; LLVM IR from codeIIEST/Algorithms :: Competitive Coding/Tree/Binary Indexed Tree (binary_indexed_tree)

; 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"

@T = external dso_local global [200002 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
declare dso_local void @_Z6updatexxx(i64 noundef, i64 noundef, i64 noundef) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_Z19binary_indexed_treePxx(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store i64 1, ptr %5, align 8, !tbaa !9
  br label %6

6:                                                ; preds = %14, %2
  %7 = load i64, ptr %5, align 8, !tbaa !9
  %8 = load i64, ptr %4, align 8, !tbaa !9
  %9 = add nsw i64 %8, 1
  %10 = icmp sle i64 %7, %9
  br i1 %10, label %11, label %17

11:                                               ; preds = %6
  %12 = load i64, ptr %5, align 8, !tbaa !9
  %13 = getelementptr inbounds [200002 x i64], ptr @T, i64 0, i64 %12
  store i64 0, ptr %13, align 8, !tbaa !9
  br label %14

14:                                               ; preds = %11
  %15 = load i64, ptr %5, align 8, !tbaa !9
  %16 = add nsw i64 %15, 1
  store i64 %16, ptr %5, align 8, !tbaa !9
  br label %6, !llvm.loop !11

17:                                               ; preds = %6
  store i64 0, ptr %5, align 8, !tbaa !9
  br label %18

18:                                               ; preds = %29, %17
  %19 = load i64, ptr %5, align 8, !tbaa !9
  %20 = load i64, ptr %4, align 8, !tbaa !9
  %21 = icmp slt i64 %19, %20
  br i1 %21, label %22, label %32

22:                                               ; preds = %18
  %23 = load i64, ptr %4, align 8, !tbaa !9
  %24 = load i64, ptr %5, align 8, !tbaa !9
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = load i64, ptr %5, align 8, !tbaa !9
  %27 = getelementptr inbounds i64, ptr %25, i64 %26
  %28 = load i64, ptr %27, align 8, !tbaa !9
  call void @_Z6updatexxx(i64 noundef %23, i64 noundef %24, i64 noundef %28)
  br label %29

29:                                               ; preds = %22
  %30 = load i64, ptr %5, align 8, !tbaa !9
  %31 = add nsw i64 %30, 1
  store i64 %31, ptr %5, align 8, !tbaa !9
  br label %18, !llvm.loop !13

32:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret ptr @T
}

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 = !{!"any pointer", !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"}
!13 = distinct !{!13, !12}


; 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"

@T = external dso_local global [200002 x i64], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z6updatexxx(i64 noundef, i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef nonnull ptr @_Z19binary_indexed_treePxx(ptr nocapture noundef readonly %0, i64 noundef %1) local_unnamed_addr #0 {
  %.not11 = icmp slt i64 %1, 0
  br i1 %.not11, label %._crit_edge, label %.preheader

.preheader:                                       ; preds = %2
  %3 = shl i64 %1, 3
  %4 = add i64 %3, 8
  tail call void @llvm.memset.p0.i64(ptr nonnull align 8 getelementptr inbounds (i8, ptr @T, i64 8), i8 0, i64 %4, i1 false), !tbaa !5
  %.not = icmp eq i64 %1, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph14

.lr.ph14:                                         ; preds = %.preheader, %.lr.ph14
  %.113 = phi i64 [ %7, %.lr.ph14 ], [ 0, %.preheader ]
  %5 = getelementptr inbounds i64, ptr %0, i64 %.113
  %6 = load i64, ptr %5, align 8, !tbaa !5
  tail call void @_Z6updatexxx(i64 noundef %1, i64 noundef %.113, i64 noundef %6)
  %7 = add nuw nsw i64 %.113, 1
  %exitcond.not = icmp eq i64 %7, %1
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph14, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph14, %2, %.preheader
  ret ptr @T
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #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 nounwind willreturn memory(argmem: write) }

!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,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass