; LLVM IR from kazunetakahashi/atcoder :: 2020/0222_ABC156/D.ll (Z1Cxx)

; 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.Mint = type { i64 }

; 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 i64 @_Z1Cxx(i64 noundef %0, i64 noundef %1) #1 {
  %3 = alloca %class.Mint, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca %class.Mint, align 8
  %8 = alloca %class.Mint, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  call void @_ZN4MintILx1000000007EEC2Ex(ptr noundef nonnull align 8 dereferenceable(8) %3, i64 noundef 1)
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 1, ptr %6, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %22, %2
  %10 = load i64, ptr %6, align 8, !tbaa !5
  %11 = load i64, ptr %5, align 8, !tbaa !5
  %12 = icmp sle i64 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %25

14:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = add nsw i64 %15, 1
  %17 = load i64, ptr %6, align 8, !tbaa !5
  %18 = sub nsw i64 %16, %17
  call void @_ZN4MintILx1000000007EEC2Ex(ptr noundef nonnull align 8 dereferenceable(8) %7, i64 noundef %18)
  %19 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN4MintILx1000000007EEmLERKS0_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %7)
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %20 = load i64, ptr %6, align 8, !tbaa !5
  call void @_ZN4MintILx1000000007EEC2Ex(ptr noundef nonnull align 8 dereferenceable(8) %8, i64 noundef %20)
  %21 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN4MintILx1000000007EEdVERKS0_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %8)
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %22

22:                                               ; preds = %14
  %23 = load i64, ptr %6, align 8, !tbaa !5
  %24 = add nsw i64 %23, 1
  store i64 %24, ptr %6, align 8, !tbaa !5
  br label %9, !llvm.loop !9

25:                                               ; preds = %13
  %26 = getelementptr inbounds %class.Mint, ptr %3, i32 0, i32 0
  %27 = load i64, ptr %26, align 8
  ret i64 %27
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4MintILx1000000007EEC2Ex(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN4MintILx1000000007EEmLERKS0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN4MintILx1000000007EEdVERKS0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #1 align 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 = { 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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.Mint = type { i64 }

; 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
define dso_local i64 @_Z1Cxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #1 {
  %3 = alloca %class.Mint, align 8
  %4 = alloca %class.Mint, align 8
  %5 = alloca %class.Mint, align 8
  call void @_ZN4MintILx1000000007EEC2Ex(ptr noundef nonnull align 8 dereferenceable(8) %3, i64 noundef 1)
  %.not6 = icmp slt i64 %1, 1
  br i1 %.not6, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %6 = add nsw i64 %0, 1
  br label %8

._crit_edge:                                      ; preds = %8, %2
  %7 = load i64, ptr %3, align 8
  ret i64 %7

8:                                                ; preds = %.lr.ph, %8
  %.07 = phi i64 [ 1, %.lr.ph ], [ %12, %8 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %9 = sub i64 %6, %.07
  call void @_ZN4MintILx1000000007EEC2Ex(ptr noundef nonnull align 8 dereferenceable(8) %4, i64 noundef %9)
  %10 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN4MintILx1000000007EEmLERKS0_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %4)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #3
  call void @_ZN4MintILx1000000007EEC2Ex(ptr noundef nonnull align 8 dereferenceable(8) %5, i64 noundef %.07)
  %11 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN4MintILx1000000007EEdVERKS0_(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %5)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #3
  %12 = add nuw i64 %.07, 1
  %exitcond.not = icmp eq i64 %.07, %1
  br i1 %exitcond.not, label %._crit_edge, label %8, !llvm.loop !5
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4MintILx1000000007EEC2Ex(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN4MintILx1000000007EEmLERKS0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN4MintILx1000000007EEdVERKS0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

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 = { 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass