; LLVM IR from aws/s2n-tls :: docs/examples (s2n_negotiate)

; 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"

@s2n_errno = external thread_local global i32, align 4
@stderr = external global ptr, align 8
@.str = external hidden unnamed_addr constant [15 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @s2n_example_negotiate(ptr noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %24, %1
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = call i32 @s2n_negotiate(ptr noundef %7, ptr noundef %4)
  %9 = icmp ne i32 %8, 0
  br i1 %9, label %10, label %25

10:                                               ; preds = %6
  %11 = call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @s2n_errno)
  %12 = load i32, ptr %11, align 4, !tbaa !9
  %13 = call i32 @s2n_error_get_type(i32 noundef %12)
  %14 = icmp ne i32 %13, 3
  br i1 %14, label %15, label %24

15:                                               ; preds = %10
  %16 = load ptr, ptr @stderr, align 8, !tbaa !5
  %17 = call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @s2n_errno)
  %18 = load i32, ptr %17, align 4, !tbaa !9
  %19 = call ptr @s2n_strerror(i32 noundef %18, ptr noundef null)
  %20 = call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @s2n_errno)
  %21 = load i32, ptr %20, align 4, !tbaa !9
  %22 = call ptr @s2n_strerror_debug(i32 noundef %21, ptr noundef null)
  %23 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %16, ptr noundef @.str, ptr noundef %19, ptr noundef %22) #5
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %26

24:                                               ; preds = %10
  br label %6, !llvm.loop !11

25:                                               ; preds = %6
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %26

26:                                               ; preds = %25, %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  %27 = load i32, ptr %2, align 4
  ret i32 %27
}

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

declare i32 @s2n_negotiate(ptr noundef, ptr noundef) #2

declare i32 @s2n_error_get_type(i32 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
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #4

declare ptr @s2n_strerror(i32 noundef, ptr noundef) #2

declare ptr @s2n_strerror_debug(i32 noundef, ptr noundef) #2

; 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 "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 }

!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 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

@s2n_errno = external thread_local local_unnamed_addr global i32, align 4
@stderr = external local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [15 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, 1) i32 @s2n_example_negotiate(ptr noundef %0) local_unnamed_addr #0 {
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  store i32 0, ptr %2, align 4, !tbaa !5
  %3 = tail call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @s2n_errno)
  br label %4

4:                                                ; preds = %6, %1
  %5 = call i32 @s2n_negotiate(ptr noundef %0, ptr noundef nonnull %2) #5
  %.not = icmp eq i32 %5, 0
  br i1 %.not, label %.loopexit, label %6

6:                                                ; preds = %4
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = call i32 @s2n_error_get_type(i32 noundef %7) #5
  %.not1 = icmp eq i32 %8, 3
  br i1 %.not1, label %4, label %9, !llvm.loop !9

9:                                                ; preds = %6
  %10 = load ptr, ptr @stderr, align 8, !tbaa !11
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = call ptr @s2n_strerror(i32 noundef %11, ptr noundef null) #5
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = call ptr @s2n_strerror_debug(i32 noundef %13, ptr noundef null) #5
  %15 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %10, ptr noundef nonnull @.str, ptr noundef %12, ptr noundef %14) #6
  br label %.loopexit

.loopexit:                                        ; preds = %4, %9
  %.0 = phi i32 [ -1, %9 ], [ 0, %4 ]
  call void @llvm.lifetime.end.p0(i64 4, 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_negotiate(ptr noundef, ptr noundef) local_unnamed_addr #2

declare i32 @s2n_error_get_type(i32 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: nofree nounwind
declare noundef i32 @fprintf(ptr nocapture noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #4

declare ptr @s2n_strerror(i32 noundef, ptr noundef) local_unnamed_addr #2

declare ptr @s2n_strerror_debug(i32 noundef, ptr noundef) local_unnamed_addr #2

; 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 = { nofree nounwind "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 = { cold 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !12, i64 0}
!12 = !{!"any pointer", !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LICMPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass