; LLVM IR from yourtion/LearningMasteringAlgorithms-C :: source (graph)

; 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.Graph_ = type { i32, i32, ptr, ptr, %struct.List_ }
%struct.List_ = type { i32, ptr, ptr, ptr, ptr }
%struct.AdjList_ = type { ptr, %struct.List_ }

; Function Attrs: nounwind uwtable
define dso_local void @graph_destroy(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #5
  br label %4

4:                                                ; preds = %31, %1
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.Graph_, ptr %5, i32 0, i32 4
  %7 = getelementptr inbounds %struct.List_, ptr %6, i32 0, i32 0
  %8 = load i32, ptr %7, align 8, !tbaa !9
  %9 = icmp sgt i32 %8, 0
  br i1 %9, label %10, label %32

10:                                               ; preds = %4
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.Graph_, ptr %11, i32 0, i32 4
  %13 = call i32 @list_rem_next(ptr noundef %12, ptr noundef null, ptr noundef %3)
  %14 = icmp eq i32 %13, 0
  br i1 %14, label %15, label %31

15:                                               ; preds = %10
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.AdjList_, ptr %16, i32 0, i32 1
  call void @list_destroy(ptr noundef %17)
  %18 = load ptr, ptr %2, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.Graph_, ptr %18, i32 0, i32 3
  %20 = load ptr, ptr %19, align 8, !tbaa !13
  %21 = icmp ne ptr %20, null
  br i1 %21, label %22, label %29

22:                                               ; preds = %15
  %23 = load ptr, ptr %2, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.Graph_, ptr %23, i32 0, i32 3
  %25 = load ptr, ptr %24, align 8, !tbaa !13
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.AdjList_, ptr %26, i32 0, i32 0
  %28 = load ptr, ptr %27, align 8, !tbaa !14
  call void %25(ptr noundef %28)
  br label %29

29:                                               ; preds = %22, %15
  %30 = load ptr, ptr %3, align 8, !tbaa !5
  call void @free(ptr noundef %30) #5
  br label %31

31:                                               ; preds = %29, %10
  br label %4, !llvm.loop !16

32:                                               ; preds = %4
  %33 = load ptr, ptr %2, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.Graph_, ptr %33, i32 0, i32 4
  call void @list_destroy(ptr noundef %34)
  %35 = load ptr, ptr %2, align 8, !tbaa !5
  call void @llvm.memset.p0.i64(ptr align 8 %35, i8 0, i64 64, i1 false)
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #5
  ret void
}

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

declare i32 @list_rem_next(ptr noundef, ptr noundef, ptr noundef) #2

declare void @list_destroy(ptr noundef) #2

; Function Attrs: nounwind
declare void @free(ptr noundef) #3

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

; 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 = { "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 "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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #5 = { 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/C++ TBAA"}
!9 = !{!10, !11, i64 24}
!10 = !{!"Graph_", !11, i64 0, !11, i64 4, !6, i64 8, !6, i64 16, !12, i64 24}
!11 = !{!"int", !7, i64 0}
!12 = !{!"List_", !11, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32}
!13 = !{!10, !6, i64 16}
!14 = !{!15, !6, i64 0}
!15 = !{!"AdjList_", !6, i64 0, !12, i64 8}
!16 = distinct !{!16, !17}
!17 = !{!"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: nounwind uwtable
define dso_local void @graph_destroy(ptr noundef %0) local_unnamed_addr #0 {
  %2 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #5
  %3 = getelementptr inbounds i8, ptr %0, i64 24
  %4 = load i32, ptr %3, align 8, !tbaa !5
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1
  %6 = getelementptr inbounds i8, ptr %0, i64 16
  br label %7

7:                                                ; preds = %.lr.ph, %19
  %8 = call i32 @list_rem_next(ptr noundef nonnull %3, ptr noundef null, ptr noundef nonnull %2) #5
  %9 = icmp eq i32 %8, 0
  br i1 %9, label %10, label %19

10:                                               ; preds = %7
  %11 = load ptr, ptr %2, align 8, !tbaa !12
  %12 = getelementptr inbounds i8, ptr %11, i64 8
  call void @list_destroy(ptr noundef nonnull %12) #5
  %13 = load ptr, ptr %6, align 8, !tbaa !13
  %.not = icmp eq ptr %13, null
  br i1 %.not, label %17, label %14

14:                                               ; preds = %10
  %15 = load ptr, ptr %2, align 8, !tbaa !12
  %16 = load ptr, ptr %15, align 8, !tbaa !14
  call void %13(ptr noundef %16) #5
  br label %17

17:                                               ; preds = %14, %10
  %18 = load ptr, ptr %2, align 8, !tbaa !12
  call void @free(ptr noundef %18) #5
  br label %19

19:                                               ; preds = %17, %7
  %20 = load i32, ptr %3, align 8, !tbaa !5
  %21 = icmp sgt i32 %20, 0
  br i1 %21, label %7, label %._crit_edge, !llvm.loop !16

._crit_edge:                                      ; preds = %19, %1
  call void @list_destroy(ptr noundef nonnull %3) #5
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(64) %0, i8 0, i64 64, i1 false)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #5
  ret void
}

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

declare i32 @list_rem_next(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #2

declare void @list_destroy(ptr noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #3

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

; Function Attrs: mustprogress 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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 willreturn allockind("free") memory(argmem: readwrite, 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 #4 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #5 = { 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, !7, i64 24}
!6 = !{!"Graph_", !7, i64 0, !7, i64 4, !10, i64 8, !10, i64 16, !11, i64 24}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!"List_", !7, i64 0, !10, i64 8, !10, i64 16, !10, i64 24, !10, i64 32}
!12 = !{!10, !10, i64 0}
!13 = !{!6, !10, i64 16}
!14 = !{!15, !10, i64 0}
!15 = !{!"AdjList_", !10, i64 0, !11, i64 8}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}


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