; LLVM IR from lzyrapx/Competitive-Programming :: HDUOJ/2711（线段树）（求区间第K大）.ll (Z5buildiii)

; 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

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

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5buildiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = load i32, ptr %5, align 4, !tbaa !5
  %10 = icmp eq i32 %8, %9
  br i1 %10, label %11, label %19

11:                                               ; preds = %3
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = sub nsw i32 %12, %13
  %15 = add nsw i32 %14, 1
  %16 = load i32, ptr %6, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [44444 x i32], ptr @sum, i64 0, i64 %17
  store i32 %15, ptr %18, align 4, !tbaa !5
  br label %35

19:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = load i32, ptr %5, align 4, !tbaa !5
  %22 = add nsw i32 %20, %21
  %23 = ashr i32 %22, 1
  store i32 %23, ptr %7, align 4, !tbaa !5
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = load i32, ptr %7, align 4, !tbaa !5
  %26 = load i32, ptr %6, align 4, !tbaa !5
  %27 = shl i32 %26, 1
  call void @_Z5buildiii(i32 noundef %24, i32 noundef %25, i32 noundef %27)
  %28 = load i32, ptr %7, align 4, !tbaa !5
  %29 = add nsw i32 %28, 1
  %30 = load i32, ptr %5, align 4, !tbaa !5
  %31 = load i32, ptr %6, align 4, !tbaa !5
  %32 = shl i32 %31, 1
  %33 = or i32 %32, 1
  call void @_Z5buildiii(i32 noundef %29, i32 noundef %30, i32 noundef %33)
  %34 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z7push_upi(i32 noundef %34)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %35

35:                                               ; preds = %19, %11
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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

; 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 @_Z5buildiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq i32 %0, %1
  br i1 %4, label %common.ret, label %7

common.ret:                                       ; preds = %3
  %5 = sext i32 %2 to i64
  %6 = getelementptr inbounds [44444 x i32], ptr @sum, i64 0, i64 %5
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %common.ret15

common.ret15:                                     ; preds = %7, %common.ret
  ret void

7:                                                ; preds = %3
  %8 = add nsw i32 %1, %0
  %9 = ashr i32 %8, 1
  %10 = shl i32 %2, 1
  tail call void @_Z5buildiii(i32 noundef %0, i32 noundef %9, i32 noundef %10)
  %11 = add nsw i32 %9, 1
  %12 = or disjoint i32 %10, 1
  tail call void @_Z5buildiii(i32 noundef %11, i32 noundef %1, i32 noundef %12)
  tail call void @_Z7push_upi(i32 noundef %2)
  br label %common.ret15
}

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,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass