; LLVM IR from turi-code/SFrame :: oss_src/graphlab/util (safe_circular_char_buffer)

; 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.graphlab::safe_circular_char_buffer" = type <{ ptr, i64, i64, i64, %"class.graphlab::mutex", %"class.graphlab::conditional", i8, i8, [6 x i8] }>
%"class.graphlab::mutex" = type { %union.pthread_mutex_t }
%union.pthread_mutex_t = type { %struct.__pthread_mutex_s }
%struct.__pthread_mutex_s = type { i32, i32, i32, i32, i32, i16, i16, %struct.__pthread_internal_list }
%struct.__pthread_internal_list = type { ptr, ptr }
%"class.graphlab::conditional" = type { %union.pthread_cond_t }
%union.pthread_cond_t = type { %struct.__pthread_cond_s }
%struct.__pthread_cond_s = type { %union.__atomic_wide_counter, %union.__atomic_wide_counter, [2 x i32], [2 x i32], i32, i32, [2 x i32] }
%union.__atomic_wide_counter = type { 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: mustprogress nounwind uwtable
define dso_local noundef i64 @_ZNK8graphlab25safe_circular_char_buffer4sizeEv(ptr noundef nonnull align 8 dereferenceable(122) %0) #1 align 2 {
  %2 = alloca i64, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %8 = getelementptr inbounds %"class.graphlab::safe_circular_char_buffer", ptr %7, i32 0, i32 2
  %9 = load i64, ptr %8, align 8, !tbaa !9
  store i64 %9, ptr %4, align 8, !tbaa !15
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %10 = getelementptr inbounds %"class.graphlab::safe_circular_char_buffer", ptr %7, i32 0, i32 3
  %11 = load i64, ptr %10, align 8, !tbaa !16
  store i64 %11, ptr %5, align 8, !tbaa !15
  %12 = load i64, ptr %5, align 8, !tbaa !15
  %13 = load i64, ptr %4, align 8, !tbaa !15
  %14 = icmp sge i64 %12, %13
  br i1 %14, label %15, label %19

15:                                               ; preds = %1
  %16 = load i64, ptr %5, align 8, !tbaa !15
  %17 = load i64, ptr %4, align 8, !tbaa !15
  %18 = sub nsw i64 %16, %17
  store i64 %18, ptr %2, align 8
  store i32 1, ptr %6, align 4
  br label %32

19:                                               ; preds = %1
  %20 = load i64, ptr %4, align 8, !tbaa !15
  %21 = load i64, ptr %5, align 8, !tbaa !15
  %22 = icmp sgt i64 %20, %21
  br i1 %22, label %23, label %30

23:                                               ; preds = %19
  %24 = load i64, ptr %5, align 8, !tbaa !15
  %25 = getelementptr inbounds %"class.graphlab::safe_circular_char_buffer", ptr %7, i32 0, i32 1
  %26 = load i64, ptr %25, align 8, !tbaa !17
  %27 = add nsw i64 %24, %26
  %28 = load i64, ptr %4, align 8, !tbaa !15
  %29 = sub nsw i64 %27, %28
  store i64 %29, ptr %2, align 8
  store i32 1, ptr %6, align 4
  br label %32

30:                                               ; preds = %19
  br label %31

31:                                               ; preds = %30
  store i64 0, ptr %2, align 8
  store i32 1, ptr %6, align 4
  br label %32

32:                                               ; preds = %31, %23, %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %33 = load i64, ptr %2, align 8
  ret i64 %33
}

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, !11, i64 16}
!10 = !{!"_ZTSN8graphlab25safe_circular_char_bufferE", !6, i64 0, !11, i64 8, !11, i64 16, !11, i64 24, !12, i64 32, !13, i64 72, !14, i64 120, !14, i64 121}
!11 = !{!"long", !7, i64 0}
!12 = !{!"_ZTSN8graphlab5mutexE", !7, i64 0}
!13 = !{!"_ZTSN8graphlab11conditionalE", !7, i64 0}
!14 = !{!"bool", !7, i64 0}
!15 = !{!11, !11, i64 0}
!16 = !{!10, !11, i64 24}
!17 = !{!10, !11, i64 8}


; 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(argmem: read) uwtable
define dso_local noundef i64 @_ZNK8graphlab25safe_circular_char_buffer4sizeEv(ptr nocapture noundef nonnull readonly align 8 dereferenceable(122) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 16
  %3 = load i64, ptr %2, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %0, i64 24
  %5 = load i64, ptr %4, align 8, !tbaa !14
  %.not = icmp slt i64 %5, %3
  %6 = getelementptr inbounds i8, ptr %0, i64 8
  %7 = load i64, ptr %6, align 8
  %8 = select i1 %.not, i64 %7, i64 0
  %.pn = sub i64 %5, %3
  %.0 = add i64 %.pn, %8
  ret i64 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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, !10, i64 16}
!6 = !{!"_ZTSN8graphlab25safe_circular_char_bufferE", !7, i64 0, !10, i64 8, !10, i64 16, !10, i64 24, !11, i64 32, !12, i64 72, !13, i64 120, !13, i64 121}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"_ZTSN8graphlab5mutexE", !8, i64 0}
!12 = !{!"_ZTSN8graphlab11conditionalE", !8, i64 0}
!13 = !{!"bool", !8, i64 0}
!14 = !{!6, !10, i64 24}


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