; LLVM IR from tangjz/acm-icpc :: codeforces/468D.ll (Z7seg_updiiii)

; 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"

@seg = external dso_local global [200003 x i32], 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: 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 @_Z7seg_updiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #1 {
  %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
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = 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
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %13 = load i32, ptr %5, align 4, !tbaa !5
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = call noundef i32 @_Z7seg_idxii(i32 noundef %13, i32 noundef %14)
  store i32 %15, ptr %9, align 4, !tbaa !5
  %16 = load i32, ptr %5, align 4, !tbaa !5
  %17 = load i32, ptr %6, align 4, !tbaa !5
  %18 = icmp eq i32 %16, %17
  br i1 %18, label %19, label %24

19:                                               ; preds = %4
  %20 = load i32, ptr %8, align 4, !tbaa !5
  %21 = load i32, ptr %9, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [200003 x i32], ptr @seg, i64 0, i64 %22
  store i32 %20, ptr %23, align 4, !tbaa !5
  br label %62

24:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %25 = load i32, ptr %5, align 4, !tbaa !5
  %26 = load i32, ptr %6, align 4, !tbaa !5
  %27 = add nsw i32 %25, %26
  %28 = ashr i32 %27, 1
  store i32 %28, ptr %10, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  %29 = load i32, ptr %5, align 4, !tbaa !5
  %30 = load i32, ptr %10, align 4, !tbaa !5
  %31 = call noundef i32 @_Z7seg_idxii(i32 noundef %29, i32 noundef %30)
  store i32 %31, ptr %11, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #3
  %32 = load i32, ptr %10, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  %34 = load i32, ptr %6, align 4, !tbaa !5
  %35 = call noundef i32 @_Z7seg_idxii(i32 noundef %33, i32 noundef %34)
  store i32 %35, ptr %12, align 4, !tbaa !5
  %36 = load i32, ptr %7, align 4, !tbaa !5
  %37 = load i32, ptr %10, align 4, !tbaa !5
  %38 = icmp sle i32 %36, %37
  br i1 %38, label %39, label %44

39:                                               ; preds = %24
  %40 = load i32, ptr %5, align 4, !tbaa !5
  %41 = load i32, ptr %10, align 4, !tbaa !5
  %42 = load i32, ptr %7, align 4, !tbaa !5
  %43 = load i32, ptr %8, align 4, !tbaa !5
  call void @_Z7seg_updiiii(i32 noundef %40, i32 noundef %41, i32 noundef %42, i32 noundef %43)
  br label %50

44:                                               ; preds = %24
  %45 = load i32, ptr %10, align 4, !tbaa !5
  %46 = add nsw i32 %45, 1
  %47 = load i32, ptr %6, align 4, !tbaa !5
  %48 = load i32, ptr %7, align 4, !tbaa !5
  %49 = load i32, ptr %8, align 4, !tbaa !5
  call void @_Z7seg_updiiii(i32 noundef %46, i32 noundef %47, i32 noundef %48, i32 noundef %49)
  br label %50

50:                                               ; preds = %44, %39
  %51 = load i32, ptr %11, align 4, !tbaa !5
  %52 = sext i32 %51 to i64
  %53 = getelementptr inbounds [200003 x i32], ptr @seg, i64 0, i64 %52
  %54 = load i32, ptr %12, align 4, !tbaa !5
  %55 = sext i32 %54 to i64
  %56 = getelementptr inbounds [200003 x i32], ptr @seg, i64 0, i64 %55
  %57 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %53, ptr noundef nonnull align 4 dereferenceable(4) %56)
  %58 = load i32, ptr %57, align 4, !tbaa !5
  %59 = load i32, ptr %9, align 4, !tbaa !5
  %60 = sext i32 %59 to i64
  %61 = getelementptr inbounds [200003 x i32], ptr @seg, i64 0, i64 %60
  store i32 %58, ptr %61, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  br label %62

62:                                               ; preds = %50, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z7seg_idxii(i32 noundef, i32 noundef) #2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #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"

@seg = external dso_local global [200003 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z7seg_updiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = tail call noundef i32 @_Z7seg_idxii(i32 noundef %0, i32 noundef %1)
  %6 = icmp eq i32 %0, %1
  br i1 %6, label %22, label %7

7:                                                ; preds = %4
  %8 = add nsw i32 %1, %0
  %9 = ashr i32 %8, 1
  %10 = tail call noundef i32 @_Z7seg_idxii(i32 noundef %0, i32 noundef %9)
  %11 = add nsw i32 %9, 1
  %12 = tail call noundef i32 @_Z7seg_idxii(i32 noundef %11, i32 noundef %1)
  %.not = icmp slt i32 %9, %2
  br i1 %.not, label %14, label %13

13:                                               ; preds = %7
  tail call void @_Z7seg_updiiii(i32 noundef %0, i32 noundef %9, i32 noundef %2, i32 noundef %3)
  br label %15

14:                                               ; preds = %7
  tail call void @_Z7seg_updiiii(i32 noundef %11, i32 noundef %1, i32 noundef %2, i32 noundef %3)
  br label %15

15:                                               ; preds = %14, %13
  %16 = sext i32 %10 to i64
  %17 = getelementptr inbounds [200003 x i32], ptr @seg, i64 0, i64 %16
  %18 = sext i32 %12 to i64
  %19 = getelementptr inbounds [200003 x i32], ptr @seg, i64 0, i64 %18
  %20 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %17, ptr noundef nonnull align 4 dereferenceable(4) %19)
  %21 = load i32, ptr %20, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %4, %15
  %.sink = phi i32 [ %21, %15 ], [ %3, %4 ]
  %23 = sext i32 %5 to i64
  %24 = getelementptr inbounds [200003 x i32], ptr @seg, i64 0, i64 %23
  store i32 %.sink, ptr %24, align 4, !tbaa !5
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z7seg_idxii(i32 noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

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 = { 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" }

!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