; LLVM IR from Mohammed-Shoaib/Coding-Problems :: Google/Kick Start/2020/Round F/B.ll (Z13metal_harvestiiRSt6vectorISt4pairIiiESaIS1_EE)

; 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.__gnu_cxx::__normal_iterator" = type { ptr }
%"struct.std::pair" = type { i32, i32 }

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z13metal_harvestiiRSt6vectorISt4pairIiiESaIS1_EE(i32 noundef %0, i32 noundef %1, ptr noundef nonnull align 8 dereferenceable(24) %2) #0 {
  %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.__gnu_cxx::__normal_iterator", align 8
  %11 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %12 = 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) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #5
  store i32 0, ptr %8, align 4, !tbaa !5
  store i32 0, ptr %7, align 4, !tbaa !5
  %13 = load ptr, ptr %6, align 8, !tbaa !9
  %14 = call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %13) #5
  %15 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %10, i32 0, i32 0
  store ptr %14, ptr %15, align 8
  %16 = load ptr, ptr %6, align 8, !tbaa !9
  %17 = call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %16) #5
  %18 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %11, i32 0, i32 0
  store ptr %17, ptr %18, align 8
  %19 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %10, i32 0, i32 0
  %20 = load ptr, ptr %19, align 8
  %21 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %11, i32 0, i32 0
  %22 = load ptr, ptr %21, align 8
  call void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS3_SaIS3_EEEEEvT_S9_(ptr %20, ptr %22)
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #5
  store i32 0, ptr %12, align 4, !tbaa !5
  br label %23

23:                                               ; preds = %67, %3
  %24 = load i32, ptr %12, align 4, !tbaa !5
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = icmp slt i32 %24, %25
  br i1 %26, label %28, label %27

27:                                               ; preds = %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #5
  br label %70

28:                                               ; preds = %23
  %29 = load i32, ptr %8, align 4, !tbaa !5
  %30 = load ptr, ptr %6, align 8, !tbaa !9
  %31 = load i32, ptr %12, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt4pairIiiESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %30, i64 noundef %32) #5
  %34 = getelementptr inbounds %"struct.std::pair", ptr %33, i32 0, i32 1
  %35 = load i32, ptr %34, align 4, !tbaa !11
  %36 = icmp sge i32 %29, %35
  br i1 %36, label %37, label %38

37:                                               ; preds = %28
  br label %67

38:                                               ; preds = %28
  %39 = load ptr, ptr %6, align 8, !tbaa !9
  %40 = load i32, ptr %12, align 4, !tbaa !5
  %41 = sext i32 %40 to i64
  %42 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt4pairIiiESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %39, i64 noundef %41) #5
  %43 = getelementptr inbounds %"struct.std::pair", ptr %42, i32 0, i32 0
  %44 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %43, ptr noundef nonnull align 4 dereferenceable(4) %8)
  %45 = load i32, ptr %44, align 4, !tbaa !5
  store i32 %45, ptr %8, align 4, !tbaa !5
  %46 = load ptr, ptr %6, align 8, !tbaa !9
  %47 = load i32, ptr %12, align 4, !tbaa !5
  %48 = sext i32 %47 to i64
  %49 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt4pairIiiESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %46, i64 noundef %48) #5
  %50 = getelementptr inbounds %"struct.std::pair", ptr %49, i32 0, i32 1
  %51 = load i32, ptr %50, align 4, !tbaa !11
  %52 = load i32, ptr %8, align 4, !tbaa !5
  %53 = sub nsw i32 %51, %52
  %54 = load i32, ptr %5, align 4, !tbaa !5
  %55 = add nsw i32 %53, %54
  %56 = sub nsw i32 %55, 1
  %57 = load i32, ptr %5, align 4, !tbaa !5
  %58 = sdiv i32 %56, %57
  store i32 %58, ptr %9, align 4, !tbaa !5
  %59 = load i32, ptr %9, align 4, !tbaa !5
  %60 = load i32, ptr %7, align 4, !tbaa !5
  %61 = add nsw i32 %60, %59
  store i32 %61, ptr %7, align 4, !tbaa !5
  %62 = load i32, ptr %9, align 4, !tbaa !5
  %63 = load i32, ptr %5, align 4, !tbaa !5
  %64 = mul nsw i32 %62, %63
  %65 = load i32, ptr %8, align 4, !tbaa !5
  %66 = add nsw i32 %65, %64
  store i32 %66, ptr %8, align 4, !tbaa !5
  br label %67

67:                                               ; preds = %38, %37
  %68 = load i32, ptr %12, align 4, !tbaa !5
  %69 = add nsw i32 %68, 1
  store i32 %69, ptr %12, align 4, !tbaa !5
  br label %23, !llvm.loop !13

70:                                               ; preds = %27
  %71 = load i32, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  ret i32 %71
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS3_SaIS3_EEEEEvT_S9_(ptr, ptr) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt4pairIiiESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #3 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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 = { inlinehint 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 = { 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 = { 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 #5 = { 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 = !{!12, !6, i64 4}
!12 = !{!"_ZTSSt4pairIiiE", !6, i64 0, !6, i64 4}
!13 = distinct !{!13, !14}
!14 = !{!"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"

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z13metal_harvestiiRSt6vectorISt4pairIiiESaIS1_EE(i32 noundef %0, i32 noundef %1, ptr noundef nonnull align 8 dereferenceable(24) %2) local_unnamed_addr #0 {
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #5
  store i32 0, ptr %4, align 4, !tbaa !5
  %5 = tail call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %2) #5
  %6 = tail call ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %2) #5
  tail call void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS3_SaIS3_EEEEEvT_S9_(ptr %5, ptr %6)
  %7 = icmp sgt i32 %0, 0
  br i1 %7, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3
  %8 = add i32 %1, -1
  %wide.trip.count = zext nneg i32 %0 to i64
  br label %9

._crit_edge:                                      ; preds = %28, %3
  %.018.lcssa = phi i32 [ 0, %3 ], [ %.1, %28 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #5
  ret i32 %.018.lcssa

9:                                                ; preds = %.lr.ph, %28
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %28 ]
  %.01819 = phi i32 [ 0, %.lr.ph ], [ %.1, %28 ]
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt4pairIiiESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef %indvars.iv) #5
  %12 = getelementptr inbounds i8, ptr %11, i64 4
  %13 = load i32, ptr %12, align 4, !tbaa !9
  %.not = icmp slt i32 %10, %13
  br i1 %.not, label %14, label %28

14:                                               ; preds = %9
  %15 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt4pairIiiESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef %indvars.iv) #5
  %16 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %15, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %17 = load i32, ptr %16, align 4, !tbaa !5
  store i32 %17, ptr %4, align 4, !tbaa !5
  %18 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt4pairIiiESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef %indvars.iv) #5
  %19 = getelementptr inbounds i8, ptr %18, i64 4
  %20 = load i32, ptr %19, align 4, !tbaa !9
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = add i32 %8, %20
  %23 = sub i32 %22, %21
  %24 = sdiv i32 %23, %1
  %25 = add nsw i32 %24, %.01819
  %26 = mul nsw i32 %24, %1
  %27 = add nsw i32 %26, %21
  store i32 %27, ptr %4, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %9, %14
  %.1 = phi i32 [ %.01819, %9 ], [ %25, %14 ]
  %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 %._crit_edge, label %9, !llvm.loop !11
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPSt4pairIiiESt6vectorIS3_SaIS3_EEEEEvT_S9_(ptr, ptr) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorISt4pairIiiESaIS1_EE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorISt4pairIiiESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #3 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #4

; 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 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 = { inlinehint 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 = { 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 = { 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 #5 = { 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, !6, i64 4}
!10 = !{!"_ZTSSt4pairIiiE", !6, i64 0, !6, i64 4}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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