; LLVM IR from tangjz/acm-icpc :: codeforces/complete/193D.ll (Z9push_downii)

; 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.SegTree = type { i32, i32, i32, i32 }

@seg = external dso_local global [600004 x %struct.SegTree], 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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z3idxii(i32 noundef, i32 noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z9push_downii(i32 noundef %0, i32 noundef %1) #2 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %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 %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = call noundef i32 @_Z3idxii(i32 noundef %10, i32 noundef %11)
  store i32 %12, ptr %5, align 4, !tbaa !5
  %13 = load i32, ptr %5, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [600004 x %struct.SegTree], ptr @seg, i64 0, i64 %14
  %16 = getelementptr inbounds %struct.SegTree, ptr %15, i32 0, i32 3
  %17 = load i32, ptr %16, align 4, !tbaa !9
  %18 = icmp ne i32 %17, 0
  br i1 %18, label %20, label %19

19:                                               ; preds = %2
  store i32 1, ptr %6, align 4
  br label %69

20:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = add nsw i32 %21, %22
  %24 = ashr i32 %23, 1
  store i32 %24, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %25 = load i32, ptr %3, align 4, !tbaa !5
  %26 = load i32, ptr %7, align 4, !tbaa !5
  %27 = call noundef i32 @_Z3idxii(i32 noundef %25, i32 noundef %26)
  store i32 %27, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %28 = load i32, ptr %7, align 4, !tbaa !5
  %29 = add nsw i32 %28, 1
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = call noundef i32 @_Z3idxii(i32 noundef %29, i32 noundef %30)
  store i32 %31, ptr %9, align 4, !tbaa !5
  %32 = load i32, ptr %5, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [600004 x %struct.SegTree], ptr @seg, i64 0, i64 %33
  %35 = getelementptr inbounds %struct.SegTree, ptr %34, i32 0, i32 3
  %36 = load i32, ptr %35, align 4, !tbaa !9
  %37 = load i32, ptr %5, align 4, !tbaa !5
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds [600004 x %struct.SegTree], ptr @seg, i64 0, i64 %38
  %40 = getelementptr inbounds %struct.SegTree, ptr %39, i32 0, i32 0
  %41 = load i32, ptr %40, align 16, !tbaa !11
  %42 = add nsw i32 %41, %36
  store i32 %42, ptr %40, align 16, !tbaa !11
  %43 = load i32, ptr %5, align 4, !tbaa !5
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds [600004 x %struct.SegTree], ptr @seg, i64 0, i64 %44
  %46 = getelementptr inbounds %struct.SegTree, ptr %45, i32 0, i32 3
  %47 = load i32, ptr %46, align 4, !tbaa !9
  %48 = load i32, ptr %8, align 4, !tbaa !5
  %49 = sext i32 %48 to i64
  %50 = getelementptr inbounds [600004 x %struct.SegTree], ptr @seg, i64 0, i64 %49
  %51 = getelementptr inbounds %struct.SegTree, ptr %50, i32 0, i32 3
  %52 = load i32, ptr %51, align 4, !tbaa !9
  %53 = add nsw i32 %52, %47
  store i32 %53, ptr %51, align 4, !tbaa !9
  %54 = load i32, ptr %5, align 4, !tbaa !5
  %55 = sext i32 %54 to i64
  %56 = getelementptr inbounds [600004 x %struct.SegTree], ptr @seg, i64 0, i64 %55
  %57 = getelementptr inbounds %struct.SegTree, ptr %56, i32 0, i32 3
  %58 = load i32, ptr %57, align 4, !tbaa !9
  %59 = load i32, ptr %9, align 4, !tbaa !5
  %60 = sext i32 %59 to i64
  %61 = getelementptr inbounds [600004 x %struct.SegTree], ptr @seg, i64 0, i64 %60
  %62 = getelementptr inbounds %struct.SegTree, ptr %61, i32 0, i32 3
  %63 = load i32, ptr %62, align 4, !tbaa !9
  %64 = add nsw i32 %63, %58
  store i32 %64, ptr %62, align 4, !tbaa !9
  %65 = load i32, ptr %5, align 4, !tbaa !5
  %66 = sext i32 %65 to i64
  %67 = getelementptr inbounds [600004 x %struct.SegTree], ptr @seg, i64 0, i64 %66
  %68 = getelementptr inbounds %struct.SegTree, ptr %67, i32 0, i32 3
  store i32 0, ptr %68, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  store i32 0, ptr %6, align 4
  br label %69

69:                                               ; preds = %20, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  %70 = load i32, ptr %6, align 4
  switch i32 %70, label %72 [
    i32 0, label %71
    i32 1, label %71
  ]

71:                                               ; preds = %69, %69
  ret void

72:                                               ; preds = %69
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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 = { 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"}
!9 = !{!10, !6, i64 12}
!10 = !{!"_ZTS7SegTree", !6, i64 0, !6, i64 4, !6, i64 8, !6, i64 12}
!11 = !{!10, !6, i64 0}


; 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.SegTree = type { i32, i32, i32, i32 }

@seg = external dso_local local_unnamed_addr global [600004 x %struct.SegTree], align 16

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z3idxii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z9push_downii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = tail call noundef i32 @_Z3idxii(i32 noundef %0, i32 noundef %1)
  %4 = sext i32 %3 to i64
  %5 = getelementptr inbounds [600004 x %struct.SegTree], ptr @seg, i64 0, i64 %4
  %6 = getelementptr inbounds i8, ptr %5, i64 12
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %.not = icmp eq i32 %7, 0
  br i1 %.not, label %26, label %8

8:                                                ; preds = %2
  %9 = add nsw i32 %1, %0
  %10 = ashr i32 %9, 1
  %11 = tail call noundef i32 @_Z3idxii(i32 noundef %0, i32 noundef %10)
  %12 = add nsw i32 %10, 1
  %13 = tail call noundef i32 @_Z3idxii(i32 noundef %12, i32 noundef %1)
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = load i32, ptr %5, align 16, !tbaa !10
  %16 = add nsw i32 %15, %14
  store i32 %16, ptr %5, align 16, !tbaa !10
  %17 = sext i32 %11 to i64
  %18 = getelementptr inbounds [600004 x %struct.SegTree], ptr @seg, i64 0, i64 %17, i32 3
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = add nsw i32 %19, %14
  store i32 %20, ptr %18, align 4, !tbaa !5
  %21 = load i32, ptr %6, align 4, !tbaa !5
  %22 = sext i32 %13 to i64
  %23 = getelementptr inbounds [600004 x %struct.SegTree], ptr @seg, i64 0, i64 %22, i32 3
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %25 = add nsw i32 %24, %21
  store i32 %25, ptr %23, align 4, !tbaa !5
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %26

26:                                               ; preds = %2, %8
  ret void
}

attributes #0 = { inlinehint 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 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, !7, i64 12}
!6 = !{!"_ZTS7SegTree", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 0}


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