; LLVM IR from codeIIEST/Algorithms :: Competitive Coding/Tree/Binary Indexed Tree/SPOJ_ctrick.ll (Z19binary_indexed_treex)

; 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"

; 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 @_Z6updatePxxxx(ptr noundef, i64 noundef, i64 noundef, i64 noundef) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_Z19binary_indexed_treex(i64 noundef %0) #1 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  store i64 %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %5 = call noalias ptr @malloc(i64 noundef 1600016) #4
  store ptr %5, ptr %4, align 8, !tbaa !9
  store i64 1, ptr %3, align 8, !tbaa !5
  br label %6

6:                                                ; preds = %15, %1
  %7 = load i64, ptr %3, align 8, !tbaa !5
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = add nsw i64 %8, 1
  %10 = icmp sle i64 %7, %9
  br i1 %10, label %11, label %18

11:                                               ; preds = %6
  %12 = load ptr, ptr %4, align 8, !tbaa !9
  %13 = load i64, ptr %3, align 8, !tbaa !5
  %14 = getelementptr inbounds i64, ptr %12, i64 %13
  store i64 0, ptr %14, align 8, !tbaa !5
  br label %15

15:                                               ; preds = %11
  %16 = load i64, ptr %3, align 8, !tbaa !5
  %17 = add nsw i64 %16, 1
  store i64 %17, ptr %3, align 8, !tbaa !5
  br label %6, !llvm.loop !11

18:                                               ; preds = %6
  store i64 0, ptr %3, align 8, !tbaa !5
  br label %19

19:                                               ; preds = %27, %18
  %20 = load i64, ptr %3, align 8, !tbaa !5
  %21 = load i64, ptr %2, align 8, !tbaa !5
  %22 = icmp slt i64 %20, %21
  br i1 %22, label %23, label %30

23:                                               ; preds = %19
  %24 = load ptr, ptr %4, align 8, !tbaa !9
  %25 = load i64, ptr %2, align 8, !tbaa !5
  %26 = load i64, ptr %3, align 8, !tbaa !5
  call void @_Z6updatePxxxx(ptr noundef %24, i64 noundef %25, i64 noundef %26, i64 noundef 1)
  br label %27

27:                                               ; preds = %23
  %28 = load i64, ptr %3, align 8, !tbaa !5
  %29 = add nsw i64 %28, 1
  store i64 %29, ptr %3, align 8, !tbaa !5
  br label %19, !llvm.loop !13

30:                                               ; preds = %19
  %31 = load ptr, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  ret ptr %31
}

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

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 allocsize(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 #3 = { nounwind }
attributes #4 = { nounwind allocsize(0) }

!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 = !{!"any pointer", !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"

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z6updatePxxxx(ptr noundef, i64 noundef, i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_Z19binary_indexed_treex(i64 noundef %0) local_unnamed_addr #0 {
  %2 = tail call noalias dereferenceable_or_null(1600016) ptr @malloc(i64 noundef 1600016) #3
  %.not12 = icmp slt i64 %0, 0
  br i1 %.not12, label %._crit_edge, label %.preheader

.preheader:                                       ; preds = %1
  %scevgep = getelementptr i8, ptr %2, i64 8
  %3 = shl i64 %0, 3
  %4 = add i64 %3, 8
  tail call void @llvm.memset.p0.i64(ptr align 8 %scevgep, i8 0, i64 %4, i1 false), !tbaa !5
  %.not = icmp eq i64 %0, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph15

.lr.ph15:                                         ; preds = %.preheader, %.lr.ph15
  %.114 = phi i64 [ %5, %.lr.ph15 ], [ 0, %.preheader ]
  tail call void @_Z6updatePxxxx(ptr noundef %2, i64 noundef %0, i64 noundef %.114, i64 noundef 1)
  %5 = add nuw nsw i64 %.114, 1
  %exitcond.not = icmp eq i64 %5, %0
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph15, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph15, %1, %.preheader
  ret ptr %2
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

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 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { nounwind allocsize(0) }

!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,SROAPass,SimplifyCFGPass,TailCallElimPass