; LLVM IR from gost-engine/engine :: gost89 (cryptopro_key_meshing)

; 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"

@CryptoProKeyMeshingKey = external dso_local constant [32 x i8], align 16

; 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
declare dso_local void @gostcrypt(ptr noundef, ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local void @gost_dec(ptr noundef, ptr noundef, ptr noundef, i32 noundef) #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

; Function Attrs: nounwind uwtable
declare dso_local void @gost_key(ptr noundef, ptr noundef) #1

declare void @OPENSSL_cleanse(ptr noundef, i64 noundef) #3

; Function Attrs: nounwind uwtable
define dso_local void @cryptopro_key_meshing(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca [32 x i8], align 16
  %6 = alloca [8 x i8], align 1
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 32, ptr %5) #4
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = getelementptr inbounds [32 x i8], ptr %5, i64 0, i64 0
  call void @gost_dec(ptr noundef %7, ptr noundef @CryptoProKeyMeshingKey, ptr noundef %8, i32 noundef 4)
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds [32 x i8], ptr %5, i64 0, i64 0
  call void @gost_key(ptr noundef %9, ptr noundef %10)
  %11 = getelementptr inbounds [32 x i8], ptr %5, i64 0, i64 0
  call void @OPENSSL_cleanse(ptr noundef %11, i64 noundef 32)
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = icmp ne ptr %12, null
  br i1 %13, label %14, label %21

14:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds [8 x i8], ptr %6, i64 0, i64 0
  call void @gostcrypt(ptr noundef %15, ptr noundef %16, ptr noundef %17)
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds [8 x i8], ptr %6, i64 0, i64 0
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %18, ptr align 1 %19, i64 8, i1 false)
  %20 = getelementptr inbounds [8 x i8], ptr %6, i64 0, i64 0
  call void @OPENSSL_cleanse(ptr noundef %20, i64 noundef 8)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  br label %21

21:                                               ; preds = %14, %2
  call void @llvm.lifetime.end.p0(i64 32, ptr %5) #4
  ret void
}

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { "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 #4 = { 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"}


; 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"

@CryptoProKeyMeshingKey = external dso_local constant [32 x i8], align 16

; 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
declare dso_local void @gostcrypt(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local void @gost_dec(ptr noundef, ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local void @gost_key(ptr noundef, ptr noundef) local_unnamed_addr #1

declare void @OPENSSL_cleanse(ptr noundef, i64 noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
define dso_local void @cryptopro_key_meshing(ptr noundef %0, ptr noundef %1) local_unnamed_addr #1 {
  %3 = alloca [32 x i8], align 16
  %4 = alloca [8 x i8], align 8
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %3) #3
  call void @gost_dec(ptr noundef %0, ptr noundef nonnull @CryptoProKeyMeshingKey, ptr noundef nonnull %3, i32 noundef 4)
  call void @gost_key(ptr noundef %0, ptr noundef nonnull %3)
  call void @OPENSSL_cleanse(ptr noundef nonnull %3, i64 noundef 32) #3
  %.not = icmp eq ptr %1, null
  br i1 %.not, label %7, label %5

5:                                                ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  call void @gostcrypt(ptr noundef %0, ptr noundef nonnull %1, ptr noundef nonnull %4)
  %6 = load i64, ptr %4, align 8
  store i64 %6, ptr %1, align 1
  call void @OPENSSL_cleanse(ptr noundef nonnull %4, i64 noundef 8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  br label %7

7:                                                ; preds = %5, %2
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #3
  ret void
}

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 = { "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)"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,SROAPass