source/fuzz/transformation_add_constant_boolean.cpp

   1 // Copyright (c) 2019 Google LLC
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 #include "source/fuzz/transformation_add_constant_boolean.h"
  16
  17 #include "source/fuzz/fuzzer_util.h"
  18 #include "source/opt/types.h"
  19
  20 namespace spvtools {
  21 namespace fuzz {
  22
  23 TransformationAddConstantBoolean::TransformationAddConstantBoolean(
  24     protobufs::TransformationAddConstantBoolean message)
  25     : message_(std::move(message)) {}
  26
  27 TransformationAddConstantBoolean::TransformationAddConstantBoolean(
  28     uint32_t fresh_id, bool is_true, bool is_irrelevant) {
  29   message_.set_fresh_id(fresh_id);
  30   message_.set_is_true(is_true);
  31   message_.set_is_irrelevant(is_irrelevant);
  32 }
  33
  34 bool TransformationAddConstantBoolean::IsApplicable(
  35     opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
  36   return fuzzerutil::MaybeGetBoolType(ir_context) != 0 &&
  37          fuzzerutil::IsFreshId(ir_context, message_.fresh_id());
  38 }
  39
  40 void TransformationAddConstantBoolean::Apply(
  41     opt::IRContext* ir_context,
  42     TransformationContext* transformation_context) const {
  43   // Add the boolean constant to the module, ensuring the module's id bound is
  44   // high enough.
  45   auto new_instruction = MakeUnique<opt::Instruction>(
  46       ir_context,
  47       message_.is_true() ? spv::Op::OpConstantTrue : spv::Op::OpConstantFalse,
  48       fuzzerutil::MaybeGetBoolType(ir_context), message_.fresh_id(),
  49       opt::Instruction::OperandList());
  50   auto new_instruction_ptr = new_instruction.get();
  51   ir_context->module()->AddGlobalValue(std::move(new_instruction));
  52   fuzzerutil::UpdateModuleIdBound(ir_context, message_.fresh_id());
  53
  54   // Inform the def-use manager about the new instruction. Invalidate the
  55   // constant manager as we have added a new constant.
  56   ir_context->get_def_use_mgr()->AnalyzeInstDef(new_instruction_ptr);
  57   ir_context->InvalidateAnalyses(opt::IRContext::kAnalysisConstants);
  58
  59   if (message_.is_irrelevant()) {
  60     transformation_context->GetFactManager()->AddFactIdIsIrrelevant(
  61         message_.fresh_id());
  62   }
  63 }
  64
  65 protobufs::Transformation TransformationAddConstantBoolean::ToMessage() const {
  66   protobufs::Transformation result;
  67   *result.mutable_add_constant_boolean() = message_;
  68   return result;
  69 }
  70
  71 std::unordered_set<uint32_t> TransformationAddConstantBoolean::GetFreshIds()
  72     const {
  73   return {message_.fresh_id()};
  74 }
  75
  76 }  // namespace fuzz
  77 }  // namespace spvtools