; LLVM IR from Lakhankumawat/LearnCPP :: G-GreedyAlgorithms/OptimalMergePattern.ll (Z15min_computationiPi)

; 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::priority_queue" = type <{ %"class.std::vector", [8 x i8] }>
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z15min_computationiPi(i32 noundef %0, ptr noundef %1) #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca %"class.std::priority_queue", align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 0, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 32, ptr %7) #4
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(25) %7)
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %23, %2
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = icmp slt i32 %14, %15
  br i1 %16, label %17, label %30

17:                                               ; preds = %13
  %18 = load ptr, ptr %4, align 8, !tbaa !9
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds i32, ptr %18, i64 %20
  invoke void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25) %7, ptr noundef nonnull align 4 dereferenceable(4) %21)
          to label %22 unwind label %26

22:                                               ; preds = %17
  br label %23

23:                                               ; preds = %22
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %5, align 4, !tbaa !5
  br label %13, !llvm.loop !11

26:                                               ; preds = %31, %17
  %27 = landingpad { ptr, i32 }
          cleanup
  %28 = extractvalue { ptr, i32 } %27, 0
  store ptr %28, ptr %8, align 8
  %29 = extractvalue { ptr, i32 } %27, 1
  store i32 %29, ptr %9, align 4
  br label %67

30:                                               ; preds = %13
  br label %31

31:                                               ; preds = %50, %30
  %32 = invoke noundef i64 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(25) %7)
          to label %33 unwind label %26

33:                                               ; preds = %31
  %34 = icmp ugt i64 %32, 1
  br i1 %34, label %35, label %65

35:                                               ; preds = %33
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #4
  %36 = invoke noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25) %7)
          to label %37 unwind label %51

37:                                               ; preds = %35
  %38 = load i32, ptr %36, align 4, !tbaa !5
  store i32 %38, ptr %10, align 4, !tbaa !5
  invoke void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25) %7)
          to label %39 unwind label %51

39:                                               ; preds = %37
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #4
  %40 = invoke noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25) %7)
          to label %41 unwind label %55

41:                                               ; preds = %39
  %42 = load i32, ptr %40, align 4, !tbaa !5
  store i32 %42, ptr %11, align 4, !tbaa !5
  invoke void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25) %7)
          to label %43 unwind label %55

43:                                               ; preds = %41
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #4
  %44 = load i32, ptr %10, align 4, !tbaa !5
  %45 = load i32, ptr %11, align 4, !tbaa !5
  %46 = add nsw i32 %44, %45
  store i32 %46, ptr %12, align 4, !tbaa !5
  %47 = load i32, ptr %12, align 4, !tbaa !5
  %48 = load i32, ptr %6, align 4, !tbaa !5
  %49 = add nsw i32 %48, %47
  store i32 %49, ptr %6, align 4, !tbaa !5
  invoke void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25) %7, ptr noundef nonnull align 4 dereferenceable(4) %12)
          to label %50 unwind label %59

50:                                               ; preds = %43
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #4
  br label %31, !llvm.loop !13

51:                                               ; preds = %37, %35
  %52 = landingpad { ptr, i32 }
          cleanup
  %53 = extractvalue { ptr, i32 } %52, 0
  store ptr %53, ptr %8, align 8
  %54 = extractvalue { ptr, i32 } %52, 1
  store i32 %54, ptr %9, align 4
  br label %64

55:                                               ; preds = %41, %39
  %56 = landingpad { ptr, i32 }
          cleanup
  %57 = extractvalue { ptr, i32 } %56, 0
  store ptr %57, ptr %8, align 8
  %58 = extractvalue { ptr, i32 } %56, 1
  store i32 %58, ptr %9, align 4
  br label %63

59:                                               ; preds = %43
  %60 = landingpad { ptr, i32 }
          cleanup
  %61 = extractvalue { ptr, i32 } %60, 0
  store ptr %61, ptr %8, align 8
  %62 = extractvalue { ptr, i32 } %60, 1
  store i32 %62, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #4
  br label %63

63:                                               ; preds = %59, %55
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #4
  br label %64

64:                                               ; preds = %63, %51
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #4
  br label %67

65:                                               ; preds = %33
  %66 = load i32, ptr %6, align 4, !tbaa !5
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(25) %7) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  ret i32 %66

67:                                               ; preds = %64, %26
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(25) %7) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %68

68:                                               ; preds = %67
  %69 = load ptr, ptr %8, align 8
  %70 = load i32, ptr %9, align 4
  %71 = insertvalue { ptr, i32 } poison, ptr %69, 0
  %72 = insertvalue { ptr, i32 } %71, i32 %70, 1
  resume { ptr, i32 } %72
}

; 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 @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(25)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(25)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25)) #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: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(25)) unnamed_addr #3 align 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 = { 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 = { inlinehint 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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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::priority_queue" = type <{ %"class.std::vector", [8 x i8] }>
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z15min_computationiPi(i32 noundef %0, ptr noundef %1) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca %"class.std::priority_queue", align 8
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %3) #4
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(25) %3)
  %5 = icmp sgt i32 %0, 0
  br i1 %5, label %.lr.ph.preheader, label %.preheader

.lr.ph.preheader:                                 ; preds = %2
  %wide.trip.count = zext nneg i32 %0 to i64
  br label %.lr.ph

.preheader:                                       ; preds = %9, %2
  %6 = call noundef i64 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(25) %3)
  %7 = icmp ugt i64 %6, 1
  br i1 %7, label %.lr.ph24, label %._crit_edge

.lr.ph:                                           ; preds = %.lr.ph.preheader, %9
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %9 ]
  %8 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv
  invoke void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25) %3, ptr noundef nonnull align 4 dereferenceable(4) %8)
          to label %9 unwind label %10

9:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %.preheader, label %.lr.ph, !llvm.loop !5

10:                                               ; preds = %.lr.ph
  %11 = landingpad { ptr, i32 }
          cleanup
  br label %29

.lr.ph24:                                         ; preds = %.preheader, %19
  %.01023 = phi i32 [ %20, %19 ], [ 0, %.preheader ]
  %12 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25) %3)
  %13 = load i32, ptr %12, align 4, !tbaa !7
  invoke void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25) %3)
          to label %14 unwind label %23

14:                                               ; preds = %.lr.ph24
  %15 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25) %3)
  %16 = load i32, ptr %15, align 4, !tbaa !7
  invoke void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25) %3)
          to label %17 unwind label %25

17:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #4
  %18 = add nsw i32 %16, %13
  store i32 %18, ptr %4, align 4, !tbaa !7
  invoke void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25) %3, ptr noundef nonnull align 4 dereferenceable(4) %4)
          to label %19 unwind label %27

19:                                               ; preds = %17
  %20 = add nsw i32 %18, %.01023
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #4
  %21 = call noundef i64 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(25) %3)
  %22 = icmp ugt i64 %21, 1
  br i1 %22, label %.lr.ph24, label %._crit_edge, !llvm.loop !11

23:                                               ; preds = %.lr.ph24
  %24 = landingpad { ptr, i32 }
          cleanup
  br label %29

25:                                               ; preds = %14
  %26 = landingpad { ptr, i32 }
          cleanup
  br label %29

27:                                               ; preds = %17
  %28 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #4
  br label %29

._crit_edge:                                      ; preds = %19, %.preheader
  %.010.lcssa = phi i32 [ 0, %.preheader ], [ %20, %19 ]
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(25) %3) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #4
  ret i32 %.010.lcssa

29:                                               ; preds = %23, %27, %25, %10
  %.pn17 = phi { ptr, i32 } [ %11, %10 ], [ %24, %23 ], [ %28, %27 ], [ %26, %25 ]
  call void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(25) %3) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #4
  resume { ptr, i32 } %.pn17
}

; 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 @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEEC2IS2_vEEv(ptr noundef nonnull align 8 dereferenceable(25)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4pushERKi(ptr noundef nonnull align 8 dereferenceable(25), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(25)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3topEv(ptr noundef nonnull align 8 dereferenceable(25)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEE3popEv(ptr noundef nonnull align 8 dereferenceable(25)) local_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: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZNSt14priority_queueIiSt6vectorIiSaIiEESt7greaterIiEED2Ev(ptr noundef nonnull align 8 dereferenceable(25)) unnamed_addr #3 align 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { inlinehint 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = distinct !{!11, !6}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass