mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-26 13:20:05 +00:00
567 lines
21 KiB
C++
567 lines
21 KiB
C++
// Copyright (c) 2018 Google LLC.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <algorithm>
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#include <vector>
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#include "source/spirv_constant.h"
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#include "source/spirv_target_env.h"
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#include "source/val/function.h"
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#include "source/val/instruction.h"
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#include "source/val/validate.h"
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#include "source/val/validation_state.h"
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namespace spvtools {
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namespace val {
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namespace {
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// Limit the number of checked locations to 4096. Multiplied by 4 to represent
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// all the components. This limit is set to be well beyond practical use cases.
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const uint32_t kMaxLocations = 4096 * 4;
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// Returns true if \c inst is an input or output variable.
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bool is_interface_variable(const Instruction* inst, bool is_spv_1_4) {
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if (is_spv_1_4) {
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// Starting in SPIR-V 1.4, all global variables are interface variables.
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return inst->opcode() == spv::Op::OpVariable &&
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inst->GetOperandAs<spv::StorageClass>(2u) !=
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spv::StorageClass::Function;
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} else {
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return inst->opcode() == spv::Op::OpVariable &&
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(inst->GetOperandAs<spv::StorageClass>(2u) ==
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spv::StorageClass::Input ||
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inst->GetOperandAs<spv::StorageClass>(2u) ==
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spv::StorageClass::Output);
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}
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}
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// Checks that \c var is listed as an interface in all the entry points that use
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// it.
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spv_result_t check_interface_variable(ValidationState_t& _,
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const Instruction* var) {
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std::vector<const Function*> functions;
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std::vector<const Instruction*> uses;
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for (auto use : var->uses()) {
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uses.push_back(use.first);
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}
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for (uint32_t i = 0; i < uses.size(); ++i) {
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const auto user = uses[i];
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if (const Function* func = user->function()) {
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functions.push_back(func);
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} else {
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// In the rare case that the variable is used by another instruction in
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// the global scope, continue searching for an instruction used in a
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// function.
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for (auto use : user->uses()) {
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uses.push_back(use.first);
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}
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}
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}
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std::sort(functions.begin(), functions.end(),
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[](const Function* lhs, const Function* rhs) {
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return lhs->id() < rhs->id();
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});
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functions.erase(std::unique(functions.begin(), functions.end()),
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functions.end());
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std::vector<uint32_t> entry_points;
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for (const auto func : functions) {
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for (auto id : _.FunctionEntryPoints(func->id())) {
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entry_points.push_back(id);
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}
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}
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std::sort(entry_points.begin(), entry_points.end());
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entry_points.erase(std::unique(entry_points.begin(), entry_points.end()),
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entry_points.end());
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for (auto id : entry_points) {
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for (const auto& desc : _.entry_point_descriptions(id)) {
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bool found = false;
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for (auto interface : desc.interfaces) {
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if (var->id() == interface) {
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found = true;
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break;
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}
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}
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if (!found) {
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return _.diag(SPV_ERROR_INVALID_ID, var)
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<< "Interface variable id <" << var->id()
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<< "> is used by entry point '" << desc.name << "' id <" << id
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<< ">, but is not listed as an interface";
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}
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}
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}
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return SPV_SUCCESS;
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}
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// This function assumes a base location has been determined already. As such
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// any further location decorations are invalid.
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// TODO: if this code turns out to be slow, there is an opportunity to cache
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// the result for a given type id.
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spv_result_t NumConsumedLocations(ValidationState_t& _, const Instruction* type,
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uint32_t* num_locations) {
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*num_locations = 0;
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switch (type->opcode()) {
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case spv::Op::OpTypeInt:
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case spv::Op::OpTypeFloat:
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// Scalars always consume a single location.
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*num_locations = 1;
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break;
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case spv::Op::OpTypeVector:
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// 3- and 4-component 64-bit vectors consume two locations.
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if ((_.ContainsSizedIntOrFloatType(type->id(), spv::Op::OpTypeInt, 64) ||
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_.ContainsSizedIntOrFloatType(type->id(), spv::Op::OpTypeFloat,
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64)) &&
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(type->GetOperandAs<uint32_t>(2) > 2)) {
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*num_locations = 2;
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} else {
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*num_locations = 1;
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}
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break;
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case spv::Op::OpTypeMatrix:
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// Matrices consume locations equal to the underlying vector type for
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// each column.
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NumConsumedLocations(_, _.FindDef(type->GetOperandAs<uint32_t>(1)),
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num_locations);
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*num_locations *= type->GetOperandAs<uint32_t>(2);
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break;
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case spv::Op::OpTypeArray: {
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// Arrays consume locations equal to the underlying type times the number
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// of elements in the vector.
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NumConsumedLocations(_, _.FindDef(type->GetOperandAs<uint32_t>(1)),
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num_locations);
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bool is_int = false;
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bool is_const = false;
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uint32_t value = 0;
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// Attempt to evaluate the number of array elements.
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std::tie(is_int, is_const, value) =
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_.EvalInt32IfConst(type->GetOperandAs<uint32_t>(2));
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if (is_int && is_const) *num_locations *= value;
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break;
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}
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case spv::Op::OpTypeStruct: {
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// Members cannot have location decorations at this point.
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if (_.HasDecoration(type->id(), spv::Decoration::Location)) {
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return _.diag(SPV_ERROR_INVALID_DATA, type)
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<< _.VkErrorID(4918) << "Members cannot be assigned a location";
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}
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// Structs consume locations equal to the sum of the locations consumed
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// by the members.
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for (uint32_t i = 1; i < type->operands().size(); ++i) {
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uint32_t member_locations = 0;
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if (auto error = NumConsumedLocations(
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_, _.FindDef(type->GetOperandAs<uint32_t>(i)),
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&member_locations)) {
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return error;
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}
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*num_locations += member_locations;
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}
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break;
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}
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default:
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break;
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}
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return SPV_SUCCESS;
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}
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// Returns the number of components consumed by types that support a component
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// decoration.
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uint32_t NumConsumedComponents(ValidationState_t& _, const Instruction* type) {
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uint32_t num_components = 0;
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switch (type->opcode()) {
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case spv::Op::OpTypeInt:
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case spv::Op::OpTypeFloat:
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// 64-bit types consume two components.
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if (type->GetOperandAs<uint32_t>(1) == 64) {
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num_components = 2;
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} else {
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num_components = 1;
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}
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break;
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case spv::Op::OpTypeVector:
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// Vectors consume components equal to the underlying type's consumption
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// times the number of elements in the vector. Note that 3- and 4-element
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// vectors cannot have a component decoration (i.e. assumed to be zero).
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num_components =
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NumConsumedComponents(_, _.FindDef(type->GetOperandAs<uint32_t>(1)));
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num_components *= type->GetOperandAs<uint32_t>(2);
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break;
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case spv::Op::OpTypeArray:
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// Skip the array.
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return NumConsumedComponents(_,
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_.FindDef(type->GetOperandAs<uint32_t>(1)));
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default:
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// This is an error that is validated elsewhere.
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break;
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}
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return num_components;
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}
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// Populates |locations| (and/or |output_index1_locations|) with the use
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// location and component coordinates for |variable|. Indices are calculated as
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// 4 * location + component.
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spv_result_t GetLocationsForVariable(
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ValidationState_t& _, const Instruction* entry_point,
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const Instruction* variable, std::unordered_set<uint32_t>* locations,
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std::unordered_set<uint32_t>* output_index1_locations) {
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const bool is_fragment = entry_point->GetOperandAs<spv::ExecutionModel>(0) ==
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spv::ExecutionModel::Fragment;
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const bool is_output =
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variable->GetOperandAs<spv::StorageClass>(2) == spv::StorageClass::Output;
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auto ptr_type_id = variable->GetOperandAs<uint32_t>(0);
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auto ptr_type = _.FindDef(ptr_type_id);
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auto type_id = ptr_type->GetOperandAs<uint32_t>(2);
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auto type = _.FindDef(type_id);
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// Check for Location, Component and Index decorations on the variable. The
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// validator allows duplicate decorations if the location/component/index are
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// equal. Also track Patch and PerTaskNV decorations.
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bool has_location = false;
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uint32_t location = 0;
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bool has_component = false;
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uint32_t component = 0;
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bool has_index = false;
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uint32_t index = 0;
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bool has_patch = false;
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bool has_per_task_nv = false;
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bool has_per_vertex_khr = false;
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for (auto& dec : _.id_decorations(variable->id())) {
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if (dec.dec_type() == spv::Decoration::Location) {
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if (has_location && dec.params()[0] != location) {
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return _.diag(SPV_ERROR_INVALID_DATA, variable)
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<< "Variable has conflicting location decorations";
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}
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has_location = true;
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location = dec.params()[0];
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} else if (dec.dec_type() == spv::Decoration::Component) {
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if (has_component && dec.params()[0] != component) {
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return _.diag(SPV_ERROR_INVALID_DATA, variable)
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<< "Variable has conflicting component decorations";
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}
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has_component = true;
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component = dec.params()[0];
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} else if (dec.dec_type() == spv::Decoration::Index) {
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if (!is_output || !is_fragment) {
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return _.diag(SPV_ERROR_INVALID_DATA, variable)
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<< "Index can only be applied to Fragment output variables";
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}
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if (has_index && dec.params()[0] != index) {
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return _.diag(SPV_ERROR_INVALID_DATA, variable)
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<< "Variable has conflicting index decorations";
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}
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has_index = true;
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index = dec.params()[0];
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} else if (dec.dec_type() == spv::Decoration::BuiltIn) {
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// Don't check built-ins.
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return SPV_SUCCESS;
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} else if (dec.dec_type() == spv::Decoration::Patch) {
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has_patch = true;
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} else if (dec.dec_type() == spv::Decoration::PerTaskNV) {
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has_per_task_nv = true;
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} else if (dec.dec_type() == spv::Decoration::PerVertexKHR) {
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if (!is_fragment) {
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return _.diag(SPV_ERROR_INVALID_DATA, variable)
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<< _.VkErrorID(6777)
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<< "PerVertexKHR can only be applied to Fragment Execution "
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"Models";
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}
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if (type->opcode() != spv::Op::OpTypeArray &&
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type->opcode() != spv::Op::OpTypeRuntimeArray) {
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return _.diag(SPV_ERROR_INVALID_DATA, variable)
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<< _.VkErrorID(6778)
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<< "PerVertexKHR must be declared as arrays";
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}
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has_per_vertex_khr = true;
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}
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}
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// Vulkan 14.1.3: Tessellation control and mesh per-vertex outputs and
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// tessellation control, evaluation and geometry per-vertex inputs have a
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// layer of arraying that is not included in interface matching.
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bool is_arrayed = false;
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switch (entry_point->GetOperandAs<spv::ExecutionModel>(0)) {
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case spv::ExecutionModel::TessellationControl:
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if (!has_patch) {
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is_arrayed = true;
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}
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break;
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case spv::ExecutionModel::TessellationEvaluation:
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if (!is_output && !has_patch) {
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is_arrayed = true;
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}
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break;
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case spv::ExecutionModel::Geometry:
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if (!is_output) {
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is_arrayed = true;
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}
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break;
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case spv::ExecutionModel::Fragment:
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if (!is_output && has_per_vertex_khr) {
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is_arrayed = true;
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}
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break;
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case spv::ExecutionModel::MeshNV:
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if (is_output && !has_per_task_nv) {
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is_arrayed = true;
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}
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break;
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default:
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break;
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}
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// Unpack arrayness.
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if (is_arrayed && (type->opcode() == spv::Op::OpTypeArray ||
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type->opcode() == spv::Op::OpTypeRuntimeArray)) {
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type_id = type->GetOperandAs<uint32_t>(1);
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type = _.FindDef(type_id);
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}
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if (type->opcode() == spv::Op::OpTypeStruct) {
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// Don't check built-ins.
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if (_.HasDecoration(type_id, spv::Decoration::BuiltIn)) return SPV_SUCCESS;
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}
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// Only block-decorated structs don't need a location on the variable.
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const bool is_block = _.HasDecoration(type_id, spv::Decoration::Block);
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if (!has_location && !is_block) {
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const auto vuid = (type->opcode() == spv::Op::OpTypeStruct) ? 4917 : 4916;
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return _.diag(SPV_ERROR_INVALID_DATA, variable)
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<< _.VkErrorID(vuid) << "Variable must be decorated with a location";
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}
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const std::string storage_class = is_output ? "output" : "input";
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if (has_location) {
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auto sub_type = type;
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bool is_int = false;
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bool is_const = false;
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uint32_t array_size = 1;
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// If the variable is still arrayed, mark the locations/components per
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// index.
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if (type->opcode() == spv::Op::OpTypeArray) {
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// Determine the array size if possible and get the element type.
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std::tie(is_int, is_const, array_size) =
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_.EvalInt32IfConst(type->GetOperandAs<uint32_t>(2));
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if (!is_int || !is_const) array_size = 1;
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auto sub_type_id = type->GetOperandAs<uint32_t>(1);
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sub_type = _.FindDef(sub_type_id);
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}
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for (uint32_t array_idx = 0; array_idx < array_size; ++array_idx) {
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uint32_t num_locations = 0;
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if (auto error = NumConsumedLocations(_, sub_type, &num_locations))
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return error;
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uint32_t num_components = NumConsumedComponents(_, sub_type);
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uint32_t array_location = location + (num_locations * array_idx);
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uint32_t start = array_location * 4;
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if (kMaxLocations <= start) {
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// Too many locations, give up.
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break;
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}
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uint32_t end = (array_location + num_locations) * 4;
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if (num_components != 0) {
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start += component;
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end = array_location * 4 + component + num_components;
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}
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auto locs = locations;
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if (has_index && index == 1) locs = output_index1_locations;
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for (uint32_t i = start; i < end; ++i) {
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if (!locs->insert(i).second) {
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return _.diag(SPV_ERROR_INVALID_DATA, entry_point)
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<< "Entry-point has conflicting " << storage_class
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<< " location assignment at location " << i / 4
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<< ", component " << i % 4;
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}
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}
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}
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} else {
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// For Block-decorated structs with no location assigned to the variable,
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// each member of the block must be assigned a location. Also record any
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// member component assignments. The validator allows duplicate decorations
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// if they agree on the location/component.
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std::unordered_map<uint32_t, uint32_t> member_locations;
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std::unordered_map<uint32_t, uint32_t> member_components;
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for (auto& dec : _.id_decorations(type_id)) {
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if (dec.dec_type() == spv::Decoration::Location) {
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auto where = member_locations.find(dec.struct_member_index());
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if (where == member_locations.end()) {
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member_locations[dec.struct_member_index()] = dec.params()[0];
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} else if (where->second != dec.params()[0]) {
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return _.diag(SPV_ERROR_INVALID_DATA, type)
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<< "Member index " << dec.struct_member_index()
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<< " has conflicting location assignments";
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}
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} else if (dec.dec_type() == spv::Decoration::Component) {
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auto where = member_components.find(dec.struct_member_index());
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if (where == member_components.end()) {
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member_components[dec.struct_member_index()] = dec.params()[0];
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} else if (where->second != dec.params()[0]) {
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return _.diag(SPV_ERROR_INVALID_DATA, type)
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<< "Member index " << dec.struct_member_index()
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<< " has conflicting component assignments";
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}
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}
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}
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for (uint32_t i = 1; i < type->operands().size(); ++i) {
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auto where = member_locations.find(i - 1);
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if (where == member_locations.end()) {
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return _.diag(SPV_ERROR_INVALID_DATA, type)
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<< _.VkErrorID(4919) << "Member index " << i - 1
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<< " is missing a location assignment";
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}
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location = where->second;
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auto member = _.FindDef(type->GetOperandAs<uint32_t>(i));
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uint32_t num_locations = 0;
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if (auto error = NumConsumedLocations(_, member, &num_locations))
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return error;
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// If the component is not specified, it is assumed to be zero.
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uint32_t num_components = NumConsumedComponents(_, member);
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component = 0;
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if (member_components.count(i - 1)) {
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component = member_components[i - 1];
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}
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uint32_t start = location * 4;
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if (kMaxLocations <= start) {
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// Too many locations, give up.
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continue;
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}
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if (member->opcode() == spv::Op::OpTypeArray && num_components >= 1 &&
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num_components < 4) {
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// When an array has an element that takes less than a location in
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// size, calculate the used locations in a strided manner.
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for (uint32_t l = location; l < num_locations + location; ++l) {
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for (uint32_t c = component; c < component + num_components; ++c) {
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uint32_t check = 4 * l + c;
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if (!locations->insert(check).second) {
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return _.diag(SPV_ERROR_INVALID_DATA, entry_point)
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<< "Entry-point has conflicting " << storage_class
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<< " location assignment at location " << l
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<< ", component " << c;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// TODO: There is a hole here is the member is an array of 3- or
|
|
// 4-element vectors of 64-bit types.
|
|
uint32_t end = (location + num_locations) * 4;
|
|
if (num_components != 0) {
|
|
start += component;
|
|
end = location * 4 + component + num_components;
|
|
}
|
|
for (uint32_t l = start; l < end; ++l) {
|
|
if (!locations->insert(l).second) {
|
|
return _.diag(SPV_ERROR_INVALID_DATA, entry_point)
|
|
<< "Entry-point has conflicting " << storage_class
|
|
<< " location assignment at location " << l / 4
|
|
<< ", component " << l % 4;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return SPV_SUCCESS;
|
|
}
|
|
|
|
spv_result_t ValidateLocations(ValidationState_t& _,
|
|
const Instruction* entry_point) {
|
|
// According to Vulkan 14.1 only the following execution models have
|
|
// locations assigned.
|
|
// TODO(dneto): SPV_NV_ray_tracing also uses locations on interface variables,
|
|
// in other shader stages. Similarly, the *provisional* version of
|
|
// SPV_KHR_ray_tracing did as well, but not the final version.
|
|
switch (entry_point->GetOperandAs<spv::ExecutionModel>(0)) {
|
|
case spv::ExecutionModel::Vertex:
|
|
case spv::ExecutionModel::TessellationControl:
|
|
case spv::ExecutionModel::TessellationEvaluation:
|
|
case spv::ExecutionModel::Geometry:
|
|
case spv::ExecutionModel::Fragment:
|
|
break;
|
|
default:
|
|
return SPV_SUCCESS;
|
|
}
|
|
|
|
// Locations are stored as a combined location and component values.
|
|
std::unordered_set<uint32_t> input_locations;
|
|
std::unordered_set<uint32_t> output_locations_index0;
|
|
std::unordered_set<uint32_t> output_locations_index1;
|
|
std::unordered_set<uint32_t> seen;
|
|
for (uint32_t i = 3; i < entry_point->operands().size(); ++i) {
|
|
auto interface_id = entry_point->GetOperandAs<uint32_t>(i);
|
|
auto interface_var = _.FindDef(interface_id);
|
|
auto storage_class = interface_var->GetOperandAs<spv::StorageClass>(2);
|
|
if (storage_class != spv::StorageClass::Input &&
|
|
storage_class != spv::StorageClass::Output) {
|
|
continue;
|
|
}
|
|
if (!seen.insert(interface_id).second) {
|
|
// Pre-1.4 an interface variable could be listed multiple times in an
|
|
// entry point. Validation for 1.4 or later is done elsewhere.
|
|
continue;
|
|
}
|
|
|
|
auto locations = (storage_class == spv::StorageClass::Input)
|
|
? &input_locations
|
|
: &output_locations_index0;
|
|
if (auto error = GetLocationsForVariable(
|
|
_, entry_point, interface_var, locations, &output_locations_index1))
|
|
return error;
|
|
}
|
|
|
|
return SPV_SUCCESS;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
spv_result_t ValidateInterfaces(ValidationState_t& _) {
|
|
bool is_spv_1_4 = _.version() >= SPV_SPIRV_VERSION_WORD(1, 4);
|
|
for (auto& inst : _.ordered_instructions()) {
|
|
if (is_interface_variable(&inst, is_spv_1_4)) {
|
|
if (auto error = check_interface_variable(_, &inst)) {
|
|
return error;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (spvIsVulkanEnv(_.context()->target_env)) {
|
|
for (auto& inst : _.ordered_instructions()) {
|
|
if (inst.opcode() == spv::Op::OpEntryPoint) {
|
|
if (auto error = ValidateLocations(_, &inst)) {
|
|
return error;
|
|
}
|
|
}
|
|
if (inst.opcode() == spv::Op::OpTypeVoid) break;
|
|
}
|
|
}
|
|
|
|
return SPV_SUCCESS;
|
|
}
|
|
|
|
} // namespace val
|
|
} // namespace spvtools
|