; LLVM IR from aws/s2n-tls :: crypto (s2n_certificate)

; 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.s2n_debug_info = type { ptr, ptr }

@_s2n_debug_info = external thread_local global %struct.s2n_debug_info, align 8
@s2n_errno = external thread_local global i32, align 4
@.str.33 = external hidden unnamed_addr constant [95 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare nonnull ptr @llvm.threadlocal.address.p0(ptr nonnull) #0

; Function Attrs: nounwind willreturn memory(read)
declare ptr @strrchr(ptr noundef, i32 noundef) #1

declare i32 @s2n_calculate_stacktrace() #2

declare i32 @s2n_stuffer_write_uint24(ptr noundef, i32 noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @s2n_send_empty_cert_chain(ptr noundef %0) #3 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  br label %4

4:                                                ; preds = %1
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = icmp ne ptr %5, null
  br i1 %6, label %38, label %7

7:                                                ; preds = %4
  br label %8

8:                                                ; preds = %7
  br label %9

9:                                                ; preds = %8
  %10 = call align 8 ptr @llvm.threadlocal.address.p0(ptr align 8 @_s2n_debug_info)
  %11 = getelementptr inbounds %struct.s2n_debug_info, ptr %10, i32 0, i32 0
  store ptr @.str.33, ptr %11, align 8, !tbaa !9
  %12 = call align 8 ptr @llvm.threadlocal.address.p0(ptr align 8 @_s2n_debug_info)
  %13 = getelementptr inbounds %struct.s2n_debug_info, ptr %12, i32 0, i32 0
  %14 = load ptr, ptr %13, align 8, !tbaa !9
  %15 = getelementptr inbounds i8, ptr %14, i64 21
  %16 = call ptr @strrchr(ptr noundef %15, i32 noundef 47) #4
  %17 = icmp ne ptr %16, null
  br i1 %17, label %18, label %25

18:                                               ; preds = %9
  %19 = call align 8 ptr @llvm.threadlocal.address.p0(ptr align 8 @_s2n_debug_info)
  %20 = getelementptr inbounds %struct.s2n_debug_info, ptr %19, i32 0, i32 0
  %21 = load ptr, ptr %20, align 8, !tbaa !9
  %22 = getelementptr inbounds i8, ptr %21, i64 21
  %23 = call ptr @strrchr(ptr noundef %22, i32 noundef 47) #4
  %24 = getelementptr inbounds i8, ptr %23, i64 1
  br label %30

25:                                               ; preds = %9
  %26 = call align 8 ptr @llvm.threadlocal.address.p0(ptr align 8 @_s2n_debug_info)
  %27 = getelementptr inbounds %struct.s2n_debug_info, ptr %26, i32 0, i32 0
  %28 = load ptr, ptr %27, align 8, !tbaa !9
  %29 = getelementptr inbounds i8, ptr %28, i64 21
  br label %30

30:                                               ; preds = %25, %18
  %31 = phi ptr [ %24, %18 ], [ %29, %25 ]
  %32 = call align 8 ptr @llvm.threadlocal.address.p0(ptr align 8 @_s2n_debug_info)
  %33 = getelementptr inbounds %struct.s2n_debug_info, ptr %32, i32 0, i32 1
  store ptr %31, ptr %33, align 8, !tbaa !11
  %34 = call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @s2n_errno)
  store i32 402653193, ptr %34, align 4, !tbaa !12
  %35 = call i32 @s2n_calculate_stacktrace()
  br label %36

36:                                               ; preds = %30
  store i32 -1, ptr %2, align 4
  br label %47

37:                                               ; No predecessors!
  br label %38

38:                                               ; preds = %37, %4
  br label %39

39:                                               ; preds = %38
  br label %40

40:                                               ; preds = %39
  %41 = load ptr, ptr %3, align 8, !tbaa !5
  %42 = call i32 @s2n_stuffer_write_uint24(ptr noundef %41, i32 noundef 0)
  %43 = icmp sgt i32 %42, -1
  br i1 %43, label %45, label %44

44:                                               ; preds = %40
  store i32 -1, ptr %2, align 4
  br label %47

45:                                               ; preds = %40
  br label %46

46:                                               ; preds = %45
  store i32 0, ptr %2, align 4
  br label %47

47:                                               ; preds = %46, %44, %36
  %48 = load i32, ptr %2, align 4
  ret i32 %48
}

attributes #0 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #1 = { nounwind willreturn memory(read) "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 = { "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 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 = { nounwind willreturn memory(read) }

!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, !6, i64 0}
!10 = !{!"s2n_debug_info", !6, i64 0, !6, i64 8}
!11 = !{!10, !6, i64 8}
!12 = !{!13, !13, i64 0}
!13 = !{!"int", !7, i64 0}


; 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"

%struct.s2n_debug_info = type { ptr, ptr }

@_s2n_debug_info = external thread_local local_unnamed_addr global %struct.s2n_debug_info, align 8
@s2n_errno = external thread_local local_unnamed_addr global i32, align 4
@.str.33 = external hidden unnamed_addr constant [95 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare nonnull ptr @llvm.threadlocal.address.p0(ptr nonnull) #0

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare ptr @strrchr(ptr noundef, i32 noundef) local_unnamed_addr #1

declare i32 @s2n_calculate_stacktrace() local_unnamed_addr #2

declare i32 @s2n_stuffer_write_uint24(ptr noundef, i32 noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, 1) i32 @s2n_send_empty_cert_chain(ptr noundef %0) local_unnamed_addr #3 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %2, label %10

2:                                                ; preds = %1
  %3 = tail call align 8 ptr @llvm.threadlocal.address.p0(ptr align 8 @_s2n_debug_info)
  store ptr @.str.33, ptr %3, align 8, !tbaa !5
  %4 = tail call ptr @strrchr(ptr noundef nonnull dereferenceable(1) getelementptr inbounds (i8, ptr @.str.33, i64 21), i32 noundef 47) #4
  %.not4 = icmp eq ptr %4, null
  %5 = getelementptr inbounds i8, ptr %4, i64 1
  %6 = select i1 %.not4, ptr getelementptr inbounds (i8, ptr @.str.33, i64 21), ptr %5
  %7 = getelementptr inbounds i8, ptr %3, i64 8
  store ptr %6, ptr %7, align 8, !tbaa !10
  %8 = tail call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @s2n_errno)
  store i32 402653193, ptr %8, align 4, !tbaa !11
  %9 = tail call i32 @s2n_calculate_stacktrace() #5
  br label %12

10:                                               ; preds = %1
  %11 = tail call i32 @s2n_stuffer_write_uint24(ptr noundef nonnull %0, i32 noundef 0) #5
  %.lobit = ashr i32 %11, 31
  br label %12

12:                                               ; preds = %10, %2
  %.0 = phi i32 [ -1, %2 ], [ %.lobit, %10 ]
  ret i32 %.0
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #1 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 = { "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 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 = { nounwind willreturn memory(read) }
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, !7, i64 0}
!6 = !{!"s2n_debug_info", !7, i64 0, !7, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!6, !7, i64 8}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !8, i64 0}


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