; LLVM IR from tangjz/acm-icpc :: codeforces/gym/102028H.ll (Z7bit_updix)

; 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"

@bit = external dso_local global [2 x [200001 x i64]], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z7bit_updix(i32 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = sext i32 %6 to i64
  %8 = load i64, ptr %4, align 8, !tbaa !9
  %9 = mul nsw i64 %7, %8
  store i64 %9, ptr %5, align 8, !tbaa !9
  br label %10

10:                                               ; preds = %27, %2
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = icmp sgt i32 %11, 0
  br i1 %12, label %14, label %13

13:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  br label %34

14:                                               ; preds = %10
  %15 = load i64, ptr %4, align 8, !tbaa !9
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [200001 x i64], ptr @bit, i64 0, i64 %17
  %19 = load i64, ptr %18, align 8, !tbaa !9
  %20 = add nsw i64 %19, %15
  store i64 %20, ptr %18, align 8, !tbaa !9
  %21 = load i64, ptr %5, align 8, !tbaa !9
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [200001 x i64], ptr getelementptr inbounds ([2 x [200001 x i64]], ptr @bit, i64 0, i64 1), i64 0, i64 %23
  %25 = load i64, ptr %24, align 8, !tbaa !9
  %26 = add nsw i64 %25, %21
  store i64 %26, ptr %24, align 8, !tbaa !9
  br label %27

27:                                               ; preds = %14
  %28 = load i32, ptr %3, align 4, !tbaa !5
  %29 = load i32, ptr %3, align 4, !tbaa !5
  %30 = sub nsw i32 0, %29
  %31 = and i32 %28, %30
  %32 = load i32, ptr %3, align 4, !tbaa !5
  %33 = sub nsw i32 %32, %31
  store i32 %33, ptr %3, align 4, !tbaa !5
  br label %10, !llvm.loop !11

34:                                               ; preds = %13
  ret void
}

; 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

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 = { 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 = !{!"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"

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

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z7bit_updix(i32 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = sext i32 %0 to i64
  %4 = mul nsw i64 %3, %1
  %5 = icmp sgt i32 %0, 0
  br i1 %5, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %2
  ret void

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.010 = phi i32 [ %13, %.lr.ph ], [ %0, %2 ]
  %6 = zext nneg i32 %.010 to i64
  %7 = getelementptr inbounds [200001 x i64], ptr @bit, i64 0, i64 %6
  %8 = load i64, ptr %7, align 8, !tbaa !5
  %9 = add nsw i64 %8, %1
  store i64 %9, ptr %7, align 8, !tbaa !5
  %10 = getelementptr inbounds [200001 x i64], ptr getelementptr inbounds (i8, ptr @bit, i64 1600008), i64 0, i64 %6
  %11 = load i64, ptr %10, align 8, !tbaa !5
  %12 = add nsw i64 %11, %4
  store i64 %12, ptr %10, align 8, !tbaa !5
  %.not = add nsw i32 %.010, -1
  %13 = and i32 %.not, %.010
  %.not11 = icmp eq i32 %13, 0
  br i1 %.not11, label %._crit_edge, label %.lr.ph, !llvm.loop !9
}

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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass