; LLVM IR from aws/s2n-tls :: tls (s2n_server_cert_request)

; 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 }
%struct.s2n_connection = type { i32, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, [22 x i8], [22 x i8], [22 x i8], i32, i32, %struct.s2n_timer, i64, i64, [32 x i8], i8, i8, i8, i8, i8, i8, i8, ptr, ptr, %struct.s2n_secrets, ptr, ptr, %struct.s2n_kex_parameters, %struct.s2n_handshake_parameters, %struct.s2n_psk_parameters, ptr, i8, i32, [5 x i8], %struct.s2n_stuffer, %struct.s2n_stuffer, %struct.s2n_stuffer, %struct.s2n_stuffer, i32, i64, [2 x i8], %struct.s2n_stuffer, i8, i8, i8, i8, %struct.s2n_atomic_flag, %struct.s2n_atomic_flag, %struct.s2n_handshake, i16, i32, i16, i64, i8, i64, i64, i64, %struct.s2n_atomic_flag, %struct.s2n_atomic_flag, [256 x i8], [256 x i8], i32, %struct.s2n_blob, i32, %struct.s2n_blob, %struct.s2n_blob, %struct.s2n_blob, %struct.s2n_client_hello, %struct.s2n_x509_validator, ptr, ptr, i8, i32, %struct.s2n_blob, i32, %struct.s2n_ticket_fields, [138 x i8], %struct.s2n_stuffer, %struct.s2n_blob, %struct.s2n_blob, i8, i8, i8, i16, i16, i32, i32, %struct.s2n_blob, i32, %struct.s2n_post_handshake, %struct.s2n_atomic_flag, i8, i8 }
%struct.s2n_timer = type { i64 }
%struct.s2n_secrets = type { %union.anon, i32 }
%union.anon = type { %struct.s2n_tls13_secrets }
%struct.s2n_tls13_secrets = type { [48 x i8], [48 x i8], [48 x i8], [48 x i8], [48 x i8], [48 x i8], [48 x i8], [48 x i8], i32 }
%struct.s2n_kex_parameters = type { %struct.s2n_dh_params, %struct.s2n_ecc_evp_params, [4 x ptr], %struct.s2n_ecc_evp_params, %struct.s2n_kem_group_params, %struct.s2n_kem_group_params, [8 x ptr], %struct.s2n_kem_params, %struct.s2n_blob, %struct.s2n_blob }
%struct.s2n_dh_params = type { ptr }
%struct.s2n_ecc_evp_params = type { ptr, ptr }
%struct.s2n_kem_group_params = type { ptr, %struct.s2n_kem_params, %struct.s2n_ecc_evp_params }
%struct.s2n_kem_params = type { ptr, %struct.s2n_blob, %struct.s2n_blob, %struct.s2n_blob, i8 }
%struct.s2n_handshake_parameters = type { %struct.s2n_pkey, %struct.s2n_pkey, %struct.s2n_blob, i32, %struct.s2n_sig_scheme_list, ptr, ptr, ptr, [4 x ptr], [4 x ptr], i8, i8, [32 x i8], [32 x i8] }
%struct.s2n_pkey = type { ptr, ptr, ptr, ptr, ptr, ptr }
%struct.s2n_sig_scheme_list = type { [128 x i16], i8 }
%struct.s2n_psk_parameters = type { i32, %struct.s2n_array, i16, i16, ptr, i32 }
%struct.s2n_array = type { %struct.s2n_blob, i32, i32 }
%struct.s2n_handshake = type { %struct.s2n_stuffer, ptr, [8 x i8], [48 x i8], [48 x i8], i8, i32, i32, i32, i32, %struct.s2n_offered_early_data, i8, i32 }
%struct.s2n_offered_early_data = type { ptr }
%struct.s2n_client_hello = type { %struct.s2n_blob, %struct.s2n_parsed_extensions_list, %struct.s2n_blob, %struct.s2n_blob, %struct.s2n_blob, i8, i8, i8 }
%struct.s2n_parsed_extensions_list = type { [21 x %struct.s2n_parsed_extension], %struct.s2n_blob, i16 }
%struct.s2n_parsed_extension = type { %struct.s2n_blob, i16, i16, i8 }
%struct.s2n_x509_validator = type { ptr, ptr, i8, i8, i16, ptr, i32, ptr, %struct.s2n_cert_validation_info, i8 }
%struct.s2n_cert_validation_info = type { i8, [3 x i8] }
%struct.s2n_ticket_fields = type { %struct.s2n_blob, i32 }
%struct.s2n_stuffer = type { %struct.s2n_blob, i32, i32, i32, i8 }
%struct.s2n_blob = type { ptr, i32, i32, i8 }
%struct.s2n_post_handshake = type { %struct.s2n_stuffer, [4 x i8] }
%struct.s2n_atomic_flag = type { i32 }

@.str = external hidden unnamed_addr constant [100 x i8], align 1
@_s2n_debug_info = external thread_local global %struct.s2n_debug_info, align 8
@s2n_errno = external thread_local global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local i32 @s2n_tls13_cert_req_recv(ptr noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i8, align 1
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.s2n_connection, ptr %7, i32 0, i32 52
  %9 = getelementptr inbounds %struct.s2n_handshake, ptr %8, i32 0, i32 0
  store ptr %9, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #5
  store i8 0, ptr %5, align 1, !tbaa !9
  br label %10

10:                                               ; preds = %1
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = call i32 @s2n_stuffer_read_uint8(ptr noundef %11, ptr noundef %5)
  %13 = icmp sgt i32 %12, -1
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %75

15:                                               ; preds = %10
  br label %16

16:                                               ; preds = %15
  br label %17

17:                                               ; preds = %16
  br label %18

18:                                               ; preds = %17
  %19 = load i8, ptr %5, align 1, !tbaa !9
  %20 = zext i8 %19 to i32
  %21 = icmp ne i32 %20, 0
  br i1 %21, label %22, label %55

22:                                               ; preds = %18
  br label %23

23:                                               ; preds = %22
  br label %24

24:                                               ; preds = %23
  %25 = call align 8 ptr @llvm.threadlocal.address.p0(ptr align 8 @_s2n_debug_info)
  %26 = getelementptr inbounds %struct.s2n_debug_info, ptr %25, i32 0, i32 0
  store ptr @.str, ptr %26, align 8, !tbaa !10
  %27 = call align 8 ptr @llvm.threadlocal.address.p0(ptr align 8 @_s2n_debug_info)
  %28 = getelementptr inbounds %struct.s2n_debug_info, ptr %27, i32 0, i32 0
  %29 = load ptr, ptr %28, align 8, !tbaa !10
  %30 = getelementptr inbounds i8, ptr %29, i64 21
  %31 = call ptr @strrchr(ptr noundef %30, i32 noundef 47) #6
  %32 = icmp ne ptr %31, null
  br i1 %32, label %33, label %40

33:                                               ; preds = %24
  %34 = call align 8 ptr @llvm.threadlocal.address.p0(ptr align 8 @_s2n_debug_info)
  %35 = getelementptr inbounds %struct.s2n_debug_info, ptr %34, i32 0, i32 0
  %36 = load ptr, ptr %35, align 8, !tbaa !10
  %37 = getelementptr inbounds i8, ptr %36, i64 21
  %38 = call ptr @strrchr(ptr noundef %37, i32 noundef 47) #6
  %39 = getelementptr inbounds i8, ptr %38, i64 1
  br label %45

40:                                               ; preds = %24
  %41 = call align 8 ptr @llvm.threadlocal.address.p0(ptr align 8 @_s2n_debug_info)
  %42 = getelementptr inbounds %struct.s2n_debug_info, ptr %41, i32 0, i32 0
  %43 = load ptr, ptr %42, align 8, !tbaa !10
  %44 = getelementptr inbounds i8, ptr %43, i64 21
  br label %45

45:                                               ; preds = %40, %33
  %46 = phi ptr [ %39, %33 ], [ %44, %40 ]
  %47 = call align 8 ptr @llvm.threadlocal.address.p0(ptr align 8 @_s2n_debug_info)
  %48 = getelementptr inbounds %struct.s2n_debug_info, ptr %47, i32 0, i32 1
  store ptr %46, ptr %48, align 8, !tbaa !12
  %49 = call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @s2n_errno)
  store i32 335544322, ptr %49, align 4, !tbaa !13
  %50 = call i32 @s2n_calculate_stacktrace()
  br label %51

51:                                               ; preds = %45
  br label %52

52:                                               ; preds = %51
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %75

53:                                               ; No predecessors!
  br label %54

54:                                               ; preds = %53
  br label %55

55:                                               ; preds = %54, %18
  br label %56

56:                                               ; preds = %55
  br label %57

57:                                               ; preds = %56
  br label %58

58:                                               ; preds = %57
  %59 = load ptr, ptr %3, align 8, !tbaa !5
  %60 = load ptr, ptr %4, align 8, !tbaa !5
  %61 = call i32 @s2n_extension_list_recv(i32 noundef 5, ptr noundef %59, ptr noundef %60)
  %62 = icmp sgt i32 %61, -1
  br i1 %62, label %64, label %63

63:                                               ; preds = %58
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %75

64:                                               ; preds = %58
  br label %65

65:                                               ; preds = %64
  br label %66

66:                                               ; preds = %65
  br label %67

67:                                               ; preds = %66
  %68 = load ptr, ptr %3, align 8, !tbaa !5
  %69 = call i32 @s2n_set_cert_chain_as_client(ptr noundef %68)
  %70 = icmp sgt i32 %69, -1
  br i1 %70, label %72, label %71

71:                                               ; preds = %67
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %75

72:                                               ; preds = %67
  br label %73

73:                                               ; preds = %72
  br label %74

74:                                               ; preds = %73
  store i32 0, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %75

75:                                               ; preds = %74, %71, %63, %52, %14
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  %76 = load i32, ptr %2, align 4
  ret i32 %76
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare i32 @s2n_stuffer_read_uint8(ptr noundef, ptr noundef) #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare nonnull ptr @llvm.threadlocal.address.p0(ptr nonnull) #3

; Function Attrs: nounwind willreturn memory(read)
declare ptr @strrchr(ptr noundef, i32 noundef) #4

declare i32 @s2n_calculate_stacktrace() #2

declare i32 @s2n_extension_list_recv(i32 noundef, ptr noundef, ptr noundef) #2

; Function Attrs: nounwind uwtable
declare hidden i32 @s2n_set_cert_chain_as_client(ptr noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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 #5 = { nounwind }
attributes #6 = { 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 = !{!7, !7, i64 0}
!10 = !{!11, !6, i64 0}
!11 = !{!"s2n_debug_info", !6, i64 0, !6, i64 8}
!12 = !{!11, !6, i64 8}
!13 = !{!14, !14, i64 0}
!14 = !{!"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 }

@.str = external hidden unnamed_addr constant [100 x i8], align 1
@_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

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, 1) i32 @s2n_tls13_cert_req_recv(ptr noundef %0) local_unnamed_addr #0 {
  %2 = alloca i8, align 1
  %3 = getelementptr inbounds i8, ptr %0, i64 2016
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %2) #5
  store i8 0, ptr %2, align 1, !tbaa !5
  %4 = call i32 @s2n_stuffer_read_uint8(ptr noundef nonnull %3, ptr noundef nonnull %2) #5
  %5 = icmp sgt i32 %4, -1
  br i1 %5, label %6, label %21

6:                                                ; preds = %1
  %7 = load i8, ptr %2, align 1, !tbaa !5
  %.not = icmp eq i8 %7, 0
  br i1 %.not, label %16, label %8

8:                                                ; preds = %6
  %9 = call align 8 ptr @llvm.threadlocal.address.p0(ptr align 8 @_s2n_debug_info)
  store ptr @.str, ptr %9, align 8, !tbaa !8
  %10 = call ptr @strrchr(ptr noundef nonnull dereferenceable(1) getelementptr inbounds (i8, ptr @.str, i64 21), i32 noundef 47) #6
  %.not6 = icmp eq ptr %10, null
  %11 = getelementptr inbounds i8, ptr %10, i64 1
  %12 = select i1 %.not6, ptr getelementptr inbounds (i8, ptr @.str, i64 21), ptr %11
  %13 = getelementptr inbounds i8, ptr %9, i64 8
  store ptr %12, ptr %13, align 8, !tbaa !11
  %14 = call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @s2n_errno)
  store i32 335544322, ptr %14, align 4, !tbaa !12
  %15 = call i32 @s2n_calculate_stacktrace() #5
  br label %21

16:                                               ; preds = %6
  %17 = call i32 @s2n_extension_list_recv(i32 noundef 5, ptr noundef %0, ptr noundef nonnull %3) #5
  %18 = icmp sgt i32 %17, -1
  br i1 %18, label %19, label %21

19:                                               ; preds = %16
  %20 = call i32 @s2n_set_cert_chain_as_client(ptr noundef %0)
  %.lobit = ashr i32 %20, 31
  br label %21

21:                                               ; preds = %19, %16, %1, %8
  %.0 = phi i32 [ -1, %8 ], [ -1, %1 ], [ -1, %16 ], [ %.lobit, %19 ]
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %2) #5
  ret i32 %.0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare i32 @s2n_stuffer_read_uint8(ptr noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare nonnull ptr @llvm.threadlocal.address.p0(ptr nonnull) #3

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare ptr @strrchr(ptr noundef, i32 noundef) local_unnamed_addr #4

declare i32 @s2n_calculate_stacktrace() local_unnamed_addr #2

declare i32 @s2n_extension_list_recv(i32 noundef, ptr noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
declare hidden i32 @s2n_set_cert_chain_as_client(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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 #5 = { nounwind }
attributes #6 = { 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !10, i64 0}
!9 = !{!"s2n_debug_info", !10, i64 0, !10, i64 8}
!10 = !{!"any pointer", !6, i64 0}
!11 = !{!9, !10, i64 8}
!12 = !{!13, !13, i64 0}
!13 = !{!"int", !6, i64 0}


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