Fix qft-plugins for custom 'qft' gates #13181
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alexanderivrii
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Changelog: Bugfix
mtreinish
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stable backport potential
jakelishman
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| # HighLevelSynthesis should replace the custom gate called "qft" | ||
| # by the user-provided definition. | ||
| self.assertEqual(Operator(qc2), Operator(qct)) |
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This test confused me at first, because I was expecting the test to be that HighLevelSynthesis had not turned it into a QFT equivalent, but the trick is that qc2 doesn't actually encode a QFT, so the test does the right thing.
I'm fine to merge like this, just commenting more because I got a bit confused and felt like broadcasting that fact.
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(cherry picked from commit 2245a4f) # Conflicts: # qiskit/transpiler/passes/synthesis/hls_plugins.py # test/python/transpiler/test_high_level_synthesis.py
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(cherry picked from commit 2245a4f)
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Summary
The
HighLevelSynthesistranspiler pass no longer raises an exception when encountering a custom gate that is called "qft" but is not an instance of classQFTGate. Instead, the synthesis plugins for QFT gates ignore such a gate, and the gate's definition is used (if provided).Fixes #13120 and #13174.
The PR is very short and has backport potential (if desired).