| // Copyright 2020 The Dawn & Tint Authors |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // |
| // 1. Redistributions of source code must retain the above copyright notice, this |
| // list of conditions and the following disclaimer. |
| // |
| // 2. Redistributions in binary form must reproduce the above copyright notice, |
| // this list of conditions and the following disclaimer in the documentation |
| // and/or other materials provided with the distribution. |
| // |
| // 3. Neither the name of the copyright holder nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "src/tint/lang/wgsl/ast/transform/transform.h" |
| |
| #include <algorithm> |
| #include <string> |
| |
| #include "src/tint/lang/core/builtin_type.h" |
| #include "src/tint/lang/core/fluent_types.h" |
| #include "src/tint/lang/core/type/atomic.h" |
| #include "src/tint/lang/core/type/depth_multisampled_texture.h" |
| #include "src/tint/lang/core/type/reference.h" |
| #include "src/tint/lang/core/type/sampler.h" |
| #include "src/tint/lang/wgsl/program/clone_context.h" |
| #include "src/tint/lang/wgsl/program/program_builder.h" |
| #include "src/tint/lang/wgsl/resolver/resolve.h" |
| #include "src/tint/lang/wgsl/sem/block_statement.h" |
| #include "src/tint/lang/wgsl/sem/for_loop_statement.h" |
| #include "src/tint/lang/wgsl/sem/variable.h" |
| |
| using namespace tint::core::fluent_types; // NOLINT |
| |
| TINT_INSTANTIATE_TYPEINFO(tint::ast::transform::Transform); |
| |
| namespace tint::ast::transform { |
| |
| Output::Output() = default; |
| Output::Output(Program&& p) : program(std::move(p)) {} |
| Transform::Transform() = default; |
| Transform::~Transform() = default; |
| |
| Output Transform::Run(const Program& src, const DataMap& data /* = {} */) const { |
| Output output; |
| if (auto program = Apply(src, data, output.data)) { |
| output.program = std::move(program.value()); |
| } else { |
| ProgramBuilder b; |
| program::CloneContext ctx{&b, &src, /* auto_clone_symbols */ true}; |
| ctx.Clone(); |
| output.program = resolver::Resolve(b); |
| } |
| return output; |
| } |
| |
| void Transform::RemoveStatement(program::CloneContext& ctx, const Statement* stmt) { |
| auto* sem = ctx.src->Sem().Get(stmt); |
| if (auto* block = tint::As<sem::BlockStatement>(sem->Parent())) { |
| ctx.Remove(block->Declaration()->statements, stmt); |
| return; |
| } |
| if (TINT_LIKELY(tint::Is<sem::ForLoopStatement>(sem->Parent()))) { |
| ctx.Replace(stmt, static_cast<Expression*>(nullptr)); |
| return; |
| } |
| TINT_ICE() << "unable to remove statement from parent of type " << sem->TypeInfo().name; |
| } |
| |
| Type Transform::CreateASTTypeFor(program::CloneContext& ctx, const core::type::Type* ty) { |
| if (ty->Is<core::type::Void>()) { |
| return Type{}; |
| } |
| if (ty->Is<core::type::I32>()) { |
| return ctx.dst->ty.i32(); |
| } |
| if (ty->Is<core::type::U32>()) { |
| return ctx.dst->ty.u32(); |
| } |
| if (ty->Is<core::type::F16>()) { |
| return ctx.dst->ty.f16(); |
| } |
| if (ty->Is<core::type::F32>()) { |
| return ctx.dst->ty.f32(); |
| } |
| if (ty->Is<core::type::Bool>()) { |
| return ctx.dst->ty.bool_(); |
| } |
| if (auto* m = ty->As<core::type::Matrix>()) { |
| auto el = CreateASTTypeFor(ctx, m->type()); |
| return ctx.dst->ty.mat(el, m->columns(), m->rows()); |
| } |
| if (auto* v = ty->As<core::type::Vector>()) { |
| auto el = CreateASTTypeFor(ctx, v->type()); |
| if (v->Packed()) { |
| TINT_ASSERT(v->Width() == 3u); |
| return ctx.dst->ty(core::BuiltinType::kPackedVec3, el); |
| } else { |
| return ctx.dst->ty.vec(el, v->Width()); |
| } |
| } |
| if (auto* a = ty->As<core::type::Array>()) { |
| auto el = CreateASTTypeFor(ctx, a->ElemType()); |
| tint::Vector<const Attribute*, 1> attrs; |
| if (!a->IsStrideImplicit()) { |
| attrs.Push(ctx.dst->create<StrideAttribute>(a->Stride())); |
| } |
| if (a->Count()->Is<core::type::RuntimeArrayCount>()) { |
| return ctx.dst->ty.array(el, std::move(attrs)); |
| } |
| if (auto* override = a->Count()->As<sem::NamedOverrideArrayCount>()) { |
| auto* count = ctx.Clone(override->variable->Declaration()); |
| return ctx.dst->ty.array(el, count, std::move(attrs)); |
| } |
| if (auto* override = a->Count()->As<sem::UnnamedOverrideArrayCount>()) { |
| // If the array count is an unnamed (complex) override expression, then its not safe to |
| // redeclare this type as we'd end up with two types that would not compare equal. |
| // See crbug.com/tint/1764. |
| // Look for a type alias for this array. |
| for (auto* type_decl : ctx.src->AST().TypeDecls()) { |
| if (auto* alias = type_decl->As<Alias>()) { |
| if (ty == ctx.src->Sem().Get(alias)) { |
| // Alias found. Use the alias name to ensure types compare equal. |
| return ctx.dst->ty(ctx.Clone(alias->name->symbol)); |
| } |
| } |
| } |
| // Array is not aliased. Rebuild the array. |
| auto* count = ctx.Clone(override->expr->Declaration()); |
| return ctx.dst->ty.array(el, count, std::move(attrs)); |
| } |
| auto count = a->ConstantCount(); |
| if (TINT_UNLIKELY(!count)) { |
| TINT_ICE() << core::type::Array::kErrExpectedConstantCount; |
| } |
| return ctx.dst->ty.array(el, u32(count.value()), std::move(attrs)); |
| } |
| if (auto* s = ty->As<core::type::Struct>()) { |
| return ctx.dst->ty(ctx.Clone(s->Name())); |
| } |
| if (auto* s = ty->As<core::type::Reference>()) { |
| return CreateASTTypeFor(ctx, s->StoreType()); |
| } |
| if (auto* a = ty->As<core::type::Atomic>()) { |
| return ctx.dst->ty.atomic(CreateASTTypeFor(ctx, a->Type())); |
| } |
| if (auto* t = ty->As<core::type::DepthTexture>()) { |
| return ctx.dst->ty.depth_texture(t->dim()); |
| } |
| if (auto* t = ty->As<core::type::DepthMultisampledTexture>()) { |
| return ctx.dst->ty.depth_multisampled_texture(t->dim()); |
| } |
| if (ty->Is<core::type::ExternalTexture>()) { |
| return ctx.dst->ty.external_texture(); |
| } |
| if (auto* t = ty->As<core::type::MultisampledTexture>()) { |
| return ctx.dst->ty.multisampled_texture(t->dim(), CreateASTTypeFor(ctx, t->type())); |
| } |
| if (auto* t = ty->As<core::type::SampledTexture>()) { |
| return ctx.dst->ty.sampled_texture(t->dim(), CreateASTTypeFor(ctx, t->type())); |
| } |
| if (auto* t = ty->As<core::type::StorageTexture>()) { |
| return ctx.dst->ty.storage_texture(t->dim(), t->texel_format(), t->access()); |
| } |
| if (auto* s = ty->As<core::type::Sampler>()) { |
| return ctx.dst->ty.sampler(s->kind()); |
| } |
| if (auto* p = ty->As<core::type::Pointer>()) { |
| // Note: core::type::Pointer always has an inferred access, but WGSL only allows an explicit |
| // access in the 'storage' address space. |
| auto address_space = p->AddressSpace(); |
| auto access = |
| address_space == core::AddressSpace::kStorage ? p->Access() : core::Access::kUndefined; |
| return ctx.dst->ty.ptr(address_space, CreateASTTypeFor(ctx, p->StoreType()), access); |
| } |
| TINT_UNREACHABLE() << "Unhandled type: " << ty->TypeInfo().name; |
| } |
| |
| } // namespace tint::ast::transform |
