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shader: materialize exact buffer capacity through shared clean reads

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Co-authored-by: shadowbeat070 <70843316+shadowbeat070@users.noreply.github.com>
This commit is contained in:
nmzik
2026-10-04 11:42:09 +04:00
parent 92ac54a493
commit 3ba0e971e9
15 changed files with 333 additions and 176 deletions
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tests/ResourceTrackingTests.cpp
+28
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@@ -2728,6 +2728,33 @@ void TestInvariantLoopPhi() {
"loop-invariant descriptor phi was not evaluated through typed SSA");
}
void TestBufferStoreUsesItsOwnActiveValue() {
Fixture fixture;
const auto lane = fixture.Emit(ValueOpcode::GetBuiltin,
{Value(static_cast<uint32_t>(StageInputKind::LocalInvocationId)), Value(0u)});
const auto guard = fixture.Emit(ValueOpcode::ULessThan32, {lane, Value(16u)});
const auto other_guard = fixture.Emit(ValueOpcode::ULessThan32, {lane, Value(32u)});
const auto inner = fixture.Emit(ValueOpcode::SelectU32, {guard, Value(9u), lane});
const auto data = fixture.Emit(ValueOpcode::SelectU32, {guard, inner, lane});
const auto handle = fixture.Buffer({Value(0x1000u), Value(4u << 16u),
Value(64u), Value(0x16204u)});
MemoryInfo memory;
memory.kind = ResourceKind::Buffer;
const auto store = [&](Value active) {
return fixture.Emit(ValueOpcode::StoreBufferU32,
{handle, Value(0u), Value(0u), Value(0u), data, active},
fixture.AddMemory(memory, 0));
};
const auto matching = store(guard);
const auto different = store(other_guard);
ConstantPropagationPass(fixture.program.blocks);
Check(matching.Instruction()->Arg(4).Resolve() == Value(9u),
"buffer store retained data from its inactive lanes");
Check(different.Instruction()->Arg(4).Resolve() == data.Resolve() &&
data.Resolve().Instruction()->GetOpcode() == ValueOpcode::SelectU32,
"buffer store changed a shared value outside its own EXEC mask");
}
void TestBoundedRelativeRegisterWrites() {
namespace CFG = Libs::Graphics::ShaderRecompiler::CFG;
enum class Variant { Bounded, BoundClobber, DescriptorClobber, EntryBypass };
@@ -3639,6 +3666,7 @@ int main() {
Run("finite image bit scan sentinel", TestFiniteImageBitScanSentinel);
Run("runtime-rooted loop", TestLoopCycleEnteredThroughRuntimeValue);
Run("invariant loop phi", TestInvariantLoopPhi);
Run("buffer store active value", TestBufferStoreUsesItsOwnActiveValue);
Run("bounded relative register writes", TestBoundedRelativeRegisterWrites);
Run("DMA address materialization", TestDmaAddressMaterialization);
Run("dynamic FLAT address", TestDynamicFlatAddressesUseDma);