; LLVM IR from tleonhardt/practical_cryptography_engineering :: mbedtls (net_sockets)

; 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.mbedtls_net_context = type { i32 }

; 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
declare hidden i32 @net_would_block(ptr noundef) #1

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

16:                                               ; preds = %3
  store i32 -69, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %47

17:                                               ; preds = %3
  %18 = load i32, ptr %9, align 4, !tbaa !14
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = load i64, ptr %7, align 8, !tbaa !9
  %21 = call i64 @read(i32 noundef %18, ptr noundef %19, i64 noundef %20)
  %22 = trunc i64 %21 to i32
  store i32 %22, ptr %8, align 4, !tbaa !14
  %23 = load i32, ptr %8, align 4, !tbaa !14
  %24 = icmp slt i32 %23, 0
  br i1 %24, label %25, label %45

25:                                               ; preds = %17
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  %27 = call i32 @net_would_block(ptr noundef %26)
  %28 = icmp ne i32 %27, 0
  br i1 %28, label %29, label %30

29:                                               ; preds = %25
  store i32 -26880, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %47

30:                                               ; preds = %25
  %31 = call ptr @__errno_location() #5
  %32 = load i32, ptr %31, align 4, !tbaa !14
  %33 = icmp eq i32 %32, 32
  br i1 %33, label %38, label %34

34:                                               ; preds = %30
  %35 = call ptr @__errno_location() #5
  %36 = load i32, ptr %35, align 4, !tbaa !14
  %37 = icmp eq i32 %36, 104
  br i1 %37, label %38, label %39

38:                                               ; preds = %34, %30
  store i32 -80, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %47

39:                                               ; preds = %34
  %40 = call ptr @__errno_location() #5
  %41 = load i32, ptr %40, align 4, !tbaa !14
  %42 = icmp eq i32 %41, 4
  br i1 %42, label %43, label %44

43:                                               ; preds = %39
  store i32 -26880, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %47

44:                                               ; preds = %39
  store i32 -76, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %47

45:                                               ; preds = %17
  %46 = load i32, ptr %8, align 4, !tbaa !14
  store i32 %46, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %47

47:                                               ; preds = %45, %44, %43, %38, %29, %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  %48 = load i32, ptr %4, align 4
  ret i32 %48
}

declare i64 @read(i32 noundef, ptr noundef, i64 noundef) #2

; Function Attrs: nounwind willreturn memory(none)
declare ptr @__errno_location() #3

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 = { "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 willreturn memory(none) "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 }
attributes #5 = { nounwind willreturn memory(none) }

!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, !13, i64 0}
!12 = !{!"", !13, i64 0}
!13 = !{!"int", !7, i64 0}
!14 = !{!13, !13, 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"

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

; Function Attrs: nounwind uwtable
define dso_local range(i32 -26880, -2147483648) i32 @mbedtls_net_recv(ptr noundef %0, ptr nocapture noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = load i32, ptr %0, align 4, !tbaa !5
  %5 = icmp slt i32 %4, 0
  br i1 %5, label %17, label %6

6:                                                ; preds = %3
  %7 = tail call i64 @read(i32 noundef %4, ptr noundef %1, i64 noundef %2) #3
  %8 = trunc i64 %7 to i32
  %9 = icmp slt i32 %8, 0
  br i1 %9, label %10, label %17

10:                                               ; preds = %6
  %11 = tail call i32 @net_would_block(ptr noundef nonnull %0)
  %.not = icmp eq i32 %11, 0
  br i1 %.not, label %12, label %17

12:                                               ; preds = %10
  %13 = tail call ptr @__errno_location() #4
  %14 = load i32, ptr %13, align 4, !tbaa !10
  switch i32 %14, label %16 [
    i32 32, label %17
    i32 104, label %17
    i32 4, label %15
  ]

15:                                               ; preds = %12
  br label %17

16:                                               ; preds = %12
  br label %17

17:                                               ; preds = %6, %12, %12, %10, %3, %16, %15
  %.0 = phi i32 [ -26880, %15 ], [ -76, %16 ], [ -69, %3 ], [ -26880, %10 ], [ -80, %12 ], [ -80, %12 ], [ %8, %6 ]
  ret i32 %.0
}

; Function Attrs: nofree
declare noundef i64 @read(i32 noundef, ptr nocapture noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)
declare ptr @__errno_location() local_unnamed_addr #2

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 = { nofree "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 = { mustprogress nofree nosync nounwind willreturn memory(none) "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 willreturn memory(none) }

!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 = !{!"", !7, i64 0}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!7, !7, i64 0}


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