; LLVM IR from bqi343/cp-notebook :: Contests/USACO Solutions/2016-17/Jan 2017/Gold/17 Jan G3.ll (Z6unpacki)

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

; 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) #0

; Function Attrs: mustprogress uwtable
define dso_local { i64, i32 } @_Z6unpacki(i32 noundef %0) #1 {
  %2 = alloca %"struct.std::pair", align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca %"struct.std::pair.0", align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca { i64, i32 }, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = sdiv i32 %10, 400
  store i32 %11, ptr %4, align 4, !tbaa !5
  %12 = load i32, ptr %3, align 4, !tbaa !5
  %13 = srem i32 %12, 400
  store i32 %13, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = sdiv i32 %14, 20
  store i32 %15, 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
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = sdiv i32 %16, 20
  store i32 %17, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = srem i32 %18, 20
  store i32 %19, 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 @_ZNSt4pairIiS_IiiEEC2IiS0_TnNSt9enable_ifIXaaclsr5_PCCPE18_ConstructiblePairIT_T0_EEclsr5_PCCPE26_ImplicitlyConvertiblePairIS4_S5_EEEbE4typeELb1EEERKiRKS0_(ptr noundef nonnull align 4 dereferenceable(12) %2, ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(8) %6)
  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.end.p0(i64 8, 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.memcpy.p0.p0.i64(ptr align 8 %9, ptr align 4 %2, i64 12, i1 false)
  %20 = load { i64, i32 }, ptr %9, align 8
  ret { i64, i32 } %20
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; 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 #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiS_IiiEEC2IiS0_TnNSt9enable_ifIXaaclsr5_PCCPE18_ConstructiblePairIT_T0_EEclsr5_PCCPE26_ImplicitlyConvertiblePairIS4_S5_EEEbE4typeELb1EEERKiRKS0_(ptr noundef nonnull align 4 dereferenceable(12), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(8)) unnamed_addr #3 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

attributes #0 = { nocallback nofree 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 #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"}


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

; Function Attrs: mustprogress nounwind uwtable
define dso_local { i64, i32 } @_Z6unpacki(i32 noundef %0) local_unnamed_addr #0 {
  %2 = alloca %"struct.std::pair", align 8
  %3 = alloca i32, align 4
  %4 = alloca %"struct.std::pair.0", align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #2
  %7 = sdiv i32 %0, 400
  store i32 %7, ptr %3, align 4, !tbaa !5
  %8 = srem i32 %0, 400
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #2
  %.lhs.trunc = trunc nsw i32 %8 to i16
  %9 = sdiv i16 %.lhs.trunc, 20
  %.sext = sext i16 %9 to i32
  store i32 %.sext, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %6) #2
  %10 = srem i16 %.lhs.trunc, 20
  %.sext6 = sext i16 %10 to i32
  store i32 %.sext6, ptr %6, align 4, !tbaa !5
  call void @_ZNSt4pairIiiEC2IiiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS3_S4_EEEbE4typeELb1EEEOS3_OS4_(ptr noundef nonnull align 4 dereferenceable(8) %4, ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %6)
  call void @_ZNSt4pairIiS_IiiEEC2IiS0_TnNSt9enable_ifIXaaclsr5_PCCPE18_ConstructiblePairIT_T0_EEclsr5_PCCPE26_ImplicitlyConvertiblePairIS4_S5_EEEbE4typeELb1EEERKiRKS0_(ptr noundef nonnull align 4 dereferenceable(12) %2, ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(8) %4)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #2
  %.sroa.0.0.copyload = load i64, ptr %2, align 8
  %.sroa.2.0..sroa_idx = getelementptr inbounds i8, ptr %2, i64 8
  %.sroa.2.0.copyload = load i32, ptr %.sroa.2.0..sroa_idx, align 8
  %.fca.0.insert = insertvalue { i64, i32 } poison, i64 %.sroa.0.0.copyload, 0
  %.fca.1.insert = insertvalue { i64, i32 } %.fca.0.insert, i32 %.sroa.2.0.copyload, 1
  ret { i64, i32 } %.fca.1.insert
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #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 #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiS_IiiEEC2IiS0_TnNSt9enable_ifIXaaclsr5_PCCPE18_ConstructiblePairIT_T0_EEclsr5_PCCPE26_ImplicitlyConvertiblePairIS4_S5_EEEbE4typeELb1EEERKiRKS0_(ptr noundef nonnull align 4 dereferenceable(12), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(8)) unnamed_addr #0 align 2

; 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 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass