; LLVM IR from tangjz/acm-icpc :: codeforces/complete/1175G.ll (Z7seg_queiiii)

; 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@sR = external dso_local global [40003 x %"class.std::vector"], 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
declare dso_local noundef i32 @_Z7seg_queRSt6vectorISt4pairIiiESaIS1_EEi(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef) #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)) #2

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

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z7seg_queiiii(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)
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [40003 x %"class.std::vector"], ptr @sR, i64 0, i64 %16
  %18 = load i32, ptr %8, align 4, !tbaa !5
  %19 = call noundef i32 @_Z7seg_queRSt6vectorISt4pairIiiESaIS1_EEi(ptr noundef nonnull align 8 dereferenceable(24) %17, i32 noundef %18)
  store i32 %19, ptr %9, align 4, !tbaa !5
  %20 = load i32, ptr %5, align 4, !tbaa !5
  %21 = load i32, ptr %6, align 4, !tbaa !5
  %22 = icmp slt i32 %20, %21
  br i1 %22, label %23, label %49

23:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = load i32, ptr %6, align 4, !tbaa !5
  %26 = add nsw i32 %24, %25
  %27 = ashr i32 %26, 1
  store i32 %27, ptr %10, align 4, !tbaa !5
  %28 = load i32, ptr %7, align 4, !tbaa !5
  %29 = load i32, ptr %10, align 4, !tbaa !5
  %30 = icmp sle i32 %28, %29
  br i1 %30, label %31, label %39

31:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  %32 = load i32, ptr %5, align 4, !tbaa !5
  %33 = load i32, ptr %10, align 4, !tbaa !5
  %34 = load i32, ptr %7, align 4, !tbaa !5
  %35 = load i32, ptr %8, align 4, !tbaa !5
  %36 = call noundef i32 @_Z7seg_queiiii(i32 noundef %32, i32 noundef %33, i32 noundef %34, i32 noundef %35)
  store i32 %36, ptr %11, align 4, !tbaa !5
  %37 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %9, ptr noundef nonnull align 4 dereferenceable(4) %11)
  %38 = load i32, ptr %37, align 4, !tbaa !5
  store i32 %38, ptr %9, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  br label %48

39:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #3
  %40 = load i32, ptr %10, align 4, !tbaa !5
  %41 = add nsw i32 %40, 1
  %42 = load i32, ptr %6, align 4, !tbaa !5
  %43 = load i32, ptr %7, align 4, !tbaa !5
  %44 = load i32, ptr %8, align 4, !tbaa !5
  %45 = call noundef i32 @_Z7seg_queiiii(i32 noundef %41, i32 noundef %42, i32 noundef %43, i32 noundef %44)
  store i32 %45, ptr %12, align 4, !tbaa !5
  %46 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %9, ptr noundef nonnull align 4 dereferenceable(4) %12)
  %47 = load i32, ptr %46, align 4, !tbaa !5
  store i32 %47, ptr %9, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #3
  br label %48

48:                                               ; preds = %39, %31
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  br label %49

49:                                               ; preds = %48, %4
  %50 = load i32, ptr %9, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  ret i32 %50
}

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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@sR = external dso_local global [40003 x %"class.std::vector"], align 16

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

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z7seg_queRSt6vectorISt4pairIiiESaIS1_EEi(ptr noundef nonnull align 8 dereferenceable(24), 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 #2

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

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z7seg_queiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #1 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #3
  %8 = tail call noundef i32 @_Z7seg_idxii(i32 noundef %0, i32 noundef %1)
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [40003 x %"class.std::vector"], ptr @sR, i64 0, i64 %9
  %11 = tail call noundef i32 @_Z7seg_queRSt6vectorISt4pairIiiESaIS1_EEi(ptr noundef nonnull align 8 dereferenceable(24) %10, i32 noundef %3)
  store i32 %11, ptr %5, align 4, !tbaa !5
  %12 = icmp slt i32 %0, %1
  br i1 %12, label %13, label %25

13:                                               ; preds = %4
  %14 = add nsw i32 %1, %0
  %15 = ashr i32 %14, 1
  %.not = icmp slt i32 %15, %2
  br i1 %.not, label %20, label %16

16:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %6) #3
  %17 = tail call noundef i32 @_Z7seg_queiiii(i32 noundef %0, i32 noundef %15, i32 noundef %2, i32 noundef %3)
  store i32 %17, ptr %6, align 4, !tbaa !5
  %18 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %6)
  %19 = load i32, ptr %18, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %6) #3
  br label %25

20:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %7) #3
  %21 = add nsw i32 %15, 1
  %22 = tail call noundef i32 @_Z7seg_queiiii(i32 noundef %21, i32 noundef %1, i32 noundef %2, i32 noundef %3)
  store i32 %22, ptr %7, align 4, !tbaa !5
  %23 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %7)
  %24 = load i32, ptr %23, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %7) #3
  br label %25

25:                                               ; preds = %16, %20, %4
  %26 = phi i32 [ %19, %16 ], [ %24, %20 ], [ %11, %4 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #3
  ret i32 %26
}

attributes #0 = { mustprogress 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"}


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