; LLVM IR from xirc/cp-algorithm :: atcoder/abc190/D/main.ll (Z5solvel)

; 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 @_Z5solvel(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  %6 = alloca i64, align 8
  store i64 %0, ptr %2, align 8, !tbaa !5
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = mul nsw i64 %7, 2
  store i64 %8, 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
  br label %9

9:                                                ; preds = %38, %1
  %10 = load i64, ptr %4, align 8, !tbaa !5
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = mul nsw i64 %10, %11
  %13 = load i64, ptr %2, align 8, !tbaa !5
  %14 = icmp sle i64 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %9
  store i32 2, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  br label %41

16:                                               ; preds = %9
  %17 = load i64, ptr %2, align 8, !tbaa !5
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = srem i64 %17, %18
  %20 = icmp ne i64 %19, 0
  br i1 %20, label %21, label %22

21:                                               ; preds = %16
  br label %38

22:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %23 = load i64, ptr %2, align 8, !tbaa !5
  %24 = load i64, ptr %4, align 8, !tbaa !5
  %25 = sdiv i64 %23, %24
  store i64 %25, ptr %6, align 8, !tbaa !5
  %26 = load i64, ptr %4, align 8, !tbaa !5
  %27 = load i64, ptr %6, align 8, !tbaa !5
  %28 = add nsw i64 %26, %27
  %29 = srem i64 %28, 2
  %30 = icmp eq i64 %29, 0
  br i1 %30, label %31, label %32

31:                                               ; preds = %22
  store i32 4, ptr %5, align 4
  br label %35

32:                                               ; preds = %22
  %33 = load i64, ptr %3, align 8, !tbaa !5
  %34 = add nsw i64 %33, 2
  store i64 %34, ptr %3, align 8, !tbaa !5
  store i32 0, ptr %5, align 4
  br label %35

35:                                               ; preds = %32, %31
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %36 = load i32, ptr %5, align 4
  switch i32 %36, label %43 [
    i32 0, label %37
    i32 4, label %38
  ]

37:                                               ; preds = %35
  br label %38

38:                                               ; preds = %37, %35, %21
  %39 = load i64, ptr %4, align 8, !tbaa !5
  %40 = add nsw i64 %39, 1
  store i64 %40, ptr %4, align 8, !tbaa !5
  br label %9, !llvm.loop !9

41:                                               ; preds = %15
  %42 = load i64, ptr %3, align 8, !tbaa !5
  store i32 1, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret i64 %42

43:                                               ; preds = %35
  unreachable
}

; 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 @_Z5solvel(i64 noundef %0) local_unnamed_addr #0 {
  %2 = shl nsw i64 %0, 1
  %.not16 = icmp slt i64 %0, 1
  br i1 %.not16, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %1
  %.013.lcssa = phi i64 [ 0, %1 ], [ %.2, %.lr.ph ]
  ret i64 %.013.lcssa

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.018 = phi i64 [ %8, %.lr.ph ], [ 1, %1 ]
  %.01317 = phi i64 [ %.2, %.lr.ph ], [ 0, %1 ]
  %3 = urem i64 %2, %.018
  %4 = udiv i64 %2, %.018
  %.not15 = icmp eq i64 %3, 0
  %5 = add nuw nsw i64 %4, %.018
  %6 = shl nuw i64 %5, 1
  %7 = and i64 %6, 2
  %.1 = add i64 %7, %.01317
  %.2 = select i1 %.not15, i64 %.1, i64 %.01317
  %8 = add nuw nsw i64 %.018, 1
  %9 = mul nuw nsw i64 %8, %8
  %.not = icmp sgt i64 %9, %2
  br i1 %.not, label %._crit_edge, 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: DivRemPairsPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass