; LLVM IR from tangjz/acm-icpc :: codeforces/complete/756F.ll (Z3powSt4pairIiiEi)

; 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 { i32, i32 }

; 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 uwtable
declare dso_local i64 @_Z5mergeSt4pairIiiES0_(i64, i64) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiiEC2IiiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS3_OS4_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local i64 @_Z3powSt4pairIiiEi(i64 %0, i32 noundef %1) #1 {
  %3 = alloca %"struct.std::pair", align 4
  %4 = alloca %"struct.std::pair", align 4
  %5 = alloca i32, align 4
  %6 = alloca %"struct.std::pair", align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca %"struct.std::pair", align 4
  %10 = alloca i32, align 4
  %11 = alloca %"struct.std::pair", align 4
  %12 = alloca %"struct.std::pair", align 4
  %13 = alloca %"struct.std::pair", align 4
  %14 = alloca %"struct.std::pair", align 4
  %15 = alloca %"struct.std::pair", align 4
  %16 = alloca %"struct.std::pair", align 4
  %17 = alloca i32, align 4
  store i64 %0, ptr %4, align 4
  store i32 %1, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  store i32 0, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  store i32 1, ptr %8, align 4, !tbaa !5
  call void @_ZNSt4pairIiiEC2IiiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS3_OS4_(ptr noundef nonnull align 4 dereferenceable(8) %6, ptr noundef nonnull align 4 dereferenceable(4) %7, ptr noundef nonnull align 4 dereferenceable(4) %8)
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #4
  store i32 1, ptr %10, align 4, !tbaa !5
  %18 = getelementptr inbounds %"struct.std::pair", ptr %4, i32 0, i32 1
  call void @_ZNSt4pairIiiEC2IiRiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8) %9, ptr noundef nonnull align 4 dereferenceable(4) %10, ptr noundef nonnull align 4 dereferenceable(4) %18)
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #4
  br label %19

19:                                               ; preds = %32, %2
  %20 = load i32, ptr %5, align 4, !tbaa !5
  %21 = icmp sgt i32 %20, 0
  br i1 %21, label %22, label %39

22:                                               ; preds = %19
  %23 = load i32, ptr %5, align 4, !tbaa !5
  %24 = and i32 %23, 1
  %25 = icmp ne i32 %24, 0
  br i1 %25, label %26, label %31

26:                                               ; preds = %22
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %12, ptr align 4 %6, i64 8, i1 false)
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %13, ptr align 4 %9, i64 8, i1 false)
  %27 = load i64, ptr %12, align 4
  %28 = load i64, ptr %13, align 4
  %29 = call i64 @_Z5mergeSt4pairIiiES0_(i64 %27, i64 %28)
  store i64 %29, ptr %11, align 4
  %30 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt4pairIiiEaSEOS0_(ptr noundef nonnull align 4 dereferenceable(8) %6, ptr noundef nonnull align 4 dereferenceable(8) %11) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #4
  br label %31

31:                                               ; preds = %26, %22
  br label %32

32:                                               ; preds = %31
  %33 = load i32, ptr %5, align 4, !tbaa !5
  %34 = ashr i32 %33, 1
  store i32 %34, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %14) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %15, ptr align 4 %9, i64 8, i1 false)
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %16, ptr align 4 %9, i64 8, i1 false)
  %35 = load i64, ptr %15, align 4
  %36 = load i64, ptr %16, align 4
  %37 = call i64 @_Z5mergeSt4pairIiiES0_(i64 %35, i64 %36)
  store i64 %37, ptr %14, align 4
  %38 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt4pairIiiEaSEOS0_(ptr noundef nonnull align 4 dereferenceable(8) %9, ptr noundef nonnull align 4 dereferenceable(8) %14) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %14) #4
  br label %19, !llvm.loop !9

39:                                               ; preds = %19
  call void @llvm.lifetime.start.p0(i64 4, ptr %17) #4
  %40 = getelementptr inbounds %"struct.std::pair", ptr %4, i32 0, i32 0
  %41 = load i32, ptr %40, align 4, !tbaa !11
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds %"struct.std::pair", ptr %6, i32 0, i32 0
  %44 = load i32, ptr %43, align 4, !tbaa !11
  %45 = sext i32 %44 to i64
  %46 = mul nsw i64 %42, %45
  %47 = srem i64 %46, 1000000007
  %48 = trunc i64 %47 to i32
  store i32 %48, ptr %17, align 4, !tbaa !5
  %49 = getelementptr inbounds %"struct.std::pair", ptr %6, i32 0, i32 1
  call void @_ZNSt4pairIiiEC2IiRiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8) %3, ptr noundef nonnull align 4 dereferenceable(4) %17, ptr noundef nonnull align 4 dereferenceable(4) %49)
  call void @llvm.lifetime.end.p0(i64 4, ptr %17) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  %50 = load i64, ptr %3, align 4
  ret i64 %50
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiiEC2IiRiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #2 align 2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt4pairIiiEaSEOS0_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(8)) #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 nounwind willreturn memory(argmem: readwrite) }
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"}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTSSt4pairIiiE", !6, i64 0, !6, i64 4}


; 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 { i32, i32 }

; 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 uwtable
declare dso_local i64 @_Z5mergeSt4pairIiiES0_(i64, i64) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiiEC2IiiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS3_OS4_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local i64 @_Z3powSt4pairIiiEi(i64 %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = alloca %"struct.std::pair", align 8
  %4 = alloca %"struct.std::pair", align 8
  %5 = alloca %"struct.std::pair", align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca %"struct.std::pair", align 8
  %9 = alloca i32, align 4
  %10 = alloca %"struct.std::pair", align 8
  %11 = alloca %"struct.std::pair", align 8
  %12 = alloca i32, align 4
  store i64 %0, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %6) #3
  store i32 0, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %7) #3
  store i32 1, ptr %7, align 4, !tbaa !5
  call void @_ZNSt4pairIiiEC2IiiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS3_OS4_(ptr noundef nonnull align 4 dereferenceable(8) %5, ptr noundef nonnull align 4 dereferenceable(4) %6, ptr noundef nonnull align 4 dereferenceable(4) %7)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %6) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %8) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %9) #3
  store i32 1, ptr %9, align 4, !tbaa !5
  %13 = getelementptr inbounds i8, ptr %4, i64 4
  call void @_ZNSt4pairIiiEC2IiRiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8) %8, ptr noundef nonnull align 4 dereferenceable(4) %9, ptr noundef nonnull align 4 dereferenceable(4) %13)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %9) #3
  %14 = icmp sgt i32 %1, 0
  br i1 %14, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %19
  %.06 = phi i32 [ %20, %19 ], [ %1, %2 ]
  %15 = and i32 %.06, 1
  %.not = icmp eq i32 %15, 0
  br i1 %.not, label %19, label %16

16:                                               ; preds = %.lr.ph
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %10) #3
  %.sroa.03.0.copyload = load i64, ptr %5, align 8
  %.sroa.02.0.copyload = load i64, ptr %8, align 8
  %17 = call i64 @_Z5mergeSt4pairIiiES0_(i64 %.sroa.03.0.copyload, i64 %.sroa.02.0.copyload)
  store i64 %17, ptr %10, align 8
  %18 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt4pairIiiEaSEOS0_(ptr noundef nonnull align 4 dereferenceable(8) %5, ptr noundef nonnull align 4 dereferenceable(8) %10) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %10) #3
  br label %19

19:                                               ; preds = %.lr.ph, %16
  %20 = lshr i32 %.06, 1
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %11) #3
  %.sroa.01.0.copyload = load i64, ptr %8, align 8
  %21 = call i64 @_Z5mergeSt4pairIiiES0_(i64 %.sroa.01.0.copyload, i64 %.sroa.01.0.copyload)
  store i64 %21, ptr %11, align 8
  %22 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt4pairIiiEaSEOS0_(ptr noundef nonnull align 4 dereferenceable(8) %8, ptr noundef nonnull align 4 dereferenceable(8) %11) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %11) #3
  %.not7 = icmp ult i32 %.06, 2
  br i1 %.not7, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %19, %2
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %12) #3
  %23 = load i32, ptr %4, align 8, !tbaa !11
  %24 = sext i32 %23 to i64
  %25 = load i32, ptr %5, align 8, !tbaa !11
  %26 = sext i32 %25 to i64
  %27 = mul nsw i64 %26, %24
  %28 = srem i64 %27, 1000000007
  %29 = trunc nsw i64 %28 to i32
  store i32 %29, ptr %12, align 4, !tbaa !5
  %30 = getelementptr inbounds i8, ptr %5, i64 4
  call void @_ZNSt4pairIiiEC2IiRiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8) %3, ptr noundef nonnull align 4 dereferenceable(4) %12, ptr noundef nonnull align 4 dereferenceable(4) %30)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %12) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #3
  %31 = load i64, ptr %3, align 8
  ret i64 %31
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiiEC2IiRiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt4pairIiiEaSEOS0_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #2 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 = { 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"}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTSSt4pairIiiE", !6, i64 0, !6, i64 4}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass