; LLVM IR from forestLoop/Learning-ITMO-Academy-Pilot-Course :: binary-search/5-C.ll (Z10findKthSumRSt6vectorIiSaIiEES2_i)

; 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 }
%class.anon = type <{ ptr, ptr, i32, [4 x i8] }>

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z10findKthSumRSt6vectorIiSaIiEES2_i(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %8 = alloca %"class.__gnu_cxx::__normal_iterator", align 8
  %9 = alloca %class.anon, align 8
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = call ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %13) #4
  %15 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %7, i32 0, i32 0
  store ptr %14, ptr %15, align 8
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = call ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %16) #4
  %18 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %8, i32 0, i32 0
  store ptr %17, ptr %18, align 8
  %19 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %7, i32 0, i32 0
  %20 = load ptr, ptr %19, align 8
  %21 = getelementptr inbounds %"class.__gnu_cxx::__normal_iterator", ptr %8, i32 0, i32 0
  %22 = load ptr, ptr %21, align 8
  call void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEEEvT_S7_(ptr %20, ptr %22)
  call void @llvm.lifetime.start.p0(i64 24, ptr %9) #4
  %23 = getelementptr inbounds %class.anon, ptr %9, i32 0, i32 0
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %24, ptr %23, align 8, !tbaa !5
  %25 = getelementptr inbounds %class.anon, ptr %9, i32 0, i32 1
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %26, ptr %25, align 8, !tbaa !5
  %27 = getelementptr inbounds %class.anon, ptr %9, i32 0, i32 2
  %28 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %28, ptr %27, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #4
  store i32 1, ptr %10, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #4
  store i32 2000000001, ptr %11, align 4, !tbaa !9
  br label %29

29:                                               ; preds = %47, %3
  %30 = load i32, ptr %10, align 4, !tbaa !9
  %31 = add nsw i32 %30, 1
  %32 = load i32, ptr %11, align 4, !tbaa !9
  %33 = icmp slt i32 %31, %32
  br i1 %33, label %34, label %48

34:                                               ; preds = %29
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #4
  %35 = load i32, ptr %10, align 4, !tbaa !9
  %36 = load i32, ptr %11, align 4, !tbaa !9
  %37 = load i32, ptr %10, align 4, !tbaa !9
  %38 = sub nsw i32 %36, %37
  %39 = sdiv i32 %38, 2
  %40 = add nsw i32 %35, %39
  store i32 %40, ptr %12, align 4, !tbaa !9
  %41 = load i32, ptr %12, align 4, !tbaa !9
  %42 = call noundef zeroext i1 @"_ZZ10findKthSumRSt6vectorIiSaIiEES2_iENK3$_0clEi"(ptr noundef nonnull align 8 dereferenceable(20) %9, i32 noundef %41)
  br i1 %42, label %43, label %45

43:                                               ; preds = %34
  %44 = load i32, ptr %12, align 4, !tbaa !9
  store i32 %44, ptr %10, align 4, !tbaa !9
  br label %47

45:                                               ; preds = %34
  %46 = load i32, ptr %12, align 4, !tbaa !9
  store i32 %46, ptr %11, align 4, !tbaa !9
  br label %47

47:                                               ; preds = %45, %43
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #4
  br label %29, !llvm.loop !13

48:                                               ; preds = %29
  %49 = load i32, ptr %10, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #4
  call void @llvm.lifetime.end.p0(i64 24, ptr %9) #4
  ret i32 %49
}

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEEEvT_S7_(ptr, ptr) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: inlinehint mustprogress uwtable
declare hidden noundef zeroext i1 @"_ZZ10findKthSumRSt6vectorIiSaIiEES2_iENK3$_0clEi"(ptr noundef nonnull align 8 dereferenceable(20), i32 noundef) #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

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 = { 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 #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 16}
!12 = !{!"_ZTSZ10findKthSumRSt6vectorIiSaIiEES2_iE3$_0", !6, i64 0, !6, i64 8, !10, i64 16}
!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"

%class.anon = type <{ ptr, ptr, i32, [4 x i8] }>

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z10findKthSumRSt6vectorIiSaIiEES2_i(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(24) %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = alloca %class.anon, align 8
  %5 = tail call ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #4
  %6 = tail call ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24) %1) #4
  tail call void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEEEvT_S7_(ptr %5, ptr %6)
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %4) #4
  store ptr %0, ptr %4, align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %4, i64 8
  store ptr %1, ptr %7, align 8, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %4, i64 16
  store i32 %2, ptr %8, align 8, !tbaa !9
  br label %9

9:                                                ; preds = %3, %9
  %.017 = phi i32 [ 1, %3 ], [ %..0, %9 ]
  %.01416 = phi i32 [ 2000000001, %3 ], [ %.014., %9 ]
  %10 = sub nsw i32 %.01416, %.017
  %11 = sdiv i32 %10, 2
  %12 = add nsw i32 %11, %.017
  %13 = call noundef zeroext i1 @"_ZZ10findKthSumRSt6vectorIiSaIiEES2_iENK3$_0clEi"(ptr noundef nonnull align 8 dereferenceable(20) %4, i32 noundef %12)
  %.014. = select i1 %13, i32 %.01416, i32 %12
  %..0 = select i1 %13, i32 %12, i32 %.017
  %14 = add nsw i32 %..0, 1
  %15 = icmp slt i32 %14, %.014.
  br i1 %15, label %9, label %16, !llvm.loop !12

16:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %4) #4
  ret i32 %..0
}

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIN9__gnu_cxx17__normal_iteratorIPiSt6vectorIiSaIiEEEEEvT_S7_(ptr, ptr) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE5beginEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local ptr @_ZNSt6vectorIiSaIiEE3endEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: inlinehint mustprogress uwtable
declare hidden noundef zeroext i1 @"_ZZ10findKthSumRSt6vectorIiSaIiEES2_iENK3$_0clEi"(ptr noundef nonnull align 8 dereferenceable(20), i32 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

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 = { 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 #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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 16}
!10 = !{!"_ZTSZ10findKthSumRSt6vectorIiSaIiEES2_iE3$_0", !6, i64 0, !6, i64 8, !11, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


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