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shader: bound signed image loops from their initial descriptor index

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This commit is contained in:
nmzik
2026-10-13 04:46:51 +02:00
parent 3c9da9c3f4
commit 4e16234d32
2 changed files with 94 additions and 6 deletions
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src/graphics/shader/recompiler/ir/passes/ResourceTracking.cpp
+28 -2
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@@ -2560,10 +2560,36 @@ private:
indirect.key_count = guarded_count;
} else if (table_stride != 32u) {
return false;
} else if (!m_shader_writes) {
if (const auto* bound = BoundedLoop(key, handle.Parent())) {
} else {
uint32_t first = 0;
const auto* bound = BoundedInduction(key, handle.Parent(),
[&](uint32_t initial, uint32_t step) {
first = initial;
return initial <= INT32_MAX && step == 1u;
}, [&](const Inst& compare, uint32_t) {
return (compare.GetOpcode() == ValueOpcode::SLessThan32 ||
(first == 0u && compare.GetOpcode() == ValueOpcode::ULessThan32)) &&
ValidateRuntimeValue(m_program, compare.Arg(1), RuntimeValueType::Integer);
});
if (bound != nullptr) {
indirect.key_count = bound->Arg(1);
indirect.signed_count = bound->GetOpcode() == ValueOpcode::SLessThan32;
if (first != 0u) {
// Clamp before enumerating: negative signed bounds have no reachable keys.
auto& nonempty = m_program.value_storage.emplace_back(ValueOpcode::SGreaterThanEqual32);
nonempty.SetArg(0, bound->Arg(1));
nonempty.SetArg(1, Value(first));
auto& length = m_program.value_storage.emplace_back(ValueOpcode::ISub32);
length.SetArg(0, bound->Arg(1));
length.SetArg(1, Value(first));
auto& count = m_program.value_storage.emplace_back(ValueOpcode::SelectU32);
count.SetArg(0, Value(&nonempty));
count.SetArg(1, Value(&length));
count.SetArg(2, Value(0u));
indirect.key_count = Value(&count);
indirect.selector_first = Value(first);
indirect.signed_count = false;
}
}
}
if (indirect.key_count.IsEmpty() &&