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authorLioncash <mathew1800@gmail.com>2019-07-16 17:50:36 +0200
committerLioncash <mathew1800@gmail.com>2019-07-19 03:03:30 +0200
commit56bc11d952fa228475d09891e01b3d1c6d32f015 (patch)
treeed5c3cc46372608faacc9bab17d876bd8d400624 /src
parentvideo_core/control_flow: Use the prefix variant of operator++ for iterators (diff)
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Diffstat (limited to 'src')
-rw-r--r--src/video_core/shader/control_flow.cpp25
1 files changed, 15 insertions, 10 deletions
diff --git a/src/video_core/shader/control_flow.cpp b/src/video_core/shader/control_flow.cpp
index c2243337c..4d500320a 100644
--- a/src/video_core/shader/control_flow.cpp
+++ b/src/video_core/shader/control_flow.cpp
@@ -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