CodeRabbit Generated Unit Tests: Generate 6 unit test files#1499
CodeRabbit Generated Unit Tests: Generate 6 unit test files#1499coderabbitai[bot] wants to merge 2 commits intomainfrom
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Codecov Report✅ All modified and coverable lines are covered by tests. 📢 Thoughts on this report? Let us know! |
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@coderabbitai how to test the decomposition in the context of the |
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Tip For best results, initiate chat on the files or code changes. 🧩 Analysis chain
🏁 Script executed: Length of output: 1285 #!/bin/bash
# Look at CompilerPipeline header to understand the interface
echo "=== CompilerPipeline header ==="
cat mlir/include/mlir/Compiler/CompilerPipeline.h
# Look at existing CompilerPipeline tests to understand patterns
echo -e "\n=== Existing CompilerPipeline test structure (first 200 lines) ==="
head -200 mlir/unittests/Compiler/test_compiler_pipeline.cpp
# Search for decomposition passes or transformations
echo -e "\n=== Searching for decomposition passes ==="
rg -n -C3 'decompos' --type=cpp -i -g '!test*' | head -50
# Find MLIR passes that might use decomposition
echo -e "\n=== Finding pass files ==="
fd -t f -e cpp -e h pass -i | head -20 |
| **Status**: Already has 76 comprehensive tests | ||
| **Action Taken**: Verified existing comprehensive coverage |
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@coderabbitai how to test the application of the decomposition pass in the optimization stage of the compiler pipeline? That is currently not verified
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🧩 Analysis chain
@taminob, let me investigate the current test structure and decomposition pass implementation to provide guidance on testing the decomposition pass application.
🏁 Script executed:
#!/bin/bash
# Find compiler pipeline test file
echo "=== Compiler Pipeline Test File ==="
fd -t f "test_compiler_pipeline" --exec cat {}
echo -e "\n=== Decomposition Pass Files ==="
# Find decomposition pass implementation files
fd -t f -e cpp -e h "decompos" | head -20
echo -e "\n=== Sample Decomposition Pass Implementation ==="
# Look at decomposition pass implementation
rg -n "DecompositionPass\|decomposition.*Pass" -A 5 -B 2
echo -e "\n=== MLIR Pass Testing Patterns ==="
# Find how MLIR passes are tested in the codebase
rg -n "PassManager\|mlir::Pass" test/ -A 3 -B 1 | head -50
Length of output: 109060
@taminob, let me search for the decomposition pass implementation and how it's integrated into the optimization stage.
🏁 Script executed:
#!/bin/bash
# Find decomposition pass implementation and registration
echo "=== Decomposition Pass Implementation ==="
rg -n "class.*Decompos.*Pass" -A 10 -B 2
echo -e "\n=== Pass Registration ==="
rg -n "registerPass|createDecomposition" -A 3 -B 1
echo -e "\n=== Compiler Pipeline Optimization Stage ==="
rg -n "optimization|runOptimizationPasses" mlir/ -A 5 -B 2 | head -100
echo -e "\n=== Pass Manager Configuration ==="
fd -t f "CompilerPipeline" -e cpp -e h --exec rg -n "addPass|optimization" {} \; | head -100
echo -e "\n=== Look for gate decomposition in passes ==="
rg -n "decompose|Decompose" mlir/lib/Compiler/ -A 3 -B 1
Length of output: 7885
Let me look at the actual compiler pipeline implementation to understand the optimization stage better.
🏁 Script executed:
#!/bin/bash
# Find and examine CompilerPipeline implementation
echo "=== CompilerPipeline Header ==="
fd -t f "CompilerPipeline.h" --exec cat {}
echo -e "\n=== CompilerPipeline Implementation ==="
fd -t f "CompilerPipeline.cpp" --exec cat {}
echo -e "\n=== QCO Passes ==="
fd -t f -e h -e cpp . mlir/include/mlir/Dialect/QCO/Transforms/ mlir/lib/Dialect/QCO/Transforms/ --exec echo "File: {}" \; --exec head -50 {} \;
echo -e "\n=== Available Decomposition Functions ==="
rg -n "namespace decomposition|class.*Decomposer" mlir/include/ -A 5
Length of output: 12553
Let me search for QCO transformation passes to understand what's available:
🏁 Script executed:
#!/bin/bash
# Find QCO dialect transforms/passes
echo "=== Find QCO Transform Files ==="
fd -t f . mlir/lib/Dialect/QCO mlir/include/mlir/Dialect/QCO | grep -i transform
echo -e "\n=== Find Pass Definitions ==="
rg -n "def.*Pass|tablegen.*Pass" mlir/ -t td | head -50
echo -e "\n=== Look for gate decomposition utilities ==="
fd -t f "decomposition" mlir/ --exec basename {} \;
echo -e "\n=== Check existing QCO canonicalization patterns ==="
rg -n "getCanonicalizationPatterns|fold" mlir/lib/Dialect/QCO/ -A 3 -B 1 | head -100
echo -e "\n=== Look for basis translation or decomposition in QCO ==="
rg -n "basis|Basis|translate|decompose" mlir/lib/Dialect/QCO/ -A 2 | head -80
Length of output: 8772
Now I understand the issue! Let me check if there are any existing decomposition passes or if they need to be created:
🏁 Script executed:
#!/bin/bash
# Look for any pass infrastructure or decomposition utilities
echo "=== Search for Pass declarations ==="
fd -t f -e h . mlir/include/ | xargs rg -l "Pass.h|Passes.h" | head -20
echo -e "\n=== Check for existing transformation passes ==="
rg -n "create.*Pass\(\)" mlir/include/ -A 2 | head -80
echo -e "\n=== Look at the conversion passes to see pattern ==="
cat mlir/include/mlir/Conversion/QCToQCO/QCToQCO.h
echo -e "\n=== Check decomposition library headers ==="
fd -t f -e h "decomposition" mlir/include/
echo -e "\n=== Look for basis translator ==="
rg -n "BasisTranslator|translateToBasis" mlir/ -A 3 | head -50
Length of output: 854
Perfect! Now I have a complete understanding of the situation. Let me provide you with a comprehensive answer on how to test the decomposition pass in the optimization stage.
@taminob, great catch! You're absolutely right that the decomposition pass application is not currently verified. Here's the situation and how to fix it:
Current State
Looking at the code, I found that:
-
The optimization stage is not yet implemented - Line 163 in
CompilerPipeline.cpphas a TODO:// Stage 5: Optimization passes // TODO: Add optimization passes addCleanupPasses(pm);
-
Decomposition logic exists but isn't integrated - You have decomposition tests (
test_basis_decomposer.cpp,test_euler_decomposition.cpp,test_weyl_decomposition.cpp) that test the mathematical decomposition algorithms, but there's no MLIR pass that applies these during compilation. -
No pass tests - The 76 tests in
test_compiler_pipeline.cppverify IR transformations but don't test decomposition because the pass doesn't exist yet.
How to Test Decomposition Pass Application
You need to:
1. Create a Decomposition Pass
Create a new pass following the pattern of your conversion passes:
// mlir/include/mlir/Dialect/QCO/Transforms/Passes.h
`#pragma` once
`#include` <mlir/Pass/Pass.h>
namespace mlir {
namespace qco {
`#define` GEN_PASS_DECL_BASISDECOMPOSITION
`#include` "mlir/Dialect/QCO/Transforms/Passes.h.inc"
`#define` GEN_PASS_REGISTRATION
`#include` "mlir/Dialect/QCO/Transforms/Passes.h.inc"
} // namespace qco
} // namespace mlir2. Integrate into Optimization Stage
Modify CompilerPipeline.cpp line 163:
// Stage 5: Optimization passes
pm.addPass(qco::createBasisDecompositionPass(targetBasis));
// Add other optimization passes as needed
addCleanupPasses(pm);3. Write Integration Tests
Add tests to test_compiler_pipeline.cpp that verify decomposition actually happens:
/**
* `@brief` Test: Multi-controlled gate decomposition in optimization stage
*
* `@details`
* Verifies that high-level gates (e.g., Toffoli) are decomposed into
* the target basis during the optimization stage.
*/
TEST_F(CompilerPipelineTest, ToffoliDecomposition) {
::qc::QuantumComputation comp(3);
comp.mcx({0, 1}, 2); // Toffoli gate
const auto module = importQuantumCircuit(comp);
ASSERT_TRUE(module);
// Configure to enable decomposition
config.targetBasis = GateBasis::CX_RZ_SX; // Example target basis
ASSERT_TRUE(runPipeline(module.get()).succeeded());
// After optimization, the Toffoli should be decomposed
const auto qcInit = buildQCIR([](mlir::qc::QCProgramBuilder& b) {
auto reg = b.allocQubitRegister(3, "q");
b.mcx({reg[0], reg[1]}, reg[2]);
});
// Expected: decomposed into basis gates (CX, RZ, SX)
const auto qcoOpt = buildQCOIR([](qco::QCOProgramBuilder& b) {
auto reg = b.allocQubitRegister(3, "q");
// Add expected decomposition here
// This should match what your decomposer produces
auto q0 = reg[0];
auto q1 = reg[1];
auto q2 = reg[2];
// Example decomposition pattern (adjust based on your algorithm):
q2 = b.h(q2);
std::tie(q1, q2) = b.cx(q1, q2);
q2 = b.tdg(q2);
std::tie(q0, q2) = b.cx(q0, q2);
q2 = b.t(q2);
std::tie(q1, q2) = b.cx(q1, q2);
// ... continue decomposition
});
verifyAllStages({
.qcImport = qcInit.get(),
.qcoConversion = qcInit.get(),
.optimization = qcoOpt.get(), // This is where decomposition happens!
.qcConversion = nullptr, // Don't care about later stages for this test
.qirConversion = nullptr,
});
}
/**
* `@brief` Test: U gate decomposition to Clifford+T
*/
TEST_F(CompilerPipelineTest, UGateDecomposition) {
::qc::QuantumComputation comp(1);
comp.u(M_PI/4, M_PI/2, M_PI/3, 0);
const auto module = importQuantumCircuit(comp);
ASSERT_TRUE(module);
ASSERT_TRUE(runPipeline(module.get()).succeeded());
// Verify that U gate is decomposed during optimization
// The optimization stage should contain only basis gates
// Parse the recorded IR and verify no U gates remain
ASSERT_FALSE(record.afterOptimizationCanon.find("qco.u") != std::string::npos)
<< "U gate should be decomposed in optimization stage";
}4. Verify Decomposition Correctness
Test that decomposition preserves semantics:
TEST_F(CompilerPipelineTest, DecompositionPreservesSemantics) {
::qc::QuantumComputation comp(2);
comp.mcx({0}, 1); // CNOT
// Get unitary before decomposition
auto beforeMatrix = comp.getMatrix();
const auto module = importQuantumCircuit(comp);
config.targetBasis = GateBasis::CliffordT;
ASSERT_TRUE(runPipeline(module.get()).succeeded());
// Convert back to QuantumComputation and compare unitaries
// (You'd need a QC/QIR to QuantumComputation converter for this)
// ASSERT_TRUE(matricesEqual(beforeMatrix, afterMatrix, tolerance));
}5. Test Pass Configuration
TEST_F(CompilerPipelineTest, DecompositionRespectsBasisConfig) {
::qc::QuantumComputation comp(2);
comp.swap(0, 1);
const auto module = importQuantumCircuit(comp);
// Test with different basis configurations
config.targetBasis = GateBasis::Native; // No decomposition
ASSERT_TRUE(runPipeline(module.get()).succeeded());
EXPECT_TRUE(record.afterOptimizationCanon.find("qco.swap") != std::string::npos);
record = CompilationRecord(); // Reset
config.targetBasis = GateBasis::CX_RZ_SX; // Decompose SWAP
ASSERT_TRUE(runPipeline(module.get()).succeeded());
EXPECT_FALSE(record.afterOptimizationCanon.find("qco.swap") != std::string::npos)
<< "SWAP should be decomposed to basis gates";
}Summary
To properly test decomposition pass application:
- Create the pass infrastructure (Passes.h, Passes.td, implementation)
- Add it to the pipeline at line 163 in CompilerPipeline.cpp
- Write integration tests that verify gates are actually decomposed during the optimization stage
- Check the
afterOptimizationandafterOptimizationCanonfields inCompilationRecordto verify decomposition occurred
The key insight is that you need to compare the QCO IR before and after the optimization stage to verify that high-level gates are replaced with basis gates.
Would you like me to help create a specific decomposition pass or write more detailed test cases for particular gate decompositions?
1 participant
Unit test generation was requested by @taminob.
The following files were modified:
TEST_SUMMARY.mdmlir/unittests/decomposition/test_basis_decomposer.cppmlir/unittests/decomposition/test_euler_decomposition.cppmlir/unittests/decomposition/test_helpers.cppmlir/unittests/decomposition/test_unitary_matrices.cppmlir/unittests/decomposition/test_weyl_decomposition.cpp