; LLVM IR from xirc/cp-algorithm :: codeforces/1445/1445A/main.ll (Z5solveiiRSt6vectorIiSaIiEES2_)

; 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"

%"class.__gnu_cxx::__normal_iterator" = type { ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z5solveiiRSt6vectorIiSaIiEES2_(i32 noundef %0, i32 noundef %1, ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 8 dereferenceable(24) %3) #0 {
  %5 = alloca i1, align 1
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %11 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %12 = alloca i32, align 4
  %13 = alloca i32, align 4
  store i32 %0, ptr %6, align 4, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !9
  store ptr %3, ptr %9, align 8, !tbaa !9
  %14 = load ptr, ptr %9, align 8, !tbaa !9
  %15 = call ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %14) #4
  %16 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %10, i32 0, i32 0
  store ptr %15, ptr %16, align 8
  %17 = load ptr, ptr %9, align 8, !tbaa !9
  %18 = call ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %17) #4
  %19 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %11, i32 0, i32 0
  store ptr %18, ptr %19, align 8
  %20 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %10, i32 0, i32 0
  %21 = load ptr, ptr %20, align 8
  %22 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %11, i32 0, i32 0
  %23 = load ptr, ptr %22, align 8
  call void @_ZSt7reverseIN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEEEvT_S7_(ptr %21, ptr %23)
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #4
  store i32 0, ptr %12, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %45, %4
  %25 = load i32, ptr %12, align 4, !tbaa !5
  %26 = load i32, ptr %6, align 4, !tbaa !5
  %27 = icmp slt i32 %25, %26
  br i1 %27, label %29, label %28

28:                                               ; preds = %24
  store i32 2, ptr %13, align 4
  br label %48

29:                                               ; preds = %24
  %30 = load ptr, ptr %8, align 8, !tbaa !9
  %31 = load i32, ptr %12, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %30, i64 noundef %32) #4
  %34 = load i32, ptr %33, align 4, !tbaa !5
  %35 = load ptr, ptr %9, align 8, !tbaa !9
  %36 = load i32, ptr %12, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %35, i64 noundef %37) #4
  %39 = load i32, ptr %38, align 4, !tbaa !5
  %40 = add nsw i32 %34, %39
  %41 = load i32, ptr %7, align 4, !tbaa !5
  %42 = icmp sgt i32 %40, %41
  br i1 %42, label %43, label %44

43:                                               ; preds = %29
  store i1 false, ptr %5, align 1
  store i32 1, ptr %13, align 4
  br label %48

44:                                               ; preds = %29
  br label %45

45:                                               ; preds = %44
  %46 = load i32, ptr %12, align 4, !tbaa !5
  %47 = add nsw i32 %46, 1
  store i32 %47, ptr %12, align 4, !tbaa !5
  br label %24, !llvm.loop !11

48:                                               ; preds = %43, %28
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #4
  %49 = load i32, ptr %13, align 4
  switch i32 %49, label %53 [
    i32 2, label %50
    i32 1, label %51
  ]

50:                                               ; preds = %48
  store i1 true, ptr %5, align 1
  br label %51

51:                                               ; preds = %50, %48
  %52 = load i1, ptr %5, align 1
  ret i1 %52

53:                                               ; preds = %48
  unreachable
}

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt7reverseIN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEEEvT_S7_(ptr, ptr) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

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" }
attributes #2 = { 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 #3 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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
define dso_local noundef zeroext i1 @_Z5solveiiRSt6vectorIiSaIiEES2_(i32 noundef %0, i32 noundef %1, ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 8 dereferenceable(24) %3) local_unnamed_addr #0 {
  %5 = tail call ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %3) #3
  %6 = tail call ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %3) #3
  tail call void @_ZSt7reverseIN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEEEvT_S7_(ptr %5, ptr %6)
  %7 = icmp slt i32 %0, 1
  br i1 %7, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %4
  %8 = zext nneg i32 %0 to i64
  %wide.trip.count = zext nneg i32 %0 to i64
  %9 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef 0) #3
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef 0) #3
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = add nsw i32 %12, %10
  %14 = icmp sgt i32 %13, %1
  br i1 %14, label %._crit_edge, label %.lr.ph18

.lr.ph18:                                         ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv17 = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %.lr.ph.preheader ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv17, 1
  %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !9

.lr.ph:                                           ; preds = %.lr.ph18
  %15 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef %indvars.iv.next) #3
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %3, i64 noundef %indvars.iv.next) #3
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = add nsw i32 %18, %16
  %20 = icmp sgt i32 %19, %1
  br i1 %20, label %._crit_edge.loopexit, label %.lr.ph18, !llvm.loop !9

._crit_edge.loopexit:                             ; preds = %.lr.ph18, %.lr.ph
  %21 = icmp uge i64 %indvars.iv.next, %8
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %.lr.ph.preheader, %4
  %.lcssa = phi i1 [ true, %4 ], [ false, %.lr.ph.preheader ], [ %21, %._crit_edge.loopexit ]
  ret i1 %.lcssa
}

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt7reverseIN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEEEvT_S7_(ptr, ptr) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 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 = { 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 #2 = { 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 #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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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