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video_core/control_flow: Use std::move where applicable 

Results in less work being done where avoidable.
This commit is contained in:
Lioncash 2019-07-16 11:50:36 -04:00
parent e7b39f47f8
commit 56bc11d952
1 changed files with 15 additions and 10 deletions
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25
src/video_core/shader/control_flow.cpp
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@ -371,10 +371,11 @@ bool TryQuery(CFGRebuildState& state) {
if (state.queries.empty()) {
return false;
}
Query& q = state.queries.front();
const u32 block_index = state.registered[q.address];
BlockInfo& block = state.block_info[block_index];
// If the block is visted, check if the stacks match, else gather the ssy/pbk
// If the block is visited, check if the stacks match, else gather the ssy/pbk
// labels into the current stack and look if the branch at the end of the block
// consumes a label. Schedule new queries accordingly
if (block.visited) {
@ -385,7 +386,8 @@ bool TryQuery(CFGRebuildState& state) {
return all_okay;
}
block.visited = true;
state.stacks[q.address] = BlockStack{q};
state.stacks.insert_or_assign(q.address, BlockStack{q});
Query q2(q);
state.queries.pop_front();
gather_labels(q2.ssy_stack, state.ssy_labels, block);
@ -394,6 +396,7 @@ bool TryQuery(CFGRebuildState& state) {
q2.address = block.end + 1;
state.queries.push_back(q2);
}
Query conditional_query{q2};
if (block.branch.is_sync) {
if (block.branch.address == unassigned_branch) {
@ -408,7 +411,7 @@ bool TryQuery(CFGRebuildState& state) {
conditional_query.pbk_stack.pop();
}
conditional_query.address = block.branch.address;
state.queries.push_back(conditional_query);
state.queries.push_back(std::move(conditional_query));
return true;
}
} // Anonymous namespace
@ -416,6 +419,7 @@ bool TryQuery(CFGRebuildState& state) {
std::optional<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code,
std::size_t program_size, u32 start_address) {
CFGRebuildState state{program_code, program_size, start_address};
// Inspect Code and generate blocks
state.labels.clear();
state.labels.emplace(start_address);
@ -425,10 +429,9 @@ std::optional<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code,
return {};
}
}
// Decompile Stacks
Query start_query{};
start_query.address = state.start;
state.queries.push_back(start_query);
state.queries.push_back(Query{state.start, {}, {}});
bool decompiled = true;
while (!state.queries.empty()) {
if (!TryQuery(state)) {
@ -436,14 +439,15 @@ std::optional<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code,
break;
}
}
// Sort and organize results
std::sort(state.block_info.begin(), state.block_info.end(),
[](const BlockInfo& a, const BlockInfo& b) -> bool { return a.start < b.start; });
[](const BlockInfo& a, const BlockInfo& b) { return a.start < b.start; });
ShaderCharacteristics result_out{};
result_out.decompilable = decompiled;
result_out.start = start_address;
result_out.end = start_address;
for (auto& block : state.block_info) {
for (const auto& block : state.block_info) {
ShaderBlock new_block{};
new_block.start = block.start;
new_block.end = block.end;
@ -458,8 +462,9 @@ std::optional<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code,
}
if (result_out.decompilable) {
result_out.labels = std::move(state.labels);
return {result_out};
return {std::move(result_out)};
}
// If it's not decompilable, merge the unlabelled blocks together
auto back = result_out.blocks.begin();
auto next = std::next(back);
@ -472,6 +477,6 @@ std::optional<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code,
back = next;
++next;
}
return {result_out};
return {std::move(result_out)};
}
} // namespace VideoCommon::Shader