; 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"

; 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 @asn1_string_is_utf8_string(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %10, label %13

10:                                               ; preds = %2
  %11 = load i64, ptr %5, align 8, !tbaa !9
  %12 = icmp ne i64 %11, 0
  br i1 %12, label %14, label %13

13:                                               ; preds = %10, %2
  store i32 0, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %24

14:                                               ; preds = %10
  br label %15

15:                                               ; preds = %22, %14
  %16 = load i64, ptr %5, align 8, !tbaa !9
  %17 = icmp ne i64 %16, 0
  br i1 %17, label %18, label %23

18:                                               ; preds = %15
  %19 = call i32 @asn1_utf8char_from_bytes(ptr noundef %6, ptr noundef %4, ptr noundef %5)
  %20 = icmp ne i32 %19, 1
  br i1 %20, label %21, label %22

21:                                               ; preds = %18
  store i32 0, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %24

22:                                               ; preds = %18
  br label %15, !llvm.loop !11

23:                                               ; preds = %15
  store i32 1, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %24

24:                                               ; preds = %23, %21, %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %25 = load i32, ptr %3, align 4
  ret i32 %25
}

; Function Attrs: nounwind uwtable
declare hidden i32 @asn1_utf8char_from_bytes(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 = distinct !{!11, !12}
!12 = !{!"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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress 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 range(i32 0, 2) i32 @asn1_string_is_utf8_string(ptr noundef %0, i64 noundef %1) local_unnamed_addr #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #2
  %6 = icmp ne ptr %0, null
  %7 = icmp ne i64 %1, 0
  %or.cond = and i1 %6, %7
  br i1 %or.cond, label %.preheader, label %.loopexit

thread-pre-split:                                 ; preds = %.preheader
  %.pr = load i64, ptr %4, align 8, !tbaa !9
  %.not = icmp eq i64 %.pr, 0
  br i1 %.not, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %2, %thread-pre-split
  %8 = call i32 @asn1_utf8char_from_bytes(ptr noundef nonnull %5, ptr noundef nonnull %3, ptr noundef nonnull %4)
  %.not2 = icmp eq i32 %8, 1
  br i1 %.not2, label %thread-pre-split, label %.loopexit, !llvm.loop !11

.loopexit:                                        ; preds = %thread-pre-split, %.preheader, %2
  %.0 = phi i32 [ 0, %2 ], [ 1, %thread-pre-split ], [ 0, %.preheader ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #2
  ret i32 %.0
}

; Function Attrs: nounwind uwtable
declare hidden i32 @asn1_utf8char_from_bytes(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #1

attributes #0 = { mustprogress 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 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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