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shader: bound GPU-selected record descriptors by scalar table geometry

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This commit is contained in:
nmzik
2026-10-14 14:45:56 +02:00
parent 150bcb06a9
commit 9cc0bba80b
4 changed files with 320 additions and 48 deletions
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src/graphics/shader/recompiler/ir/passes/ResourceTracking.cpp
+18 -2
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@@ -470,7 +470,16 @@ public:
auto* block = anchor->Parent();
const auto where = std::ranges::find_if(block->Instructions(),
[&](const Inst& inst) { return &inst == anchor; });
auto& selection = *block->PrependNewInst(where, ValueOpcode::GetBufferResourceIndex, {plan.key});
const auto& indirect = *m_sources[plan.source].indirect_descriptor;
if (indirect.table_scalar) {
// Wrapped affine offsets span one power-of-two congruence class.
// Keep the existing mapping's byte key while compressing its empty gaps.
key = plan.reads[0]->Arg(1);
const auto shift = std::countr_zero(indirect.table_stride) - 2u;
if (shift != 0u) key = Value(&*block->PrependNewInst(
where, ValueOpcode::ShiftRightLogical32, {key, Value(shift)}));
}
auto& selection = *block->PrependNewInst(where, ValueOpcode::GetBufferResourceIndex, {key});
selection.SetFlags(plan.handle->Flags<uint32_t>());
selected = Value(&selection);
buffer_selections.emplace_back(&plan, selected);
@@ -2875,7 +2884,14 @@ private:
indirect.signed_count = bound->GetOpcode() == ValueOpcode::SLessThan32;
return finish();
}
if (!legacy_store || table_stride != 16u) return false;
if (!legacy_store) {
// A bounded V# supplies every reachable descriptor without reading the GPU key.
// Separate U32 offsets could wrap each DWORD to a different table position.
if (table_source.dword_count != 4u || plan.split_offsets) return false;
indirect.table_scalar = true;
return finish();
}
if (table_stride != 16u) return false;
if (table_source.dword_count == 2u) {
if (!MatchPackedScalarKey(key, indirect)) {
// EXEC implications must describe the same iteration as the selected value.