d54d7de40e
This commit regresses VertexA shaders, their transformation pass has to be adapted to the new control flow.
46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
// Copyright 2021 yuzu Emulator Project
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#include <algorithm>
|
|
|
|
#include <boost/container/flat_set.hpp>
|
|
#include <boost/container/small_vector.hpp>
|
|
|
|
#include "shader_recompiler/frontend/ir/basic_block.h"
|
|
#include "shader_recompiler/frontend/ir/post_order.h"
|
|
|
|
namespace Shader::IR {
|
|
|
|
BlockList PostOrder(const AbstractSyntaxNode& root) {
|
|
boost::container::small_vector<Block*, 16> block_stack;
|
|
boost::container::flat_set<Block*> visited;
|
|
BlockList post_order_blocks;
|
|
|
|
if (root.type != AbstractSyntaxNode::Type::Block) {
|
|
throw LogicError("First node in abstract syntax list root is not a block");
|
|
}
|
|
Block* const first_block{root.block};
|
|
visited.insert(first_block);
|
|
block_stack.push_back(first_block);
|
|
|
|
while (!block_stack.empty()) {
|
|
Block* const block{block_stack.back()};
|
|
const auto visit{[&](Block* branch) {
|
|
if (!visited.insert(branch).second) {
|
|
return false;
|
|
}
|
|
// Calling push_back twice is faster than insert on MSVC
|
|
block_stack.push_back(block);
|
|
block_stack.push_back(branch);
|
|
return true;
|
|
}};
|
|
block_stack.pop_back();
|
|
if (std::ranges::none_of(block->ImmSuccessors(), visit)) {
|
|
post_order_blocks.push_back(block);
|
|
}
|
|
}
|
|
return post_order_blocks;
|
|
}
|
|
|
|
} // namespace Shader::IR
|