; LLVM IR from upupming/algorithm :: acwing/算法竞赛进阶指南/0x49-总结与练习/261. 旅馆.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"

%struct.SegmentTree = type { i32, i32, i64, i64, i64, i64 }

@tree = external dso_local global [200040 x %struct.SegmentTree], align 16

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z6pushupi(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 @_Z5buildiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %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 %5, align 4, !tbaa !5
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [200040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %10
  %12 = getelementptr inbounds %struct.SegmentTree, ptr %11, i32 0, i32 0
  store i32 %8, ptr %12, align 8, !tbaa !9
  %13 = load i32, ptr %6, align 4, !tbaa !5
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [200040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %15
  %17 = getelementptr inbounds %struct.SegmentTree, ptr %16, i32 0, i32 1
  store i32 %13, ptr %17, align 4, !tbaa !12
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = load i32, ptr %6, align 4, !tbaa !5
  %20 = icmp eq i32 %18, %19
  br i1 %20, label %21, label %34

21:                                               ; preds = %3
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [200040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %23
  %25 = getelementptr inbounds %struct.SegmentTree, ptr %24, i32 0, i32 4
  store i64 1, ptr %25, align 8, !tbaa !13
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [200040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %27
  %29 = getelementptr inbounds %struct.SegmentTree, ptr %28, i32 0, i32 3
  store i64 1, ptr %29, align 8, !tbaa !14
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [200040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %31
  %33 = getelementptr inbounds %struct.SegmentTree, ptr %32, i32 0, i32 2
  store i64 1, ptr %33, align 8, !tbaa !15
  br label %50

34:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %35 = load i32, ptr %5, align 4, !tbaa !5
  %36 = load i32, ptr %6, align 4, !tbaa !5
  %37 = add nsw i32 %35, %36
  %38 = ashr i32 %37, 1
  store i32 %38, ptr %7, align 4, !tbaa !5
  %39 = load i32, ptr %4, align 4, !tbaa !5
  %40 = mul nsw i32 2, %39
  %41 = load i32, ptr %5, align 4, !tbaa !5
  %42 = load i32, ptr %7, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %40, i32 noundef %41, i32 noundef %42)
  %43 = load i32, ptr %4, align 4, !tbaa !5
  %44 = mul nsw i32 2, %43
  %45 = add nsw i32 %44, 1
  %46 = load i32, ptr %7, align 4, !tbaa !5
  %47 = add nsw i32 %46, 1
  %48 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %45, i32 noundef %47, i32 noundef %48)
  %49 = load i32, ptr %4, align 4, !tbaa !5
  call void @_Z6pushupi(i32 noundef %49)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %50

50:                                               ; preds = %34, %21
  ret void
}

attributes #0 = { 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 #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, !6, i64 0}
!10 = !{!"_ZTS11SegmentTree", !6, i64 0, !6, i64 4, !11, i64 8, !11, i64 16, !11, i64 24, !11, i64 32}
!11 = !{!"long long", !7, i64 0}
!12 = !{!10, !6, i64 4}
!13 = !{!10, !11, i64 24}
!14 = !{!10, !11, i64 16}
!15 = !{!10, !11, i64 8}


; 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"

%struct.SegmentTree = type { i32, i32, i64, i64, i64, i64 }

@tree = external dso_local local_unnamed_addr global [200040 x %struct.SegmentTree], align 16

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z6pushupi(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5buildiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = sext i32 %0 to i64
  %5 = getelementptr inbounds [200040 x %struct.SegmentTree], ptr @tree, i64 0, i64 %4
  store i32 %1, ptr %5, align 8, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %5, i64 4
  store i32 %2, ptr %6, align 4, !tbaa !11
  %7 = icmp eq i32 %1, %2
  br i1 %7, label %common.ret, label %11

common.ret:                                       ; preds = %3
  %8 = getelementptr inbounds i8, ptr %5, i64 24
  store i64 1, ptr %8, align 8, !tbaa !12
  %9 = getelementptr inbounds i8, ptr %5, i64 16
  store i64 1, ptr %9, align 8, !tbaa !13
  %10 = getelementptr inbounds i8, ptr %5, i64 8
  store i64 1, ptr %10, align 8, !tbaa !14
  br label %common.ret19

common.ret19:                                     ; preds = %11, %common.ret
  ret void

11:                                               ; preds = %3
  %12 = add nsw i32 %2, %1
  %13 = ashr i32 %12, 1
  %14 = shl nsw i32 %0, 1
  tail call void @_Z5buildiii(i32 noundef %14, i32 noundef %1, i32 noundef %13)
  %15 = or disjoint i32 %14, 1
  %16 = add nsw i32 %13, 1
  tail call void @_Z5buildiii(i32 noundef %15, i32 noundef %16, i32 noundef %2)
  tail call void @_Z6pushupi(i32 noundef %0)
  br label %common.ret19
}

attributes #0 = { 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" }

!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, !7, i64 0}
!6 = !{!"_ZTS11SegmentTree", !7, i64 0, !7, i64 4, !10, i64 8, !10, i64 16, !10, i64 24, !10, i64 32}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"long long", !8, i64 0}
!11 = !{!6, !7, i64 4}
!12 = !{!6, !10, i64 24}
!13 = !{!6, !10, i64 16}
!14 = !{!6, !10, i64 8}


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