; LLVM IR from trustwallet/wallet-core :: trezor-crypto/crypto/chacha20poly1305 (rfc7539)

; 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.chacha20poly1305_ctx = type { %struct.ECRYPT_ctx, %struct.poly1305_context }
%struct.ECRYPT_ctx = type { [16 x i32] }
%struct.poly1305_context = type { i64, [136 x i8] }

; 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 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.end.p0(i64 immarg, ptr nocapture) #0

declare void @poly1305_update(ptr noundef, ptr noundef, i64 noundef) #2

; Function Attrs: nounwind uwtable
define dso_local void @rfc7539_finish(ptr noundef %0, i64 noundef %1, i64 noundef %2, ptr noundef %3) #3 {
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca [16 x i8], align 16
  %10 = alloca [16 x i8], align 16
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !9
  store ptr %3, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr %9) #5
  call void @llvm.memset.p0.i64(ptr align 16 %9, i8 0, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 16, ptr %10) #5
  call void @llvm.memset.p0.i64(ptr align 16 %10, i8 0, i64 16, i1 false)
  %11 = getelementptr inbounds [16 x i8], ptr %10, i64 0, i64 0
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %11, ptr align 8 %6, i64 8, i1 false)
  %12 = getelementptr inbounds [16 x i8], ptr %10, i64 0, i64 0
  %13 = getelementptr inbounds i8, ptr %12, i64 8
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %13, ptr align 8 %7, i64 8, i1 false)
  %14 = load i64, ptr %7, align 8, !tbaa !9
  %15 = srem i64 %14, 16
  %16 = icmp ne i64 %15, 0
  br i1 %16, label %17, label %24

17:                                               ; preds = %4
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.chacha20poly1305_ctx, ptr %18, i32 0, i32 1
  %20 = getelementptr inbounds [16 x i8], ptr %9, i64 0, i64 0
  %21 = load i64, ptr %7, align 8, !tbaa !9
  %22 = srem i64 %21, 16
  %23 = sub nsw i64 16, %22
  call void @poly1305_update(ptr noundef %19, ptr noundef %20, i64 noundef %23)
  br label %24

24:                                               ; preds = %17, %4
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.chacha20poly1305_ctx, ptr %25, i32 0, i32 1
  %27 = getelementptr inbounds [16 x i8], ptr %10, i64 0, i64 0
  call void @poly1305_update(ptr noundef %26, ptr noundef %27, i64 noundef 16)
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.chacha20poly1305_ctx, ptr %28, i32 0, i32 1
  %30 = load ptr, ptr %8, align 8, !tbaa !5
  call void @poly1305_finish(ptr noundef %29, ptr noundef %30)
  call void @llvm.lifetime.end.p0(i64 16, ptr %10) #5
  call void @llvm.lifetime.end.p0(i64 16, ptr %9) #5
  ret void
}

; 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) #4

declare void @poly1305_finish(ptr noundef, ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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 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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #5 = { 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"

; 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 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.end.p0(i64 immarg, ptr nocapture) #0

declare void @poly1305_update(ptr noundef, ptr noundef, i64 noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
define dso_local void @rfc7539_finish(ptr noundef %0, i64 noundef %1, i64 noundef %2, ptr noundef %3) local_unnamed_addr #3 {
  %5 = alloca [16 x i8], align 16
  %6 = alloca [16 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %5) #4
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(16) %5, i8 0, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %6) #4
  store i64 %1, ptr %6, align 16
  %7 = getelementptr inbounds i8, ptr %6, i64 8
  store i64 %2, ptr %7, align 8
  %8 = srem i64 %2, 16
  %.not = icmp eq i64 %8, 0
  br i1 %.not, label %12, label %9

9:                                                ; preds = %4
  %10 = getelementptr inbounds i8, ptr %0, i64 64
  %11 = sub nsw i64 16, %8
  call void @poly1305_update(ptr noundef nonnull %10, ptr noundef nonnull %5, i64 noundef %11) #4
  br label %12

12:                                               ; preds = %9, %4
  %13 = getelementptr inbounds i8, ptr %0, i64 64
  call void @poly1305_update(ptr noundef nonnull %13, ptr noundef nonnull %6, i64 noundef 16) #4
  call void @poly1305_finish(ptr noundef nonnull %13, ptr noundef %3) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %6) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %5) #4
  ret void
}

declare void @poly1305_finish(ptr noundef, ptr noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
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 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)"}


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