; LLVM IR from tangjz/acm-icpc :: 51nod/Contest/Algorithm_Marathon_16/F.ll (Z7PolyInviPiS_)

; 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 uwtable
declare dso_local void @_Z14PolyInvIterateiPiiS_(i32 noundef, ptr noundef, i32 noundef, ptr 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 uwtable
define dso_local void @_Z7PolyInviPiS_(i32 noundef %0, ptr noundef %1, ptr noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %8 = load ptr, ptr %5, align 8, !tbaa !9
  %9 = getelementptr inbounds i32, ptr %8, i64 0
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = call noundef i32 @_Z7mod_invi(i32 noundef %10)
  %12 = load ptr, ptr %6, align 8, !tbaa !9
  %13 = getelementptr inbounds i32, ptr %12, i64 0
  store i32 %11, ptr %13, align 4, !tbaa !5
  store i32 2, ptr %7, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %24, %3
  %15 = load i32, ptr %7, align 4, !tbaa !5
  %16 = ashr i32 %15, 1
  %17 = load i32, ptr %4, align 4, !tbaa !5
  %18 = icmp slt i32 %16, %17
  br i1 %18, label %19, label %27

19:                                               ; preds = %14
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = load ptr, ptr %5, align 8, !tbaa !9
  %22 = load i32, ptr %7, align 4, !tbaa !5
  %23 = load ptr, ptr %6, align 8, !tbaa !9
  call void @_Z14PolyInvIterateiPiiS_(i32 noundef %20, ptr noundef %21, i32 noundef %22, ptr noundef %23)
  br label %24

24:                                               ; preds = %19
  %25 = load i32, ptr %7, align 4, !tbaa !5
  %26 = shl i32 %25, 1
  store i32 %26, ptr %7, align 4, !tbaa !5
  br label %14, !llvm.loop !11

27:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  ret void
}

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef i32 @_Z7mod_invi(i32 noundef) #2

attributes #0 = { mustprogress 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 = { inlinehint mustprogress 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 #3 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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 uwtable
declare dso_local void @_Z14PolyInvIterateiPiiS_(i32 noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z7PolyInviPiS_(i32 noundef %0, ptr noundef %1, ptr noundef %2) local_unnamed_addr #0 {
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = tail call noundef i32 @_Z7mod_invi(i32 noundef %4)
  store i32 %5, ptr %2, align 4, !tbaa !5
  %6 = icmp sgt i32 %0, 1
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.09 = phi i32 [ %7, %.lr.ph ], [ 2, %3 ]
  tail call void @_Z14PolyInvIterateiPiiS_(i32 noundef %0, ptr noundef nonnull %1, i32 noundef %.09, ptr noundef nonnull %2)
  %7 = shl i32 %.09, 1
  %8 = ashr exact i32 %7, 1
  %9 = icmp slt i32 %8, %0
  br i1 %9, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %3
  ret void
}

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef i32 @_Z7mod_invi(i32 noundef) local_unnamed_addr #1

attributes #0 = { mustprogress 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 = { inlinehint mustprogress 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 = !{!"int", !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,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass