; LLVM IR from VastoLorde95/Competitive-Programming :: Hackerrank/Codesprints 2016/Codesprint April/Problem H/H.ll (Z3fibx)

; 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"

%"struct.std::pair" = type { i64, i64 }
%"struct.std::pair.0" = type { i32, i32 }

@ma = external dso_local global [2 x [2 x i64]], align 16

; 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 void @_Z4fastx(i64 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local { i64, i64 } @_Z3fibx(i64 noundef %0) #2 {
  %2 = alloca %"struct.std::pair", align 8
  %3 = alloca i64, align 8
  %4 = alloca %"struct.std::pair.0", align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca %"struct.std::pair.0", align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = add nsw i64 %10, -1
  store i64 %11, ptr %3, align 8, !tbaa !5
  %12 = load i64, ptr %3, align 8, !tbaa !5
  %13 = icmp eq i64 %12, 0
  br i1 %13, label %14, label %16

14:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !9
  %15 = call i64 @_ZSt9make_pairIiiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS1_INS2_IT0_E4typeEE6__typeEEOS3_OS8_(ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %6)
  store i64 %15, ptr %4, align 4
  call void @_ZNSt4pairIxxEC2IiiTnNSt9enable_ifIXaaclsr6_PCCFPIT_T0_EE22_MoveConstructiblePairIS3_S4_EEclsr6_PCCFPIS3_S4_EE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS_IS3_S4_E(ptr noundef nonnull align 8 dereferenceable(16) %2, ptr noundef nonnull align 4 dereferenceable(8) %4)
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %28

16:                                               ; preds = %1
  %17 = load i64, ptr %3, align 8, !tbaa !5
  %18 = icmp eq i64 %17, 1
  br i1 %18, label %19, label %21

19:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store i32 1, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  store i32 1, ptr %9, align 4, !tbaa !9
  %20 = call i64 @_ZSt9make_pairIiiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS1_INS2_IT0_E4typeEE6__typeEEOS3_OS8_(ptr noundef nonnull align 4 dereferenceable(4) %8, ptr noundef nonnull align 4 dereferenceable(4) %9)
  store i64 %20, ptr %7, align 4
  call void @_ZNSt4pairIxxEC2IiiTnNSt9enable_ifIXaaclsr6_PCCFPIT_T0_EE22_MoveConstructiblePairIS3_S4_EEclsr6_PCCFPIS3_S4_EE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS_IS3_S4_E(ptr noundef nonnull align 8 dereferenceable(16) %2, ptr noundef nonnull align 4 dereferenceable(8) %7)
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %28

21:                                               ; preds = %16
  store i64 1, ptr @ma, align 16, !tbaa !5
  store i64 1, ptr getelementptr inbounds ([2 x i64], ptr @ma, i64 0, i64 1), align 8, !tbaa !5
  store i64 1, ptr getelementptr inbounds ([2 x [2 x i64]], ptr @ma, i64 0, i64 1), align 16, !tbaa !5
  store i64 0, ptr getelementptr inbounds ([2 x i64], ptr getelementptr inbounds ([2 x [2 x i64]], ptr @ma, i64 0, i64 1), i64 0, i64 1), align 8, !tbaa !5
  %22 = load i64, ptr %3, align 8, !tbaa !5
  call void @_Z4fastx(i64 noundef %22)
  %23 = call { i64, i64 } @_ZSt9make_pairIRxS0_ESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 8 dereferenceable(8) @ma, ptr noundef nonnull align 8 dereferenceable(8) getelementptr inbounds ([2 x i64], ptr @ma, i64 0, i64 1))
  %24 = getelementptr inbounds { i64, i64 }, ptr %2, i32 0, i32 0
  %25 = extractvalue { i64, i64 } %23, 0
  store i64 %25, ptr %24, align 8
  %26 = getelementptr inbounds { i64, i64 }, ptr %2, i32 0, i32 1
  %27 = extractvalue { i64, i64 } %23, 1
  store i64 %27, ptr %26, align 8
  br label %28

28:                                               ; preds = %21, %19, %14
  %29 = load { i64, i64 }, ptr %2, align 8
  ret { i64, i64 } %29
}

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZSt9make_pairIiiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS1_INS2_IT0_E4typeEE6__typeEEOS3_OS8_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIxxEC2IiiTnNSt9enable_ifIXaaclsr6_PCCFPIT_T0_EE22_MoveConstructiblePairIS3_S4_EEclsr6_PCCFPIS3_S4_EE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS_IS3_S4_E(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(8)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local { i64, i64 } @_ZSt9make_pairIRxS0_ESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2

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 = { 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}


; 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"

%"struct.std::pair" = type { i64, i64 }
%"struct.std::pair.0" = type { i32, i32 }

@ma = external dso_local global [2 x [2 x i64]], align 16

; 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 void @_Z4fastx(i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local { i64, i64 } @_Z3fibx(i64 noundef %0) local_unnamed_addr #2 {
  %2 = alloca %"struct.std::pair", align 8
  %3 = alloca %"struct.std::pair.0", align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca %"struct.std::pair.0", align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  switch i64 %0, label %13 [
    i64 1, label %9
    i64 2, label %11
  ]

9:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  store i32 1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #3
  store i32 0, ptr %5, align 4, !tbaa !5
  %10 = call i64 @_ZSt9make_pairIiiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS1_INS2_IT0_E4typeEE6__typeEEOS3_OS8_(ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(4) %5)
  store i64 %10, ptr %3, align 8
  call void @_ZNSt4pairIxxEC2IiiTnNSt9enable_ifIXaaclsr6_PCCFPIT_T0_EE22_MoveConstructiblePairIS3_S4_EEclsr6_PCCFPIS3_S4_EE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS_IS3_S4_E(ptr noundef nonnull align 8 dereferenceable(16) %2, ptr noundef nonnull align 4 dereferenceable(8) %3)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  br label %19

11:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %6) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %7) #3
  store i32 1, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %8) #3
  store i32 1, ptr %8, align 4, !tbaa !5
  %12 = call i64 @_ZSt9make_pairIiiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS1_INS2_IT0_E4typeEE6__typeEEOS3_OS8_(ptr noundef nonnull align 4 dereferenceable(4) %7, ptr noundef nonnull align 4 dereferenceable(4) %8)
  store i64 %12, ptr %6, align 8
  call void @_ZNSt4pairIxxEC2IiiTnNSt9enable_ifIXaaclsr6_PCCFPIT_T0_EE22_MoveConstructiblePairIS3_S4_EEclsr6_PCCFPIS3_S4_EE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS_IS3_S4_E(ptr noundef nonnull align 8 dereferenceable(16) %2, ptr noundef nonnull align 4 dereferenceable(8) %6)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %6) #3
  br label %19

13:                                               ; preds = %1
  %14 = add nsw i64 %0, -1
  store i64 1, ptr @ma, align 16, !tbaa !9
  store i64 1, ptr getelementptr inbounds (i8, ptr @ma, i64 8), align 8, !tbaa !9
  store i64 1, ptr getelementptr inbounds (i8, ptr @ma, i64 16), align 16, !tbaa !9
  store i64 0, ptr getelementptr inbounds (i8, ptr @ma, i64 24), align 8, !tbaa !9
  tail call void @_Z4fastx(i64 noundef %14)
  %15 = tail call { i64, i64 } @_ZSt9make_pairIRxS0_ESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 8 dereferenceable(8) @ma, ptr noundef nonnull align 8 dereferenceable(8) getelementptr inbounds (i8, ptr @ma, i64 8))
  %16 = extractvalue { i64, i64 } %15, 0
  store i64 %16, ptr %2, align 8
  %17 = getelementptr inbounds i8, ptr %2, i64 8
  %18 = extractvalue { i64, i64 } %15, 1
  store i64 %18, ptr %17, align 8
  br label %19

19:                                               ; preds = %13, %11, %9
  %.fca.0.load = load i64, ptr %2, align 8
  %.fca.0.insert = insertvalue { i64, i64 } poison, i64 %.fca.0.load, 0
  %.fca.1.gep = getelementptr inbounds i8, ptr %2, i64 8
  %.fca.1.load = load i64, ptr %.fca.1.gep, align 8
  %.fca.1.insert = insertvalue { i64, i64 } %.fca.0.insert, i64 %.fca.1.load, 1
  ret { i64, i64 } %.fca.1.insert
}

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZSt9make_pairIiiESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS1_INS2_IT0_E4typeEE6__typeEEOS3_OS8_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIxxEC2IiiTnNSt9enable_ifIXaaclsr6_PCCFPIT_T0_EE22_MoveConstructiblePairIS3_S4_EEclsr6_PCCFPIS3_S4_EE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS_IS3_S4_E(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(8)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local { i64, i64 } @_ZSt9make_pairIRxS0_ESt4pairINSt25__strip_reference_wrapperINSt5decayIT_E4typeEE6__typeENS2_INS3_IT0_E4typeEE6__typeEEOS4_OS9_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

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 = { 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 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass