; LLVM IR from VastoLorde95/Competitive-Programming :: SPOJ/DP Level 3/Packing Rectangles/pack.ll (Z2l6RSt4pairIiiES1_S1_S1_)

; 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::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.std::pair" = type { i32, i32 }

@MIN = external dso_local global i32, align 4
@rectangles = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z3maxii(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: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorISt4pairIiiESaIS1_EE5clearEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIiiESaIS1_EE9push_backEOS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(8)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiiEC2IRiS2_TnNSt9enable_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 #0 align 2

; 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 @_Z2l6RSt4pairIiiES1_S1_S1_(ptr noundef nonnull align 4 dereferenceable(8) %0, ptr noundef nonnull align 4 dereferenceable(8) %1, ptr noundef nonnull align 4 dereferenceable(8) %2, ptr noundef nonnull align 4 dereferenceable(8) %3) #2 {
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca %"struct.std::pair", align 4
  %12 = alloca %"struct.std::pair", align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  store ptr %3, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = getelementptr inbounds %"struct.std::pair", ptr %13, i32 0, i32 0
  %15 = load i32, ptr %14, align 4, !tbaa !9
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = getelementptr inbounds %"struct.std::pair", ptr %16, i32 0, i32 0
  %18 = load i32, ptr %17, align 4, !tbaa !9
  %19 = call noundef i32 @_Z3maxii(i32 noundef %15, i32 noundef %18)
  %20 = load ptr, ptr %7, align 8, !tbaa !5
  %21 = getelementptr inbounds %"struct.std::pair", ptr %20, i32 0, i32 0
  %22 = load i32, ptr %21, align 4, !tbaa !9
  %23 = load ptr, ptr %8, align 8, !tbaa !5
  %24 = getelementptr inbounds %"struct.std::pair", ptr %23, i32 0, i32 0
  %25 = load i32, ptr %24, align 4, !tbaa !9
  %26 = call noundef i32 @_Z3maxii(i32 noundef %22, i32 noundef %25)
  %27 = add nsw i32 %19, %26
  store i32 %27, ptr %9, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  %29 = getelementptr inbounds %"struct.std::pair", ptr %28, i32 0, i32 1
  %30 = load i32, ptr %29, align 4, !tbaa !13
  %31 = load ptr, ptr %6, align 8, !tbaa !5
  %32 = getelementptr inbounds %"struct.std::pair", ptr %31, i32 0, i32 1
  %33 = load i32, ptr %32, align 4, !tbaa !13
  %34 = add nsw i32 %30, %33
  %35 = load ptr, ptr %8, align 8, !tbaa !5
  %36 = getelementptr inbounds %"struct.std::pair", ptr %35, i32 0, i32 1
  %37 = load i32, ptr %36, align 4, !tbaa !13
  %38 = load ptr, ptr %7, align 8, !tbaa !5
  %39 = getelementptr inbounds %"struct.std::pair", ptr %38, i32 0, i32 1
  %40 = load i32, ptr %39, align 4, !tbaa !13
  %41 = add nsw i32 %37, %40
  %42 = call noundef i32 @_Z3maxii(i32 noundef %34, i32 noundef %41)
  store i32 %42, ptr %10, align 4, !tbaa !12
  %43 = load i32, ptr %9, align 4, !tbaa !12
  %44 = load i32, ptr %10, align 4, !tbaa !12
  %45 = mul nsw i32 %43, %44
  %46 = load i32, ptr @MIN, align 4, !tbaa !12
  %47 = icmp slt i32 %45, %46
  br i1 %47, label %48, label %52

48:                                               ; preds = %4
  %49 = load i32, ptr %9, align 4, !tbaa !12
  %50 = load i32, ptr %10, align 4, !tbaa !12
  %51 = mul nsw i32 %49, %50
  store i32 %51, ptr @MIN, align 4, !tbaa !12
  call void @_ZNSt6vectorISt4pairIiiESaIS1_EE5clearEv(ptr noundef nonnull align 8 dereferenceable(24) @rectangles) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #3
  call void @_ZNSt4pairIiiEC2IRiS2_TnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8) %11, ptr noundef nonnull align 4 dereferenceable(4) %9, ptr noundef nonnull align 4 dereferenceable(4) %10)
  call void @_ZNSt6vectorISt4pairIiiESaIS1_EE9push_backEOS1_(ptr noundef nonnull align 8 dereferenceable(24) @rectangles, ptr noundef nonnull align 4 dereferenceable(8) %11)
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #3
  br label %60

52:                                               ; preds = %4
  %53 = load i32, ptr %9, align 4, !tbaa !12
  %54 = load i32, ptr %10, align 4, !tbaa !12
  %55 = mul nsw i32 %53, %54
  %56 = load i32, ptr @MIN, align 4, !tbaa !12
  %57 = icmp eq i32 %55, %56
  br i1 %57, label %58, label %59

58:                                               ; preds = %52
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #3
  call void @_ZNSt4pairIiiEC2IRiS2_TnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8) %12, ptr noundef nonnull align 4 dereferenceable(4) %9, ptr noundef nonnull align 4 dereferenceable(4) %10)
  call void @_ZNSt6vectorISt4pairIiiESaIS1_EE9push_backEOS1_(ptr noundef nonnull align 8 dereferenceable(24) @rectangles, ptr noundef nonnull align 4 dereferenceable(8) %12)
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #3
  br label %59

59:                                               ; preds = %58, %52
  br label %60

60:                                               ; preds = %59, %48
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  ret void
}

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTSSt4pairIiiE", !11, i64 0, !11, i64 4}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !11, 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.std::pair" = type { i32, i32 }

@MIN = external dso_local local_unnamed_addr global i32, align 4
@rectangles = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z3maxii(i32 noundef, i32 noundef) local_unnamed_addr #0

; 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 @_ZNSt6vectorISt4pairIiiESaIS1_EE5clearEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIiiESaIS1_EE9push_backEOS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiiEC2IRiS2_TnNSt9enable_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 #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

; Function Attrs: mustprogress uwtable
define dso_local void @_Z2l6RSt4pairIiiES1_S1_S1_(ptr nocapture noundef nonnull readonly align 4 dereferenceable(8) %0, ptr nocapture noundef nonnull readonly align 4 dereferenceable(8) %1, ptr nocapture noundef nonnull readonly align 4 dereferenceable(8) %2, ptr nocapture noundef nonnull readonly align 4 dereferenceable(8) %3) local_unnamed_addr #2 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca %"struct.std::pair", align 4
  %8 = alloca %"struct.std::pair", align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #3
  %9 = load i32, ptr %0, align 4, !tbaa !5
  %10 = load i32, ptr %1, align 4, !tbaa !5
  %11 = tail call noundef i32 @_Z3maxii(i32 noundef %9, i32 noundef %10)
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = tail call noundef i32 @_Z3maxii(i32 noundef %12, i32 noundef %13)
  %15 = add nsw i32 %14, %11
  store i32 %15, ptr %5, align 4, !tbaa !10
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %6) #3
  %16 = getelementptr inbounds i8, ptr %0, i64 4
  %17 = load i32, ptr %16, align 4, !tbaa !11
  %18 = getelementptr inbounds i8, ptr %1, i64 4
  %19 = load i32, ptr %18, align 4, !tbaa !11
  %20 = add nsw i32 %19, %17
  %21 = getelementptr inbounds i8, ptr %3, i64 4
  %22 = load i32, ptr %21, align 4, !tbaa !11
  %23 = getelementptr inbounds i8, ptr %2, i64 4
  %24 = load i32, ptr %23, align 4, !tbaa !11
  %25 = add nsw i32 %24, %22
  %26 = tail call noundef i32 @_Z3maxii(i32 noundef %20, i32 noundef %25)
  store i32 %26, ptr %6, align 4, !tbaa !10
  %27 = mul nsw i32 %15, %26
  %28 = load i32, ptr @MIN, align 4, !tbaa !10
  %29 = icmp slt i32 %27, %28
  br i1 %29, label %30, label %31

30:                                               ; preds = %4
  store i32 %27, ptr @MIN, align 4, !tbaa !10
  tail call void @_ZNSt6vectorISt4pairIiiESaIS1_EE5clearEv(ptr noundef nonnull align 8 dereferenceable(24) @rectangles) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %7) #3
  call void @_ZNSt4pairIiiEC2IRiS2_TnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8) %7, ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %6)
  call void @_ZNSt6vectorISt4pairIiiESaIS1_EE9push_backEOS1_(ptr noundef nonnull align 8 dereferenceable(24) @rectangles, ptr noundef nonnull align 4 dereferenceable(8) %7)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %7) #3
  br label %34

31:                                               ; preds = %4
  %32 = icmp eq i32 %27, %28
  br i1 %32, label %33, label %34

33:                                               ; preds = %31
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %8) #3
  call void @_ZNSt4pairIiiEC2IRiS2_TnNSt9enable_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) %5, ptr noundef nonnull align 4 dereferenceable(4) %6)
  call void @_ZNSt6vectorISt4pairIiiESaIS1_EE9push_backEOS1_(ptr noundef nonnull align 8 dereferenceable(24) @rectangles, ptr noundef nonnull align 4 dereferenceable(8) %8)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %8) #3
  br label %34

34:                                               ; preds = %31, %33, %30
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #3
  ret void
}

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 = { 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, !7, i64 0}
!6 = !{!"_ZTSSt4pairIiiE", !7, i64 0, !7, i64 4}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!7, !7, i64 0}
!11 = !{!6, !7, i64 4}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass