mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2025-01-10 08:30:09 +00:00
c8c86a0d36
Includes code to deal correctly with OpFunctionParameter. This is needed by opaque propagation which may not exhaustively inline entry point functions. Adds ProcessEntryPointCallTree: a method to do work on the functions in the entry point call trees in a deterministic order.
66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
// Copyright (c) 2017 The Khronos Group Inc.
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// Copyright (c) 2017 Valve Corporation
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// Copyright (c) 2017 LunarG Inc.
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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 "pass.h"
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#include "iterator.h"
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namespace spvtools {
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namespace opt {
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namespace {
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const uint32_t kEntryPointFunctionIdInIdx = 1;
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} // namespace anonymous
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void Pass::AddCalls(ir::Function* func,
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std::queue<uint32_t>* todo) {
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for (auto bi = func->begin(); bi != func->end(); ++bi)
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for (auto ii = bi->begin(); ii != bi->end(); ++ii)
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if (ii->opcode() == SpvOpFunctionCall)
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todo->push(ii->GetSingleWordInOperand(0));
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}
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bool Pass::ProcessEntryPointCallTree(
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ProcessFunction& pfn, ir::Module* module) {
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// Map from function's result id to function
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std::unordered_map<uint32_t, ir::Function*> id2function;
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for (auto& fn : *module)
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id2function[fn.result_id()] = &fn;
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// Process call tree
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bool modified = false;
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std::queue<uint32_t> todo;
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std::unordered_set<uint32_t> done;
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for (auto& e : module->entry_points())
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todo.push(e.GetSingleWordInOperand(kEntryPointFunctionIdInIdx));
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while (!todo.empty()) {
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const uint32_t fi = todo.front();
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if (done.find(fi) == done.end()) {
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ir::Function* fn = id2function[fi];
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modified = pfn(fn) || modified;
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done.insert(fi);
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AddCalls(fn, &todo);
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}
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todo.pop();
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}
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return modified;
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}
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} // namespace opt
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} // namespace spvtools
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