; LLVM IR from tangjz/acm-icpc :: codeforces/gym/102028H.ll (Z7bit_quei)

; 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"

@n = external dso_local global i32, align 4
@bit = external dso_local global [2 x [200001 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 @_Z7bit_quei(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  store i64 0, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %6 = load i32, ptr %2, align 4, !tbaa !5
  %7 = add nsw i32 %6, 1
  store i32 %7, ptr %5, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %26, %1
  %9 = load i32, ptr %5, align 4, !tbaa !5
  %10 = load i32, ptr @n, align 4, !tbaa !5
  %11 = icmp sle i32 %9, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %33

13:                                               ; preds = %8
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [200001 x i64], ptr @bit, i64 0, i64 %15
  %17 = load i64, ptr %16, align 8, !tbaa !9
  %18 = load i64, ptr %3, align 8, !tbaa !9
  %19 = add nsw i64 %18, %17
  store i64 %19, ptr %3, align 8, !tbaa !9
  %20 = load i32, ptr %5, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [200001 x i64], ptr getelementptr inbounds ([2 x [200001 x i64]], ptr @bit, i64 0, i64 1), i64 0, i64 %21
  %23 = load i64, ptr %22, align 8, !tbaa !9
  %24 = load i64, ptr %4, align 8, !tbaa !9
  %25 = add nsw i64 %24, %23
  store i64 %25, ptr %4, align 8, !tbaa !9
  br label %26

26:                                               ; preds = %13
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = load i32, ptr %5, align 4, !tbaa !5
  %29 = sub nsw i32 0, %28
  %30 = and i32 %27, %29
  %31 = load i32, ptr %5, align 4, !tbaa !5
  %32 = add nsw i32 %31, %30
  store i32 %32, ptr %5, align 4, !tbaa !5
  br label %8, !llvm.loop !11

33:                                               ; preds = %12
  %34 = load i64, ptr %4, align 8, !tbaa !9
  %35 = load i32, ptr %2, align 4, !tbaa !5
  %36 = sext i32 %35 to i64
  %37 = load i64, ptr %3, align 8, !tbaa !9
  %38 = mul nsw i64 %36, %37
  %39 = sub nsw i64 %34, %38
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret i64 %39
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !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"

@n = external dso_local local_unnamed_addr global i32, align 4
@bit = external dso_local local_unnamed_addr global [2 x [200001 x i64]], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i64 @_Z7bit_quei(i32 noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr @n, align 4, !tbaa !5
  %.not14.not = icmp sgt i32 %2, %0
  br i1 %.not14.not, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %1
  %3 = add nsw i32 %0, 1
  br label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %1
  %.013.lcssa = phi i64 [ 0, %1 ], [ %10, %.lr.ph ]
  %.012.lcssa = phi i64 [ 0, %1 ], [ %13, %.lr.ph ]
  %4 = sext i32 %0 to i64
  %5 = mul nsw i64 %.013.lcssa, %4
  %6 = sub nsw i64 %.012.lcssa, %5
  ret i64 %6

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.017 = phi i32 [ %16, %.lr.ph ], [ %3, %.lr.ph.preheader ]
  %.01216 = phi i64 [ %13, %.lr.ph ], [ 0, %.lr.ph.preheader ]
  %.01315 = phi i64 [ %10, %.lr.ph ], [ 0, %.lr.ph.preheader ]
  %7 = sext i32 %.017 to i64
  %8 = getelementptr inbounds [200001 x i64], ptr @bit, i64 0, i64 %7
  %9 = load i64, ptr %8, align 8, !tbaa !9
  %10 = add nsw i64 %9, %.01315
  %11 = getelementptr inbounds [200001 x i64], ptr getelementptr inbounds (i8, ptr @bit, i64 1600008), i64 0, i64 %7
  %12 = load i64, ptr %11, align 8, !tbaa !9
  %13 = add nsw i64 %12, %.01216
  %14 = sub nsw i32 0, %.017
  %15 = and i32 %.017, %14
  %16 = add nsw i32 %15, %.017
  %.not = icmp sgt i32 %16, %2
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !11
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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