| // Copyright 2023 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/core/ir/var.h" |
| |
| #include "src/tint/lang/core/ir/clone_context.h" |
| #include "src/tint/lang/core/ir/module.h" |
| #include "src/tint/lang/core/ir/store.h" |
| #include "src/tint/lang/core/type/pointer.h" |
| #include "src/tint/utils/ice/ice.h" |
| |
| TINT_INSTANTIATE_TYPEINFO(tint::core::ir::Var); |
| |
| namespace tint::core::ir { |
| |
| Var::Var(InstructionResult* result) { |
| if (result && result->Type()) { |
| TINT_ASSERT(result->Type()->Is<core::type::Pointer>()); |
| } |
| |
| // Default to no initializer. |
| AddOperand(Var::kInitializerOperandOffset, nullptr); |
| AddResult(result); |
| } |
| |
| Var::~Var() = default; |
| |
| Var* Var::Clone(CloneContext& ctx) { |
| auto* new_result = ctx.Clone(Result(0)); |
| auto* new_var = ctx.ir.instructions.Create<Var>(new_result); |
| |
| new_var->binding_point_ = binding_point_; |
| new_var->attributes_ = attributes_; |
| |
| auto name = ctx.ir.NameOf(this); |
| if (name.IsValid()) { |
| ctx.ir.SetName(new_var, name.Name()); |
| } |
| return new_var; |
| } |
| |
| void Var::SetInitializer(Value* initializer) { |
| SetOperand(Var::kInitializerOperandOffset, initializer); |
| } |
| |
| void Var::DestroyIfOnlyAssigned() { |
| auto* result = Result(0); |
| 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::core::ir |