; LLVM IR from Tunghohin/Competitive_Coding :: Nowcoder/21791_G.ll (Z1Cxxx)

; 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
declare dso_local noundef i64 @_Z4qpowxxx(i64 noundef, i64 noundef, i64 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 nounwind uwtable
define dso_local noundef i64 @_Z1Cxxx(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 i64, align 8
  %10 = alloca i64, align 8
  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
  %11 = load i64, ptr %6, align 8, !tbaa !5
  %12 = load i64, ptr %5, align 8, !tbaa !5
  %13 = icmp sgt i64 %11, %12
  br i1 %13, label %14, label %15

14:                                               ; preds = %3
  store i64 0, ptr %4, align 8
  br label %44

15:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  store i64 1, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  store i64 1, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %16 = load i64, ptr %5, align 8, !tbaa !5
  store i64 %16, ptr %10, align 8, !tbaa !5
  br label %17

17:                                               ; preds = %37, %15
  %18 = load i64, ptr %9, align 8, !tbaa !5
  %19 = load i64, ptr %6, align 8, !tbaa !5
  %20 = icmp sle i64 %18, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  br label %42

22:                                               ; preds = %17
  %23 = load i64, ptr %8, align 8, !tbaa !5
  %24 = load i64, ptr %10, align 8, !tbaa !5
  %25 = mul nsw i64 %23, %24
  %26 = load i64, ptr %7, align 8, !tbaa !5
  %27 = srem i64 %25, %26
  store i64 %27, ptr %8, align 8, !tbaa !5
  %28 = load i64, ptr %8, align 8, !tbaa !5
  %29 = load i64, ptr %9, align 8, !tbaa !5
  %30 = load i64, ptr %7, align 8, !tbaa !5
  %31 = sub nsw i64 %30, 2
  %32 = load i64, ptr %7, align 8, !tbaa !5
  %33 = call noundef i64 @_Z4qpowxxx(i64 noundef %29, i64 noundef %31, i64 noundef %32)
  %34 = mul nsw i64 %28, %33
  %35 = load i64, ptr %7, align 8, !tbaa !5
  %36 = srem i64 %34, %35
  store i64 %36, ptr %8, align 8, !tbaa !5
  br label %37

37:                                               ; preds = %22
  %38 = load i64, ptr %9, align 8, !tbaa !5
  %39 = add nsw i64 %38, 1
  store i64 %39, ptr %9, align 8, !tbaa !5
  %40 = load i64, ptr %10, align 8, !tbaa !5
  %41 = add nsw i64 %40, -1
  store i64 %41, ptr %10, align 8, !tbaa !5
  br label %17, !llvm.loop !9

42:                                               ; preds = %21
  %43 = load i64, ptr %8, align 8, !tbaa !5
  store i64 %43, ptr %4, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  br label %44

44:                                               ; preds = %42, %14
  %45 = load i64, ptr %4, align 8
  ret i64 %45
}

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 nounwind uwtable
declare dso_local noundef i64 @_Z4qpowxxx(i64 noundef, i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z1Cxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = icmp sgt i64 %1, %0
  br i1 %4, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %3
  %.not22 = icmp slt i64 %1, 1
  br i1 %.not22, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader
  %5 = add nsw i64 %2, -2
  br label %6

6:                                                ; preds = %.lr.ph, %6
  %.025 = phi i64 [ %0, %.lr.ph ], [ %13, %6 ]
  %.01724 = phi i64 [ 1, %.lr.ph ], [ %12, %6 ]
  %.01823 = phi i64 [ 1, %.lr.ph ], [ %11, %6 ]
  %7 = mul nsw i64 %.025, %.01823
  %8 = srem i64 %7, %2
  %9 = tail call noundef i64 @_Z4qpowxxx(i64 noundef %.01724, i64 noundef %5, i64 noundef %2)
  %10 = mul nsw i64 %9, %8
  %11 = srem i64 %10, %2
  %12 = add nuw i64 %.01724, 1
  %13 = add nsw i64 %.025, -1
  %exitcond.not = icmp eq i64 %.01724, %1
  br i1 %exitcond.not, label %.loopexit, label %6, !llvm.loop !5

.loopexit:                                        ; preds = %6, %.preheader, %3
  %.019 = phi i64 [ 0, %3 ], [ 1, %.preheader ], [ %11, %6 ]
  ret i64 %.019
}

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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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