; LLVM IR from AlgoGenesis/C :: Backtracking Algorithms/Hamiltonian Path Problem (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"

; Function Attrs: nounwind uwtable
declare dso_local zeroext i1 @isSafe(i32 noundef, ptr noundef, ptr 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
define dso_local zeroext i1 @hamiltonianUtil(ptr noundef %0, ptr noundef %1, i32 noundef %2) #0 {
  %4 = alloca i1, align 1
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !9
  %10 = load i32, ptr %7, align 4, !tbaa !9
  %11 = icmp eq i32 %10, 5
  br i1 %11, label %12, label %13

12:                                               ; preds = %3
  store i1 true, ptr %4, align 1
  br label %48

13:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 1, ptr %8, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %42, %13
  %15 = load i32, ptr %8, align 4, !tbaa !9
  %16 = icmp slt i32 %15, 5
  br i1 %16, label %18, label %17

17:                                               ; preds = %14
  store i32 2, ptr %9, align 4
  br label %45

18:                                               ; preds = %14
  %19 = load i32, ptr %8, align 4, !tbaa !9
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  %22 = load i32, ptr %7, align 4, !tbaa !9
  %23 = call zeroext i1 @isSafe(i32 noundef %19, ptr noundef %20, ptr noundef %21, i32 noundef %22)
  br i1 %23, label %24, label %41

24:                                               ; preds = %18
  %25 = load i32, ptr %8, align 4, !tbaa !9
  %26 = load ptr, ptr %6, align 8, !tbaa !5
  %27 = load i32, ptr %7, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds i32, ptr %26, i64 %28
  store i32 %25, ptr %29, align 4, !tbaa !9
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = load ptr, ptr %6, align 8, !tbaa !5
  %32 = load i32, ptr %7, align 4, !tbaa !9
  %33 = add nsw i32 %32, 1
  %34 = call zeroext i1 @hamiltonianUtil(ptr noundef %30, ptr noundef %31, i32 noundef %33)
  br i1 %34, label %35, label %36

35:                                               ; preds = %24
  store i1 true, ptr %4, align 1
  store i32 1, ptr %9, align 4
  br label %45

36:                                               ; preds = %24
  %37 = load ptr, ptr %6, align 8, !tbaa !5
  %38 = load i32, ptr %7, align 4, !tbaa !9
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds i32, ptr %37, i64 %39
  store i32 -1, ptr %40, align 4, !tbaa !9
  br label %41

41:                                               ; preds = %36, %18
  br label %42

42:                                               ; preds = %41
  %43 = load i32, ptr %8, align 4, !tbaa !9
  %44 = add nsw i32 %43, 1
  store i32 %44, ptr %8, align 4, !tbaa !9
  br label %14, !llvm.loop !11

45:                                               ; preds = %35, %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %46 = load i32, ptr %9, align 4
  switch i32 %46, label %50 [
    i32 2, label %47
    i32 1, label %48
  ]

47:                                               ; preds = %45
  store i1 false, ptr %4, align 1
  br label %48

48:                                               ; preds = %47, %45, %12
  %49 = load i1, ptr %4, align 1
  ret i1 %49

50:                                               ; preds = %45
  unreachable
}

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 = !{!"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 = 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"

; Function Attrs: nounwind uwtable
declare dso_local zeroext i1 @isSafe(i32 noundef, ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef zeroext i1 @hamiltonianUtil(ptr noundef %0, ptr noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq i32 %2, 5
  br i1 %4, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %3
  %5 = sext i32 %2 to i64
  %6 = getelementptr inbounds i32, ptr %1, i64 %5
  %7 = add nsw i32 %2, 1
  %8 = tail call zeroext i1 @isSafe(i32 noundef 1, ptr noundef %0, ptr noundef %1, i32 noundef %2)
  br i1 %8, label %9, label %12

9:                                                ; preds = %.preheader
  store i32 1, ptr %6, align 4, !tbaa !5
  %10 = tail call zeroext i1 @hamiltonianUtil(ptr noundef %0, ptr noundef %1, i32 noundef %7)
  br i1 %10, label %.loopexit, label %11

11:                                               ; preds = %9
  store i32 -1, ptr %6, align 4, !tbaa !5
  br label %12

12:                                               ; preds = %.preheader, %11
  %13 = tail call zeroext i1 @isSafe(i32 noundef 2, ptr noundef %0, ptr noundef %1, i32 noundef %2)
  br i1 %13, label %14, label %17

14:                                               ; preds = %12
  store i32 2, ptr %6, align 4, !tbaa !5
  %15 = tail call zeroext i1 @hamiltonianUtil(ptr noundef %0, ptr noundef %1, i32 noundef %7)
  br i1 %15, label %.loopexit, label %16

16:                                               ; preds = %14
  store i32 -1, ptr %6, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %16, %12
  %18 = tail call zeroext i1 @isSafe(i32 noundef 3, ptr noundef %0, ptr noundef %1, i32 noundef %2)
  br i1 %18, label %19, label %22

19:                                               ; preds = %17
  store i32 3, ptr %6, align 4, !tbaa !5
  %20 = tail call zeroext i1 @hamiltonianUtil(ptr noundef %0, ptr noundef %1, i32 noundef %7)
  br i1 %20, label %.loopexit, label %21

21:                                               ; preds = %19
  store i32 -1, ptr %6, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %21, %17
  %23 = tail call zeroext i1 @isSafe(i32 noundef 4, ptr noundef %0, ptr noundef %1, i32 noundef %2)
  br i1 %23, label %24, label %.loopexit

24:                                               ; preds = %22
  store i32 4, ptr %6, align 4, !tbaa !5
  %25 = tail call zeroext i1 @hamiltonianUtil(ptr noundef %0, ptr noundef %1, i32 noundef %7)
  br i1 %25, label %.loopexit, label %26

26:                                               ; preds = %24
  store i32 -1, ptr %6, align 4, !tbaa !5
  br label %.loopexit

.loopexit:                                        ; preds = %9, %14, %19, %24, %26, %22, %3
  %.1 = phi i1 [ true, %3 ], [ true, %9 ], [ true, %14 ], [ true, %19 ], [ true, %24 ], [ false, %26 ], [ false, %22 ]
  ret i1 %.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" }

!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: ConstraintEliminationPass,CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass