; LLVM IR from square/subzero :: core/trezor-crypto (bignum)

; 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.bignum256 = type { [9 x i32] }

; Function Attrs: nounwind uwtable
define dso_local void @bn_read_uint64(i64 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  %5 = load i64, ptr %3, align 8, !tbaa !5
  %6 = and i64 %5, 1073741823
  %7 = trunc i64 %6 to i32
  %8 = load ptr, ptr %4, align 8, !tbaa !9
  %9 = getelementptr inbounds %struct.bignum256, ptr %8, i32 0, i32 0
  %10 = getelementptr inbounds [9 x i32], ptr %9, i64 0, i64 0
  store i32 %7, ptr %10, align 4, !tbaa !11
  %11 = load i64, ptr %3, align 8, !tbaa !5
  %12 = lshr i64 %11, 30
  store i64 %12, ptr %3, align 8, !tbaa !5
  %13 = and i64 %12, 1073741823
  %14 = trunc i64 %13 to i32
  %15 = load ptr, ptr %4, align 8, !tbaa !9
  %16 = getelementptr inbounds %struct.bignum256, ptr %15, i32 0, i32 0
  %17 = getelementptr inbounds [9 x i32], ptr %16, i64 0, i64 1
  store i32 %14, ptr %17, align 4, !tbaa !11
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = lshr i64 %18, 30
  store i64 %19, ptr %3, align 8, !tbaa !5
  %20 = trunc i64 %19 to i32
  %21 = load ptr, ptr %4, align 8, !tbaa !9
  %22 = getelementptr inbounds %struct.bignum256, ptr %21, i32 0, i32 0
  %23 = getelementptr inbounds [9 x i32], ptr %22, i64 0, i64 2
  store i32 %20, ptr %23, align 4, !tbaa !11
  %24 = load ptr, ptr %4, align 8, !tbaa !9
  %25 = getelementptr inbounds %struct.bignum256, ptr %24, i32 0, i32 0
  %26 = getelementptr inbounds [9 x i32], ptr %25, i64 0, i64 3
  store i32 0, ptr %26, align 4, !tbaa !11
  %27 = load ptr, ptr %4, align 8, !tbaa !9
  %28 = getelementptr inbounds %struct.bignum256, ptr %27, i32 0, i32 0
  %29 = getelementptr inbounds [9 x i32], ptr %28, i64 0, i64 4
  store i32 0, ptr %29, align 4, !tbaa !11
  %30 = load ptr, ptr %4, align 8, !tbaa !9
  %31 = getelementptr inbounds %struct.bignum256, ptr %30, i32 0, i32 0
  %32 = getelementptr inbounds [9 x i32], ptr %31, i64 0, i64 5
  store i32 0, ptr %32, align 4, !tbaa !11
  %33 = load ptr, ptr %4, align 8, !tbaa !9
  %34 = getelementptr inbounds %struct.bignum256, ptr %33, i32 0, i32 0
  %35 = getelementptr inbounds [9 x i32], ptr %34, i64 0, i64 6
  store i32 0, ptr %35, align 4, !tbaa !11
  %36 = load ptr, ptr %4, align 8, !tbaa !9
  %37 = getelementptr inbounds %struct.bignum256, ptr %36, i32 0, i32 0
  %38 = getelementptr inbounds [9 x i32], ptr %37, i64 0, i64 7
  store i32 0, ptr %38, align 4, !tbaa !11
  %39 = load ptr, ptr %4, align 8, !tbaa !9
  %40 = getelementptr inbounds %struct.bignum256, ptr %39, i32 0, i32 0
  %41 = getelementptr inbounds [9 x i32], ptr %40, i64 0, i64 8
  store i32 0, ptr %41, align 4, !tbaa !11
  ret void
}

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" }

!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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !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 nofree norecurse nosync nounwind willreturn memory(argmem: write) uwtable
define dso_local void @bn_read_uint64(i64 noundef %0, ptr nocapture noundef writeonly %1) local_unnamed_addr #0 {
  %3 = trunc i64 %0 to i32
  %4 = and i32 %3, 1073741823
  store i32 %4, ptr %1, align 4, !tbaa !5
  %5 = lshr i64 %0, 30
  %6 = trunc i64 %5 to i32
  %7 = and i32 %6, 1073741823
  %8 = getelementptr inbounds i8, ptr %1, i64 4
  store i32 %7, ptr %8, align 4, !tbaa !5
  %9 = lshr i64 %0, 60
  %10 = trunc nuw nsw i64 %9 to i32
  %11 = getelementptr inbounds i8, ptr %1, i64 8
  store i32 %10, ptr %11, align 4, !tbaa !5
  %12 = getelementptr inbounds i8, ptr %1, i64 12
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 4 dereferenceable(24) %12, i8 0, i64 24, i1 false)
  ret void
}

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

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

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InstCombinePass,MemCpyOptPass,PostOrderFunctionAttrsPass,SROAPass,TailCallElimPass