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refactor(shader): emit structured phis natively

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This commit is contained in:
nmzik
2026-08-19 05:25:28 +02:00
parent d34e30d892
commit 49145c1902
11 changed files with 667 additions and 172 deletions
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src/graphics/shader/recompiler/backend/spirv/SpirvBuilder.cpp
+22
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@@ -1,5 +1,7 @@
#include "graphics/shader/recompiler/backend/spirv/SpirvBuilder.h"
#include "common/debug.h"
#include <cstring>
namespace Libs::Graphics::ShaderRecompiler::Spirv {
@@ -217,7 +219,27 @@ void Builder::AddFunction(const std::vector<uint32_t>& words) {
AppendInstructionWords(m_functions, words.data(), words.size());
}
DeferredPhi Builder::AddDeferredPhi(uint32_t type, uint32_t result, size_t incoming_count) {
std::vector<uint32_t> words {245u, type, result};
words.resize(words.size() + incoming_count * 2u);
const DeferredPhi phi {m_functions.size(), incoming_count};
AddFunction(words);
m_unpatched_phi_incomings += incoming_count;
return phi;
}
void Builder::PatchDeferredPhi(DeferredPhi phi, size_t incoming, uint32_t value, uint32_t parent) {
EXIT_IF(incoming >= phi.incoming_count || value == 0 || parent == 0);
const auto value_word = phi.word_offset + 3u + incoming * 2u;
const auto parent_word = value_word + 1u;
EXIT_IF(m_functions.at(value_word) != 0 || m_functions.at(parent_word) != 0);
m_functions[value_word] = value;
m_functions[parent_word] = parent;
m_unpatched_phi_incomings--;
}
std::vector<uint32_t> Builder::Build() const {
EXIT_IF(m_unpatched_phi_incomings != 0);
std::vector<uint32_t> module;
module.reserve(5u + m_capabilities.size() + m_extensions.size() + m_ext_inst_imports.size() +