gh-111354: simplify detection of RESUME after YIELD_VALUE at except-depth 1 #111459
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iritkatriel requested review from brettcannon, ericsnowcurrently, markshannon, ncoghlan and warsaw as code owners
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Doesn't this mean we lose the optimization for |
bedevere-bot commented Nov 2, 2023
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bedevere-bot commented Nov 2, 2023
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bedevere-bot commented Nov 2, 2023
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bedevere-bot commented Nov 2, 2023
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FullteaR pushed a commit to FullteaR/cpython that referenced this pull request Nov 3, 2023
aisk pushed a commit to aisk/cpython that referenced this pull request Feb 11, 2024
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gen_closeneeds to know whether aRESUMEfollows aYIELD_VALUEwhich is at except-depth 1, for an important optimization. Currently the compiler stores this information in the oparg ofYIELD_VALUE, which requiresgen_closeto peek into the bytecode (which is unsafe in the debugger). This PR puts this information in the oparg of theRESUME, and removes the oparg ofYIELD_VALUE. The result is simpler and safer code in gen_close.It also removes an anomaly in the bytecode definitions, where we needed to add a meaningless assertion to make the code generator understand that YIELD_VALUE has an oparg even though it doesn't use it.
📚 Documentation preview 📚: https://cpython-previews--111459.org.readthedocs.build/