; LLVM IR from brpapa/algorithms :: solutions/uva/10261.ll (Z7recoveri)

; 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_ostream" = type { ptr, %"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 }

@cars = external dso_local global [202 x i32], align 16
@C = external dso_local global i32, align 4
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [10 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z2dpiii(i32 noundef, i32 noundef, i32 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 @_Z7recoveri(i32 noundef %0) #0 {
  %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
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  %9 = load i32, ptr %2, align 4, !tbaa !5
  store i32 %9, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %10 = load i32, ptr %2, align 4, !tbaa !5
  store i32 %10, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %85, %1
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = load i32, ptr @C, align 4, !tbaa !5
  %14 = icmp slt i32 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  store i32 2, ptr %6, align 4
  br label %88

16:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 -1, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store i32 -1, ptr %8, align 4, !tbaa !5
  %17 = load i32, ptr %3, align 4, !tbaa !5
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [202 x i32], ptr @cars, i64 0, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !5
  %22 = icmp sge i32 %17, %21
  br i1 %22, label %23, label %34

23:                                               ; preds = %16
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = add nsw i32 %24, 1
  %26 = load i32, ptr %3, align 4, !tbaa !5
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [202 x i32], ptr @cars, i64 0, i64 %28
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = sub nsw i32 %26, %30
  %32 = load i32, ptr %4, align 4, !tbaa !5
  %33 = call noundef i32 @_Z2dpiii(i32 noundef %25, i32 noundef %31, i32 noundef %32)
  store i32 %33, ptr %7, align 4, !tbaa !5
  br label %34

34:                                               ; preds = %23, %16
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = load i32, ptr %5, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds [202 x i32], ptr @cars, i64 0, i64 %37
  %39 = load i32, ptr %38, align 4, !tbaa !5
  %40 = icmp sge i32 %35, %39
  br i1 %40, label %41, label %52

41:                                               ; preds = %34
  %42 = load i32, ptr %5, align 4, !tbaa !5
  %43 = add nsw i32 %42, 1
  %44 = load i32, ptr %3, align 4, !tbaa !5
  %45 = load i32, ptr %4, align 4, !tbaa !5
  %46 = load i32, ptr %5, align 4, !tbaa !5
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds [202 x i32], ptr @cars, i64 0, i64 %47
  %49 = load i32, ptr %48, align 4, !tbaa !5
  %50 = sub nsw i32 %45, %49
  %51 = call noundef i32 @_Z2dpiii(i32 noundef %43, i32 noundef %44, i32 noundef %50)
  store i32 %51, ptr %8, align 4, !tbaa !5
  br label %52

52:                                               ; preds = %41, %34
  %53 = load i32, ptr %7, align 4, !tbaa !5
  %54 = icmp eq i32 %53, -1
  br i1 %54, label %55, label %59

55:                                               ; preds = %52
  %56 = load i32, ptr %8, align 4, !tbaa !5
  %57 = icmp eq i32 %56, -1
  br i1 %57, label %58, label %59

58:                                               ; preds = %55
  store i32 2, ptr %6, align 4
  br label %82

59:                                               ; preds = %55, %52
  %60 = load i32, ptr %7, align 4, !tbaa !5
  %61 = load i32, ptr %8, align 4, !tbaa !5
  %62 = icmp sge i32 %60, %61
  br i1 %62, label %63, label %72

63:                                               ; preds = %59
  %64 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str)
  %65 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %64, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  %66 = load i32, ptr %5, align 4, !tbaa !5
  %67 = sext i32 %66 to i64
  %68 = getelementptr inbounds [202 x i32], ptr @cars, i64 0, i64 %67
  %69 = load i32, ptr %68, align 4, !tbaa !5
  %70 = load i32, ptr %3, align 4, !tbaa !5
  %71 = sub nsw i32 %70, %69
  store i32 %71, ptr %3, align 4, !tbaa !5
  br label %81

72:                                               ; preds = %59
  %73 = 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)
  %74 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %73, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  %75 = load i32, ptr %5, align 4, !tbaa !5
  %76 = sext i32 %75 to i64
  %77 = getelementptr inbounds [202 x i32], ptr @cars, i64 0, i64 %76
  %78 = load i32, ptr %77, align 4, !tbaa !5
  %79 = load i32, ptr %4, align 4, !tbaa !5
  %80 = sub nsw i32 %79, %78
  store i32 %80, ptr %4, align 4, !tbaa !5
  br label %81

81:                                               ; preds = %72, %63
  store i32 0, ptr %6, align 4
  br label %82

82:                                               ; preds = %81, %58
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  %83 = load i32, ptr %6, align 4
  switch i32 %83, label %88 [
    i32 0, label %84
  ]

84:                                               ; preds = %82
  br label %85

85:                                               ; preds = %84
  %86 = load i32, ptr %5, align 4, !tbaa !5
  %87 = add nsw i32 %86, 1
  store i32 %87, ptr %5, align 4, !tbaa !5
  br label %11, !llvm.loop !9

88:                                               ; preds = %82, %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %89

89:                                               ; preds = %88
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  ret void
}

; 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) #2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #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 = 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::basic_ostream" = type { ptr, %"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 }

@cars = external dso_local local_unnamed_addr global [202 x i32], align 16
@C = external dso_local local_unnamed_addr global i32, align 4
@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [10 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z2dpiii(i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z7recoveri(i32 noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr @C, align 4, !tbaa !5
  %3 = icmp sgt i32 %2, 0
  br i1 %3, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1, %31
  %indvars.iv = phi i64 [ %indvars.iv.next, %31 ], [ 0, %1 ]
  %.02942 = phi i32 [ %.2.ph, %31 ], [ %0, %1 ]
  %.03041 = phi i32 [ %.232.ph, %31 ], [ %0, %1 ]
  %4 = getelementptr inbounds [202 x i32], ptr @cars, i64 0, i64 %indvars.iv
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %.not = icmp slt i32 %.03041, %5
  br i1 %.not, label %11, label %6

6:                                                ; preds = %.lr.ph
  %7 = sub nsw i32 %.03041, %5
  %8 = trunc i64 %indvars.iv to i32
  %9 = add i32 %8, 1
  %10 = tail call noundef i32 @_Z2dpiii(i32 noundef %9, i32 noundef %7, i32 noundef %.02942)
  %.pre = load i32, ptr %4, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %6, %.lr.ph
  %12 = phi i32 [ %.pre, %6 ], [ %5, %.lr.ph ]
  %.026 = phi i32 [ %10, %6 ], [ -1, %.lr.ph ]
  %.not35 = icmp slt i32 %.02942, %12
  br i1 %.not35, label %18, label %13

13:                                               ; preds = %11
  %14 = sub nsw i32 %.02942, %12
  %15 = trunc i64 %indvars.iv to i32
  %16 = add i32 %15, 1
  %17 = tail call noundef i32 @_Z2dpiii(i32 noundef %16, i32 noundef %.03041, i32 noundef %14)
  br label %18

18:                                               ; preds = %13, %11
  %.0 = phi i32 [ %17, %13 ], [ -1, %11 ]
  %19 = and i32 %.0, %.026
  %or.cond.not = icmp eq i32 %19, -1
  br i1 %or.cond.not, label %._crit_edge, label %20

20:                                               ; preds = %18
  %.not36 = icmp slt i32 %.026, %.0
  br i1 %.not36, label %26, label %21

21:                                               ; preds = %20
  %22 = tail 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)
  %23 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %22, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = sub nsw i32 %.03041, %24
  br label %31

26:                                               ; preds = %20
  %27 = tail 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)
  %28 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %27, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = sub nsw i32 %.02942, %29
  br label %31

31:                                               ; preds = %21, %26
  %.232.ph = phi i32 [ %.03041, %26 ], [ %25, %21 ]
  %.2.ph = phi i32 [ %30, %26 ], [ %.02942, %21 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %32 = load i32, ptr @C, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = icmp slt i64 %indvars.iv.next, %33
  br i1 %34, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %31, %18, %1
  ret void
}

; 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 #1

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #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,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass