shader: separate exact descriptor row bounds from pointer offsets

src/graphics/shader/recompiler/ir/ShaderIR.h

@@ -525,12 +525,6 @@ struct ShaderInfo {
 
 struct DescriptorSource {
 	struct IndirectDescriptor {
-		struct PointerTable {
-			uint32_t maximum = 0;
-			uint32_t offset = 0;
-
-			bool operator==(const PointerTable&) const = default;
-		};
 		struct SelectorRead {
 			struct CountedRows {
 				uint32_t source = UINT32_MAX;
@@ -553,7 +547,8 @@ struct DescriptorSource {
 			bool operator==(const SelectorRead& other) const = default;
 		};
 		std::optional<SelectorRead> selector;
-		std::optional<PointerTable> pointer_table;
+		std::optional<uint32_t> table_maximum;
+		std::optional<uint32_t> pointer_offset;
 		uint32_t table_source    = 0;
 		uint32_t table_offset    = 0;
 		uint32_t table_immediate = 0;

src/graphics/shader/recompiler/ir/passes/ResourceMaterialization.cpp

@@ -367,13 +367,12 @@ bool MaterializeIndirectDescriptor(const ResourcePlan&                         p
 			      (table.Stride() & 3u) != 0u || table.Stride() < indirect.table_record_bytes)))
 				return false;
 			const bool affine = indirect.table_stride != 0u;
-			const auto* pointer = indirect.pointer_table ? &*indirect.pointer_table : nullptr;
-			const uint64_t step = pointer != nullptr ? indirect.table_stride
+			const uint64_t step = indirect.table_maximum ? indirect.table_stride
 			    : affine ? uint64_t {1} << std::countr_zero(indirect.table_stride) : 4u;
-			const uint64_t first = ((pointer != nullptr ? indirect.table_offset
+			const uint64_t first = ((indirect.table_maximum ? indirect.table_offset
 			    : indirect.table_offset % step) & ~uint64_t {3}) +
 			                       (indirect.table_immediate & ~3u);
-			const uint64_t domain = pointer != nullptr ? uint64_t {pointer->maximum} + 1u
+			const uint64_t domain = indirect.table_maximum ? uint64_t {*indirect.table_maximum} + 1u
 			                                           : (uint64_t {1} << 32u) / step;
 			const auto count = table_size >= first + 4u
 			    ? std::min((table_size - first - 4u) / step + 1u, domain)
@@ -390,11 +389,11 @@ bool MaterializeIndirectDescriptor(const ResourcePlan&                         p
 			snapshot.flattened_srt.resize(mapping_offset + 2u, 0u);
 			for (uint32_t word = 0; word < count; ++word) {
 				DescriptorValue candidate {.dword_count = dword_count};
-				if (pointer != nullptr) {
+				if (indirect.pointer_offset) {
 					std::array<uint32_t, 2> address {};
 					if (!ReadScalarTable(table_base, table_size, first + word * step, runtime, address) ||
 					    !ReadScalarTable((uint64_t {address[1]} << 32u) | address[0], UINT64_MAX,
-					                     pointer->offset, runtime,
+					                     *indirect.pointer_offset, runtime,
 					                     std::span(candidate.dwords).first(dword_count))) return false;
 				} else if (affine) {
 					if (!ReadScalarTable(table_base, table_size, first + word * step, runtime,

src/graphics/shader/recompiler/ir/passes/ResourceTracking.cpp

@@ -400,7 +400,7 @@ public:
 		std::vector<std::pair<const IndirectDescriptorPlan*, Value>> buffer_selections;
 		for (const auto& plan: m_indirect_descriptors) {
 			auto key = plan.key;
-			if (m_sources[plan.source].indirect_descriptor->pointer_table) {
+			if (m_sources[plan.source].indirect_descriptor->table_maximum) {
 				auto* block = plan.handle->Parent();
 				const auto where = std::ranges::find_if(block->Instructions(),
 				    [&](const Inst& inst) { return &inst == plan.handle; });
@@ -974,7 +974,8 @@ private:
 			if (current.indirect_descriptor.has_value()) {
 				const auto& a = *current.indirect_descriptor;
 				const auto& b = *descriptor.indirect_descriptor;
-				if (a.selector != b.selector || a.pointer_table != b.pointer_table ||
+				if (a.selector != b.selector || a.table_maximum != b.table_maximum ||
+				    a.pointer_offset != b.pointer_offset ||
 				    a.table_source != b.table_source ||
 				    a.table_offset != b.table_offset || a.table_immediate != b.table_immediate ||
 				    a.table_stride != b.table_stride || a.indexed != b.indexed ||
@@ -2779,7 +2780,8 @@ private:
 		indirect.table_source = InternSource(table_source);
 		indirect.table_immediate = low_memory->offset & ~3u;
 		indirect.table_scalar = true;
-		indirect.pointer_table = {{maximum, descriptor_offset}};
+		indirect.table_maximum = maximum;
+		indirect.pointer_offset = descriptor_offset;
 		DescriptorSource source;
 		source.dword_count = handle.NumArgs();
 		source.dwords.fill(Value(0u));

tests/ResourceTrackingTests.cpp

@@ -656,9 +656,9 @@ void TestNestedPointerImageTable() {
   for (const auto source : {plan.info.images[0].source, plan.info.samplers[0].source}) {
     const auto& descriptor = plan.descriptor_sources[source];
     const auto& indirect = descriptor.indirect_descriptor;
-    Check(indirect && !indirect->selector && indirect->pointer_table &&
-              indirect->pointer_table->maximum == 65535u && indirect->table_stride == 592u &&
-              indirect->pointer_table->offset == (descriptor.dword_count == 8u ? 0x3d0u : 0x3f8u),
+    Check(indirect && !indirect->selector && indirect->table_maximum == 65535u &&
+              indirect->table_stride == 592u &&
+              indirect->pointer_offset == (descriptor.dword_count == 8u ? 0x3d0u : 0x3f8u),
           "nested pointer descriptors lost their row geometry or captured the GPU selector payload");
   }