; LLVM IR from AnneLivia/Competitive-Programming :: Online Judges/URI/1323/main.ll (Z7feynmanRKi)

; 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"

@memo = external dso_local global [101 x i32], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z7feynmanRKi(ptr noundef nonnull align 4 dereferenceable(4) %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = load i32, ptr %5, align 4, !tbaa !9
  %7 = sext i32 %6 to i64
  %8 = getelementptr inbounds [101 x i32], ptr @memo, i64 0, i64 %7
  %9 = load i32, ptr %8, align 4, !tbaa !9
  %10 = icmp ne i32 %9, 0
  br i1 %10, label %11, label %17

11:                                               ; preds = %1
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = load i32, ptr %12, align 4, !tbaa !9
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [101 x i32], ptr @memo, i64 0, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !9
  store i32 %16, ptr %2, align 4
  br label %47

17:                                               ; preds = %1
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = load i32, ptr %18, align 4, !tbaa !9
  %20 = icmp eq i32 %19, 1
  br i1 %20, label %21, label %26

21:                                               ; preds = %17
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = load i32, ptr %22, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [101 x i32], ptr @memo, i64 0, i64 %24
  store i32 1, ptr %25, align 4, !tbaa !9
  br label %41

26:                                               ; preds = %17
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = load i32, ptr %27, align 4, !tbaa !9
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = load i32, ptr %29, align 4, !tbaa !9
  %31 = mul nsw i32 %28, %30
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %32 = load ptr, ptr %3, align 8, !tbaa !5
  %33 = load i32, ptr %32, align 4, !tbaa !9
  %34 = sub nsw i32 %33, 1
  store i32 %34, ptr %4, align 4, !tbaa !9
  %35 = call noundef i32 @_Z7feynmanRKi(ptr noundef nonnull align 4 dereferenceable(4) %4)
  %36 = add nsw i32 %31, %35
  %37 = load ptr, ptr %3, align 8, !tbaa !5
  %38 = load i32, ptr %37, align 4, !tbaa !9
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [101 x i32], ptr @memo, i64 0, i64 %39
  store i32 %36, ptr %40, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %41

41:                                               ; preds = %26, %21
  %42 = load ptr, ptr %3, align 8, !tbaa !5
  %43 = load i32, ptr %42, align 4, !tbaa !9
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds [101 x i32], ptr @memo, i64 0, i64 %44
  %46 = load i32, ptr %45, align 4, !tbaa !9
  store i32 %46, ptr %2, align 4
  br label %47

47:                                               ; preds = %41, %11
  %48 = load i32, ptr %2, align 4
  ret i32 %48
}

; 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

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 = { 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 = !{!"int", !7, i64 0}


; 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"

@memo = external dso_local local_unnamed_addr global [101 x i32], align 16

; Function Attrs: mustprogress nofree nosync nounwind memory(readwrite, argmem: read, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z7feynmanRKi(ptr nocapture noundef nonnull readonly align 4 dereferenceable(4) %0) local_unnamed_addr #0 {
  %2 = alloca i32, align 4
  %3 = load i32, ptr %0, align 4, !tbaa !5
  %4 = sext i32 %3 to i64
  %5 = getelementptr inbounds [101 x i32], ptr @memo, i64 0, i64 %4
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %.not = icmp eq i32 %6, 0
  br i1 %.not, label %7, label %23

7:                                                ; preds = %1
  %8 = icmp eq i32 %3, 1
  br i1 %8, label %9, label %10

9:                                                ; preds = %7
  store i32 1, ptr %5, align 4, !tbaa !5
  br label %18

10:                                               ; preds = %7
  %11 = mul nsw i32 %3, %3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #2
  %12 = add nsw i32 %3, -1
  store i32 %12, ptr %2, align 4, !tbaa !5
  %13 = call noundef i32 @_Z7feynmanRKi(ptr noundef nonnull align 4 dereferenceable(4) %2)
  %14 = add nsw i32 %13, %11
  %15 = load i32, ptr %0, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [101 x i32], ptr @memo, i64 0, i64 %16
  store i32 %14, ptr %17, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #2
  br label %18

18:                                               ; preds = %10, %9
  %19 = load i32, ptr %0, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [101 x i32], ptr @memo, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  br label %23

23:                                               ; preds = %1, %18
  %.0 = phi i32 [ %22, %18 ], [ %6, %1 ]
  ret i32 %.0
}

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

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

attributes #0 = { mustprogress nofree nosync nounwind memory(readwrite, argmem: read, inaccessiblemem: none) 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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass