind }
attributes #5 = { 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, !6, i64 0}
!12 = !{!"linked_node", !6, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!14, !6, i64 8}
!14 = !{!"list", !10, i64 0, !6, i64 8, !6, i64 16, !6, i64 24}
!15 = !{!12, !6, i64 16}
!16 = !{!12, !6, i64 8}
!17 = !{!14, !6, i64 16}
!18 = !{!14, !10, 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 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 uwtable
define dso_local void @list_add(ptr nocapture noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #1 {
  %4 = tail call noalias dereferenceable_or_null(24) ptr @malloc(i64 noundef 24) #4
  %5 = sext i32 %2 to i64
  %6 = tail call noalias ptr @malloc(i64 noundef %5) #4
  store ptr %6, ptr %4, align 8, !tbaa !5
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %6, ptr align 1 %1, i64 %5, i1 false)
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  %8 = load ptr, ptr %7, align 8, !tbaa !10
  %9 = icmp eq ptr %8, null
  br i1 %9, label %10, label %13

10:                                               ; preds = %3
  %11 = getelementptr inbounds i8, ptr %4, i64 8
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %11, i8 0, i64 16, i1 false)
  store ptr %4, ptr %7, align 8, !tbaa !10
  %12 = getelementptr inbounds i8, ptr %0, i64 16
  br label %19

13:                                               ; preds = %3
  %14 = getelementptr inbounds i8, ptr %0, i64 16
  %15 = load ptr, ptr %14, align 8, !tbaa !13
  %16 = getelementptr inbounds i8, ptr %15, i64 8
  store ptr %4, ptr %16, align 8, !tbaa !14
  %17 = getelementptr inbounds i8, ptr %4, i64 16
  store ptr %15, ptr %17, align 8, !tbaa !15
  %18 = getelementptr inbounds i8, ptr %4, i64 8
  store ptr null, ptr %18, align 8, !tbaa !14
  br label %19

19:                                               ; preds = %13, %10
  %.sink = phi ptr [ %14, %13 ], [ %12, %10 ]
  store ptr %4, ptr %.sink, align 8, !tbaa !13
  %20 = load i32, ptr %0, align 8, !tbaa !16
  %21 = add nsw i32 %20, 1
  store i32 %21, ptr %0, align 8, !tbaa !16
  ret void
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

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 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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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, !7, i64 0}
!6 = !{!"linked_node", !7, i64 0, !7, i64 8, !7, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!11, !7, i64 8}
!11 = !{!"list", !12, i64 0, !7, i64 8, !7, i64 16, !7, i64 24}
!12 = !{!"int", !8, i64 0}
!13 = !{!11, !7, i64 16}
!14 = !{!6, !7, i64 8}
!15 = !{!6, !7, i64 16}
!16 = !{!11, !12, i64 0}


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