; LLVM IR from lekkas/c-algorithms :: src/algos (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 { ptr, ptr, i32, i32, i8 }
%struct.Edgenode = type { i32, i32, ptr }

; 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: nounwind uwtable
define dso_local void @deleteGraph(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.Graph, ptr %6, i32 0, i32 1
  %8 = load ptr, ptr %7, align 8, !tbaa !9
  call void @free(ptr noundef %8) #3
  store i32 0, ptr %3, align 4, !tbaa !13
  br label %9

9:                                                ; preds = %33, %1
  %10 = load i32, ptr %3, align 4, !tbaa !13
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.Graph, ptr %11, i32 0, i32 2
  %13 = load i32, ptr %12, align 8, !tbaa !14
  %14 = icmp sle i32 %10, %13
  br i1 %14, label %15, label %36

15:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.Graph, ptr %16, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8, !tbaa !15
  %19 = load i32, ptr %3, align 4, !tbaa !13
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds ptr, ptr %18, i64 %20
  %22 = load ptr, ptr %21, align 8, !tbaa !5
  store ptr %22, ptr %4, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %26, %15
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = icmp ne ptr %24, null
  br i1 %25, label %26, label %32

26:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.Edgenode, ptr %27, i32 0, i32 2
  %29 = load ptr, ptr %28, align 8, !tbaa !16
  store ptr %29, ptr %5, align 8, !tbaa !5
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  call void @free(ptr noundef %30) #3
  %31 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %31, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %23, !llvm.loop !18

32:                                               ; preds = %23
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %33

33:                                               ; preds = %32
  %34 = load i32, ptr %3, align 4, !tbaa !13
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %3, align 4, !tbaa !13
  br label %9, !llvm.loop !20

36:                                               ; preds = %9
  %37 = load ptr, ptr %2, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.Graph, ptr %37, i32 0, i32 0
  %39 = load ptr, ptr %38, align 8, !tbaa !15
  call void @free(ptr noundef %39) #3
  %40 = load ptr, ptr %2, align 8, !tbaa !5
  call void @free(ptr noundef %40) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  ret void
}

; Function Attrs: nounwind
declare void @free(ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #3 = { 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, !6, i64 8}
!10 = !{!"Graph", !6, i64 0, !6, i64 8, !11, i64 16, !11, i64 20, !12, i64 24}
!11 = !{!"int", !7, i64 0}
!12 = !{!"_Bool", !7, i64 0}
!13 = !{!11, !11, i64 0}
!14 = !{!10, !11, i64 16}
!15 = !{!10, !6, i64 0}
!16 = !{!17, !6, i64 8}
!17 = !{!"Edgenode", !11, i64 0, !11, i64 4, !6, i64 8}
!18 = distinct !{!18, !19}
!19 = !{!"llvm.loop.mustprogress"}
!20 = distinct !{!20, !19}


; 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 @deleteGraph(ptr nocapture noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  tail call void @free(ptr noundef %3) #2
  %4 = getelementptr inbounds i8, ptr %0, i64 16
  %5 = load i32, ptr %4, align 8, !tbaa !12
  %.not15 = icmp slt i32 %5, 0
  br i1 %.not15, label %._crit_edge19, label %.lr.ph18

.lr.ph18:                                         ; preds = %1, %._crit_edge
  %6 = phi i32 [ %12, %._crit_edge ], [ %5, %1 ]
  %indvars.iv = phi i64 [ %indvars.iv.next, %._crit_edge ], [ 0, %1 ]
  %7 = load ptr, ptr %0, align 8, !tbaa !13
  %8 = getelementptr inbounds ptr, ptr %7, i64 %indvars.iv
  %9 = load ptr, ptr %8, align 8, !tbaa !14
  %.not1213 = icmp eq ptr %9, null
  br i1 %.not1213, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph18, %.lr.ph
  %.01114 = phi ptr [ %11, %.lr.ph ], [ %9, %.lr.ph18 ]
  %10 = getelementptr inbounds i8, ptr %.01114, i64 8
  %11 = load ptr, ptr %10, align 8, !tbaa !15
  tail call void @free(ptr noundef nonnull %.01114) #2
  %.not12 = icmp eq ptr %11, null
  br i1 %.not12, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !17

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %.pre = load i32, ptr %4, align 8, !tbaa !12
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %.lr.ph18
  %12 = phi i32 [ %.pre, %._crit_edge.loopexit ], [ %6, %.lr.ph18 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %13 = sext i32 %12 to i64
  %.not.not = icmp slt i64 %indvars.iv, %13
  br i1 %.not.not, label %.lr.ph18, label %._crit_edge19, !llvm.loop !19

._crit_edge19:                                    ; preds = %._crit_edge, %1
  %14 = load ptr, ptr %0, align 8, !tbaa !13
  tail call void @free(ptr noundef %14) #2
  tail call void @free(ptr noundef nonnull %0) #2
  ret void
}

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #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 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 #2 = { 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 8}
!6 = !{!"Graph", !7, i64 0, !7, i64 8, !10, i64 16, !10, i64 20, !11, i64 24}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!"_Bool", !8, i64 0}
!12 = !{!6, !10, i64 16}
!13 = !{!6, !7, i64 0}
!14 = !{!7, !7, i64 0}
!15 = !{!16, !7, i64 8}
!16 = !{!"Edgenode", !10, i64 0, !10, i64 4, !7, i64 8}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.mustprogress"}
!19 = distinct !{!19, !18}


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