; LLVM IR from tleonhardt/practical_cryptography_engineering :: mbedtls (x509_create)

; 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_asn1_named_data = type { %struct.mbedtls_asn1_buf, %struct.mbedtls_asn1_buf, ptr, i8 }
%struct.mbedtls_asn1_buf = type { i32, i64, ptr }

; 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
define dso_local i32 @mbedtls_x509_write_extensions(ptr noundef %0, ptr noundef %1, ptr noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i64, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  store i64 0, ptr %9, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %12 = load ptr, ptr %7, align 8, !tbaa !5
  store ptr %12, ptr %10, align 8, !tbaa !5
  br label %13

13:                                               ; preds = %32, %3
  %14 = load ptr, ptr %10, align 8, !tbaa !5
  %15 = icmp ne ptr %14, null
  br i1 %15, label %16, label %36

16:                                               ; preds = %13
  br label %17

17:                                               ; preds = %16
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = load ptr, ptr %10, align 8, !tbaa !5
  %21 = call i32 @x509_write_extension(ptr noundef %18, ptr noundef %19, ptr noundef %20)
  store i32 %21, ptr %8, align 4, !tbaa !11
  %22 = icmp slt i32 %21, 0
  br i1 %22, label %23, label %25

23:                                               ; preds = %17
  %24 = load i32, ptr %8, align 4, !tbaa !11
  store i32 %24, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %39

25:                                               ; preds = %17
  %26 = load i32, ptr %8, align 4, !tbaa !11
  %27 = sext i32 %26 to i64
  %28 = load i64, ptr %9, align 8, !tbaa !9
  %29 = add i64 %28, %27
  store i64 %29, ptr %9, align 8, !tbaa !9
  br label %30

30:                                               ; preds = %25
  br label %31

31:                                               ; preds = %30
  br label %32

32:                                               ; preds = %31
  %33 = load ptr, ptr %10, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.mbedtls_asn1_named_data, ptr %33, i32 0, i32 2
  %35 = load ptr, ptr %34, align 8, !tbaa !13
  store ptr %35, ptr %10, align 8, !tbaa !5
  br label %13, !llvm.loop !16

36:                                               ; preds = %13
  %37 = load i64, ptr %9, align 8, !tbaa !9
  %38 = trunc i64 %37 to i32
  store i32 %38, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %39

39:                                               ; preds = %36, %23
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %40 = load i32, ptr %4, align 4
  ret i32 %40
}

; Function Attrs: nounwind uwtable
declare hidden i32 @x509_write_extension(ptr noundef, ptr noundef, ptr noundef) #1

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 = { 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}
!13 = !{!14, !6, i64 48}
!14 = !{!"mbedtls_asn1_named_data", !15, i64 0, !15, i64 24, !6, i64 48, !7, i64 56}
!15 = !{!"mbedtls_asn1_buf", !12, i64 0, !10, i64 8, !6, i64 16}
!16 = distinct !{!16, !17}
!17 = !{!"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"

; Function Attrs: nounwind uwtable
define dso_local i32 @mbedtls_x509_write_extensions(ptr noundef %0, ptr noundef %1, ptr noundef %2) local_unnamed_addr #0 {
  %.not13 = icmp eq ptr %2, null
  br i1 %.not13, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %6
  %.015 = phi ptr [ %9, %6 ], [ %2, %3 ]
  %.01014 = phi i32 [ %7, %6 ], [ 0, %3 ]
  %4 = tail call i32 @x509_write_extension(ptr noundef %0, ptr noundef %1, ptr noundef nonnull %.015)
  %5 = icmp slt i32 %4, 0
  br i1 %5, label %._crit_edge, label %6

6:                                                ; preds = %.lr.ph
  %7 = add i32 %4, %.01014
  %8 = getelementptr inbounds i8, ptr %.015, i64 48
  %9 = load ptr, ptr %8, align 8, !tbaa !5
  %.not = icmp eq ptr %9, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %6, %3
  %.011 = phi i32 [ 0, %3 ], [ %7, %6 ], [ %4, %.lr.ph ]
  ret i32 %.011
}

; Function Attrs: nounwind uwtable
declare hidden i32 @x509_write_extension(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #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)"}
!5 = !{!6, !12, i64 48}
!6 = !{!"mbedtls_asn1_named_data", !7, i64 0, !7, i64 24, !12, i64 48, !9, i64 56}
!7 = !{!"mbedtls_asn1_buf", !8, i64 0, !11, i64 8, !12, i64 16}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}
!11 = !{!"long", !9, i64 0}
!12 = !{!"any pointer", !9, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: AggressiveInstCombinePass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass