; LLVM IR from AnneLivia/Competitive-Programming :: Online Judges/URI/Fuga com helicoptero - OBI - 2016 (main)

; 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::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = 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
  %5 = alloca i32, align 4
  %6 = alloca i8, align 1
  %7 = alloca i8, align 1
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #4
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #4
  store i8 0, ptr %6, align 1, !tbaa !5
  store i8 0, ptr %7, align 1, !tbaa !5
  %8 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %9 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %8, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %10 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %9, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %11 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %10, ptr noundef nonnull align 4 dereferenceable(4) %5)
  br label %12

12:                                               ; preds = %47, %0
  br label %13

13:                                               ; preds = %12
  %14 = load i32, ptr %5, align 4, !tbaa !9
  %15 = icmp eq i32 %14, -1
  br i1 %15, label %16, label %23

16:                                               ; preds = %13
  %17 = load i32, ptr %3, align 4, !tbaa !9
  %18 = add nsw i32 %17, -1
  store i32 %18, ptr %3, align 4, !tbaa !9
  %19 = load i32, ptr %3, align 4, !tbaa !9
  %20 = icmp eq i32 %19, -1
  br i1 %20, label %21, label %22

21:                                               ; preds = %16
  store i32 15, ptr %3, align 4, !tbaa !9
  br label %22

22:                                               ; preds = %21, %16
  br label %30

23:                                               ; preds = %13
  %24 = load i32, ptr %3, align 4, !tbaa !9
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %3, align 4, !tbaa !9
  %26 = load i32, ptr %3, align 4, !tbaa !9
  %27 = icmp eq i32 %26, 16
  br i1 %27, label %28, label %29

28:                                               ; preds = %23
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %29

29:                                               ; preds = %28, %23
  br label %30

30:                                               ; preds = %29, %22
  %31 = load i32, ptr %3, align 4, !tbaa !9
  %32 = load i32, ptr %4, align 4, !tbaa !9
  %33 = icmp eq i32 %31, %32
  br i1 %33, label %34, label %35

34:                                               ; preds = %30
  store i8 1, ptr %6, align 1, !tbaa !5
  br label %35

35:                                               ; preds = %34, %30
  %36 = load i32, ptr %3, align 4, !tbaa !9
  %37 = load i32, ptr %2, align 4, !tbaa !9
  %38 = icmp eq i32 %36, %37
  br i1 %38, label %39, label %40

39:                                               ; preds = %35
  store i8 1, ptr %7, align 1, !tbaa !5
  br label %40

40:                                               ; preds = %39, %35
  %41 = load i8, ptr %6, align 1, !tbaa !5, !range !11, !noundef !12
  %42 = trunc i8 %41 to i1
  br i1 %42, label %46, label %43

43:                                               ; preds = %40
  %44 = load i8, ptr %7, align 1, !tbaa !5, !range !11, !noundef !12
  %45 = trunc i8 %44 to i1
  br i1 %45, label %46, label %47

46:                                               ; preds = %43, %40
  br label %48

47:                                               ; preds = %43
  br label %12, !llvm.loop !13

48:                                               ; preds = %46
  %49 = load i8, ptr %6, align 1, !tbaa !5, !range !11, !noundef !12
  %50 = trunc i8 %49 to i1
  br i1 %50, label %51, label %56

51:                                               ; preds = %48
  %52 = load i8, ptr %7, align 1, !tbaa !5, !range !11, !noundef !12
  %53 = trunc i8 %52 to i1
  br i1 %53, label %56, label %54

54:                                               ; preds = %51
  %55 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str)
  br label %58

56:                                               ; preds = %51, %48
  %57 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.1)
  br label %58

58:                                               ; preds = %56, %54
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  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 noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #3

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

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 = { 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 #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 = !{!"bool", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}
!13 = distinct !{!13, !14}
!14 = !{!"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::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = 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
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #4
  %5 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %6 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %5, ptr noundef nonnull align 4 dereferenceable(4) %1)
  %7 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %6, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %8 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %7, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = icmp eq i32 %9, -1
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = load i32, ptr %1, align 4, !tbaa !5
  %.promoted = load i32, ptr %2, align 4
  br i1 %10, label %.split.us, label %.split

.split.us:                                        ; preds = %0, %17
  %storemerge8.us = phi i32 [ %spec.store.select.us, %17 ], [ %.promoted, %0 ]
  %.0.us = phi i8 [ %.1.us, %17 ], [ 0, %0 ]
  %13 = add nsw i32 %storemerge8.us, -1
  %14 = icmp eq i32 %storemerge8.us, 0
  %spec.store.select.us = select i1 %14, i32 15, i32 %13
  %15 = icmp eq i32 %spec.store.select.us, %11
  %16 = icmp eq i32 %spec.store.select.us, %12
  %.1.us = select i1 %16, i8 1, i8 %.0.us
  br i1 %15, label %.critedge, label %17

17:                                               ; preds = %.split.us
  %18 = trunc nuw i8 %.1.us to i1
  br i1 %18, label %.loopexit, label %.split.us, !llvm.loop !9

.split:                                           ; preds = %0, %23
  %storemerge8 = phi i32 [ %spec.store.select1, %23 ], [ %.promoted, %0 ]
  %.0 = phi i8 [ %.1, %23 ], [ 0, %0 ]
  %19 = add nsw i32 %storemerge8, 1
  %20 = icmp eq i32 %19, 16
  %spec.store.select1 = select i1 %20, i32 0, i32 %19
  %21 = icmp eq i32 %spec.store.select1, %11
  %22 = icmp eq i32 %spec.store.select1, %12
  %.1 = select i1 %22, i8 1, i8 %.0
  br i1 %21, label %.critedge, label %23

23:                                               ; preds = %.split
  %24 = trunc nuw i8 %.1 to i1
  br i1 %24, label %.loopexit, label %.split, !llvm.loop !9

.critedge:                                        ; preds = %.split, %.split.us
  %.us-phi10 = phi i8 [ %.1.us, %.split.us ], [ %.1, %.split ]
  store i32 %11, ptr %2, align 4
  %25 = trunc nuw i8 %.us-phi10 to i1
  br i1 %25, label %26, label %27

.loopexit:                                        ; preds = %23, %17
  %.us-phi11 = phi i32 [ %spec.store.select.us, %17 ], [ %spec.store.select1, %23 ]
  store i32 %.us-phi11, ptr %2, align 4
  br label %26

26:                                               ; preds = %.loopexit, %.critedge
  br label %27

27:                                               ; preds = %.critedge, %26
  %.str.1.sink = phi ptr [ @.str.1, %26 ], [ @.str, %.critedge ]
  %28 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull %.str.1.sink)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  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

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #3

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

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 = { "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 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"}


; Effective O3 passes: AggressiveInstCombinePass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass