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// SPDX-License-Identifier: GPL-3.0-or-later
#include "rcc/CodeGen/MachineMetadata.h"
#include "Target/TestTarget.h"
#include "rcc/CodeGen/InstructionDescriptor.h"
#include "rcc/CodeGen/MachineFunction.h"
#include "rcc/CodeGen/MachineFunctionCloner.h"
#include "rcc/CodeGen/MachineVerifier.h"
#include "rcc/CodeGen/TargetDescription.h"
#include <cstdint>
#include <iostream>
#include <memory>
#include <string>
#include <string_view>
#include <utility>
#include <vector>
namespace {
constexpr std::uint32_t NopOpcode = 1;
class TestContext final {
public:
void expect(bool Condition, std::string_view Message) {
if (Condition)
return;
std::cerr << Message << '\n';
++FailureCount;
}
[[nodiscard]] int result() const noexcept {
return FailureCount == 0 ? 0 : 1;
}
private:
int FailureCount = 0;
};
[[nodiscard]] rcc::Expected<rcc::TargetDescription> createTarget() {
rcc::InstructionDescriptor Nop;
Nop.InstructionOpcode = rcc::Opcode::fromValue(NopOpcode);
Nop.Name = "TEST_NOP";
Nop.Flags = {rcc::InstructionFlag::ProducesCode};
std::vector<rcc::InstructionDescriptor> Descriptors;
Descriptors.push_back(std::move(Nop));
auto Instructions = rcc::InstructionSet::create(std::move(Descriptors));
if (!Instructions)
return std::unexpected(Instructions.error());
return rcc::test::createTestTargetDescription(std::move(*Instructions));
}
[[nodiscard]] std::unique_ptr<rcc::MachineFunction>
createFunction(TestContext &Context, std::uint64_t StableID, std::string Name) {
auto Function = rcc::MachineFunction::create(std::move(Name),
rcc::MachineFunctionStableID::fromValue(StableID));
Context.expect(Function.has_value(), "machine function creation must succeed");
if (!Function)
return nullptr;
return std::move(*Function);
}
[[nodiscard]] rcc::MachineMetadataElement
referenceElement(TestContext &Context, rcc::MachineMetadataReference Reference) {
auto Element = rcc::MachineMetadataElement::reference(Reference);
Context.expect(Element.has_value(), "valid machine metadata references must form elements");
return Element ? std::move(*Element) : rcc::MachineMetadataElement{};
}
void testReferenceIdentity(TestContext &Context) {
const rcc::MachineMetadataReference Invalid;
const rcc::MachineMetadataReference EmbeddedZero = rcc::MachineMetadataReference::embeddedIR(0);
const rcc::MachineMetadataReference FunctionZero =
rcc::MachineMetadataReference::machineFunction(0);
Context.expect(!Invalid.isValid() && EmbeddedZero.isValid() && FunctionZero.isValid(),
"metadata slot zero must be valid in both explicit reference scopes");
Context.expect(EmbeddedZero != FunctionZero &&
EmbeddedZero.scope() == rcc::MachineMetadataScope::EmbeddedIR &&
FunctionZero.scope() == rcc::MachineMetadataScope::MachineFunction &&
EmbeddedZero.slot() == 0 && FunctionZero.slot() == 0,
"embedded and function-local metadata slots must have distinct identities");
Context.expect(!rcc::MachineMetadataElement::reference(Invalid),
"an invalid metadata reference must not form an element");
}
void testOrderedGraphValidation(TestContext &Context) {
rcc::MachineMetadataInfo Metadata;
rcc::MachineMetadataNode First{
.Slot = 0,
.IsDistinct = true,
.Elements =
{
referenceElement(Context, rcc::MachineMetadataReference::embeddedIR(0)),
rcc::MachineMetadataElement::string(""),
referenceElement(Context, rcc::MachineMetadataReference::machineFunction(1)),
},
};
Context.expect(Metadata.addNode(std::move(First)).has_value() && !Metadata.verify(),
"forward references must be accepted before graph closure is verified");
rcc::MachineMetadataNode Second{
.Slot = 1,
.IsDistinct = false,
.Elements =
{
referenceElement(Context, rcc::MachineMetadataReference::machineFunction(0)),
rcc::MachineMetadataElement::string("payload"),
},
};
Context.expect(Metadata.addNode(std::move(Second)).has_value() && Metadata.verify().has_value(),
"closed cyclic metadata tuple graphs must be valid");
Context.expect(Metadata.nodes().size() == 2 && Metadata.nodes()[0].Slot == 0 &&
Metadata.nodes()[0].IsDistinct && Metadata.nodes()[1].Slot == 1 &&
Metadata.node(0) == &Metadata.nodes()[0] &&
Metadata.node(1) == &Metadata.nodes()[1] && Metadata.node(2) == nullptr,
"metadata definitions and lookup must preserve deterministic source order");
Context.expect(Metadata.nodes()[0].Elements[1].string() != nullptr &&
Metadata.nodes()[0].Elements[1].string()->empty(),
"empty metadata strings must remain valid tuple elements");
const std::size_t OriginalSize = Metadata.nodes().size();
Context.expect(!Metadata.addNode({.Slot = 0, .IsDistinct = false, .Elements = {}}) &&
Metadata.nodes().size() == OriginalSize,
"duplicate metadata definitions must be rejected without changing the graph");
auto Clone = Metadata.clone();
Context.expect(Clone.has_value() && *Clone == Metadata &&
Clone->nodes().data() != Metadata.nodes().data(),
"metadata graphs must support independent deterministic deep cloning");
rcc::MachineMetadataInfo InvalidMetadata;
rcc::MachineMetadataNode InvalidNode;
InvalidNode.Elements.emplace_back();
Context.expect(!InvalidMetadata.addNode(std::move(InvalidNode)) &&
InvalidMetadata.nodes().empty(),
"invalid tuple elements must be rejected before publication");
}
void testFunctionVerifierAndClone(TestContext &Context) {
auto Target = createTarget();
auto Function = createFunction(Context, 1, "metadata");
if (!Target || Function == nullptr)
return;
Context.expect(
Function->metadata()
.addNode({
.Slot = 7,
.IsDistinct = false,
.Elements =
{
referenceElement(Context, rcc::MachineMetadataReference::embeddedIR(3)),
rcc::MachineMetadataElement::string("root"),
},
})
.has_value() &&
Function->metadata()
.addNode({
.Slot = 2,
.IsDistinct = true,
.Elements =
{
referenceElement(Context,
rcc::MachineMetadataReference::machineFunction(7)),
},
})
.has_value() &&
rcc::MachineVerifier::verify(*Function, *Target).has_value(),
"well-formed machine metadata must pass unified function verification");
auto Clone =
rcc::cloneMachineFunction(*Function, *Target,
{
.NewStableID = rcc::MachineFunctionStableID::fromValue(2),
.NewName = std::string("metadata.clone"),
});
Context.expect(Clone.has_value() && Clone->ClonedFunction->metadata() == Function->metadata() &&
Clone->ClonedFunction->metadata().nodes().data() !=
Function->metadata().nodes().data(),
"function cloning must preserve an independent metadata graph");
auto InvalidFunction = createFunction(Context, 3, "invalid-metadata");
if (InvalidFunction == nullptr)
return;
Context.expect(
InvalidFunction->metadata()
.addNode({
.Slot = 0,
.Elements =
{
referenceElement(Context,
rcc::MachineMetadataReference::machineFunction(99)),
},
})
.has_value() &&
!rcc::MachineVerifier::verify(*InvalidFunction, *Target),
"the unified verifier must reject undefined function-local metadata references");
}
} // namespace
int main() {
TestContext Context;
testReferenceIdentity(Context);
testOrderedGraphValidation(Context);
testFunctionVerifierAndClone(Context);
return Context.result();
}
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