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// Copyright (c) 2019 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/val/instruction.h"
#include "source/val/validation_state.h"
namespace spvtools {
namespace val {
spv_result_t ValidateSmallTypeUses(ValidationState_t& _,
const Instruction* inst) {
if (!_.HasCapability(SpvCapabilityShader) || inst->type_id() == 0 ||
!_.ContainsLimitedUseIntOrFloatType(inst->type_id())) {
return SPV_SUCCESS;
}
if (_.IsPointerType(inst->type_id())) return SPV_SUCCESS;
// The validator should previously have checked ways to generate 8- or 16-bit
// types. So we only need to considervalid paths from source to sink.
// When restricted, uses of 8- or 16-bit types can only be stores,
// width-only conversions, decorations and copy object.
for (auto use : inst->uses()) {
const auto* user = use.first;
switch (user->opcode()) {
case SpvOpDecorate:
case SpvOpDecorateId:
case SpvOpCopyObject:
case SpvOpStore:
case SpvOpFConvert:
case SpvOpUConvert:
case SpvOpSConvert:
break;
default:
return _.diag(SPV_ERROR_INVALID_ID, user)
<< "Invalid use of 8- or 16-bit result";
}
}
return SPV_SUCCESS;
}
} // namespace val
} // namespace spvtools
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