artiq: reimplement reformat_rpc_arg for ndarray

nac3artiq/src/codegen.rs

@@ -1,17 +1,20 @@
 use nac3core::{
     codegen::{
-        classes::{
+        classes::{ListValue, NDArrayValue, RangeValue, UntypedArrayLikeAccessor},
-            ArrayLikeIndexer, ArrayLikeValue, ArraySliceValue, ListValue, NDArrayType,
-            NDArrayValue, ProxyType, ProxyValue, RangeValue, UntypedArrayLikeAccessor,
-        },
         expr::{destructure_range, gen_call},
         irrt::call_ndarray_calc_size,
-        llvm_intrinsics::{call_int_smax, call_memcpy_generic, call_stackrestore, call_stacksave},
+        llvm_intrinsics::{call_int_smax, call_stackrestore, call_stacksave},
+        model::*,
+        object::{any::AnyObject, ndarray::NDArrayObject},
         stmt::{gen_block, gen_for_callback_incrementing, gen_if_callback, gen_with},
         CodeGenContext, CodeGenerator,
     },
     symbol_resolver::ValueEnum,
-    toplevel::{helper::PrimDef, numpy::unpack_ndarray_var_tys, DefinitionId, GenCall},
+    toplevel::{
+        helper::{extract_ndims, PrimDef},
+        numpy::unpack_ndarray_var_tys,
+        DefinitionId, GenCall,
+    },
     typecheck::typedef::{iter_type_vars, FunSignature, FuncArg, Type, TypeEnum, VarMap},
 };
 
@@ -20,8 +23,8 @@ use nac3parser::ast::{Expr, ExprKind, Located, Stmt, StmtKind, StrRef};
 use inkwell::{
     context::Context,
     module::Linkage,
-    types::{BasicType, IntType},
+    types::IntType,
-    values::{BasicValueEnum, PointerValue, StructValue},
+    values::{BasicValue, BasicValueEnum, PointerValue, StructValue},
     AddressSpace, IntPredicate, OptimizationLevel,
 };
 
@@ -457,55 +460,42 @@ fn format_rpc_arg<'ctx>(
             // NAC3: NDArray = { usize, usize*, T* }
             // libproto_artiq: NDArray = [data[..], dim_sz[..]]
 
-            let llvm_i1 = ctx.ctx.bool_type();
+            let ndarray = AnyObject { ty: arg_ty, value: arg };
-            let llvm_usize = generator.get_size_type(ctx.ctx);
+            let ndarray = NDArrayObject::from_object(generator, ctx, ndarray);
 
-            let (elem_ty, _) = unpack_ndarray_var_tys(&mut ctx.unifier, arg_ty);
+            let dtype = ctx.get_llvm_type(generator, ndarray.dtype);
-            let llvm_arg_ty =
+            let ndims = ndarray.ndims_llvm(generator, ctx.ctx);
-                NDArrayType::new(generator, ctx.ctx, ctx.get_llvm_type(generator, elem_ty));
-            let llvm_arg = NDArrayValue::from_ptr_val(arg.into_pointer_value(), llvm_usize, None);
 
-            let llvm_usize_sizeof = ctx
+            // `ndarray.data` is possibly not contiguous, and we need it to be contiguous for
-                .builder
+            // the reader.
-                .build_int_truncate_or_bit_cast(llvm_arg_ty.size_type().size_of(), llvm_usize, "")
+            // Turning it into a ContiguousNDArray to get a `data` that is contiguous.
-                .unwrap();
+            let carray = ndarray.make_contiguous_ndarray(generator, ctx, Any(dtype));
-            let llvm_pdata_sizeof = ctx
-                .builder
-                .build_int_truncate_or_bit_cast(
-                    llvm_arg_ty.element_type().ptr_type(AddressSpace::default()).size_of(),
-                    llvm_usize,
-                    "",
-                )
-                .unwrap();
 
-            let dims_buf_sz =
+            let sizeof_sizet = Int(SizeT).size_of(generator, ctx.ctx);
-                ctx.builder.build_int_mul(llvm_arg.load_ndims(ctx), llvm_usize_sizeof, "").unwrap();
+            let sizeof_sizet = Int(SizeT).truncate_or_bit_cast(generator, ctx, sizeof_sizet);
 
-            let buffer_size =
+            let sizeof_pdata = Ptr(Any(dtype)).size_of(generator, ctx.ctx);
-                ctx.builder.build_int_add(dims_buf_sz, llvm_pdata_sizeof, "").unwrap();
+            let sizeof_pdata = Int(SizeT).truncate_or_bit_cast(generator, ctx, sizeof_pdata);
 
-            let buffer = ctx.builder.build_array_alloca(llvm_i8, buffer_size, "rpc.arg").unwrap();
+            let sizeof_buf_shape = sizeof_sizet.mul(ctx, ndims);
-            let buffer = ArraySliceValue::from_ptr_val(buffer, buffer_size, Some("rpc.arg"));
+            let sizeof_buf = sizeof_buf_shape.add(ctx, sizeof_pdata);
 
-            call_memcpy_generic(
+            // buf = { data: void*, shape: [size_t; ndims]; }
-                ctx,
+            let buf = Int(Byte).array_alloca(generator, ctx, sizeof_buf.value);
-                buffer.base_ptr(ctx, generator),
+            let buf_data = buf;
-                llvm_arg.ptr_to_data(ctx),
+            let buf_shape = buf_data.offset(ctx, sizeof_pdata.value);
-                llvm_pdata_sizeof,
-                llvm_i1.const_zero(),
-            );
 
-            let pbuffer_dims_begin =
+            // Write to `buf->data`
-                unsafe { buffer.ptr_offset_unchecked(ctx, generator, &llvm_pdata_sizeof, None) };
+            let carray_data = carray.get(generator, ctx, |f| f.data); // has type Ptr<Any>
-            call_memcpy_generic(
+            let carray_data = carray_data.pointer_cast(generator, ctx, Int(Byte));
-                ctx,
+            buf_data.copy_from(generator, ctx, carray_data, sizeof_pdata.value);
-                pbuffer_dims_begin,
-                llvm_arg.dim_sizes().base_ptr(ctx, generator),
-                dims_buf_sz,
-                llvm_i1.const_zero(),
-            );
 
-            buffer.base_ptr(ctx, generator)
+            // Write to `buf->shape`
+            let carray_shape = ndarray.instance.get(generator, ctx, |f| f.shape);
+            let carray_shape_i8 = carray_shape.pointer_cast(generator, ctx, Int(Byte));
+            buf_shape.copy_from(generator, ctx, carray_shape_i8, sizeof_buf_shape.value);
+
+            buf.value
         }
 
         _ => {
@@ -566,8 +556,10 @@ fn format_rpc_ret<'ctx>(
 
     let result = match &*ctx.unifier.get_ty_immutable(ret_ty) {
         TypeEnum::TObj { obj_id, .. } if *obj_id == PrimDef::NDArray.id() => {
-            let llvm_i1 = ctx.ctx.bool_type();
+            // FIXME: It is possible to rewrite everything more neatly with `Model<'ctx>`, but this is not too important.
-            let llvm_usize = generator.get_size_type(ctx.ctx);
+
+            let num_0 = Int(SizeT).const_0(generator, ctx.ctx);
+            let num_8 = Int(SizeT).const_int(generator, ctx.ctx, 8, false);
 
             // Round `val` up to its modulo `power_of_two`
             let round_up = |ctx: &mut CodeGenContext<'ctx, '_>,
@@ -593,60 +585,36 @@ fn format_rpc_ret<'ctx>(
                     .unwrap()
             };
 
-            // Setup types
-            let (elem_ty, ndims) = unpack_ndarray_var_tys(&mut ctx.unifier, ret_ty);
-            let llvm_elem_ty = ctx.get_llvm_type(generator, elem_ty);
-            let llvm_ret_ty = NDArrayType::new(generator, ctx.ctx, llvm_elem_ty);
-
             // Allocate the resulting ndarray
             // A condition after format_rpc_ret ensures this will not be popped this off.
-            let ndarray = llvm_ret_ty.new_value(generator, ctx, Some("rpc.result"));
+            let (dtype, ndims) = unpack_ndarray_var_tys(&mut ctx.unifier, ret_ty);
+            let ndims = extract_ndims(&ctx.unifier, ndims);
+            let ndarray = NDArrayObject::alloca(generator, ctx, dtype, ndims);
 
-            // Setup ndims
+            // NOTE: Current content of `ndarray`:
-            let ndims =
+            //   - * `data` - **NOT YET** allocated.
-                if let TypeEnum::TLiteral { values, .. } = &*ctx.unifier.get_ty_immutable(ndims) {
+            //   - * `itemsize` - initialized to be size_of(dtype).
-                    assert_eq!(values.len(), 1);
+            //   - * `ndims` - initialized.
+            //   - * `shape` - allocated; has uninitialized values.
+            //   - * `strides` - allocated; has uninitialized values.
 
-                    u64::try_from(values[0].clone()).unwrap()
+            let itemsize = ndarray.instance.get(generator, ctx, |f| f.itemsize); // Same as doing a `ctx.get_llvm_type` on `dtype` and get its `size_of()`.
-                } else {
+            let dtype_llvm = ctx.get_llvm_type(generator, dtype);
-                    unreachable!();
-                };
-            // Set `ndarray.ndims`
-            ndarray.store_ndims(ctx, generator, llvm_usize.const_int(ndims, false));
-            // Allocate `ndarray.shape` [size_t; ndims]
-            ndarray.create_dim_sizes(ctx, llvm_usize, ndarray.load_ndims(ctx));
-
-            /*
-                ndarray now:
-                  - .ndims: initialized
-                  - .shape: allocated but uninitialized .shape
-                  - .data: uninitialized
-            */
-
-            let llvm_usize_sizeof = ctx
-                .builder
-                .build_int_truncate_or_bit_cast(llvm_usize.size_of(), llvm_usize, "")
-                .unwrap();
-            let llvm_pdata_sizeof = ctx
-                .builder
-                .build_int_truncate_or_bit_cast(
-                    llvm_ret_ty.element_type().size_of().unwrap(),
-                    llvm_usize,
-                    "",
-                )
-                .unwrap();
-            let llvm_elem_sizeof = ctx
-                .builder
-                .build_int_truncate_or_bit_cast(llvm_elem_ty.size_of().unwrap(), llvm_usize, "")
-                .unwrap();
 
             // Allocates a buffer for the initial RPC'ed object, which is guaranteed to be
             // (4 + 4 * ndims) bytes with 8-byte alignment
-            let sizeof_dims =
+            let sizeof_size_t = Int(SizeT).size_of(generator, ctx.ctx);
-                ctx.builder.build_int_mul(ndarray.load_ndims(ctx), llvm_usize_sizeof, "").unwrap();
+            let sizeof_size_t = Int(SizeT).z_extend_or_truncate(generator, ctx, sizeof_size_t); // sizeof(size_t)
-            let unaligned_buffer_size =
+
-                ctx.builder.build_int_add(sizeof_dims, llvm_pdata_sizeof, "").unwrap();
+            let sizeof_ptr = Ptr(Int(Byte)).size_of(generator, ctx.ctx);
-            let buffer_size = round_up(ctx, unaligned_buffer_size, llvm_usize.const_int(8, false));
+            let sizeof_ptr = Int(SizeT).z_extend_or_truncate(generator, ctx, sizeof_ptr); // sizeof(uint8_t*)
+
+            let sizeof_shape = ndarray.ndims_llvm(generator, ctx.ctx).mul(ctx, sizeof_size_t); // sizeof([size_t; ndims]); same as the # of bytes of `ndarray.shape`.
+
+            // Size of the buffer for the initial `rpc_recv()`.
+            let unaligned_buffer_size = sizeof_ptr.add(ctx, sizeof_shape); // sizeof(uint8_t*) + sizeof([size_t; ndims]).
+            let buffer_size = round_up(ctx, unaligned_buffer_size.value, num_8.value);
+            let buffer_size = unsafe { Int(SizeT).believe_value(buffer_size) };
 
             let stackptr = call_stacksave(ctx, None);
             // Just to be absolutely sure, alloca in [i8 x 8] slices to force 8-byte alignment
@@ -654,9 +622,7 @@ fn format_rpc_ret<'ctx>(
                 .builder
                 .build_array_alloca(
                     llvm_i8_8,
-                    ctx.builder
+                    ctx.builder.build_int_unsigned_div(buffer_size.value, num_8.value, "").unwrap(),
-                        .build_int_unsigned_div(buffer_size, llvm_usize.const_int(8, false), "")
-                        .unwrap(),
                     "rpc.buffer",
                 )
                 .unwrap();
@@ -665,7 +631,7 @@ fn format_rpc_ret<'ctx>(
                 .build_bitcast(buffer, llvm_pi8, "")
                 .map(BasicValueEnum::into_pointer_value)
                 .unwrap();
-            let buffer = ArraySliceValue::from_ptr_val(buffer, buffer_size, None);
+            let buffer = unsafe { Ptr(Int(Byte)).believe_value(buffer) };
 
             // The first call to `rpc_recv` reads the top-level ndarray object: [pdata, shape]
             //
@@ -673,24 +639,20 @@ fn format_rpc_ret<'ctx>(
             let ndarray_nbytes = ctx
                 .build_call_or_invoke(
                     rpc_recv,
-                    &[buffer.base_ptr(ctx, generator).into()], // Reads [usize; ndims]. NOTE: We are allocated [size_t; ndims].
+                    &[buffer.value.into()], // Reads [usize; ndims]
                     "rpc.size.next",
                 )
                 .map(BasicValueEnum::into_int_value)
                 .unwrap();
+            let ndarray_nbytes = unsafe { Int(SizeT).believe_value(ndarray_nbytes) };
 
             // debug_assert(ndarray_nbytes > 0)
             if ctx.registry.llvm_options.opt_level == OptimizationLevel::None {
+                let cmp = ndarray_nbytes.compare(ctx, IntPredicate::UGT, num_0);
+
                 ctx.make_assert(
                     generator,
-                    ctx.builder
+                    cmp.value,
-                        .build_int_compare(
-                            IntPredicate::UGT,
-                            ndarray_nbytes,
-                            ndarray_nbytes.get_type().const_zero(),
-                            "",
-                        )
-                        .unwrap(),
                     "0:AssertionError",
                     "Unexpected RPC termination for ndarray - Expected data buffer next",
                     [None, None, None],
@@ -699,49 +661,39 @@ fn format_rpc_ret<'ctx>(
             }
 
             // Copy shape from the buffer to `ndarray.shape`.
-            let pbuffer_dims =
+            // We need to skip the first `sizeof(uint8_t*)` bytes to skip the `pdata` in `[pdata, shape]`.
-                unsafe { buffer.ptr_offset_unchecked(ctx, generator, &llvm_pdata_sizeof, None) };
+            let pbuffer_shape = buffer.offset(ctx, sizeof_ptr.value);
+            let pbuffer_shape = pbuffer_shape.pointer_cast(generator, ctx, Int(SizeT));
+
+            // Copy shape from buffer to `ndarray.shape`
+            ndarray.copy_shape_from_array(generator, ctx, pbuffer_shape);
 
-            call_memcpy_generic(
-                ctx,
-                ndarray.dim_sizes().base_ptr(ctx, generator),
-                pbuffer_dims,
-                sizeof_dims,
-                llvm_i1.const_zero(),
-            );
             // Restore stack from before allocation of buffer
             call_stackrestore(ctx, stackptr);
 
             // Allocate `ndarray.data`.
             // `ndarray.shape` must be initialized beforehand in this implementation
             //   (for ndarray.create_data() to know how many elements to allocate)
-            let num_elements =
+            ndarray.create_data(generator, ctx); // NOTE: the strides of `ndarray` has also been set to contiguous in `::create_data()`.
-                call_ndarray_calc_size(generator, ctx, &ndarray.dim_sizes(), (None, None));
 
             // debug_assert(nelems * sizeof(T) >= ndarray_nbytes)
             if ctx.registry.llvm_options.opt_level == OptimizationLevel::None {
-                let sizeof_data =
+                let num_elements = ndarray.size(generator, ctx);
-                    ctx.builder.build_int_mul(num_elements, llvm_elem_sizeof, "").unwrap();
+
+                let expected_ndarray_nbytes = num_elements.mul(ctx, itemsize);
+                let cmp = expected_ndarray_nbytes.compare(ctx, IntPredicate::UGE, ndarray_nbytes);
 
                 ctx.make_assert(
                     generator,
-                    ctx.builder.build_int_compare(IntPredicate::UGE,
+                    cmp.value,
-                        sizeof_data,
-                        ndarray_nbytes,
-                        "",
-                    ).unwrap(),
                     "0:AssertionError",
                     "Unexpected allocation size request for ndarray data - Expected up to {0} bytes, got {1} bytes",
-                    [Some(sizeof_data), Some(ndarray_nbytes), None],
+                    [Some(expected_ndarray_nbytes.value), Some(ndarray_nbytes.value), None],
                     ctx.current_loc,
                 );
             }
 
-            ndarray.create_data(ctx, llvm_elem_ty, num_elements);
+            let ndarray_data = ndarray.instance.get(generator, ctx, |f| f.data);
-
-            let ndarray_data = ndarray.data().base_ptr(ctx, generator);
-            let ndarray_data_i8 =
-                ctx.builder.build_pointer_cast(ndarray_data, llvm_pi8, "").unwrap();
 
             // NOTE: Currently on `prehead_bb`
             ctx.builder.build_unconditional_branch(head_bb).unwrap();
@@ -750,7 +702,7 @@ fn format_rpc_ret<'ctx>(
             ctx.builder.position_at_end(head_bb);
 
             let phi = ctx.builder.build_phi(llvm_pi8, "rpc.ptr").unwrap();
-            phi.add_incoming(&[(&ndarray_data_i8, prehead_bb)]);
+            phi.add_incoming(&[(&ndarray_data.value, prehead_bb)]);
 
             let alloc_size = ctx
                 .build_call_or_invoke(rpc_recv, &[phi.as_basic_value()], "rpc.size.next")
@@ -765,12 +717,12 @@ fn format_rpc_ret<'ctx>(
 
             ctx.builder.position_at_end(alloc_bb);
             // Align the allocation to sizeof(T)
-            let alloc_size = round_up(ctx, alloc_size, llvm_elem_sizeof);
+            let alloc_size = round_up(ctx, alloc_size, itemsize.value);
             let alloc_ptr = ctx
                 .builder
                 .build_array_alloca(
-                    llvm_elem_ty,
+                    dtype_llvm,
-                    ctx.builder.build_int_unsigned_div(alloc_size, llvm_elem_sizeof, "").unwrap(),
+                    ctx.builder.build_int_unsigned_div(alloc_size, itemsize.value, "").unwrap(),
                     "rpc.alloc",
                 )
                 .unwrap();
@@ -780,7 +732,7 @@ fn format_rpc_ret<'ctx>(
             ctx.builder.build_unconditional_branch(head_bb).unwrap();
 
             ctx.builder.position_at_end(tail_bb);
-            ndarray.as_base_value().into()
+            ndarray.instance.value.as_basic_value_enum()
         }
 
         _ => {