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https://github.com/KhronosGroup/SPIRV-Tools
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8d4261bc44
Some transformations (e.g. TransformationAddFunction) rely on running the validator to decide whether the transformation is applicable. A recent change allowed spirv-fuzz to take validator options, to cater for the case where a module should be considered valid under particular conditions. However, validation during the checking of transformations had no access to these validator options. This change introduced TransformationContext, which currently consists of a fact manager and a set of validator options, but could in the future have other fields corresponding to other objects that it is useful to have access to when applying transformations. Now, instead of checking and applying transformations in the context of a FactManager, a TransformationContext is used. This gives access to the fact manager as before, and also access to the validator options when they are needed.
101 lines
3.8 KiB
C++
101 lines
3.8 KiB
C++
// Copyright (c) 2019 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 "source/fuzz/transformation_set_function_control.h"
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namespace spvtools {
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namespace fuzz {
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TransformationSetFunctionControl::TransformationSetFunctionControl(
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const spvtools::fuzz::protobufs::TransformationSetFunctionControl& message)
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: message_(message) {}
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TransformationSetFunctionControl::TransformationSetFunctionControl(
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uint32_t function_id, uint32_t function_control) {
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message_.set_function_id(function_id);
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message_.set_function_control(function_control);
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}
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bool TransformationSetFunctionControl::IsApplicable(
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opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
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opt::Instruction* function_def_instruction =
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FindFunctionDefInstruction(ir_context);
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if (!function_def_instruction) {
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// The given function id does not correspond to any function.
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return false;
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}
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uint32_t existing_function_control_mask =
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function_def_instruction->GetSingleWordInOperand(0);
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// Check (via an assertion) that function control mask doesn't have any bad
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// bits set.
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uint32_t acceptable_function_control_bits =
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SpvFunctionControlInlineMask | SpvFunctionControlDontInlineMask |
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SpvFunctionControlPureMask | SpvFunctionControlConstMask;
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// The following is to keep release-mode compilers happy as this variable is
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// only used in an assertion.
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(void)(acceptable_function_control_bits);
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assert(!(message_.function_control() & ~acceptable_function_control_bits) &&
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"Nonsensical loop control bits were found.");
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// Check (via an assertion) that function control mask does not have both
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// Inline and DontInline bits set.
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assert(!((message_.function_control() & SpvFunctionControlInlineMask) &&
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(message_.function_control() & SpvFunctionControlDontInlineMask)) &&
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"It is not OK to set both the 'Inline' and 'DontInline' bits of a "
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"function control mask");
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// Check that Const and Pure are only present if they were present on the
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// original function
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for (auto mask_bit :
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{SpvFunctionControlPureMask, SpvFunctionControlConstMask}) {
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if ((message_.function_control() & mask_bit) &&
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!(existing_function_control_mask & mask_bit)) {
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return false;
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}
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}
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return true;
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}
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void TransformationSetFunctionControl::Apply(
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opt::IRContext* ir_context, TransformationContext* /*unused*/) const {
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opt::Instruction* function_def_instruction =
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FindFunctionDefInstruction(ir_context);
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function_def_instruction->SetInOperand(0, {message_.function_control()});
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}
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protobufs::Transformation TransformationSetFunctionControl::ToMessage() const {
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protobufs::Transformation result;
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*result.mutable_set_function_control() = message_;
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return result;
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}
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opt::Instruction* TransformationSetFunctionControl ::FindFunctionDefInstruction(
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opt::IRContext* ir_context) const {
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// Look through all functions for a function whose defining instruction's
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// result id matches |message_.function_id|, returning the defining
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// instruction if found.
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for (auto& function : *ir_context->module()) {
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if (function.DefInst().result_id() == message_.function_id()) {
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return &function.DefInst();
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}
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}
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// A nullptr result indicates that no match was found.
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return nullptr;
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}
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} // namespace fuzz
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} // namespace spvtools
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