; LLVM IR from ShahjalalShohag/code-library :: Number Theory/Pisano Period.ll (Z5powerxxx)

; 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: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z5powerxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) #0 {
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %8 = load i64, ptr %6, align 8, !tbaa !5
  %9 = srem i64 1, %8
  store i64 %9, ptr %7, align 8, !tbaa !5
  %10 = load i64, ptr %6, align 8, !tbaa !5
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = srem i64 %11, %10
  store i64 %12, ptr %4, align 8, !tbaa !5
  br label %13

13:                                               ; preds = %30, %3
  %14 = load i64, ptr %5, align 8, !tbaa !5
  %15 = icmp ne i64 %14, 0
  br i1 %15, label %16, label %42

16:                                               ; preds = %13
  %17 = load i64, ptr %5, align 8, !tbaa !5
  %18 = and i64 %17, 1
  %19 = icmp ne i64 %18, 0
  br i1 %19, label %20, label %30

20:                                               ; preds = %16
  %21 = load i64, ptr %7, align 8, !tbaa !5
  %22 = sext i64 %21 to i128
  %23 = load i64, ptr %4, align 8, !tbaa !5
  %24 = sext i64 %23 to i128
  %25 = mul nsw i128 %22, %24
  %26 = load i64, ptr %6, align 8, !tbaa !5
  %27 = sext i64 %26 to i128
  %28 = srem i128 %25, %27
  %29 = trunc i128 %28 to i64
  store i64 %29, ptr %7, align 8, !tbaa !5
  br label %30

30:                                               ; preds = %20, %16
  %31 = load i64, ptr %4, align 8, !tbaa !5
  %32 = sext i64 %31 to i128
  %33 = load i64, ptr %4, align 8, !tbaa !5
  %34 = sext i64 %33 to i128
  %35 = mul nsw i128 %32, %34
  %36 = load i64, ptr %6, align 8, !tbaa !5
  %37 = sext i64 %36 to i128
  %38 = srem i128 %35, %37
  %39 = trunc i128 %38 to i64
  store i64 %39, ptr %4, align 8, !tbaa !5
  %40 = load i64, ptr %5, align 8, !tbaa !5
  %41 = ashr i64 %40, 1
  store i64 %41, ptr %5, align 8, !tbaa !5
  br label %13, !llvm.loop !9

42:                                               ; preds = %13
  %43 = load i64, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret i64 %43
}

; 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 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 = { 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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef range(i64 -9223372036854775807, -9223372036854775808) i64 @_Z5powerxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = srem i64 1, %2
  %.not16 = icmp eq i64 %1, 0
  br i1 %.not16, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3
  %5 = srem i64 %0, %2
  %6 = sext i64 %2 to i128
  br label %7

7:                                                ; preds = %.lr.ph, %15
  %.019 = phi i64 [ %4, %.lr.ph ], [ %.1, %15 ]
  %.01318 = phi i64 [ %5, %.lr.ph ], [ %18, %15 ]
  %.01417 = phi i64 [ %1, %.lr.ph ], [ %19, %15 ]
  %8 = and i64 %.01417, 1
  %.not15 = icmp eq i64 %8, 0
  br i1 %.not15, label %._crit_edge20, label %9

._crit_edge20:                                    ; preds = %7
  %.pre = sext i64 %.01318 to i128
  br label %15

9:                                                ; preds = %7
  %10 = sext i64 %.019 to i128
  %11 = sext i64 %.01318 to i128
  %12 = mul nsw i128 %10, %11
  %13 = srem i128 %12, %6
  %14 = trunc nsw i128 %13 to i64
  br label %15

15:                                               ; preds = %._crit_edge20, %9
  %.pre-phi = phi i128 [ %.pre, %._crit_edge20 ], [ %11, %9 ]
  %.1 = phi i64 [ %.019, %._crit_edge20 ], [ %14, %9 ]
  %16 = mul nsw i128 %.pre-phi, %.pre-phi
  %17 = srem i128 %16, %6
  %18 = trunc nsw i128 %17 to i64
  %19 = ashr i64 %.01417, 1
  %.not = icmp ult i64 %.01417, 2
  br i1 %.not, label %._crit_edge, label %7, !llvm.loop !5

._crit_edge:                                      ; preds = %15, %3
  %.0.lcssa = phi i64 [ %4, %3 ], [ %.1, %15 ]
  ret i64 %.0.lcssa
}

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,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass