; LLVM IR from smv1999/CompetitiveProgrammingQuestionBank :: Backtracking (sudoku)

; 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"

@.str = external hidden unnamed_addr constant [2 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local void @sudokuPrinter(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %3, align 4, !tbaa !9
  %5 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  br label %6

6:                                                ; preds = %27, %1
  %7 = load i32, ptr %3, align 4, !tbaa !9
  %8 = icmp slt i32 %7, 9
  br i1 %8, label %9, label %31

9:                                                ; preds = %6
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %23, %9
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = icmp slt i32 %11, 9
  br i1 %12, label %13, label %26

13:                                               ; preds = %10
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = load i32, ptr %3, align 4, !tbaa !9
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [9 x i32], ptr %14, i64 %16
  %18 = load i32, ptr %4, align 4, !tbaa !9
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [9 x i32], ptr %17, i64 0, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !9
  %22 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %21)
  br label %23

23:                                               ; preds = %13
  %24 = load i32, ptr %4, align 4, !tbaa !9
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %4, align 4, !tbaa !9
  br label %10, !llvm.loop !11

26:                                               ; preds = %10
  br label %27

27:                                               ; preds = %26
  %28 = load i32, ptr %3, align 4, !tbaa !9
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %3, align 4, !tbaa !9
  %30 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  br label %6, !llvm.loop !13

31:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

declare i32 @printf(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 = { "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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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"

@.str = external hidden unnamed_addr constant [2 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local void @sudokuPrinter(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  br label %.preheader

.preheader:                                       ; preds = %1, %.preheader
  %indvars.iv = phi i64 [ 0, %1 ], [ %indvars.iv.next, %.preheader ]
  %3 = getelementptr inbounds [9 x i32], ptr %0, i64 %indvars.iv, i64 0
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %5 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %4)
  %6 = getelementptr inbounds [9 x i32], ptr %0, i64 %indvars.iv, i64 1
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %8 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %7)
  %9 = getelementptr inbounds [9 x i32], ptr %0, i64 %indvars.iv, i64 2
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %10)
  %12 = getelementptr inbounds [9 x i32], ptr %0, i64 %indvars.iv, i64 3
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %13)
  %15 = getelementptr inbounds [9 x i32], ptr %0, i64 %indvars.iv, i64 4
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %16)
  %18 = getelementptr inbounds [9 x i32], ptr %0, i64 %indvars.iv, i64 5
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %19)
  %21 = getelementptr inbounds [9 x i32], ptr %0, i64 %indvars.iv, i64 6
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %22)
  %24 = getelementptr inbounds [9 x i32], ptr %0, i64 %indvars.iv, i64 7
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %25)
  %27 = getelementptr inbounds [9 x i32], ptr %0, i64 %indvars.iv, i64 8
  %28 = load i32, ptr %27, align 4, !tbaa !5
  %29 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %28)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %30 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  %exitcond.not = icmp eq i64 %indvars.iv.next, 9
  br i1 %exitcond.not, label %31, label %.preheader, !llvm.loop !9

31:                                               ; preds = %.preheader
  ret void
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { nofree 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 = { nofree 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" }

!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"}


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