; LLVM IR from CROSS-signature/CROSS-implementation :: Additional_Implementations/KAT_Generation/lib (KAT_NIST_rng)

; 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.KAT_NIST_AES256_CTR_DRBG_struct = type { [32 x i8], [16 x i8], i32 }

@DRBG_ctx = external dso_local global %struct.KAT_NIST_AES256_CTR_DRBG_struct, align 4

; 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) #0

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nounwind uwtable
define dso_local void @KAT_NIST_randombytes_init(ptr noundef %0, ptr noundef %1, i32 noundef %2) #3 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca [48 x i8], align 16
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 48, ptr %7) #4
  call void @llvm.memset.p0.i64(ptr align 16 %7, i8 0, i64 48, i1 false)
  %9 = getelementptr inbounds [48 x i8], ptr %7, i64 0, i64 0
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %9, ptr align 1 %10, i64 48, i1 false)
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = icmp ne ptr %11, null
  br i1 %12, label %13, label %36

13:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %32, %13
  %15 = load i32, ptr %8, align 4, !tbaa !9
  %16 = icmp slt i32 %15, 48
  br i1 %16, label %18, label %17

17:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  br label %35

18:                                               ; preds = %14
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = load i32, ptr %8, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds i8, ptr %19, i64 %21
  %23 = load i8, ptr %22, align 1, !tbaa !11
  %24 = zext i8 %23 to i32
  %25 = load i32, ptr %8, align 4, !tbaa !9
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [48 x i8], ptr %7, i64 0, i64 %26
  %28 = load i8, ptr %27, align 1, !tbaa !11
  %29 = zext i8 %28 to i32
  %30 = xor i32 %29, %24
  %31 = trunc i32 %30 to i8
  store i8 %31, ptr %27, align 1, !tbaa !11
  br label %32

32:                                               ; preds = %18
  %33 = load i32, ptr %8, align 4, !tbaa !9
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %8, align 4, !tbaa !9
  br label %14, !llvm.loop !12

35:                                               ; preds = %17
  br label %36

36:                                               ; preds = %35, %3
  call void @llvm.memset.p0.i64(ptr align 4 @DRBG_ctx, i8 0, i64 32, i1 false)
  call void @llvm.memset.p0.i64(ptr align 4 getelementptr inbounds (%struct.KAT_NIST_AES256_CTR_DRBG_struct, ptr @DRBG_ctx, i32 0, i32 1), i8 0, i64 16, i1 false)
  %37 = getelementptr inbounds [48 x i8], ptr %7, i64 0, i64 0
  call void @KAT_NIST_AES256_CTR_DRBG_Update(ptr noundef %37, ptr noundef @DRBG_ctx, ptr noundef getelementptr inbounds (%struct.KAT_NIST_AES256_CTR_DRBG_struct, ptr @DRBG_ctx, i32 0, i32 1))
  store i32 1, ptr getelementptr inbounds (%struct.KAT_NIST_AES256_CTR_DRBG_struct, ptr @DRBG_ctx, i32 0, i32 2), align 4, !tbaa !14
  call void @llvm.lifetime.end.p0(i64 48, ptr %7) #4
  ret void
}

; Function Attrs: nounwind uwtable
declare dso_local void @KAT_NIST_AES256_CTR_DRBG_Update(ptr noundef, ptr noundef, ptr noundef) #3

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 #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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!15, !10, i64 48}
!15 = !{!"", !7, i64 0, !7, i64 32, !10, i64 48}


; 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"

%struct.KAT_NIST_AES256_CTR_DRBG_struct = type { [32 x i8], [16 x i8], i32 }

@DRBG_ctx = external dso_local global %struct.KAT_NIST_AES256_CTR_DRBG_struct, align 4

; Function Attrs: mustprogress 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) #0

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nounwind uwtable
define dso_local void @KAT_NIST_randombytes_init(ptr nocapture noundef readonly %0, ptr noundef readonly %1, i32 noundef %2) local_unnamed_addr #3 {
  %4 = alloca [48 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 48, ptr nonnull %4) #4
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 16 dereferenceable(48) %4, ptr noundef nonnull align 1 dereferenceable(48) %0, i64 48, i1 false)
  %.not = icmp eq ptr %1, null
  br i1 %.not, label %.loopexit, label %.preheader.preheader

.preheader.preheader:                             ; preds = %3
  %5 = load <16 x i8>, ptr %1, align 1, !tbaa !5
  %6 = load <16 x i8>, ptr %4, align 16, !tbaa !5
  %7 = xor <16 x i8> %6, %5
  store <16 x i8> %7, ptr %4, align 16, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %1, i64 16
  %9 = getelementptr inbounds i8, ptr %4, i64 16
  %10 = load <16 x i8>, ptr %8, align 1, !tbaa !5
  %11 = load <16 x i8>, ptr %9, align 16, !tbaa !5
  %12 = xor <16 x i8> %11, %10
  store <16 x i8> %12, ptr %9, align 16, !tbaa !5
  %13 = getelementptr inbounds i8, ptr %1, i64 32
  %14 = getelementptr inbounds i8, ptr %4, i64 32
  %15 = load <16 x i8>, ptr %13, align 1, !tbaa !5
  %16 = load <16 x i8>, ptr %14, align 16, !tbaa !5
  %17 = xor <16 x i8> %16, %15
  store <16 x i8> %17, ptr %14, align 16, !tbaa !5
  br label %.loopexit

.loopexit:                                        ; preds = %.preheader.preheader, %3
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 4 dereferenceable(48) @DRBG_ctx, i8 0, i64 48, i1 false)
  call void @KAT_NIST_AES256_CTR_DRBG_Update(ptr noundef nonnull %4, ptr noundef nonnull @DRBG_ctx, ptr noundef nonnull getelementptr inbounds (i8, ptr @DRBG_ctx, i64 32))
  store i32 1, ptr getelementptr inbounds (i8, ptr @DRBG_ctx, i64 48), align 4, !tbaa !8
  call void @llvm.lifetime.end.p0(i64 48, ptr nonnull %4) #4
  ret void
}

; Function Attrs: nounwind uwtable
declare dso_local void @KAT_NIST_AES256_CTR_DRBG_Update(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #3

attributes #0 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 #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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !10, i64 48}
!9 = !{!"", !6, i64 0, !6, i64 32, !10, i64 48}
!10 = !{!"int", !6, i64 0}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,LoopSimplifyPass,MemCpyOptPass,PostOrderFunctionAttrsPass,SLPVectorizerPass,SROAPass,SimplifyCFGPass,TailCallElimPass