; LLVM IR from AlgoGenesis/C :: Dynamic Programming/Longest Path in DAG (program)

; 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"

@edge_count = external dso_local global [5 x i32], align 16

; Function Attrs: nounwind uwtable
declare dso_local void @addEdge(i32 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 @longestPath(i32 noundef) #0

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

4:                                                ; preds = %12, %0
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = icmp slt i32 %5, 5
  br i1 %6, label %8, label %7

7:                                                ; preds = %4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #2
  br label %15

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

12:                                               ; preds = %8
  %13 = load i32, ptr %2, align 4, !tbaa !5
  %14 = add nsw i32 %13, 1
  store i32 %14, ptr %2, align 4, !tbaa !5
  br label %4, !llvm.loop !9

15:                                               ; preds = %7
  call void @addEdge(i32 noundef 0, i32 noundef 1, i32 noundef 3)
  call void @addEdge(i32 noundef 0, i32 noundef 2, i32 noundef 10)
  call void @addEdge(i32 noundef 0, i32 noundef 3, i32 noundef 14)
  call void @addEdge(i32 noundef 1, i32 noundef 3, i32 noundef 7)
  call void @addEdge(i32 noundef 1, i32 noundef 4, i32 noundef 51)
  call void @addEdge(i32 noundef 2, i32 noundef 3, i32 noundef 5)
  call void @addEdge(i32 noundef 3, i32 noundef 4, i32 noundef 11)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !5
  %16 = load i32, ptr %3, align 4, !tbaa !5
  call void @longestPath(i32 noundef %16)
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #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 = distinct !{!9, !10}
!10 = !{!"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"

@edge_count = external dso_local local_unnamed_addr global [5 x i32], align 16

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

; Function Attrs: nounwind uwtable
declare dso_local void @longestPath(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(20) @edge_count, i8 0, i64 20, i1 false), !tbaa !5
  tail call void @addEdge(i32 noundef 0, i32 noundef 1, i32 noundef 3)
  tail call void @addEdge(i32 noundef 0, i32 noundef 2, i32 noundef 10)
  tail call void @addEdge(i32 noundef 0, i32 noundef 3, i32 noundef 14)
  tail call void @addEdge(i32 noundef 1, i32 noundef 3, i32 noundef 7)
  tail call void @addEdge(i32 noundef 1, i32 noundef 4, i32 noundef 51)
  tail call void @addEdge(i32 noundef 2, i32 noundef 3, i32 noundef 5)
  tail call void @addEdge(i32 noundef 3, i32 noundef 4, i32 noundef 11)
  tail call void @longestPath(i32 noundef 0)
  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) #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 nounwind willreturn memory(argmem: write) }

!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"}


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