; LLVM IR from gost-engine/engine :: gost_pmeth (unpack_cp_signature)

; 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"

@.str = external hidden unnamed_addr constant [65 x i8], align 1

; 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 ptr @unpack_cp_signature(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = 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 8, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store ptr null, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store ptr null, ptr %8, align 8, !tbaa !5
  %10 = call ptr @ECDSA_SIG_new()
  store ptr %10, ptr %6, align 8, !tbaa !5
  %11 = load ptr, ptr %6, align 8, !tbaa !5
  %12 = icmp eq ptr %11, null
  br i1 %12, label %13, label %14

13:                                               ; preds = %2
  call void @ERR_GOST_error(i32 noundef 136, i32 noundef 786688, ptr noundef @.str, i32 noundef 527)
  store ptr null, ptr %3, align 8
  store i32 1, ptr %9, align 4
  br label %33

14:                                               ; preds = %2
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = load i64, ptr %5, align 8, !tbaa !9
  %17 = udiv i64 %16, 2
  %18 = trunc i64 %17 to i32
  %19 = call ptr @BN_bin2bn(ptr noundef %15, i32 noundef %18, ptr noundef null)
  store ptr %19, ptr %8, align 8, !tbaa !5
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = load i64, ptr %5, align 8, !tbaa !9
  %22 = udiv i64 %21, 2
  %23 = getelementptr inbounds i8, ptr %20, i64 %22
  %24 = load i64, ptr %5, align 8, !tbaa !9
  %25 = udiv i64 %24, 2
  %26 = trunc i64 %25 to i32
  %27 = call ptr @BN_bin2bn(ptr noundef %23, i32 noundef %26, ptr noundef null)
  store ptr %27, ptr %7, align 8, !tbaa !5
  %28 = load ptr, ptr %6, align 8, !tbaa !5
  %29 = load ptr, ptr %7, align 8, !tbaa !5
  %30 = load ptr, ptr %8, align 8, !tbaa !5
  %31 = call i32 @ECDSA_SIG_set0(ptr noundef %28, ptr noundef %29, ptr noundef %30)
  %32 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %32, ptr %3, align 8
  store i32 1, ptr %9, align 4
  br label %33

33:                                               ; preds = %14, %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %34 = load ptr, ptr %3, align 8
  ret ptr %34
}

declare ptr @ECDSA_SIG_new() #2

declare void @ERR_GOST_error(i32 noundef, i32 noundef, ptr noundef, i32 noundef) #2

declare ptr @BN_bin2bn(ptr noundef, i32 noundef, ptr noundef) #2

declare i32 @ECDSA_SIG_set0(ptr noundef, ptr noundef, ptr noundef) #2

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 = { "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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !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"

@.str = external hidden unnamed_addr constant [65 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local ptr @unpack_cp_signature(ptr noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = tail call ptr @ECDSA_SIG_new() #2
  %4 = icmp eq ptr %3, null
  br i1 %4, label %5, label %6

5:                                                ; preds = %2
  tail call void @ERR_GOST_error(i32 noundef 136, i32 noundef 786688, ptr noundef nonnull @.str, i32 noundef 527) #2
  br label %13

6:                                                ; preds = %2
  %7 = lshr i64 %1, 1
  %8 = trunc i64 %7 to i32
  %9 = tail call ptr @BN_bin2bn(ptr noundef %0, i32 noundef %8, ptr noundef null) #2
  %10 = getelementptr inbounds i8, ptr %0, i64 %7
  %11 = tail call ptr @BN_bin2bn(ptr noundef %10, i32 noundef %8, ptr noundef null) #2
  %12 = tail call i32 @ECDSA_SIG_set0(ptr noundef nonnull %3, ptr noundef %11, ptr noundef %9) #2
  br label %13

13:                                               ; preds = %6, %5
  ret ptr %3
}

declare ptr @ECDSA_SIG_new() local_unnamed_addr #1

declare void @ERR_GOST_error(i32 noundef, i32 noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

declare ptr @BN_bin2bn(ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #1

declare i32 @ECDSA_SIG_set0(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #1

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 = { "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)"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,TailCallElimPass