| // Copyright 2023 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/tint/lang/core/ir/var.h" |
| #include "src/tint/lang/core/ir/store.h" |
| #include "src/tint/utils/debug/debug.h" |
| |
| TINT_INSTANTIATE_TYPEINFO(tint::ir::Var); |
| |
| namespace tint::ir { |
| |
| Var::Var(InstructionResult* result) { |
| if (result && result->Type()) { |
| TINT_ASSERT(IR, result->Type()->Is<type::Pointer>()); |
| } |
| |
| // Default to no initializer. |
| AddOperand(Var::kInitializerOperandOffset, nullptr); |
| AddResult(result); |
| } |
| |
| Var::~Var() = default; |
| |
| void Var::SetInitializer(Value* initializer) { |
| SetOperand(Var::kInitializerOperandOffset, initializer); |
| } |
| |
| void Var::DestroyIfOnlyAssigned() { |
| auto* result = Result(); |
| if (result->Usages().All([](const Usage& u) { return u.instruction->Is<ir::Store>(); })) { |
| while (!result->Usages().IsEmpty()) { |
| auto& usage = *result->Usages().begin(); |
| usage.instruction->Destroy(); |
| } |
| Destroy(); |
| } |
| } |
| |
| } // namespace tint::ir |