; LLVM IR from specinfo-ua/UAPKI :: library/common/pkix (uapki-ns-util)

; 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.Attributes = type { %struct.anon.0, %struct.asn_struct_ctx_s }
%struct.anon.0 = type { ptr, i32, i32, ptr }
%struct.asn_struct_ctx_s = type { i16, i16, i32, ptr, i64 }
%struct.Attribute = type { %struct.ASN__PRIMITIVE_TYPE_s, %"struct.Attribute::value", %struct.asn_struct_ctx_s }
%struct.ASN__PRIMITIVE_TYPE_s = type { ptr, i32 }
%"struct.Attribute::value" = type { %struct.anon, %struct.asn_struct_ctx_s }
%struct.anon = type { ptr, i32, i32, 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: mustprogress uwtable
define dso_local noundef ptr @_ZN7UapkiNS4Util23attributeFromAttributesEPK10AttributesPKc(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = icmp ne ptr %9, null
  br i1 %10, label %11, label %48

11:                                               ; preds = %2
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = icmp ne ptr %12, null
  br i1 %13, label %14, label %48

14:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %42, %14
  %16 = load i32, ptr %6, align 4, !tbaa !9
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.Attributes, ptr %17, i32 0, i32 0
  %19 = getelementptr inbounds %struct.anon.0, ptr %18, i32 0, i32 1
  %20 = load i32, ptr %19, align 8, !tbaa !11
  %21 = icmp slt i32 %16, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %15
  store i32 2, ptr %7, align 4
  br label %45

23:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.Attributes, ptr %24, i32 0, i32 0
  %26 = getelementptr inbounds %struct.anon.0, ptr %25, i32 0, i32 0
  %27 = load ptr, ptr %26, align 8, !tbaa !17
  %28 = load i32, ptr %6, align 4, !tbaa !9
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds ptr, ptr %27, i64 %29
  %31 = load ptr, ptr %30, align 8, !tbaa !5
  store ptr %31, ptr %8, align 8, !tbaa !5
  %32 = load ptr, ptr %8, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.Attribute, ptr %32, i32 0, i32 0
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = call zeroext i1 @OID_is_equal_oid(ptr noundef %33, ptr noundef %34)
  br i1 %35, label %36, label %38

36:                                               ; preds = %23
  %37 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %37, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %39

38:                                               ; preds = %23
  store i32 0, ptr %7, align 4
  br label %39

39:                                               ; preds = %38, %36
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %40 = load i32, ptr %7, align 4
  switch i32 %40, label %45 [
    i32 0, label %41
  ]

41:                                               ; preds = %39
  br label %42

42:                                               ; preds = %41
  %43 = load i32, ptr %6, align 4, !tbaa !9
  %44 = add nsw i32 %43, 1
  store i32 %44, ptr %6, align 4, !tbaa !9
  br label %15, !llvm.loop !18

45:                                               ; preds = %39, %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %46 = load i32, ptr %7, align 4
  switch i32 %46, label %51 [
    i32 2, label %47
    i32 1, label %49
  ]

47:                                               ; preds = %45
  br label %48

48:                                               ; preds = %47, %11, %2
  store ptr null, ptr %3, align 8
  br label %49

49:                                               ; preds = %48, %45
  %50 = load ptr, ptr %3, align 8
  ret ptr %50

51:                                               ; preds = %45
  unreachable
}

declare zeroext i1 @OID_is_equal_oid(ptr noundef, ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 }

!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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"_ZTS10Attributes", !13, i64 0, !14, i64 24}
!13 = !{!"_ZTSN10AttributesUt_E", !6, i64 0, !10, i64 8, !10, i64 12, !6, i64 16}
!14 = !{!"_ZTS16asn_struct_ctx_s", !15, i64 0, !15, i64 2, !10, i64 4, !6, i64 8, !16, i64 16}
!15 = !{!"short", !7, i64 0}
!16 = !{!"long", !7, i64 0}
!17 = !{!12, !6, i64 0}
!18 = distinct !{!18, !19}
!19 = !{!"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: mustprogress uwtable
define dso_local noundef ptr @_ZN7UapkiNS4Util23attributeFromAttributesEPK10AttributesPKc(ptr noundef readonly %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = icmp ne ptr %0, null
  %4 = icmp ne ptr %1, null
  %or.cond = and i1 %3, %4
  br i1 %or.cond, label %.preheader, label %.thread

.preheader:                                       ; preds = %2
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  %6 = load i32, ptr %5, align 8, !tbaa !5
  %7 = icmp sgt i32 %6, 0
  br i1 %7, label %.lr.ph, label %.thread

8:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %9 = load i32, ptr %5, align 8, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = icmp slt i64 %indvars.iv.next, %10
  br i1 %11, label %.lr.ph, label %.thread, !llvm.loop !15

.lr.ph:                                           ; preds = %.preheader, %8
  %indvars.iv = phi i64 [ %indvars.iv.next, %8 ], [ 0, %.preheader ]
  %12 = load ptr, ptr %0, align 8, !tbaa !17
  %13 = getelementptr inbounds ptr, ptr %12, i64 %indvars.iv
  %14 = load ptr, ptr %13, align 8, !tbaa !18
  %15 = tail call zeroext i1 @OID_is_equal_oid(ptr noundef %14, ptr noundef nonnull %1)
  br i1 %15, label %.thread, label %8

.thread:                                          ; preds = %8, %.lr.ph, %.preheader, %2
  %.3 = phi ptr [ null, %2 ], [ null, %.preheader ], [ null, %8 ], [ %14, %.lr.ph ]
  ret ptr %.3
}

declare zeroext i1 @OID_is_equal_oid(ptr noundef, ptr noundef) local_unnamed_addr #1

attributes #0 = { mustprogress 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 = { "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, !11, i64 8}
!6 = !{!"_ZTS10Attributes", !7, i64 0, !12, i64 24}
!7 = !{!"_ZTSN10AttributesUt_E", !8, i64 0, !11, i64 8, !11, i64 12, !8, i64 16}
!8 = !{!"any pointer", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = !{!"int", !9, i64 0}
!12 = !{!"_ZTS16asn_struct_ctx_s", !13, i64 0, !13, i64 2, !11, i64 4, !8, i64 8, !14, i64 16}
!13 = !{!"short", !9, i64 0}
!14 = !{!"long", !9, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}
!17 = !{!6, !8, i64 0}
!18 = !{!8, !8, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass