// Copyright (c) 2018 Google LLC.
//
// 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 "source/val/validate.h"
#include "source/opcode.h"
#include "source/spirv_target_env.h"
#include "source/val/instruction.h"
#include "source/val/validation_state.h"
namespace spvtools {
namespace val {
namespace {
spv_result_t ValidateDecorate(ValidationState_t& _, const Instruction* inst) {
const auto decoration = inst->GetOperandAs<uint32_t>(1);
if (decoration == SpvDecorationSpecId) {
const auto target_id = inst->GetOperandAs<uint32_t>(0);
const auto target = _.FindDef(target_id);
if (!target || !spvOpcodeIsScalarSpecConstant(target->opcode())) {
return _.diag(SPV_ERROR_INVALID_ID, inst)
<< "OpDecorate SpecId decoration target <id> '"
<< _.getIdName(decoration)
<< "' is not a scalar specialization constant.";
}
}
// TODO: Add validations for all decorations.
return SPV_SUCCESS;
}
spv_result_t ValidateMemberDecorate(ValidationState_t& _,
const Instruction* inst) {
const auto struct_type_id = inst->GetOperandAs<uint32_t>(0);
const auto struct_type = _.FindDef(struct_type_id);
if (!struct_type || SpvOpTypeStruct != struct_type->opcode()) {
return _.diag(SPV_ERROR_INVALID_ID, inst)
<< "OpMemberDecorate Structure type <id> '"
<< _.getIdName(struct_type_id) << "' is not a struct type.";
}
const auto member = inst->GetOperandAs<uint32_t>(1);
const auto member_count =
static_cast<uint32_t>(struct_type->words().size() - 2);
if (member_count <= member) {
return _.diag(SPV_ERROR_INVALID_ID, inst)
<< "Index " << member
<< " provided in OpMemberDecorate for struct <id> "
<< _.getIdName(struct_type_id)
<< " is out of bounds. The structure has " << member_count
<< " members. Largest valid index is " << member_count - 1 << ".";
}
return SPV_SUCCESS;
}
spv_result_t ValidateDecorationGroup(ValidationState_t& _,
const Instruction* inst) {
if (spvIsWebGPUEnv(_.context()->target_env)) {
return _.diag(SPV_ERROR_INVALID_BINARY, inst)
<< "OpDecorationGroup is not allowed in the WebGPU execution "
<< "environment.";
}
const auto decoration_group_id = inst->GetOperandAs<uint32_t>(0);
const auto decoration_group = _.FindDef(decoration_group_id);
for (auto pair : decoration_group->uses()) {
auto use = pair.first;
if (use->opcode() != SpvOpDecorate && use->opcode() != SpvOpGroupDecorate &&
use->opcode() != SpvOpGroupMemberDecorate &&
use->opcode() != SpvOpName) {
return _.diag(SPV_ERROR_INVALID_ID, inst)
<< "Result id of OpDecorationGroup can only "
<< "be targeted by OpName, OpGroupDecorate, "
<< "OpDecorate, and OpGroupMemberDecorate";
}
}
return SPV_SUCCESS;
}
spv_result_t ValidateGroupDecorate(ValidationState_t& _,
const Instruction* inst) {
if (spvIsWebGPUEnv(_.context()->target_env)) {
return _.diag(SPV_ERROR_INVALID_BINARY, inst)
<< "OpGroupDecorate is not allowed in the WebGPU execution "
<< "environment.";
}
const auto decoration_group_id = inst->GetOperandAs<uint32_t>(0);
auto decoration_group = _.FindDef(decoration_group_id);
if (!decoration_group || SpvOpDecorationGroup != decoration_group->opcode()) {
return _.diag(SPV_ERROR_INVALID_ID, inst)
<< "OpGroupDecorate Decoration group <id> '"
<< _.getIdName(decoration_group_id)
<< "' is not a decoration group.";
}
for (unsigned i = 1; i < inst->operands().size(); ++i) {
auto target_id = inst->GetOperandAs<uint32_t>(i);
auto target = _.FindDef(target_id);
if (!target || target->opcode() == SpvOpDecorationGroup) {
return _.diag(SPV_ERROR_INVALID_ID, inst)
<< "OpGroupDecorate may not target OpDecorationGroup <id> '"
<< _.getIdName(target_id) << "'";
}
}
return SPV_SUCCESS;
}
spv_result_t ValidateGroupMemberDecorate(ValidationState_t& _,
const Instruction* inst) {
if (spvIsWebGPUEnv(_.context()->target_env)) {
return _.diag(SPV_ERROR_INVALID_BINARY, inst)
<< "OpGroupMemberDecorate is not allowed in the WebGPU execution "
<< "environment.";
}
const auto decoration_group_id = inst->GetOperandAs<uint32_t>(0);
const auto decoration_group = _.FindDef(decoration_group_id);
if (!decoration_group || SpvOpDecorationGroup != decoration_group->opcode()) {
return _.diag(SPV_ERROR_INVALID_ID, inst)
<< "OpGroupMemberDecorate Decoration group <id> '"
<< _.getIdName(decoration_group_id)
<< "' is not a decoration group.";
}
// Grammar checks ensures that the number of arguments to this instruction
// is an odd number: 1 decoration group + (id,literal) pairs.
for (size_t i = 1; i + 1 < inst->operands().size(); i += 2) {
const uint32_t struct_id = inst->GetOperandAs<uint32_t>(i);
const uint32_t index = inst->GetOperandAs<uint32_t>(i + 1);
auto struct_instr = _.FindDef(struct_id);
if (!struct_instr || SpvOpTypeStruct != struct_instr->opcode()) {
return _.diag(SPV_ERROR_INVALID_ID, inst)
<< "OpGroupMemberDecorate Structure type <id> '"
<< _.getIdName(struct_id) << "' is not a struct type.";
}
const uint32_t num_struct_members =
static_cast<uint32_t>(struct_instr->words().size() - 2);
if (index >= num_struct_members) {
return _.diag(SPV_ERROR_INVALID_ID, inst)
<< "Index " << index
<< " provided in OpGroupMemberDecorate for struct <id> "
<< _.getIdName(struct_id)
<< " is out of bounds. The structure has " << num_struct_members
<< " members. Largest valid index is " << num_struct_members - 1
<< ".";
}
}
return SPV_SUCCESS;
}
// Registers necessary decoration(s) for the appropriate IDs based on the
// instruction.
spv_result_t RegisterDecorations(ValidationState_t& _,
const Instruction* inst) {
switch (inst->opcode()) {
case SpvOpDecorate: {
const uint32_t target_id = inst->word(1);
const SpvDecoration dec_type = static_cast<SpvDecoration>(inst->word(2));
std::vector<uint32_t> dec_params;
if (inst->words().size() > 3) {
dec_params.insert(dec_params.end(), inst->words().begin() + 3,
inst->words().end());
}
_.RegisterDecorationForId(target_id, Decoration(dec_type, dec_params));
break;
}
case SpvOpMemberDecorate: {
const uint32_t struct_id = inst->word(1);
const uint32_t index = inst->word(2);
const SpvDecoration dec_type = static_cast<SpvDecoration>(inst->word(3));
std::vector<uint32_t> dec_params;
if (inst->words().size() > 4) {
dec_params.insert(dec_params.end(), inst->words().begin() + 4,
inst->words().end());
}
_.RegisterDecorationForId(struct_id,
Decoration(dec_type, dec_params, index));
break;
}
case SpvOpDecorationGroup: {
// We don't need to do anything right now. Assigning decorations to groups
// will be taken care of via OpGroupDecorate.
break;
}
case SpvOpGroupDecorate: {
// Word 1 is the group <id>. All subsequent words are target <id>s that
// are going to be decorated with the decorations.
const uint32_t decoration_group_id = inst->word(1);
std::vector<Decoration>& group_decorations =
_.id_decorations(decoration_group_id);
for (size_t i = 2; i < inst->words().size(); ++i) {
const uint32_t target_id = inst->word(i);
_.RegisterDecorationsForId(target_id, group_decorations.begin(),
group_decorations.end());
}
break;
}
case SpvOpGroupMemberDecorate: {
// Word 1 is the Decoration Group <id> followed by (struct<id>,literal)
// pairs. All decorations of the group should be applied to all the struct
// members that are specified in the instructions.
const uint32_t decoration_group_id = inst->word(1);
std::vector<Decoration>& group_decorations =
_.id_decorations(decoration_group_id);
// Grammar checks ensures that the number of arguments to this instruction
// is an odd number: 1 decoration group + (id,literal) pairs.
for (size_t i = 2; i + 1 < inst->words().size(); i = i + 2) {
const uint32_t struct_id = inst->word(i);
const uint32_t index = inst->word(i + 1);
// ID validation phase ensures this is in fact a struct instruction and
// that the index is not out of bound.
_.RegisterDecorationsForStructMember(struct_id, index,
group_decorations.begin(),
group_decorations.end());
}
break;
}
default:
break;
}
return SPV_SUCCESS;
}
} // namespace
spv_result_t AnnotationPass(ValidationState_t& _, const Instruction* inst) {
switch (inst->opcode()) {
case SpvOpDecorate:
if (auto error = ValidateDecorate(_, inst)) return error;
break;
case SpvOpMemberDecorate:
if (auto error = ValidateMemberDecorate(_, inst)) return error;
break;
case SpvOpDecorationGroup:
if (auto error = ValidateDecorationGroup(_, inst)) return error;
break;
case SpvOpGroupDecorate:
if (auto error = ValidateGroupDecorate(_, inst)) return error;
break;
case SpvOpGroupMemberDecorate:
if (auto error = ValidateGroupMemberDecorate(_, inst)) return error;
break;
default:
break;
}
// In order to validate decoration rules, we need to know all the decorations
// that are applied to any given <id>.
RegisterDecorations(_, inst);
return SPV_SUCCESS;
}
} // namespace val
} // namespace spvtools