blob: 208054a88b298c516315c8ba5e5819e2b1d04e84 [file] [log] [blame]
// Copyright 2021 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/transform/hlsl.h"
#include <utility>
#include "src/program_builder.h"
#include "src/transform/calculate_array_length.h"
#include "src/transform/canonicalize_entry_point_io.h"
#include "src/transform/decompose_storage_access.h"
#include "src/transform/external_texture_transform.h"
#include "src/transform/inline_pointer_lets.h"
#include "src/transform/manager.h"
#include "src/transform/promote_initializers_to_const_var.h"
#include "src/transform/simplify.h"
namespace tint {
namespace transform {
Hlsl::Hlsl() = default;
Hlsl::~Hlsl() = default;
Output Hlsl::Run(const Program* in, const DataMap&) {
Manager manager;
DataMap data;
manager.Add<CanonicalizeEntryPointIO>();
manager.Add<InlinePointerLets>();
// Simplify cleans up messy `*(&(expr))` expressions from InlinePointerLets.
manager.Add<Simplify>();
// DecomposeStorageAccess must come after InlinePointerLets as we cannot take
// the address of calls to DecomposeStorageAccess::Intrinsic. Must also come
// after Simplify, as we need to fold away the address-of and defers of
// `*(&(intrinsic_load()))` expressions.
manager.Add<DecomposeStorageAccess>();
// CalculateArrayLength must come after DecomposeStorageAccess, as
// DecomposeStorageAccess special-cases the arrayLength() intrinsic, which
// will be transformed by CalculateArrayLength
manager.Add<CalculateArrayLength>();
manager.Add<ExternalTextureTransform>();
manager.Add<PromoteInitializersToConstVar>();
data.Add<CanonicalizeEntryPointIO::Config>(
CanonicalizeEntryPointIO::BuiltinStyle::kStructMember);
auto out = manager.Run(in, data);
if (!out.program.IsValid()) {
return out;
}
ProgramBuilder builder;
CloneContext ctx(&builder, &out.program);
AddEmptyEntryPoint(ctx);
ctx.Clone();
return Output{Program(std::move(builder))};
}
void Hlsl::AddEmptyEntryPoint(CloneContext& ctx) const {
for (auto* func : ctx.src->AST().Functions()) {
if (func->IsEntryPoint()) {
return;
}
}
ctx.dst->Func(ctx.dst->Symbols().New("unused_entry_point"), {},
ctx.dst->ty.void_(), {},
{ctx.dst->Stage(ast::PipelineStage::kCompute)});
}
} // namespace transform
} // namespace tint