; LLVM IR from eyangch/competitive-programming :: Codeforces/1622/d.ll (Z3invx)

; 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"

@MOD = external dso_local global i64, align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z3invx(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  store i64 %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  store i64 1, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %28, %1
  %6 = load i64, ptr %4, align 8, !tbaa !5
  %7 = icmp slt i64 %6, 35
  br i1 %7, label %9, label %8

8:                                                ; preds = %5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  br label %31

9:                                                ; preds = %5
  %10 = load i64, ptr @MOD, align 8, !tbaa !5
  %11 = sub nsw i64 %10, 2
  %12 = load i64, ptr %4, align 8, !tbaa !5
  %13 = shl i64 1, %12
  %14 = and i64 %11, %13
  %15 = icmp ne i64 %14, 0
  br i1 %15, label %16, label %22

16:                                               ; preds = %9
  %17 = load i64, ptr %3, align 8, !tbaa !5
  %18 = load i64, ptr %2, align 8, !tbaa !5
  %19 = mul nsw i64 %17, %18
  %20 = load i64, ptr @MOD, align 8, !tbaa !5
  %21 = srem i64 %19, %20
  store i64 %21, ptr %3, align 8, !tbaa !5
  br label %22

22:                                               ; preds = %16, %9
  %23 = load i64, ptr %2, align 8, !tbaa !5
  %24 = load i64, ptr %2, align 8, !tbaa !5
  %25 = mul nsw i64 %23, %24
  %26 = load i64, ptr @MOD, align 8, !tbaa !5
  %27 = srem i64 %25, %26
  store i64 %27, ptr %2, align 8, !tbaa !5
  br label %28

28:                                               ; preds = %22
  %29 = load i64, ptr %4, align 8, !tbaa !5
  %30 = add nsw i64 %29, 1
  store i64 %30, ptr %4, align 8, !tbaa !5
  br label %5, !llvm.loop !9

31:                                               ; preds = %8
  %32 = load i64, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret i64 %32
}

; 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"

@MOD = external dso_local local_unnamed_addr global i64, align 8

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i64 @_Z3invx(i64 noundef %0) local_unnamed_addr #0 {
  %2 = load i64, ptr @MOD, align 8, !tbaa !5
  %3 = add i64 %2, 9223372036854775806
  br label %5

4:                                                ; preds = %11
  ret i64 %.1

5:                                                ; preds = %1, %11
  %.012 = phi i64 [ 0, %1 ], [ %14, %11 ]
  %.0811 = phi i64 [ 1, %1 ], [ %.1, %11 ]
  %.0910 = phi i64 [ %0, %1 ], [ %13, %11 ]
  %6 = shl nuw nsw i64 1, %.012
  %7 = and i64 %3, %6
  %.not = icmp eq i64 %7, 0
  br i1 %.not, label %11, label %8

8:                                                ; preds = %5
  %9 = mul nsw i64 %.0811, %.0910
  %10 = srem i64 %9, %2
  br label %11

11:                                               ; preds = %8, %5
  %.1 = phi i64 [ %10, %8 ], [ %.0811, %5 ]
  %12 = mul nsw i64 %.0910, %.0910
  %13 = srem i64 %12, %2
  %14 = add nuw nsw i64 %.012, 1
  %exitcond.not = icmp eq i64 %14, 35
  br i1 %exitcond.not, label %4, label %5, !llvm.loop !9
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: 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 = !{!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"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopRotatePass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass