; LLVM IR from VAR-solutions/Algorithms :: Sorting/Topological Sorting/C (topological_sorting)

; 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.Time = type { i32, i32 }

; Function Attrs: nounwind uwtable
declare dso_local void @addedge(ptr noundef, i32 noundef, i32 noundef) #0

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

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

; Function Attrs: nounwind uwtable
declare dso_local void @TS(ptr noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca [10 x ptr], align 16
  %3 = alloca [10 x %struct.Time], align 16
  %4 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 80, ptr %2) #2
  call void @llvm.lifetime.start.p0(i64 80, ptr %3) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %13, %0
  %6 = load i32, ptr %4, align 4, !tbaa !5
  %7 = icmp slt i32 %6, 10
  br i1 %7, label %9, label %8

8:                                                ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %16

9:                                                ; preds = %5
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [10 x ptr], ptr %2, i64 0, i64 %11
  store ptr null, ptr %12, align 8, !tbaa !9
  br label %13

13:                                               ; preds = %9
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = add nsw i32 %14, 1
  store i32 %15, ptr %4, align 4, !tbaa !5
  br label %5, !llvm.loop !11

16:                                               ; preds = %8
  %17 = getelementptr inbounds [10 x ptr], ptr %2, i64 0, i64 0
  call void @addedge(ptr noundef %17, i32 noundef 0, i32 noundef 1)
  %18 = getelementptr inbounds [10 x ptr], ptr %2, i64 0, i64 0
  call void @addedge(ptr noundef %18, i32 noundef 0, i32 noundef 3)
  %19 = getelementptr inbounds [10 x ptr], ptr %2, i64 0, i64 0
  call void @addedge(ptr noundef %19, i32 noundef 1, i32 noundef 4)
  %20 = getelementptr inbounds [10 x ptr], ptr %2, i64 0, i64 0
  call void @addedge(ptr noundef %20, i32 noundef 4, i32 noundef 3)
  %21 = getelementptr inbounds [10 x ptr], ptr %2, i64 0, i64 0
  call void @addedge(ptr noundef %21, i32 noundef 2, i32 noundef 4)
  %22 = getelementptr inbounds [10 x ptr], ptr %2, i64 0, i64 0
  call void @addedge(ptr noundef %22, i32 noundef 2, i32 noundef 5)
  %23 = getelementptr inbounds [10 x ptr], ptr %2, i64 0, i64 0
  call void @addedge(ptr noundef %23, i32 noundef 4, i32 noundef 6)
  %24 = getelementptr inbounds [10 x ptr], ptr %2, i64 0, i64 0
  %25 = getelementptr inbounds [10 x %struct.Time], ptr %3, i64 0, i64 0
  call void @TS(ptr noundef %24, ptr noundef %25)
  call void @llvm.lifetime.end.p0(i64 80, ptr %3) #2
  call void @llvm.lifetime.end.p0(i64 80, ptr %2) #2
  ret i32 0
}

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 }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

%struct.Time = type { i32, i32 }

; Function Attrs: nounwind uwtable
declare dso_local void @addedge(ptr noundef, i32 noundef, i32 noundef) 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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind uwtable
declare dso_local void @TS(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca [10 x ptr], align 16
  %2 = alloca [10 x %struct.Time], align 16
  call void @llvm.lifetime.start.p0(i64 80, ptr nonnull %1) #3
  call void @llvm.lifetime.start.p0(i64 80, ptr nonnull %2) #3
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(80) %1, i8 0, i64 80, i1 false), !tbaa !5
  call void @addedge(ptr noundef nonnull %1, i32 noundef 0, i32 noundef 1)
  call void @addedge(ptr noundef nonnull %1, i32 noundef 0, i32 noundef 3)
  call void @addedge(ptr noundef nonnull %1, i32 noundef 1, i32 noundef 4)
  call void @addedge(ptr noundef nonnull %1, i32 noundef 4, i32 noundef 3)
  call void @addedge(ptr noundef nonnull %1, i32 noundef 2, i32 noundef 4)
  call void @addedge(ptr noundef nonnull %1, i32 noundef 2, i32 noundef 5)
  call void @addedge(ptr noundef nonnull %1, i32 noundef 4, i32 noundef 6)
  call void @TS(ptr noundef nonnull %1, ptr noundef nonnull %2)
  call void @llvm.lifetime.end.p0(i64 80, ptr nonnull %2) #3
  call void @llvm.lifetime.end.p0(i64 80, ptr nonnull %1) #3
  ret i32 0
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopIdiomRecognizePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass