; LLVM IR from Izaron/ACM-ICPC :: Timus Online Judge/Volume 11/2009. Canteen Line.ll (Z9findIdeali)

; 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.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@posle = external dso_local global [1005 x %"class.std::vector"], align 16
@as = external dso_local global %"class.std::vector", align 8
@bs = external dso_local global %"class.std::vector", align 8
@pos = external dso_local global [1005 x i32], align 16
@squad = external dso_local global [1005 x i32], align 16
@idealA = external dso_local global i32, align 4
@idealPos = external dso_local global i32, align 4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 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) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z9findIdeali(i32 noundef %0) #2 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  %10 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @as) #4
  %11 = trunc i64 %10 to i32
  store i32 %11, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  %12 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @bs) #4
  %13 = trunc i64 %12 to i32
  store i32 %13, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %63, %1
  %15 = load i32, ptr %5, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = load i32, ptr %2, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [1005 x %"class.std::vector"], ptr @posle, i64 0, i64 %18
  %20 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %19) #4
  %21 = icmp ult i64 %16, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %14
  store i32 2, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %66

23:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  %24 = load i32, ptr %2, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [1005 x %"class.std::vector"], ptr @posle, i64 0, i64 %25
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %26, i64 noundef %28) #4
  %30 = load i32, ptr %29, align 4, !tbaa !5
  store i32 %30, ptr %7, align 4, !tbaa !5
  %31 = load i32, ptr %7, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [1005 x i32], ptr @pos, i64 0, i64 %32
  %34 = load i32, ptr %33, align 4, !tbaa !5
  %35 = icmp eq i32 %34, -1
  br i1 %35, label %36, label %37

36:                                               ; preds = %23
  store i32 4, ptr %6, align 4
  br label %60

37:                                               ; preds = %23
  %38 = load i32, ptr %7, align 4, !tbaa !5
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [1005 x i32], ptr @squad, i64 0, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !5
  %42 = icmp eq i32 %41, 0
  br i1 %42, label %43, label %51

43:                                               ; preds = %37
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  %44 = load i32, ptr %7, align 4, !tbaa !5
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds [1005 x i32], ptr @pos, i64 0, i64 %45
  %47 = load i32, ptr %46, align 4, !tbaa !5
  %48 = add nsw i32 %47, 1
  store i32 %48, ptr %8, align 4, !tbaa !5
  %49 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(4) %8)
  %50 = load i32, ptr %49, align 4, !tbaa !5
  store i32 %50, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  br label %59

51:                                               ; preds = %37
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #4
  %52 = load i32, ptr %7, align 4, !tbaa !5
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds [1005 x i32], ptr @pos, i64 0, i64 %53
  %55 = load i32, ptr %54, align 4, !tbaa !5
  %56 = add nsw i32 %55, 1
  store i32 %56, ptr %9, align 4, !tbaa !5
  %57 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(4) %9)
  %58 = load i32, ptr %57, align 4, !tbaa !5
  store i32 %58, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #4
  br label %59

59:                                               ; preds = %51, %43
  store i32 0, ptr %6, align 4
  br label %60

60:                                               ; preds = %59, %36
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  %61 = load i32, ptr %6, align 4
  switch i32 %61, label %75 [
    i32 0, label %62
    i32 4, label %63
  ]

62:                                               ; preds = %60
  br label %63

63:                                               ; preds = %62, %60
  %64 = load i32, ptr %5, align 4, !tbaa !5
  %65 = add nsw i32 %64, 1
  store i32 %65, ptr %5, align 4, !tbaa !5
  br label %14, !llvm.loop !9

66:                                               ; preds = %22
  %67 = load i32, ptr %3, align 4, !tbaa !5
  %68 = load i32, ptr %4, align 4, !tbaa !5
  %69 = icmp sle i32 %67, %68
  br i1 %69, label %70, label %72

70:                                               ; preds = %66
  store i32 0, ptr @idealA, align 4, !tbaa !5
  %71 = load i32, ptr %3, align 4, !tbaa !5
  store i32 %71, ptr @idealPos, align 4, !tbaa !5
  br label %74

72:                                               ; preds = %66
  store i32 1, ptr @idealA, align 4, !tbaa !5
  %73 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %73, ptr @idealPos, align 4, !tbaa !5
  br label %74

74:                                               ; preds = %72, %70
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  ret void

75:                                               ; preds = %60
  unreachable
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 = { inlinehint 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 #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 = 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@posle = external dso_local global [1005 x %"class.std::vector"], align 16
@as = external dso_local global %"class.std::vector", align 8
@bs = external dso_local global %"class.std::vector", align 8
@pos = external dso_local local_unnamed_addr global [1005 x i32], align 16
@squad = external dso_local local_unnamed_addr global [1005 x i32], align 16
@idealA = external dso_local local_unnamed_addr global i32, align 4
@idealPos = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 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 #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z9findIdeali(i32 noundef %0) local_unnamed_addr #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #4
  %6 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @as) #4
  %7 = trunc i64 %6 to i32
  store i32 %7, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #4
  %8 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @bs) #4
  %9 = trunc i64 %8 to i32
  store i32 %9, ptr %3, align 4, !tbaa !5
  %10 = sext i32 %0 to i64
  %11 = getelementptr inbounds [1005 x %"class.std::vector"], ptr @posle, i64 0, i64 %10
  %12 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %11) #4
  %.not14 = icmp eq i64 %12, 0
  br i1 %.not14, label %._crit_edge, label %.lr.ph

._crit_edge.loopexit:                             ; preds = %32
  %.pre = load i32, ptr %2, align 4
  %.pre16 = load i32, ptr %3, align 4
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %1
  %13 = phi i32 [ %.pre16, %._crit_edge.loopexit ], [ %9, %1 ]
  %14 = phi i32 [ %.pre, %._crit_edge.loopexit ], [ %7, %1 ]
  %.not = icmp sgt i32 %14, %13
  %. = zext i1 %.not to i32
  store i32 %., ptr @idealA, align 4, !tbaa !5
  %storemerge = call i32 @llvm.smin.i32(i32 %14, i32 %13)
  store i32 %storemerge, ptr @idealPos, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #4
  ret void

.lr.ph:                                           ; preds = %1, %32
  %indvars.iv = phi i64 [ %indvars.iv.next, %32 ], [ 0, %1 ]
  %15 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %11, i64 noundef %indvars.iv) #4
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [1005 x i32], ptr @pos, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = icmp eq i32 %19, -1
  br i1 %20, label %32, label %21

21:                                               ; preds = %.lr.ph
  %22 = getelementptr inbounds [1005 x i32], ptr @squad, i64 0, i64 %17
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = icmp eq i32 %23, 0
  %25 = add nuw nsw i32 %19, 1
  br i1 %24, label %26, label %29

26:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #4
  store i32 %25, ptr %4, align 4, !tbaa !5
  %27 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %2, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %28 = load i32, ptr %27, align 4, !tbaa !5
  store i32 %28, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #4
  br label %32

29:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #4
  store i32 %25, ptr %5, align 4, !tbaa !5
  %30 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(4) %5)
  %31 = load i32, ptr %30, align 4, !tbaa !5
  store i32 %31, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #4
  br label %32

32:                                               ; preds = %26, %29, %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %33 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %11) #4
  %34 = icmp ugt i64 %33, %indvars.iv.next
  br i1 %34, label %.lr.ph, label %._crit_edge.loopexit, !llvm.loop !9
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #3

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { inlinehint 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 speculatable willreturn memory(none) }
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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass