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shader: prove finite masked selectors for writable buffer tables

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Co-authored-by: fxpw <fxpw@outlook.com>
This commit is contained in:
nmzik
2026-10-14 03:48:26 +02:00
parent be5915c248
commit 8e4c3b5e14
3 changed files with 166 additions and 5 deletions
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src/graphics/shader/recompiler/ir/passes/ResourceTracking.cpp
+25 -5
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@@ -2820,9 +2820,21 @@ private:
if (table_source.dword_count == 2u && MatchPackedScalarKey(key, indirect)) return finish();
if (table_source.dword_count == 2u) {
const auto* bound = BoundedLoop(key, handle.Parent());
if (bound == nullptr) return false;
indirect.key_count = bound->Arg(1);
indirect.signed_count = bound->GetOpcode() == ValueOpcode::SLessThan32;
if (bound != nullptr) {
indirect.key_count = bound->Arg(1);
indirect.signed_count = bound->GetOpcode() == ValueOpcode::SLessThan32;
} else {
// EXEC implications must describe the same iteration as the selected value.
if (m_native_cfg.irreducible || !m_native_cfg.back_edges.empty()) return false;
const auto* lane = key.Resolve().TryInstruction();
if (lane == nullptr || lane->GetOpcode() != ValueOpcode::ReadFirstLane ||
!std::ranges::all_of(handle.Uses(), [&](const Use& use) {
return Implies(use.user->Arg(5), lane->Arg(1));
})) return false;
const auto maximum = SelectorMaximum(lane->Arg(0), {}, 0u, lane->Arg(1));
if (maximum >= MaxIndirectDescriptorProbes) return false;
indirect.key_count = Value(maximum + 1u);
}
return finish();
}
if (table_source.dword_count != 4u || table_offset != 0u || table_immediate != 0u || indexed)
@@ -2897,8 +2909,16 @@ private:
switch (inst->GetOpcode()) {
case ValueOpcode::Phi: {
const auto initial = InitialCandidateMask(value);
return initial.IsEmpty() ? UINT32_MAX
: SelectorMaximum(initial, bounds, depth + 1u, guard);
if (!initial.IsEmpty()) return SelectorMaximum(initial, bounds, depth + 1u, guard);
if (m_native_cfg.irreducible || !m_native_cfg.back_edges.empty() ||
inst->NumArgs() == 0u || (inst->Parent() != nullptr && InCycle(inst->Parent())))
return UINT32_MAX;
uint32_t result = 0u;
for (uint32_t arm = 0; arm < inst->NumArgs(); ++arm) {
result = std::max(result, maximum(arm));
if (result == UINT32_MAX) break;
}
return result;
}
case ValueOpcode::BitFieldUExtract: {
uint32_t width;