mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-10-18 19:20:05 +00:00
fcb22ecf0f
Adds a virtual method, GetFreshIds(), to Transformation. Every transformation uses this to indicate which ids in its protobuf message are fresh ids. This means that when replaying a sequence of transformations the replayer can obtain a smallest id that is not in use by the module already and that will not be used by any transformation by necessity. Ids greater than or equal to this id can be used as overflow ids. Fixes #3851.
106 lines
3.9 KiB
C++
106 lines
3.9 KiB
C++
// 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/fuzz/transformation_set_function_control.h"
|
|
|
|
namespace spvtools {
|
|
namespace fuzz {
|
|
|
|
TransformationSetFunctionControl::TransformationSetFunctionControl(
|
|
const spvtools::fuzz::protobufs::TransformationSetFunctionControl& message)
|
|
: message_(message) {}
|
|
|
|
TransformationSetFunctionControl::TransformationSetFunctionControl(
|
|
uint32_t function_id, uint32_t function_control) {
|
|
message_.set_function_id(function_id);
|
|
message_.set_function_control(function_control);
|
|
}
|
|
|
|
bool TransformationSetFunctionControl::IsApplicable(
|
|
opt::IRContext* ir_context, const TransformationContext& /*unused*/) const {
|
|
opt::Instruction* function_def_instruction =
|
|
FindFunctionDefInstruction(ir_context);
|
|
if (!function_def_instruction) {
|
|
// The given function id does not correspond to any function.
|
|
return false;
|
|
}
|
|
uint32_t existing_function_control_mask =
|
|
function_def_instruction->GetSingleWordInOperand(0);
|
|
|
|
// Check (via an assertion) that function control mask doesn't have any bad
|
|
// bits set.
|
|
uint32_t acceptable_function_control_bits =
|
|
SpvFunctionControlInlineMask | SpvFunctionControlDontInlineMask |
|
|
SpvFunctionControlPureMask | SpvFunctionControlConstMask;
|
|
// The following is to keep release-mode compilers happy as this variable is
|
|
// only used in an assertion.
|
|
(void)(acceptable_function_control_bits);
|
|
assert(!(message_.function_control() & ~acceptable_function_control_bits) &&
|
|
"Nonsensical loop control bits were found.");
|
|
|
|
// Check (via an assertion) that function control mask does not have both
|
|
// Inline and DontInline bits set.
|
|
assert(!((message_.function_control() & SpvFunctionControlInlineMask) &&
|
|
(message_.function_control() & SpvFunctionControlDontInlineMask)) &&
|
|
"It is not OK to set both the 'Inline' and 'DontInline' bits of a "
|
|
"function control mask");
|
|
|
|
// Check that Const and Pure are only present if they were present on the
|
|
// original function
|
|
for (auto mask_bit :
|
|
{SpvFunctionControlPureMask, SpvFunctionControlConstMask}) {
|
|
if ((message_.function_control() & mask_bit) &&
|
|
!(existing_function_control_mask & mask_bit)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void TransformationSetFunctionControl::Apply(
|
|
opt::IRContext* ir_context, TransformationContext* /*unused*/) const {
|
|
opt::Instruction* function_def_instruction =
|
|
FindFunctionDefInstruction(ir_context);
|
|
function_def_instruction->SetInOperand(0, {message_.function_control()});
|
|
}
|
|
|
|
protobufs::Transformation TransformationSetFunctionControl::ToMessage() const {
|
|
protobufs::Transformation result;
|
|
*result.mutable_set_function_control() = message_;
|
|
return result;
|
|
}
|
|
|
|
opt::Instruction* TransformationSetFunctionControl ::FindFunctionDefInstruction(
|
|
opt::IRContext* ir_context) const {
|
|
// Look through all functions for a function whose defining instruction's
|
|
// result id matches |message_.function_id|, returning the defining
|
|
// instruction if found.
|
|
for (auto& function : *ir_context->module()) {
|
|
if (function.DefInst().result_id() == message_.function_id()) {
|
|
return &function.DefInst();
|
|
}
|
|
}
|
|
// A nullptr result indicates that no match was found.
|
|
return nullptr;
|
|
}
|
|
|
|
std::unordered_set<uint32_t> TransformationSetFunctionControl::GetFreshIds()
|
|
const {
|
|
return std::unordered_set<uint32_t>();
|
|
}
|
|
|
|
} // namespace fuzz
|
|
} // namespace spvtools
|