; LLVM IR from tleonhardt/practical_cryptography_engineering :: mbedtls (asn1write)

; 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"

; Function Attrs: nounwind uwtable
declare dso_local i32 @mbedtls_asn1_write_len(ptr noundef, ptr noundef, i64 noundef) #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @mbedtls_asn1_write_tag(ptr noundef, ptr noundef, i8 noundef zeroext) #0

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

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

; Function Attrs: nounwind uwtable
define dso_local i32 @mbedtls_asn1_write_null(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  store i64 0, ptr %7, align 8, !tbaa !9
  br label %9

9:                                                ; preds = %2
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = call i32 @mbedtls_asn1_write_len(ptr noundef %10, ptr noundef %11, i64 noundef 0)
  store i32 %12, ptr %6, align 4, !tbaa !11
  %13 = icmp slt i32 %12, 0
  br i1 %13, label %14, label %16

14:                                               ; preds = %9
  %15 = load i32, ptr %6, align 4, !tbaa !11
  store i32 %15, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %41

16:                                               ; preds = %9
  %17 = load i32, ptr %6, align 4, !tbaa !11
  %18 = sext i32 %17 to i64
  %19 = load i64, ptr %7, align 8, !tbaa !9
  %20 = add i64 %19, %18
  store i64 %20, ptr %7, align 8, !tbaa !9
  br label %21

21:                                               ; preds = %16
  br label %22

22:                                               ; preds = %21
  br label %23

23:                                               ; preds = %22
  br label %24

24:                                               ; preds = %23
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  %27 = call i32 @mbedtls_asn1_write_tag(ptr noundef %25, ptr noundef %26, i8 noundef zeroext 5)
  store i32 %27, ptr %6, align 4, !tbaa !11
  %28 = icmp slt i32 %27, 0
  br i1 %28, label %29, label %31

29:                                               ; preds = %24
  %30 = load i32, ptr %6, align 4, !tbaa !11
  store i32 %30, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %41

31:                                               ; preds = %24
  %32 = load i32, ptr %6, align 4, !tbaa !11
  %33 = sext i32 %32 to i64
  %34 = load i64, ptr %7, align 8, !tbaa !9
  %35 = add i64 %34, %33
  store i64 %35, ptr %7, align 8, !tbaa !9
  br label %36

36:                                               ; preds = %31
  br label %37

37:                                               ; preds = %36
  br label %38

38:                                               ; preds = %37
  %39 = load i64, ptr %7, align 8, !tbaa !9
  %40 = trunc i64 %39 to i32
  store i32 %40, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %41

41:                                               ; preds = %38, %29, %14
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %42 = load i32, ptr %3, align 4
  ret i32 %42
}

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 = { 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 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"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"

; Function Attrs: nounwind uwtable
declare dso_local i32 @mbedtls_asn1_write_len(ptr noundef, ptr noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @mbedtls_asn1_write_tag(ptr noundef, ptr noundef, i8 noundef zeroext) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i32 @mbedtls_asn1_write_null(ptr noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = tail call i32 @mbedtls_asn1_write_len(ptr noundef %0, ptr noundef %1, i64 noundef 0)
  %4 = icmp slt i32 %3, 0
  br i1 %4, label %8, label %5

5:                                                ; preds = %2
  %6 = tail call i32 @mbedtls_asn1_write_tag(ptr noundef %0, ptr noundef %1, i8 noundef zeroext 5)
  %7 = icmp slt i32 %6, 0
  %narrow = select i1 %7, i32 0, i32 %3
  %spec.select = add nuw i32 %narrow, %6
  br label %8

8:                                                ; preds = %5, %2
  %.0 = phi i32 [ %3, %2 ], [ %spec.select, %5 ]
  ret i32 %.0
}

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" }

!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)"}


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