shader: walk every resource plan with the x86 SRT walker

src/graphics/shader/recompiler/ir/passes/SrtWalker.h

@@ -8,8 +8,6 @@
 
 namespace Libs::Graphics::ShaderRecompiler::IR {
 
-class Value;
-
 using SrtMemoryReader = bool (*)(void* userdata, uint64_t address, std::span<uint32_t> values);
 
 // Image descriptors at base + first + k * step, k < count, within size bytes that a sampled
@@ -42,7 +40,6 @@ protected:
 struct SrtRuntime {
 	std::span<const uint32_t> user_data;
 	uint64_t                  shader_base                = 0;
-	SrtMemoryReader           read_memory                = nullptr;
 	void*                     userdata                   = nullptr;
 	SrtMemoryReader           read_specialization_memory = nullptr;
 	std::span<const uint32_t> workgroup_counts;
@@ -57,20 +54,12 @@ public:
 	SrtRuntime ObservedRuntime();
 
 private:
-	static bool ReadStrict(void* userdata, uint64_t address, std::span<uint32_t> values);
-	static bool ReadOrdinary(void* userdata, uint64_t address, std::span<uint32_t> values);
+	static bool Read(void* userdata, uint64_t address, std::span<uint32_t> values);
 
 	SrtRuntime                                  m_source;
 	std::vector<std::pair<uint64_t, uint64_t>>& m_ranges;
 };
 
-// Retained reads no longer need the guest instruction PC. A clean read evaluates
-// its address and bounds through the strict reader as well as the final DWORD.
-struct SrtReadFlags {
-	uint32_t index = 0;
-	uint32_t clean = 0;
-};
-
 enum class RuntimeValueType { Any, Integer, ImmutableInteger };
 
 bool ValidateRuntimeValue(const ResourcePlan& program, Value value,
@@ -78,12 +67,20 @@ bool ValidateRuntimeValue(const ResourcePlan& program, Value value,
 // Uniform across a compute wave, including values derived from its workgroup ID.
 // This does not imply that the host can evaluate the value.
 bool ValidateWaveUniformValue(const ResourcePlan& program, Value value);
-void CompileSrtWalker(ResourcePlan& program);
+// Compiles the plan's x86 walker. Without values it walks the plan's resources; otherwise it
+// only evaluates the values, with every block reachable.
+void CompileSrtWalker(ResourcePlan& plan, std::span<const Value> values = {});
+// Runs the walker. flat receives the scalar reads of reachable blocks and reads, when non-null,
+// one DWORD range per guest load. False when a reachable read is unknown.
+bool WalkSrt(const ResourcePlan& plan, const SrtRuntime& runtime, std::vector<uint32_t>& flat,
+             std::vector<std::pair<uint64_t, uint64_t>>* reads);
+// Results of the last walk; false when unknown.
+bool WalkedValue(const ResourcePlan& plan, Value value, uint32_t& result);
+bool WalkedDescriptor(const ResourcePlan& plan, uint32_t source, DescriptorValue& result);
+bool WalkedActive(const ResourcePlan& plan, uint32_t source);
 // Length of the guest load at rip if it belongs to the walker running on this thread, else 0.
 // The exception handler completes such a load as a zero read.
 uint32_t SrtWalkerLoadLength(uint64_t rip);
-// Uses the strict reader for values that affect shader specialization.
-SrtRuntime CleanRuntime(SrtRuntime runtime);
 
 // Nonnegative affine coefficients: element zero is constant, remaining elements are
 // caller-selected leaves. Runtime range proofs must additionally exclude U32 wrap.
@@ -127,43 +124,6 @@ std::optional<std::array<uint64_t, Size>> AffineIndex(
 	return left;
 }
 
-// One memoized evaluation session shared by the entire shader resource refresh.
-class SrtWalker {
-public:
-	SrtWalker(const ResourcePlan& program, const SrtRuntime& runtime,
-	          SrtWalker* clean_evaluator = nullptr);
-	~SrtWalker();
-	SrtWalker(const SrtWalker&)            = delete;
-	SrtWalker& operator=(const SrtWalker&) = delete;
-
-	bool Evaluate(Value value, uint32_t& result);
-	bool EvaluateDescriptor(uint32_t source, DescriptorValue& result);
-	// Refreshes reachable scalar reads and active descriptor sources in one walk.
-	bool RefreshFlatBuffer(std::vector<uint32_t>& flat);
-
-private:
-	SrtWalker(SrtWalker& parent, Value active_mask, bool clean = false,
-	          SrtWalker* clean_evaluator = nullptr);
-	ResourcePlan::EvaluationContext& AcquireContext();
-	void ResetUnknowns();
-	static float Float32(uint64_t bits);
-	bool EvaluateWide(Value value, uint64_t& result);
-	bool Arg(const Inst& inst, size_t index, uint64_t& result);
-	bool EvaluatePhi(const Inst& inst, uint64_t& result);
-	bool EvaluateExtract(const Inst& inst, uint64_t& result);
-	bool EvaluateRawRead(const Inst& inst, uint64_t& result);
-	bool EvaluateInst(const Inst& inst, uint64_t& result);
-
-	const ResourcePlan&              m_program;
-	SrtRuntime                      m_runtime;
-	SrtWalker*                      m_clean_evaluator = nullptr;
-	Value                           m_active_mask;
-	const std::vector<uint8_t>*      m_reachable_blocks = nullptr;
-	const SrtWalker*                m_session;
-	uint8_t                         m_read_policy;
-	ResourcePlan::EvaluationContext& m_context;
-};
-
 } // namespace Libs::Graphics::ShaderRecompiler::IR
 
 #endif /* EMULATOR_INCLUDE_EMULATOR_GRAPHICS_SHADER_RECOMPILER_SRTWALKER_H_ */