; LLVM IR from Mohammed-Shoaib/Coding-Problems :: Google/Kick Start/2020/Round A/C.ll (Z7workoutiiRSt6vectorIiSaIiEE)

; 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::function" = type { %"class.std::_Function_base", ptr }
%"class.std::_Function_base" = type { %"union.std::_Any_data", ptr }
%"union.std::_Any_data" = type { %"union.std::_Nocopy_types" }
%"union.std::_Nocopy_types" = type { { i64, i64 } }
%class.anon = type { ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z7workoutiiRSt6vectorIiSaIiEE(i32 noundef %0, i32 noundef %1, ptr noundef nonnull align 8 dereferenceable(24) %2) #0 personality ptr @__gxx_personality_v0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca %"class.std::function", align 8
  %11 = alloca %class.anon, align 8
  %12 = alloca ptr, align 8
  %13 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store i32 1, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  store i32 1000000000, ptr %9, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 32, ptr %10) #3
  call void @llvm.lifetime.start.p0(i64 16, ptr %11) #3
  %14 = getelementptr inbounds %class.anon, ptr %11, i32 0, i32 0
  store ptr %4, ptr %14, align 8, !tbaa !9
  %15 = getelementptr inbounds %class.anon, ptr %11, i32 0, i32 1
  %16 = load ptr, ptr %6, align 8, !tbaa !9
  store ptr %16, ptr %15, align 8, !tbaa !9
  call void @"_ZNSt8functionIFiiEEC2IZ7workoutiiRSt6vectorIiSaIiEEE3$_0vEEOT_"(ptr noundef nonnull align 8 dereferenceable(32) %10, ptr noundef nonnull align 8 dereferenceable(16) %11) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %11) #3
  br label %17

17:                                               ; preds = %40, %3
  %18 = load i32, ptr %8, align 4, !tbaa !5
  %19 = load i32, ptr %9, align 4, !tbaa !5
  %20 = icmp slt i32 %18, %19
  br i1 %20, label %21, label %41

21:                                               ; preds = %17
  %22 = load i32, ptr %8, align 4, !tbaa !5
  %23 = load i32, ptr %9, align 4, !tbaa !5
  %24 = add nsw i32 %22, %23
  %25 = sdiv i32 %24, 2
  store i32 %25, ptr %7, align 4, !tbaa !5
  %26 = load i32, ptr %7, align 4, !tbaa !5
  %27 = invoke noundef i32 @_ZNKSt8functionIFiiEEclEi(ptr noundef nonnull align 8 dereferenceable(32) %10, i32 noundef %26)
          to label %28 unwind label %33

28:                                               ; preds = %21
  %29 = load i32, ptr %5, align 4, !tbaa !5
  %30 = icmp sle i32 %27, %29
  br i1 %30, label %31, label %37

31:                                               ; preds = %28
  %32 = load i32, ptr %7, align 4, !tbaa !5
  store i32 %32, ptr %9, align 4, !tbaa !5
  br label %40

33:                                               ; preds = %21
  %34 = landingpad { ptr, i32 }
          cleanup
  %35 = extractvalue { ptr, i32 } %34, 0
  store ptr %35, ptr %12, align 8
  %36 = extractvalue { ptr, i32 } %34, 1
  store i32 %36, ptr %13, align 4
  call void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(32) %10) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr %10) #3
  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 4, ptr %7) #3
  br label %43

37:                                               ; preds = %28
  %38 = load i32, ptr %7, align 4, !tbaa !5
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %8, align 4, !tbaa !5
  br label %40

40:                                               ; preds = %37, %31
  br label %17, !llvm.loop !11

41:                                               ; preds = %17
  %42 = load i32, ptr %9, align 4, !tbaa !5
  call void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(32) %10) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr %10) #3
  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 4, ptr %7) #3
  ret i32 %42

43:                                               ; preds = %33
  %44 = load ptr, ptr %12, align 8
  %45 = load i32, ptr %13, align 4
  %46 = insertvalue { ptr, i32 } poison, ptr %44, 0
  %47 = insertvalue { ptr, i32 } %46, i32 %45, 1
  resume { ptr, i32 } %47
}

; 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 hidden void @"_ZNSt8functionIFiiEEC2IZ7workoutiiRSt6vectorIiSaIiEEE3$_0vEEOT_"(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(16)) unnamed_addr #2 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
declare dso_local noundef i32 @_ZNKSt8functionIFiiEEclEi(ptr noundef nonnull align 8 dereferenceable(32), i32 noundef) #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 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 = { 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"}


; 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::function" = type { %"class.std::_Function_base", ptr }
%"class.std::_Function_base" = type { %"union.std::_Any_data", ptr }
%"union.std::_Any_data" = type { %"union.std::_Nocopy_types" }
%"union.std::_Nocopy_types" = type { { i64, i64 } }
%class.anon = type { ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z7workoutiiRSt6vectorIiSaIiEE(i32 noundef %0, i32 noundef %1, ptr noundef nonnull align 8 dereferenceable(24) %2) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %4 = alloca i32, align 4
  %5 = alloca %"class.std::function", align 8
  %6 = alloca %class.anon, align 8
  store i32 %0, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %5) #3
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %6) #3
  store ptr %4, ptr %6, align 8, !tbaa !9
  %7 = getelementptr inbounds i8, ptr %6, i64 8
  store ptr %2, ptr %7, align 8, !tbaa !9
  call void @"_ZNSt8functionIFiiEEC2IZ7workoutiiRSt6vectorIiSaIiEEE3$_0vEEOT_"(ptr noundef nonnull align 8 dereferenceable(32) %5, ptr noundef nonnull align 8 dereferenceable(16) %6) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %6) #3
  br label %8

8:                                                ; preds = %3, %12
  %.015 = phi i32 [ 1, %3 ], [ %.1, %12 ]
  %.01114 = phi i32 [ 1000000000, %3 ], [ %.112, %12 ]
  %9 = add nsw i32 %.015, %.01114
  %10 = sdiv i32 %9, 2
  %11 = invoke noundef i32 @_ZNKSt8functionIFiiEEclEi(ptr noundef nonnull align 8 dereferenceable(32) %5, i32 noundef %10)
          to label %12 unwind label %15

12:                                               ; preds = %8
  %.not = icmp sgt i32 %11, %1
  %13 = add nsw i32 %10, 1
  %.112 = select i1 %.not, i32 %.01114, i32 %10
  %.1 = select i1 %.not, i32 %13, i32 %.015
  %14 = icmp slt i32 %.1, %.112
  br i1 %14, label %8, label %17, !llvm.loop !11

15:                                               ; preds = %8
  %16 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(32) %5) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %5) #3
  resume { ptr, i32 } %16

17:                                               ; preds = %12
  call void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(32) %5) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %5) #3
  ret i32 %.112
}

; 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 hidden void @"_ZNSt8functionIFiiEEC2IZ7workoutiiRSt6vectorIiSaIiEEE3$_0vEEOT_"(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(16)) unnamed_addr #2 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
declare dso_local noundef i32 @_ZNKSt8functionIFiiEEclEi(ptr noundef nonnull align 8 dereferenceable(32), i32 noundef) local_unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 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 = { 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"}


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