; LLVM IR from kazunetakahashi/atcoder :: 2018/1125_code-thanks-festival-2018/F.ll (Z4initv)

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

@N = external dso_local global i32, align 4
@M = external dso_local global i32, align 4
@root = external dso_local global i32, align 4
@S = external dso_local global [310 x i32], align 16
@T = external dso_local global [310 x i32], align 16
@used = external dso_local global [310 x i8], align 16
@ans = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z6calc_Si(i32 noundef) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; 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

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z6calc_ci(i32 noundef) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z9calc_minii(i32 noundef) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z9calc_maxii(i32 noundef) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z4initv() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = load i32, ptr @N, align 4, !tbaa !5
  %5 = sext i32 %4 to i64
  %6 = getelementptr inbounds i32, ptr @S, i64 %5
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #4
  store i32 -1, ptr %1, align 4, !tbaa !5
  call void @_ZSt4fillIPiiEvT_S1_RKT0_(ptr noundef @S, ptr noundef %6, ptr noundef nonnull align 4 dereferenceable(4) %1)
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 0, ptr %2, align 4, !tbaa !5
  call void @_ZSt4fillIPiiEvT_S1_RKT0_(ptr noundef @T, ptr noundef getelementptr inbounds (i32, ptr @T, i64 310), ptr noundef nonnull align 4 dereferenceable(4) %2)
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %26, %0
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = load i32, ptr @N, align 4, !tbaa !5
  %10 = icmp slt i32 %8, %9
  br i1 %10, label %12, label %11

11:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  br label %29

12:                                               ; preds = %7
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [310 x i8], ptr @used, i64 0, i64 %14
  %16 = load i8, ptr %15, align 1, !tbaa !9, !range !11, !noundef !12
  %17 = trunc i8 %16 to i1
  br i1 %17, label %25, label %18

18:                                               ; preds = %12
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = call noundef i32 @_Z6calc_Si(i32 noundef %19)
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [310 x i32], ptr @T, i64 0, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = add nsw i32 %23, 1
  store i32 %24, ptr %22, align 4, !tbaa !5
  br label %25

25:                                               ; preds = %18, %12
  br label %26

26:                                               ; preds = %25
  %27 = load i32, ptr %3, align 4, !tbaa !5
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %3, align 4, !tbaa !5
  br label %7, !llvm.loop !13

29:                                               ; preds = %11
  %30 = load i32, ptr @root, align 4, !tbaa !5
  %31 = call noundef i32 @_Z6calc_ci(i32 noundef %30)
  %32 = load i32, ptr @M, align 4, !tbaa !5
  %33 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @ans) #4
  %34 = trunc i64 %33 to i32
  %35 = sub nsw i32 %32, %34
  %36 = call noundef i32 @_Z9calc_minii(i32 noundef %35)
  %37 = load i32, ptr @M, align 4, !tbaa !5
  %38 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @ans) #4
  %39 = trunc i64 %38 to i32
  %40 = sub nsw i32 %37, %39
  %41 = call noundef i32 @_Z9calc_maxii(i32 noundef %40)
  ret void
}

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4fillIPiiEvT_S1_RKT0_(ptr noundef, ptr noundef, ptr noundef nonnull align 4 dereferenceable(4)) #3

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 = { 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { inlinehint 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 #4 = { 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, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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

@N = external dso_local local_unnamed_addr global i32, align 4
@M = external dso_local local_unnamed_addr global i32, align 4
@root = external dso_local local_unnamed_addr global i32, align 4
@S = external dso_local global [310 x i32], align 16
@T = external dso_local global [310 x i32], align 16
@used = external dso_local local_unnamed_addr global [310 x i8], align 16
@ans = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z6calc_Si(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

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

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z6calc_ci(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z9calc_minii(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z9calc_maxii(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z4initv() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = load i32, ptr @N, align 4, !tbaa !5
  %4 = sext i32 %3 to i64
  %5 = getelementptr inbounds i32, ptr @S, i64 %4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  store i32 -1, ptr %1, align 4, !tbaa !5
  call void @_ZSt4fillIPiiEvT_S1_RKT0_(ptr noundef nonnull @S, ptr noundef nonnull %5, ptr noundef nonnull align 4 dereferenceable(4) %1)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #4
  store i32 0, ptr %2, align 4, !tbaa !5
  call void @_ZSt4fillIPiiEvT_S1_RKT0_(ptr noundef nonnull @T, ptr noundef nonnull getelementptr inbounds (i8, ptr @T, i64 1240), ptr noundef nonnull align 4 dereferenceable(4) %2)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #4
  %6 = load i32, ptr @N, align 4, !tbaa !5
  %7 = icmp sgt i32 %6, 0
  br i1 %7, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %31, %0
  %8 = load i32, ptr @root, align 4, !tbaa !5
  %9 = call noundef i32 @_Z6calc_ci(i32 noundef %8)
  %10 = load i32, ptr @M, align 4, !tbaa !5
  %11 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @ans) #4
  %12 = trunc i64 %11 to i32
  %13 = sub nsw i32 %10, %12
  %14 = call noundef i32 @_Z9calc_minii(i32 noundef %13)
  %15 = load i32, ptr @M, align 4, !tbaa !5
  %16 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @ans) #4
  %17 = trunc i64 %16 to i32
  %18 = sub nsw i32 %15, %17
  %19 = call noundef i32 @_Z9calc_maxii(i32 noundef %18)
  ret void

.lr.ph:                                           ; preds = %0, %31
  %20 = phi i32 [ %32, %31 ], [ %6, %0 ]
  %indvars.iv = phi i64 [ %indvars.iv.next, %31 ], [ 0, %0 ]
  %21 = getelementptr inbounds [310 x i8], ptr @used, i64 0, i64 %indvars.iv
  %22 = load i8, ptr %21, align 1, !tbaa !9, !range !11, !noundef !12
  %23 = trunc nuw i8 %22 to i1
  br i1 %23, label %31, label %24

24:                                               ; preds = %.lr.ph
  %25 = trunc nuw nsw i64 %indvars.iv to i32
  %26 = call noundef i32 @_Z6calc_Si(i32 noundef %25)
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [310 x i32], ptr @T, i64 0, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %28, align 4, !tbaa !5
  %.pre = load i32, ptr @N, align 4, !tbaa !5
  br label %31

31:                                               ; preds = %.lr.ph, %24
  %32 = phi i32 [ %20, %.lr.ph ], [ %.pre, %24 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %33 = sext i32 %32 to i64
  %34 = icmp slt i64 %indvars.iv.next, %33
  br i1 %34, label %.lr.ph, label %._crit_edge, !llvm.loop !13
}

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4fillIPiiEvT_S1_RKT0_(ptr noundef, ptr noundef, ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #3

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 = { 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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { inlinehint 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 #4 = { 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, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass