; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/402 Division 1/C/C.ll (Z3dfsii)

; 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"

@trie = external dso_local global [300100 x [26 x i32]], align 16
@sz = external dso_local global [300100 x i32], align 16
@h = external dso_local global [300100 x i32], align 16
@mxh = external dso_local global i32, align 4

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  %6 = load i32, ptr %4, align 4, !tbaa !5
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [300100 x i32], ptr @h, i64 0, i64 %8
  store i32 %6, ptr %9, align 4, !tbaa !5
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [300100 x i32], ptr @sz, i64 0, i64 %11
  store i32 1, ptr %12, align 4, !tbaa !5
  %13 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) @mxh, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %14 = load i32, ptr %13, align 4, !tbaa !5
  store i32 %14, ptr @mxh, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %15

15:                                               ; preds = %54, %2
  %16 = load i32, ptr %5, align 4, !tbaa !5
  %17 = icmp slt i32 %16, 26
  br i1 %17, label %19, label %18

18:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %57

19:                                               ; preds = %15
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [300100 x [26 x i32]], ptr @trie, i64 0, i64 %21
  %23 = load i32, ptr %5, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [26 x i32], ptr %22, i64 0, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = icmp ne i32 %26, 0
  br i1 %27, label %29, label %28

28:                                               ; preds = %19
  br label %54

29:                                               ; preds = %19
  %30 = load i32, ptr %3, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [300100 x [26 x i32]], ptr @trie, i64 0, i64 %31
  %33 = load i32, ptr %5, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds [26 x i32], ptr %32, i64 0, i64 %34
  %36 = load i32, ptr %35, align 4, !tbaa !5
  %37 = load i32, ptr %4, align 4, !tbaa !5
  %38 = add nsw i32 %37, 1
  call void @_Z3dfsii(i32 noundef %36, i32 noundef %38)
  %39 = load i32, ptr %3, align 4, !tbaa !5
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds [300100 x [26 x i32]], ptr @trie, i64 0, i64 %40
  %42 = load i32, ptr %5, align 4, !tbaa !5
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds [26 x i32], ptr %41, i64 0, i64 %43
  %45 = load i32, ptr %44, align 4, !tbaa !5
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds [300100 x i32], ptr @sz, i64 0, i64 %46
  %48 = load i32, ptr %47, align 4, !tbaa !5
  %49 = load i32, ptr %3, align 4, !tbaa !5
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds [300100 x i32], ptr @sz, i64 0, i64 %50
  %52 = load i32, ptr %51, align 4, !tbaa !5
  %53 = add nsw i32 %52, %48
  store i32 %53, ptr %51, align 4, !tbaa !5
  br label %54

54:                                               ; preds = %29, %28
  %55 = load i32, ptr %5, align 4, !tbaa !5
  %56 = add nsw i32 %55, 1
  store i32 %56, ptr %5, align 4, !tbaa !5
  br label %15, !llvm.loop !9

57:                                               ; preds = %18
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

attributes #0 = { mustprogress 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 = { inlinehint mustprogress 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple 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"

@trie = external dso_local local_unnamed_addr global [300100 x [26 x i32]], align 16
@sz = external dso_local local_unnamed_addr global [300100 x i32], align 16
@h = external dso_local local_unnamed_addr global [300100 x i32], align 16
@mxh = external dso_local global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z3dfsii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = alloca i32, align 4
  store i32 %1, ptr %3, align 4, !tbaa !5
  %4 = sext i32 %0 to i64
  %5 = getelementptr inbounds [300100 x i32], ptr @h, i64 0, i64 %4
  store i32 %1, ptr %5, align 4, !tbaa !5
  %6 = getelementptr inbounds [300100 x i32], ptr @sz, i64 0, i64 %4
  store i32 1, ptr %6, align 4, !tbaa !5
  %7 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) @mxh, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %8 = load i32, ptr %7, align 4, !tbaa !5
  store i32 %8, ptr @mxh, align 4, !tbaa !5
  br label %10

9:                                                ; preds = %22
  ret void

10:                                               ; preds = %2, %22
  %indvars.iv = phi i64 [ 0, %2 ], [ %indvars.iv.next, %22 ]
  %11 = getelementptr inbounds [300100 x [26 x i32]], ptr @trie, i64 0, i64 %4, i64 %indvars.iv
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %.not = icmp eq i32 %12, 0
  br i1 %.not, label %22, label %13

13:                                               ; preds = %10
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = add nsw i32 %14, 1
  call void @_Z3dfsii(i32 noundef %12, i32 noundef %15)
  %16 = load i32, ptr %11, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [300100 x i32], ptr @sz, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = load i32, ptr %6, align 4, !tbaa !5
  %21 = add nsw i32 %20, %19
  store i32 %21, ptr %6, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %10, %13
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, 26
  br i1 %exitcond.not, label %9, label %10, !llvm.loop !9
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

attributes #0 = { mustprogress 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 = { inlinehint mustprogress 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++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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