; LLVM IR from TheAlgorithms/C-Plus-Plus :: math/modular_division.ll (ZN4math16modular_division5powerEmmm)

; 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 @_ZN4math16modular_division5powerEmmm(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
  %8 = alloca i64, align 8
  %9 = alloca i32, align 4
  store i64 %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  store i64 1, ptr %8, align 8, !tbaa !5
  %10 = load i64, ptr %5, align 8, !tbaa !5
  %11 = load i64, ptr %7, align 8, !tbaa !5
  %12 = urem i64 %10, %11
  store i64 %12, ptr %5, align 8, !tbaa !5
  %13 = load i64, ptr %5, align 8, !tbaa !5
  %14 = icmp eq i64 %13, 0
  br i1 %14, label %15, label %16

15:                                               ; preds = %3
  store i64 0, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %48

16:                                               ; preds = %3
  br label %17

17:                                               ; preds = %34, %16
  %18 = load i64, ptr %6, align 8, !tbaa !5
  %19 = icmp ugt i64 %18, 0
  br i1 %19, label %20, label %46

20:                                               ; preds = %17
  %21 = load i64, ptr %6, align 8, !tbaa !5
  %22 = and i64 %21, 1
  %23 = icmp ne i64 %22, 0
  br i1 %23, label %24, label %34

24:                                               ; preds = %20
  %25 = load i64, ptr %8, align 8, !tbaa !5
  %26 = load i64, ptr %7, align 8, !tbaa !5
  %27 = urem i64 %25, %26
  %28 = load i64, ptr %5, align 8, !tbaa !5
  %29 = load i64, ptr %7, align 8, !tbaa !5
  %30 = urem i64 %28, %29
  %31 = mul i64 %27, %30
  %32 = load i64, ptr %7, align 8, !tbaa !5
  %33 = urem i64 %31, %32
  store i64 %33, ptr %8, align 8, !tbaa !5
  br label %34

34:                                               ; preds = %24, %20
  %35 = load i64, ptr %6, align 8, !tbaa !5
  %36 = lshr i64 %35, 1
  store i64 %36, ptr %6, align 8, !tbaa !5
  %37 = load i64, ptr %5, align 8, !tbaa !5
  %38 = load i64, ptr %7, align 8, !tbaa !5
  %39 = urem i64 %37, %38
  %40 = load i64, ptr %5, align 8, !tbaa !5
  %41 = load i64, ptr %7, align 8, !tbaa !5
  %42 = urem i64 %40, %41
  %43 = mul i64 %39, %42
  %44 = load i64, ptr %7, align 8, !tbaa !5
  %45 = urem i64 %43, %44
  store i64 %45, ptr %5, align 8, !tbaa !5
  br label %17, !llvm.loop !9

46:                                               ; preds = %17
  %47 = load i64, ptr %8, align 8, !tbaa !5
  store i64 %47, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %48

48:                                               ; preds = %46, %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %49 = load i64, ptr %4, align 8
  ret i64 %49
}

; 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", !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 i64 @_ZN4math16modular_division5powerEmmm(i64 noundef %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = urem i64 %0, %2
  %5 = icmp eq i64 %4, 0
  br i1 %5, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %3
  %.not23 = icmp eq i64 %1, 0
  br i1 %.not23, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader, %11
  %.026 = phi i64 [ %.1, %11 ], [ 1, %.preheader ]
  %.01925 = phi i64 [ %12, %11 ], [ %1, %.preheader ]
  %.02024 = phi i64 [ %14, %11 ], [ %4, %.preheader ]
  %6 = and i64 %.01925, 1
  %.not22 = icmp eq i64 %6, 0
  br i1 %.not22, label %11, label %7

7:                                                ; preds = %.lr.ph
  %8 = urem i64 %.026, %2
  %9 = mul i64 %8, %.02024
  %10 = urem i64 %9, %2
  br label %11

11:                                               ; preds = %7, %.lr.ph
  %.1 = phi i64 [ %10, %7 ], [ %.026, %.lr.ph ]
  %12 = lshr i64 %.01925, 1
  %13 = mul i64 %.02024, %.02024
  %14 = urem i64 %13, %2
  %.not = icmp ult i64 %.01925, 2
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !5

.loopexit:                                        ; preds = %11, %.preheader, %3
  %.018 = phi i64 [ 0, %3 ], [ 1, %.preheader ], [ %.1, %11 ]
  ret i64 %.018
}

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