; LLVM IR from eyangch/competitive-programming :: Codeforces/1748/e.ll (Z4initRSt6vectorIS_I4mintSaIS0_EESaIS2_EE)

; 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"

@N = external dso_local global i64, align 8
@M = external dso_local global i64, align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z4initRSt6vectorIS_I4mintSaIS0_EESaIS2_EE(ptr noundef nonnull align 8 dereferenceable(24) %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  %5 = load i64, ptr @N, align 8, !tbaa !9
  %6 = add nsw i64 %5, 2
  call void @_ZNSt6vectorIS_I4mintSaIS0_EESaIS2_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %6)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  store i64 0, ptr %3, align 8, !tbaa !9
  br label %7

7:                                                ; preds = %19, %1
  %8 = load i64, ptr %3, align 8, !tbaa !9
  %9 = load i64, ptr @N, align 8, !tbaa !9
  %10 = add nsw i64 %9, 1
  %11 = icmp sle i64 %8, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %22

13:                                               ; preds = %7
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = load i64, ptr %3, align 8, !tbaa !9
  %16 = call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_I4mintSaIS0_EESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %14, i64 noundef %15) #3
  %17 = load i64, ptr @M, align 8, !tbaa !9
  %18 = add nsw i64 %17, 1
  call void @_ZNSt6vectorI4mintSaIS0_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24) %16, i64 noundef %18)
  br label %19

19:                                               ; preds = %13
  %20 = load i64, ptr %3, align 8, !tbaa !9
  %21 = add nsw i64 %20, 1
  store i64 %21, ptr %3, align 8, !tbaa !9
  br label %7, !llvm.loop !11

22:                                               ; preds = %12
  ret void
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIS_I4mintSaIS0_EESaIS2_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_I4mintSaIS0_EESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorI4mintSaIS0_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

@N = external dso_local local_unnamed_addr global i64, align 8
@M = external dso_local local_unnamed_addr global i64, align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z4initRSt6vectorIS_I4mintSaIS0_EESaIS2_EE(ptr noundef nonnull align 8 dereferenceable(24) %0) local_unnamed_addr #0 {
  %2 = load i64, ptr @N, align 8, !tbaa !5
  %3 = add nsw i64 %2, 2
  tail call void @_ZNSt6vectorIS_I4mintSaIS0_EESaIS2_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %3)
  %4 = load i64, ptr @N, align 8, !tbaa !5
  %.not4 = icmp slt i64 %4, -1
  br i1 %.not4, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %1
  ret void

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.05 = phi i64 [ %8, %.lr.ph ], [ 0, %1 ]
  %5 = tail call noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_I4mintSaIS0_EESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %.05) #2
  %6 = load i64, ptr @M, align 8, !tbaa !5
  %7 = add nsw i64 %6, 1
  tail call void @_ZNSt6vectorI4mintSaIS0_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24) %5, i64 noundef %7)
  %8 = add nuw nsw i64 %.05, 1
  %9 = load i64, ptr @N, align 8, !tbaa !5
  %.not = icmp sgt i64 %.05, %9
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9
}

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIS_I4mintSaIS0_EESaIS2_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(24) ptr @_ZNSt6vectorIS_I4mintSaIS0_EESaIS2_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorI4mintSaIS0_EE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

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 = { 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass