; LLVM IR from kazunetakahashi/atcoder :: 2017/1106_ABC041/D.ll (Z4calci)

; 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 i32, align 4
@memo = external dso_local global [65536 x i64], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z2okii(i32 noundef, i32 noundef) #0

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

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

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z4calci(i32 noundef %0) #2 {
  %2 = alloca i64, align 8
  %3 = alloca i32, align 4
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [65536 x i64], ptr @memo, i64 0, i64 %8
  %10 = load i64, ptr %9, align 8, !tbaa !9
  %11 = icmp ne i64 %10, -1
  br i1 %11, label %12, label %17

12:                                               ; preds = %1
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [65536 x i64], ptr @memo, i64 0, i64 %14
  %16 = load i64, ptr %15, align 8, !tbaa !9
  store i64 %16, ptr %2, align 8
  br label %53

17:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 0, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %45, %17
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = load i32, ptr @N, align 4, !tbaa !5
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %48

23:                                               ; preds = %18
  %24 = load i32, ptr %3, align 4, !tbaa !5
  %25 = load i32, ptr %5, align 4, !tbaa !5
  %26 = ashr i32 %24, %25
  %27 = and i32 %26, 1
  %28 = icmp eq i32 %27, 1
  br i1 %28, label %29, label %44

29:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %30 = load i32, ptr %3, align 4, !tbaa !5
  %31 = load i32, ptr %5, align 4, !tbaa !5
  %32 = shl i32 1, %31
  %33 = sub nsw i32 %30, %32
  store i32 %33, ptr %6, align 4, !tbaa !5
  %34 = load i32, ptr %6, align 4, !tbaa !5
  %35 = load i32, ptr %5, align 4, !tbaa !5
  %36 = call noundef zeroext i1 @_Z2okii(i32 noundef %34, i32 noundef %35)
  br i1 %36, label %37, label %42

37:                                               ; preds = %29
  %38 = load i32, ptr %6, align 4, !tbaa !5
  %39 = call noundef i64 @_Z4calci(i32 noundef %38)
  %40 = load i64, ptr %4, align 8, !tbaa !9
  %41 = add nsw i64 %40, %39
  store i64 %41, ptr %4, align 8, !tbaa !9
  br label %43

42:                                               ; preds = %29
  br label %43

43:                                               ; preds = %42, %37
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %44

44:                                               ; preds = %43, %23
  br label %45

45:                                               ; preds = %44
  %46 = load i32, ptr %5, align 4, !tbaa !5
  %47 = add nsw i32 %46, 1
  store i32 %47, ptr %5, align 4, !tbaa !5
  br label %18, !llvm.loop !11

48:                                               ; preds = %22
  %49 = load i64, ptr %4, align 8, !tbaa !9
  %50 = load i32, ptr %3, align 4, !tbaa !5
  %51 = sext i32 %50 to i64
  %52 = getelementptr inbounds [65536 x i64], ptr @memo, i64 0, i64 %51
  store i64 %49, ptr %52, align 8, !tbaa !9
  store i64 %49, ptr %2, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %53

53:                                               ; preds = %48, %12
  %54 = load i64, ptr %2, align 8
  ret i64 %54
}

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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"}
!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 i32, align 4
@memo = external dso_local local_unnamed_addr global [65536 x i64], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z2okii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z4calci(i32 noundef %0) local_unnamed_addr #0 {
  %2 = sext i32 %0 to i64
  %3 = getelementptr inbounds [65536 x i64], ptr @memo, i64 0, i64 %2
  %4 = load i64, ptr %3, align 8, !tbaa !5
  %.not = icmp eq i64 %4, -1
  br i1 %.not, label %.preheader, label %19

.preheader:                                       ; preds = %1
  %5 = load i32, ptr @N, align 4, !tbaa !9
  %6 = icmp sgt i32 %5, 0
  br i1 %6, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %15, %.preheader
  %.016.lcssa = phi i64 [ 0, %.preheader ], [ %.2, %15 ]
  store i64 %.016.lcssa, ptr %3, align 8, !tbaa !5
  br label %19

.lr.ph:                                           ; preds = %.preheader, %15
  %.01520 = phi i32 [ %16, %15 ], [ 0, %.preheader ]
  %.01619 = phi i64 [ %.2, %15 ], [ 0, %.preheader ]
  %7 = shl nuw i32 1, %.01520
  %8 = and i32 %7, %0
  %.not18 = icmp eq i32 %8, 0
  br i1 %.not18, label %15, label %9

9:                                                ; preds = %.lr.ph
  %.neg = shl nsw i32 -1, %.01520
  %10 = add i32 %.neg, %0
  %11 = tail call noundef zeroext i1 @_Z2okii(i32 noundef %10, i32 noundef %.01520)
  br i1 %11, label %12, label %15

12:                                               ; preds = %9
  %13 = tail call noundef i64 @_Z4calci(i32 noundef %10)
  %14 = add nsw i64 %13, %.01619
  br label %15

15:                                               ; preds = %12, %9, %.lr.ph
  %.2 = phi i64 [ %.01619, %.lr.ph ], [ %14, %12 ], [ %.01619, %9 ]
  %16 = add nuw nsw i32 %.01520, 1
  %17 = load i32, ptr @N, align 4, !tbaa !9
  %18 = icmp slt i32 %16, %17
  br i1 %18, label %.lr.ph, label %._crit_edge, !llvm.loop !11

19:                                               ; preds = %1, %._crit_edge
  %.0 = phi i64 [ %.016.lcssa, %._crit_edge ], [ %4, %1 ]
  ret i64 %.0
}

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" }

!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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass