; LLVM IR from guanzhi/GmSSL :: src (asn1)

; 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"

@stderr = external global ptr, align 8
@.str = external hidden unnamed_addr constant [13 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [58 x i8], align 1
@__FUNCTION__.asn1_tag_from_der = external hidden unnamed_addr constant [18 x i8], align 1

; Function Attrs: nounwind
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @asn1_tag_from_der(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
  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
  %8 = load ptr, ptr %5, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %10, label %20

10:                                               ; preds = %3
  %11 = load ptr, ptr %6, align 8, !tbaa !5
  %12 = icmp ne ptr %11, null
  br i1 %12, label %13, label %20

13:                                               ; preds = %10
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = load ptr, ptr %14, align 8, !tbaa !5
  %16 = icmp ne ptr %15, null
  br i1 %16, label %17, label %20

17:                                               ; preds = %13
  %18 = load ptr, ptr %7, align 8, !tbaa !5
  %19 = icmp ne ptr %18, null
  br i1 %19, label %25, label %20

20:                                               ; preds = %17, %13, %10, %3
  br label %21

21:                                               ; preds = %20
  %22 = load ptr, ptr @stderr, align 8, !tbaa !5
  %23 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %22, ptr noundef @.str, ptr noundef @.str.1, i32 noundef 115, ptr noundef @__FUNCTION__.asn1_tag_from_der) #2
  br label %24

24:                                               ; preds = %21
  store i32 -1, ptr %4, align 4
  br label %40

25:                                               ; preds = %17
  %26 = load ptr, ptr %7, align 8, !tbaa !5
  %27 = load i64, ptr %26, align 8, !tbaa !9
  %28 = icmp eq i64 %27, 0
  br i1 %28, label %29, label %30

29:                                               ; preds = %25
  store i32 0, ptr %4, align 4
  br label %40

30:                                               ; preds = %25
  %31 = load ptr, ptr %6, align 8, !tbaa !5
  %32 = load ptr, ptr %31, align 8, !tbaa !5
  %33 = getelementptr inbounds i8, ptr %32, i32 1
  store ptr %33, ptr %31, align 8, !tbaa !5
  %34 = load i8, ptr %32, align 1, !tbaa !11
  %35 = zext i8 %34 to i32
  %36 = load ptr, ptr %5, align 8, !tbaa !5
  store i32 %35, ptr %36, align 4, !tbaa !12
  %37 = load ptr, ptr %7, align 8, !tbaa !5
  %38 = load i64, ptr %37, align 8, !tbaa !9
  %39 = add i64 %38, -1
  store i64 %39, ptr %37, align 8, !tbaa !9
  store i32 1, ptr %4, align 4
  br label %40

40:                                               ; preds = %30, %29, %24
  %41 = load i32, ptr %4, align 4
  ret i32 %41
}

attributes #0 = { 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 #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 = !{!7, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"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"

@stderr = external local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [13 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [58 x i8], align 1
@__FUNCTION__.asn1_tag_from_der = external hidden unnamed_addr constant [18 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @fprintf(ptr nocapture noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: nofree nounwind uwtable
define dso_local range(i32 -1, 2) i32 @asn1_tag_from_der(ptr noundef writeonly %0, ptr noundef %1, ptr noundef %2) local_unnamed_addr #1 {
  %4 = icmp ne ptr %0, null
  %5 = icmp ne ptr %1, null
  %or.cond = and i1 %4, %5
  br i1 %or.cond, label %6, label %10

6:                                                ; preds = %3
  %7 = load ptr, ptr %1, align 8, !tbaa !5
  %8 = icmp ne ptr %7, null
  %9 = icmp ne ptr %2, null
  %or.cond3 = and i1 %9, %8
  br i1 %or.cond3, label %13, label %10

10:                                               ; preds = %3, %6
  %11 = load ptr, ptr @stderr, align 8, !tbaa !5
  %12 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %11, ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, i32 noundef 115, ptr noundef nonnull @__FUNCTION__.asn1_tag_from_der) #2
  br label %21

13:                                               ; preds = %6
  %14 = load i64, ptr %2, align 8, !tbaa !9
  %15 = icmp eq i64 %14, 0
  br i1 %15, label %21, label %16

16:                                               ; preds = %13
  %17 = getelementptr inbounds i8, ptr %7, i64 1
  store ptr %17, ptr %1, align 8, !tbaa !5
  %18 = load i8, ptr %7, align 1, !tbaa !11
  %19 = zext i8 %18 to i32
  store i32 %19, ptr %0, align 4, !tbaa !12
  %20 = add i64 %14, -1
  store i64 %20, ptr %2, align 8, !tbaa !9
  br label %21

21:                                               ; preds = %13, %16, %10
  %.0 = phi i32 [ 1, %16 ], [ -1, %10 ], [ 0, %13 ]
  ret i32 %.0
}

attributes #0 = { 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 #1 = { nofree 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 = { 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 = !{!"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 = !{!7, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"int", !7, i64 0}


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