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// Copyright (c) 2017 The Khronos Group Inc.
// Copyright (c) 2017 Valve Corporation
// Copyright (c) 2017 LunarG Inc.
//
// 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 "inline_exhaustive_pass.h"
namespace spvtools {
namespace opt {
bool InlineExhaustivePass::InlineExhaustive(ir::Function* func) {
bool modified = false;
// Using block iterators here because of block erasures and insertions.
for (auto bi = func->begin(); bi != func->end(); ++bi) {
for (auto ii = bi->begin(); ii != bi->end();) {
if (IsInlinableFunctionCall(&*ii)) {
// Inline call.
std::vector<std::unique_ptr<ir::BasicBlock>> newBlocks;
std::vector<std::unique_ptr<ir::Instruction>> newVars;
GenInlineCode(&newBlocks, &newVars, ii, bi);
// If call block is replaced with more than one block, point
// succeeding phis at new last block.
if (newBlocks.size() > 1)
UpdateSucceedingPhis(newBlocks);
// Replace old calling block with new block(s).
bi = bi.Erase();
bi = bi.InsertBefore(&newBlocks);
// Insert new function variables.
if (newVars.size() > 0) func->begin()->begin().InsertBefore(std::move(newVars));
// Restart inlining at beginning of calling block.
ii = bi->begin();
modified = true;
} else {
++ii;
}
}
}
return modified;
}
void InlineExhaustivePass::Initialize(ir::IRContext* c) {
InitializeInline(c);
};
Pass::Status InlineExhaustivePass::ProcessImpl() {
// Attempt exhaustive inlining on each entry point function in module
ProcessFunction pfn = [this](ir::Function* fp) {
return InlineExhaustive(fp);
};
bool modified = ProcessEntryPointCallTree(pfn, get_module());
return modified ? Status::SuccessWithChange : Status::SuccessWithoutChange;
}
InlineExhaustivePass::InlineExhaustivePass() {}
Pass::Status InlineExhaustivePass::Process(ir::IRContext* c) {
Initialize(c);
return ProcessImpl();
}
} // namespace opt
} // namespace spvtools
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