; LLVM IR from eyangch/competitive-programming :: Codeforces/1552/f.ll (Z3updxx)

; 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"

@MOD = external dso_local global i64, align 8
@N = external dso_local global i64, align 8
@BIT = external dso_local global [800000 x i64], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z3updxx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %19, %2
  %6 = load i64, ptr %3, align 8, !tbaa !5
  %7 = load i64, ptr @N, align 8, !tbaa !5
  %8 = icmp sle i64 %6, %7
  br i1 %8, label %9, label %26

9:                                                ; preds = %5
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = getelementptr inbounds [800000 x i64], ptr @BIT, i64 0, i64 %10
  %12 = load i64, ptr %11, align 8, !tbaa !5
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = add nsw i64 %12, %13
  %15 = load i64, ptr @MOD, align 8, !tbaa !5
  %16 = srem i64 %14, %15
  %17 = load i64, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds [800000 x i64], ptr @BIT, i64 0, i64 %17
  store i64 %16, ptr %18, align 8, !tbaa !5
  br label %19

19:                                               ; preds = %9
  %20 = load i64, ptr %3, align 8, !tbaa !5
  %21 = load i64, ptr %3, align 8, !tbaa !5
  %22 = sub nsw i64 0, %21
  %23 = and i64 %20, %22
  %24 = load i64, ptr %3, align 8, !tbaa !5
  %25 = add nsw i64 %24, %23
  store i64 %25, ptr %3, align 8, !tbaa !5
  br label %5, !llvm.loop !9

26:                                               ; preds = %5
  ret void
}

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" }

!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"}


; 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"

@MOD = external dso_local local_unnamed_addr global i64, align 8
@N = external dso_local local_unnamed_addr global i64, align 8
@BIT = external dso_local local_unnamed_addr global [800000 x i64], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z3updxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = load i64, ptr @N, align 8, !tbaa !5
  %.not7 = icmp slt i64 %3, %0
  br i1 %.not7, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %4 = load i64, ptr @MOD, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %.lr.ph, %5
  %.08 = phi i64 [ %0, %.lr.ph ], [ %12, %5 ]
  %6 = getelementptr inbounds [800000 x i64], ptr @BIT, i64 0, i64 %.08
  %7 = load i64, ptr %6, align 8, !tbaa !5
  %8 = add nsw i64 %7, %1
  %9 = srem i64 %8, %4
  store i64 %9, ptr %6, align 8, !tbaa !5
  %10 = sub nsw i64 0, %.08
  %11 = and i64 %.08, %10
  %12 = add nsw i64 %11, %.08
  %.not = icmp sgt i64 %12, %3
  br i1 %.not, label %._crit_edge, label %5, !llvm.loop !9

._crit_edge:                                      ; preds = %5, %2
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(readwrite, 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,GlobalOptPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass