; LLVM IR from ACM-VIT/Algos-for-all-Amigos :: Computer_Science/2_Competitive_Programming/Codeforces/800_rating (p01_CopyCopy)

; 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.Element = type { i32, i32 }

; Function Attrs: nounwind uwtable
declare dso_local i32 @hashFunction(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
define dso_local void @update(ptr noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  store i32 %3, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %11 = load i32, ptr %6, align 4, !tbaa !9
  %12 = load i32, ptr %8, align 4, !tbaa !9
  %13 = call i32 @hashFunction(i32 noundef %11, i32 noundef %12)
  store i32 %13, ptr %9, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %39, %4
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = load i32, ptr %9, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds ptr, ptr %15, i64 %17
  %19 = load ptr, ptr %18, align 8, !tbaa !5
  %20 = icmp ne ptr %19, null
  br i1 %20, label %21, label %45

21:                                               ; preds = %14
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = load i32, ptr %9, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds ptr, ptr %22, i64 %24
  %26 = load ptr, ptr %25, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.Element, ptr %26, i32 0, i32 0
  %28 = load i32, ptr %27, align 4, !tbaa !11
  %29 = load i32, ptr %6, align 4, !tbaa !9
  %30 = icmp eq i32 %28, %29
  br i1 %30, label %31, label %39

31:                                               ; preds = %21
  %32 = load i32, ptr %7, align 4, !tbaa !9
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = load i32, ptr %9, align 4, !tbaa !9
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds ptr, ptr %33, i64 %35
  %37 = load ptr, ptr %36, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.Element, ptr %37, i32 0, i32 1
  store i32 %32, ptr %38, align 4, !tbaa !13
  store i32 1, ptr %10, align 4
  br label %46

39:                                               ; preds = %21
  %40 = load i32, ptr %9, align 4, !tbaa !9
  %41 = add nsw i32 %40, 1
  store i32 %41, ptr %9, align 4, !tbaa !9
  %42 = load i32, ptr %9, align 4, !tbaa !9
  %43 = load i32, ptr %8, align 4, !tbaa !9
  %44 = srem i32 %42, %43
  store i32 %44, ptr %9, align 4, !tbaa !9
  br label %14, !llvm.loop !14

45:                                               ; preds = %14
  store i32 1, ptr %10, align 4
  br label %46

46:                                               ; preds = %45, %31
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  ret void
}

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 = !{!12, !10, i64 0}
!12 = !{!"Element", !10, i64 0, !10, i64 4}
!13 = !{!12, !10, i64 4}
!14 = distinct !{!14, !15}
!15 = !{!"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 i32 @hashFunction(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @update(ptr nocapture noundef readonly %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = tail call i32 @hashFunction(i32 noundef %1, i32 noundef %3)
  %6 = sext i32 %5 to i64
  %7 = getelementptr inbounds ptr, ptr %0, i64 %6
  %8 = load ptr, ptr %7, align 8, !tbaa !5
  %.not14 = icmp eq ptr %8, null
  br i1 %.not14, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %4, %14
  %9 = phi ptr [ %19, %14 ], [ %8, %4 ]
  %.015 = phi i32 [ %16, %14 ], [ %5, %4 ]
  %10 = load i32, ptr %9, align 4, !tbaa !9
  %11 = icmp eq i32 %10, %1
  br i1 %11, label %12, label %14

12:                                               ; preds = %.lr.ph
  %13 = getelementptr inbounds i8, ptr %9, i64 4
  store i32 %2, ptr %13, align 4, !tbaa !12
  br label %.loopexit

14:                                               ; preds = %.lr.ph
  %15 = add nsw i32 %.015, 1
  %16 = srem i32 %15, %3
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds ptr, ptr %0, i64 %17
  %19 = load ptr, ptr %18, align 8, !tbaa !5
  %.not = icmp eq ptr %19, null
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !13

.loopexit:                                        ; preds = %14, %4, %12
  ret void
}

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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"Element", !11, i64 0, !11, i64 4}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 4}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass