; LLVM IR from Dimandragon/non-parametric-dsp :: alglib-cpp/src (alglibinternal)

; 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"

%"struct.alglib_impl::ae_vector" = type { i64, i64, i8, %"struct.alglib_impl::ae_dyn_block", %union.anon }
%"struct.alglib_impl::ae_dyn_block" = type { ptr, ptr, ptr, ptr }
%union.anon = type { ptr }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_ZN11alglib_impl16ibinarysearchlftEPKNS_9ae_vectorElllPNS_8ae_stateE(ptr noundef %0, i64 noundef %1, i64 noundef %2, i64 noundef %3, ptr noundef %4) #1 {
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i64, align 8
  %12 = alloca i64, align 8
  store ptr %0, ptr %6, align 8, !tbaa !5
  store i64 %1, ptr %7, align 8, !tbaa !9
  store i64 %2, ptr %8, align 8, !tbaa !9
  store i64 %3, ptr %9, align 8, !tbaa !9
  store ptr %4, ptr %10, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #2
  br label %13

13:                                               ; preds = %35, %5
  %14 = load i64, ptr %7, align 8, !tbaa !9
  %15 = load i64, ptr %8, align 8, !tbaa !9
  %16 = icmp slt i64 %14, %15
  br i1 %16, label %17, label %36

17:                                               ; preds = %13
  %18 = load i64, ptr %7, align 8, !tbaa !9
  %19 = load i64, ptr %8, align 8, !tbaa !9
  %20 = add nsw i64 %18, %19
  %21 = sdiv i64 %20, 2
  store i64 %21, ptr %11, align 8, !tbaa !9
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = getelementptr inbounds %"struct.alglib_impl::ae_vector", ptr %22, i32 0, i32 4
  %24 = load ptr, ptr %23, align 8, !tbaa !11
  %25 = load i64, ptr %11, align 8, !tbaa !9
  %26 = getelementptr inbounds i64, ptr %24, i64 %25
  %27 = load i64, ptr %26, align 8, !tbaa !9
  %28 = load i64, ptr %9, align 8, !tbaa !9
  %29 = icmp slt i64 %27, %28
  br i1 %29, label %30, label %33

30:                                               ; preds = %17
  %31 = load i64, ptr %11, align 8, !tbaa !9
  %32 = add nsw i64 %31, 1
  store i64 %32, ptr %7, align 8, !tbaa !9
  br label %35

33:                                               ; preds = %17
  %34 = load i64, ptr %11, align 8, !tbaa !9
  store i64 %34, ptr %8, align 8, !tbaa !9
  br label %35

35:                                               ; preds = %33, %30
  br label %13, !llvm.loop !12

36:                                               ; preds = %13
  %37 = load i64, ptr %7, align 8, !tbaa !9
  store i64 %37, ptr %12, align 8, !tbaa !9
  %38 = load i64, ptr %12, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #2
  ret i64 %38
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 = !{!"long", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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 nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef i64 @_ZN11alglib_impl16ibinarysearchlftEPKNS_9ae_vectorElllPNS_8ae_stateE(ptr nocapture noundef readonly %0, i64 noundef %1, i64 noundef %2, i64 noundef %3, ptr nocapture noundef readnone %4) local_unnamed_addr #0 {
  %6 = icmp slt i64 %1, %2
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %5
  %7 = getelementptr inbounds i8, ptr %0, i64 56
  %8 = load ptr, ptr %7, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %.lr.ph, %9
  %.013 = phi i64 [ %1, %.lr.ph ], [ %.1, %9 ]
  %.01012 = phi i64 [ %2, %.lr.ph ], [ %.111, %9 ]
  %10 = add nsw i64 %.013, %.01012
  %11 = sdiv i64 %10, 2
  %12 = getelementptr inbounds i64, ptr %8, i64 %11
  %13 = load i64, ptr %12, align 8, !tbaa !8
  %14 = icmp slt i64 %13, %3
  %15 = add nsw i64 %11, 1
  %.111 = select i1 %14, i64 %.01012, i64 %11
  %.1 = select i1 %14, i64 %15, i64 %.013
  %16 = icmp slt i64 %.1, %.111
  br i1 %16, label %9, label %._crit_edge, !llvm.loop !10

._crit_edge:                                      ; preds = %9, %5
  %.0.lcssa = phi i64 [ %1, %5 ], [ %.1, %9 ]
  ret i64 %.0.lcssa
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) 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" }

!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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"long", !6, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass