; LLVM IR from bjourne/fast_snn_fpga :: src (var_vector)

; 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.var_vector = type { ptr, i64, i64, i64 }

; 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: nounwind uwtable
define dso_local void @var_vec_grow(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.var_vector, ptr %7, i32 0, i32 1
  %9 = load i64, ptr %8, align 8, !tbaa !11
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.var_vector, ptr %10, i32 0, i32 1
  %12 = load i64, ptr %11, align 8, !tbaa !11
  %13 = udiv i64 %12, 2
  %14 = add i64 %9, %13
  store i64 %14, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %15 = load i64, ptr %5, align 8, !tbaa !9
  %16 = load i64, ptr %4, align 8, !tbaa !9
  %17 = icmp ugt i64 %15, %16
  br i1 %17, label %18, label %20

18:                                               ; preds = %2
  %19 = load i64, ptr %5, align 8, !tbaa !9
  br label %22

20:                                               ; preds = %2
  %21 = load i64, ptr %4, align 8, !tbaa !9
  br label %22

22:                                               ; preds = %20, %18
  %23 = phi i64 [ %19, %18 ], [ %21, %20 ]
  store i64 %23, ptr %6, align 8, !tbaa !9
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.var_vector, ptr %24, i32 0, i32 0
  %26 = load ptr, ptr %25, align 8, !tbaa !13
  %27 = load i64, ptr %6, align 8, !tbaa !9
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.var_vector, ptr %28, i32 0, i32 3
  %30 = load i64, ptr %29, align 8, !tbaa !14
  %31 = mul i64 %27, %30
  %32 = call ptr @realloc(ptr noundef %26, i64 noundef %31) #4
  %33 = load ptr, ptr %3, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.var_vector, ptr %33, i32 0, i32 0
  store ptr %32, ptr %34, align 8, !tbaa !13
  %35 = load i64, ptr %6, align 8, !tbaa !9
  %36 = load ptr, ptr %3, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.var_vector, ptr %36, i32 0, i32 1
  store i64 %35, ptr %37, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret void
}

; Function Attrs: nounwind allocsize(1)
declare ptr @realloc(ptr noundef, i64 noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 allocsize(1) "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 }
attributes #4 = { nounwind allocsize(1) }

!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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"", !6, i64 0, !10, i64 8, !10, i64 16, !10, i64 24}
!13 = !{!12, !6, i64 0}
!14 = !{!12, !10, i64 24}


; 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 nounwind willreturn uwtable
define dso_local void @var_vec_grow(ptr nocapture noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = load i64, ptr %3, align 8, !tbaa !5
  %5 = lshr i64 %4, 1
  %6 = add i64 %5, %4
  %7 = tail call i64 @llvm.umax.i64(i64 %6, i64 %1)
  %8 = load ptr, ptr %0, align 8, !tbaa !11
  %9 = getelementptr inbounds i8, ptr %0, i64 24
  %10 = load i64, ptr %9, align 8, !tbaa !12
  %11 = mul i64 %7, %10
  %12 = tail call ptr @realloc(ptr noundef %8, i64 noundef %11) #3
  store ptr %12, ptr %0, align 8, !tbaa !11
  store i64 %7, ptr %3, align 8, !tbaa !5
  ret void
}

; Function Attrs: mustprogress nounwind willreturn allockind("realloc") allocsize(1) memory(argmem: readwrite, inaccessiblemem: readwrite)
declare noalias noundef ptr @realloc(ptr allocptr nocapture noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umax.i64(i64, i64) #2

attributes #0 = { mustprogress nounwind willreturn 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 nounwind willreturn allockind("realloc") allocsize(1) memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #3 = { nounwind allocsize(1) }

!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, !10, i64 8}
!6 = !{!"", !7, i64 0, !10, i64 8, !10, i64 16, !10, i64 24}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!6, !10, i64 24}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass