; LLVM IR from Chasmiccoder/Algos-for-Amigos :: Mathematics/Series (p01_fibonacci_series)

; 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"

; 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 nounwind uwtable
define dso_local noundef i32 @_Z60naive_last_digit_sum_of_squares_of_first_n_fibonacci_numbersx(i64 noundef %0) #1 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i64 %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  store i64 0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store i64 1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 2, ptr %6, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %33, %1
  %9 = load i32, ptr %6, align 4, !tbaa !9
  %10 = sext i32 %9 to i64
  %11 = load i64, ptr %2, align 8, !tbaa !5
  %12 = icmp sle i64 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %36

14:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %15 = load i64, ptr %3, align 8, !tbaa !5
  %16 = srem i64 %15, 10
  %17 = trunc i64 %16 to i32
  store i32 %17, ptr %7, align 4, !tbaa !9
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = srem i64 %18, 10
  store i64 %19, ptr %3, align 8, !tbaa !5
  %20 = load i64, ptr %4, align 8, !tbaa !5
  %21 = srem i64 %20, 10
  %22 = load i32, ptr %7, align 4, !tbaa !9
  %23 = srem i32 %22, 10
  %24 = sext i32 %23 to i64
  %25 = add nsw i64 %21, %24
  %26 = srem i64 %25, 10
  store i64 %26, ptr %4, align 8, !tbaa !5
  %27 = load i64, ptr %4, align 8, !tbaa !5
  %28 = load i64, ptr %4, align 8, !tbaa !5
  %29 = mul nsw i64 %27, %28
  %30 = srem i64 %29, 10
  %31 = load i64, ptr %5, align 8, !tbaa !5
  %32 = add nsw i64 %31, %30
  store i64 %32, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %33

33:                                               ; preds = %14
  %34 = load i32, ptr %6, align 4, !tbaa !9
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %6, align 4, !tbaa !9
  br label %8, !llvm.loop !11

36:                                               ; preds = %13
  %37 = load i64, ptr %5, align 8, !tbaa !5
  %38 = trunc i64 %37 to i32
  %39 = srem i32 %38, 10
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret i32 %39
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!10, !10, i64 0}
!10 = !{!"int", !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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef range(i32 -9, 10) i32 @_Z60naive_last_digit_sum_of_squares_of_first_n_fibonacci_numbersx(i64 noundef %0) local_unnamed_addr #0 {
  %.not14 = icmp slt i64 %0, 2
  br i1 %.not14, label %._crit_edge, label %.lr.ph

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %2 = trunc i64 %11 to i32
  %3 = srem i32 %2, 10
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %1
  %.012.lcssa = phi i32 [ 1, %1 ], [ %3, %._crit_edge.loopexit ]
  ret i32 %.012.lcssa

.lr.ph:                                           ; preds = %1, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 2, %1 ]
  %.018 = phi i64 [ %.01315, %.lr.ph ], [ 0, %1 ]
  %.01216 = phi i64 [ %11, %.lr.ph ], [ 1, %1 ]
  %.01315 = phi i64 [ %8, %.lr.ph ], [ 1, %1 ]
  %4 = trunc nsw i64 %.018 to i32
  %5 = srem i32 %4, 10
  %6 = sext i32 %5 to i64
  %7 = add nsw i64 %.01315, %6
  %8 = srem i64 %7, 10
  %9 = mul nsw i64 %8, %8
  %10 = urem i64 %9, 10
  %11 = add nuw nsw i64 %10, %.01216
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond = icmp eq i64 %indvars.iv, %0
  br i1 %exitcond, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !5
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(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" }

!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,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass