; LLVM IR from VastoLorde95/Competitive-Programming :: Hackerrank/Codesprints 2016/Codesprint June/Problem A (A)

; 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::map" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }

@n = external dso_local global i32, align 4
@a = external dso_local global [1100 x i32], align 16
@m = external dso_local global %"class.std::map", align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  store i32 1000000000, ptr %2, align 4, !tbaa !5
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %37, %0
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = load i32, ptr @n, align 4, !tbaa !5
  %9 = icmp slt i32 %7, %8
  br i1 %9, label %11, label %10

10:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  br label %40

11:                                               ; preds = %6
  %12 = load i32, ptr %3, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [1100 x i32], ptr @a, i64 0, i64 %13
  %15 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %14)
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [1100 x i32], ptr @a, i64 0, i64 %17
  %19 = call noundef i64 @_ZNKSt3mapIiiSt4lessIiESaISt4pairIKiiEEE5countERS3_(ptr noundef nonnull align 8 dereferenceable(48) @m, ptr noundef nonnull align 4 dereferenceable(4) %18)
  %20 = icmp ne i64 %19, 0
  br i1 %20, label %21, label %31

21:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = load i32, ptr %3, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [1100 x i32], ptr @a, i64 0, i64 %24
  %26 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @m, ptr noundef nonnull align 4 dereferenceable(4) %25)
  %27 = load i32, ptr %26, align 4, !tbaa !5
  %28 = sub nsw i32 %22, %27
  store i32 %28, ptr %4, align 4, !tbaa !5
  %29 = 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)
  %30 = load i32, ptr %29, align 4, !tbaa !5
  store i32 %30, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  br label %31

31:                                               ; preds = %21, %11
  %32 = load i32, ptr %3, align 4, !tbaa !5
  %33 = load i32, ptr %3, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds [1100 x i32], ptr @a, i64 0, i64 %34
  %36 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @m, ptr noundef nonnull align 4 dereferenceable(4) %35)
  store i32 %32, ptr %36, align 4, !tbaa !5
  br label %37

37:                                               ; preds = %31
  %38 = load i32, ptr %3, align 4, !tbaa !5
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %3, align 4, !tbaa !5
  br label %6, !llvm.loop !9

40:                                               ; preds = %10
  %41 = load i32, ptr %2, align 4, !tbaa !5
  %42 = sitofp i32 %41 to double
  %43 = fcmp oeq double %42, 1.000000e+09
  br i1 %43, label %44, label %45

44:                                               ; preds = %40
  store i32 -1, ptr %2, align 4, !tbaa !5
  br label %45

45:                                               ; preds = %44, %40
  %46 = load i32, ptr %2, align 4, !tbaa !5
  call void @_Z2trIiJEEvT_DpRKT0_(i32 noundef %46)
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  ret i32 0
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNKSt3mapIiiSt4lessIiESaISt4pairIKiiEEE5countERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) #3 align 2

; 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)) #4

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) #3 align 2

; 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
declare dso_local void @_Z2trIiJEEvT_DpRKT0_(i32 noundef) #3

attributes #0 = { mustprogress norecurse 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 = { "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 = { 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 #4 = { 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 #5 = { 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::map" = type { %"class.std::_Rb_tree" }
%"class.std::_Rb_tree" = type { %"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" }
%"struct.std::_Rb_tree<int, std::pair<const int, int>, std::_Select1st<std::pair<const int, int>>, std::less<int>>::_Rb_tree_impl" = type { [8 x i8], %"struct.std::_Rb_tree_header" }
%"struct.std::_Rb_tree_header" = type { %"struct.std::_Rb_tree_node_base", i64 }
%"struct.std::_Rb_tree_node_base" = type { i32, ptr, ptr, ptr }

@n = external dso_local global i32, align 4
@a = external dso_local global [1100 x i32], align 16
@m = external dso_local global %"class.std::map", align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  store i32 1000000000, ptr %1, align 4, !tbaa !5
  %3 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n)
  %4 = load i32, ptr @n, align 4, !tbaa !5
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.lr.ph, label %._crit_edge.thread

._crit_edge:                                      ; preds = %17
  %.pre = load i32, ptr %1, align 4, !tbaa !5
  %6 = icmp eq i32 %.pre, 1000000000
  br i1 %6, label %._crit_edge.thread, label %22

.lr.ph:                                           ; preds = %0, %17
  %indvars.iv = phi i64 [ %indvars.iv.next, %17 ], [ 0, %0 ]
  %7 = getelementptr inbounds [1100 x i32], ptr @a, i64 0, i64 %indvars.iv
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %7)
  %9 = call noundef i64 @_ZNKSt3mapIiiSt4lessIiESaISt4pairIKiiEEE5countERS3_(ptr noundef nonnull align 8 dereferenceable(48) @m, ptr noundef nonnull align 4 dereferenceable(4) %7)
  %.not = icmp eq i64 %9, 0
  br i1 %.not, label %.lr.ph._crit_edge, label %10

.lr.ph._crit_edge:                                ; preds = %.lr.ph
  %.pre10 = trunc nuw nsw i64 %indvars.iv to i32
  br label %17

10:                                               ; preds = %.lr.ph
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  %11 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @m, ptr noundef nonnull align 4 dereferenceable(4) %7)
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = trunc nuw nsw i64 %indvars.iv to i32
  %14 = sub nsw i32 %13, %12
  store i32 %14, ptr %2, align 4, !tbaa !5
  %15 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %1, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %16 = load i32, ptr %15, align 4, !tbaa !5
  store i32 %16, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  br label %17

17:                                               ; preds = %.lr.ph._crit_edge, %10
  %.pre-phi = phi i32 [ %.pre10, %.lr.ph._crit_edge ], [ %13, %10 ]
  %18 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48) @m, ptr noundef nonnull align 4 dereferenceable(4) %7)
  store i32 %.pre-phi, ptr %18, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %19 = load i32, ptr @n, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = icmp slt i64 %indvars.iv.next, %20
  br i1 %21, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge.thread:                               ; preds = %0, %._crit_edge
  store i32 -1, ptr %1, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %._crit_edge.thread, %._crit_edge
  %23 = phi i32 [ -1, %._crit_edge.thread ], [ %.pre, %._crit_edge ]
  call void @_Z2trIiJEEvT_DpRKT0_(i32 noundef %23)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  ret i32 0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_ZNKSt3mapIiiSt4lessIiESaISt4pairIKiiEEE5countERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #3 align 2

; 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 #4

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt3mapIiiSt4lessIiESaISt4pairIKiiEEEixERS3_(ptr noundef nonnull align 8 dereferenceable(48), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z2trIiJEEvT_DpRKT0_(i32 noundef) local_unnamed_addr #3

attributes #0 = { mustprogress norecurse 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nofree nounwind "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 = { 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 #4 = { 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 #5 = { 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: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass