; LLVM IR from lzyrapx/Competitive-Programming :: HDUOJ/2711（线段树）（求区间第K大）.ll (Z6updateiiii)

; 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"

@sum = external dso_local global [44444 x i32], align 16
@L = external dso_local global [44444 x i32], align 16
@cnt = external dso_local global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z7push_upi(i32 noundef) #0

; 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

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6updateiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #2 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store i32 %0, ptr %5, align 4, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !5
  store i32 %3, ptr %8, align 4, !tbaa !5
  %10 = load i32, ptr %6, align 4, !tbaa !5
  %11 = load i32, ptr %7, align 4, !tbaa !5
  %12 = icmp eq i32 %10, %11
  br i1 %12, label %13, label %22

13:                                               ; preds = %4
  %14 = load i32, ptr %8, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [44444 x i32], ptr @sum, i64 0, i64 %15
  store i32 0, ptr %16, align 4, !tbaa !5
  %17 = load i32, ptr %6, align 4, !tbaa !5
  %18 = load i32, ptr @cnt, align 4, !tbaa !5
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr @cnt, align 4, !tbaa !5
  %20 = sext i32 %18 to i64
  %21 = getelementptr inbounds [44444 x i32], ptr @L, i64 0, i64 %20
  store i32 %17, ptr %21, align 4, !tbaa !5
  br label %56

22:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %23 = load i32, ptr %6, align 4, !tbaa !5
  %24 = load i32, ptr %7, align 4, !tbaa !5
  %25 = add nsw i32 %23, %24
  %26 = ashr i32 %25, 1
  store i32 %26, ptr %9, align 4, !tbaa !5
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = load i32, ptr %8, align 4, !tbaa !5
  %29 = shl i32 %28, 1
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds [44444 x i32], ptr @sum, i64 0, i64 %30
  %32 = load i32, ptr %31, align 4, !tbaa !5
  %33 = icmp sle i32 %27, %32
  br i1 %33, label %34, label %40

34:                                               ; preds = %22
  %35 = load i32, ptr %5, align 4, !tbaa !5
  %36 = load i32, ptr %6, align 4, !tbaa !5
  %37 = load i32, ptr %9, align 4, !tbaa !5
  %38 = load i32, ptr %8, align 4, !tbaa !5
  %39 = shl i32 %38, 1
  call void @_Z6updateiiii(i32 noundef %35, i32 noundef %36, i32 noundef %37, i32 noundef %39)
  br label %54

40:                                               ; preds = %22
  %41 = load i32, ptr %5, align 4, !tbaa !5
  %42 = load i32, ptr %8, align 4, !tbaa !5
  %43 = shl i32 %42, 1
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds [44444 x i32], ptr @sum, i64 0, i64 %44
  %46 = load i32, ptr %45, align 4, !tbaa !5
  %47 = sub nsw i32 %41, %46
  %48 = load i32, ptr %9, align 4, !tbaa !5
  %49 = add nsw i32 %48, 1
  %50 = load i32, ptr %7, align 4, !tbaa !5
  %51 = load i32, ptr %8, align 4, !tbaa !5
  %52 = shl i32 %51, 1
  %53 = or i32 %52, 1
  call void @_Z6updateiiii(i32 noundef %47, i32 noundef %49, i32 noundef %50, i32 noundef %53)
  br label %54

54:                                               ; preds = %40, %34
  %55 = load i32, ptr %8, align 4, !tbaa !5
  call void @_Z7push_upi(i32 noundef %55)
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %56

56:                                               ; preds = %54, %13
  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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress 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 #3 = { 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"}


; 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"

@sum = external dso_local local_unnamed_addr global [44444 x i32], align 16
@L = external dso_local local_unnamed_addr global [44444 x i32], align 16
@cnt = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z7push_upi(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6updateiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = icmp eq i32 %1, %2
  br i1 %5, label %6, label %13

6:                                                ; preds = %4
  %7 = sext i32 %3 to i64
  %8 = getelementptr inbounds [44444 x i32], ptr @sum, i64 0, i64 %7
  store i32 0, ptr %8, align 4, !tbaa !5
  %9 = load i32, ptr @cnt, align 4, !tbaa !5
  %10 = add nsw i32 %9, 1
  store i32 %10, ptr @cnt, align 4, !tbaa !5
  %11 = sext i32 %9 to i64
  %12 = getelementptr inbounds [44444 x i32], ptr @L, i64 0, i64 %11
  store i32 %1, ptr %12, align 4, !tbaa !5
  br label %26

13:                                               ; preds = %4
  %14 = add nsw i32 %2, %1
  %15 = ashr i32 %14, 1
  %16 = shl i32 %3, 1
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [44444 x i32], ptr @sum, i64 0, i64 %17
  %19 = load i32, ptr %18, align 8, !tbaa !5
  %.not = icmp slt i32 %19, %0
  br i1 %.not, label %21, label %20

20:                                               ; preds = %13
  tail call void @_Z6updateiiii(i32 noundef %0, i32 noundef %1, i32 noundef %15, i32 noundef %16)
  br label %25

21:                                               ; preds = %13
  %22 = sub nsw i32 %0, %19
  %23 = add nsw i32 %15, 1
  %24 = or disjoint i32 %16, 1
  tail call void @_Z6updateiiii(i32 noundef %22, i32 noundef %23, i32 noundef %2, i32 noundef %24)
  br label %25

25:                                               ; preds = %21, %20
  tail call void @_Z7push_upi(i32 noundef %3)
  br label %26

26:                                               ; preds = %25, %6
  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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,TailCallElimPass