; LLVM IR from lzyrapx/Competitive-Programming :: ACdream/1063（字典树）.ll (Z4qmaxx)

; 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"

@ch = external dso_local global [550010 x [2 x i64]], align 16
@val = external dso_local global [550010 x i64], align 16

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

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

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z4qmaxx(i64 noundef %0) #1 {
  %2 = alloca i64, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i64 %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 26, ptr %4, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %46, %1
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = icmp sge i32 %7, 0
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %49

10:                                               ; preds = %6
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %11 = load i64, ptr %2, align 8, !tbaa !5
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = zext i32 %12 to i64
  %14 = ashr i64 %11, %13
  %15 = and i64 %14, 1
  %16 = trunc i64 %15 to i32
  store i32 %16, ptr %5, align 4, !tbaa !9
  %17 = load i32, ptr %3, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [550010 x [2 x i64]], ptr @ch, i64 0, i64 %18
  %20 = load i32, ptr %5, align 4, !tbaa !9
  %21 = xor i32 %20, 1
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [2 x i64], ptr %19, i64 0, i64 %22
  %24 = load i64, ptr %23, align 8, !tbaa !5
  %25 = icmp ne i64 %24, 0
  br i1 %25, label %26, label %36

26:                                               ; preds = %10
  %27 = load i32, ptr %3, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [550010 x [2 x i64]], ptr @ch, i64 0, i64 %28
  %30 = load i32, ptr %5, align 4, !tbaa !9
  %31 = xor i32 %30, 1
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [2 x i64], ptr %29, i64 0, i64 %32
  %34 = load i64, ptr %33, align 8, !tbaa !5
  %35 = trunc i64 %34 to i32
  store i32 %35, ptr %3, align 4, !tbaa !9
  br label %45

36:                                               ; preds = %10
  %37 = load i32, ptr %3, align 4, !tbaa !9
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds [550010 x [2 x i64]], ptr @ch, i64 0, i64 %38
  %40 = load i32, ptr %5, align 4, !tbaa !9
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds [2 x i64], ptr %39, i64 0, i64 %41
  %43 = load i64, ptr %42, align 8, !tbaa !5
  %44 = trunc i64 %43 to i32
  store i32 %44, ptr %3, align 4, !tbaa !9
  br label %45

45:                                               ; preds = %36, %26
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %46

46:                                               ; preds = %45
  %47 = load i32, ptr %4, align 4, !tbaa !9
  %48 = add nsw i32 %47, -1
  store i32 %48, ptr %4, align 4, !tbaa !9
  br label %6, !llvm.loop !11

49:                                               ; preds = %9
  %50 = load i32, ptr %3, align 4, !tbaa !9
  %51 = sext i32 %50 to i64
  %52 = getelementptr inbounds [550010 x i64], ptr @val, i64 0, i64 %51
  %53 = load i64, ptr %52, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i64 %53
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple 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"

@ch = external dso_local local_unnamed_addr global [550010 x [2 x i64]], align 16
@val = external dso_local local_unnamed_addr global [550010 x i64], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i64 @_Z4qmaxx(i64 noundef %0) local_unnamed_addr #0 {
  br label %6

2:                                                ; preds = %16
  %sext15 = shl i64 %.1.in, 32
  %3 = ashr exact i64 %sext15, 32
  %4 = getelementptr inbounds [550010 x i64], ptr @val, i64 0, i64 %3
  %5 = load i64, ptr %4, align 8, !tbaa !5
  ret i64 %5

6:                                                ; preds = %27, %1
  %indvars.iv = phi i64 [ 26, %1 ], [ %indvars.iv.next.1, %27 ]
  %.014 = phi i64 [ 0, %1 ], [ %.1.in.1, %27 ]
  %7 = lshr i64 %0, %indvars.iv
  %8 = and i64 %7, 1
  %sext = shl i64 %.014, 32
  %9 = ashr exact i64 %sext, 32
  %10 = xor i64 %8, 1
  %11 = getelementptr inbounds [550010 x [2 x i64]], ptr @ch, i64 0, i64 %9, i64 %10
  %12 = load i64, ptr %11, align 8, !tbaa !5
  %.not = icmp eq i64 %12, 0
  br i1 %.not, label %13, label %16

13:                                               ; preds = %6
  %14 = getelementptr inbounds [550010 x [2 x i64]], ptr @ch, i64 0, i64 %9, i64 %8
  %15 = load i64, ptr %14, align 8, !tbaa !5
  br label %16

16:                                               ; preds = %6, %13
  %.1.in = phi i64 [ %15, %13 ], [ %12, %6 ]
  %.not17 = icmp eq i64 %indvars.iv, 0
  br i1 %.not17, label %2, label %17, !llvm.loop !9

17:                                               ; preds = %16
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %18 = lshr i64 %0, %indvars.iv.next
  %19 = and i64 %18, 1
  %sext.1 = shl i64 %.1.in, 32
  %20 = ashr exact i64 %sext.1, 32
  %21 = xor i64 %19, 1
  %22 = getelementptr inbounds [550010 x [2 x i64]], ptr @ch, i64 0, i64 %20, i64 %21
  %23 = load i64, ptr %22, align 8, !tbaa !5
  %.not.1 = icmp eq i64 %23, 0
  br i1 %.not.1, label %24, label %27

24:                                               ; preds = %17
  %25 = getelementptr inbounds [550010 x [2 x i64]], ptr @ch, i64 0, i64 %20, i64 %19
  %26 = load i64, ptr %25, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %24, %17
  %.1.in.1 = phi i64 [ %26, %24 ], [ %23, %17 ]
  %indvars.iv.next.1 = add nsw i64 %indvars.iv, -2
  br label %6
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) 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 = !{!"long long", !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,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass