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Title: compiler optimizations violate oparg invariants · Issue #99876 · python/cpython · GitHub

Open Graph Title: compiler optimizations violate oparg invariants · Issue #99876 · python/cpython

X Title: compiler optimizations violate oparg invariants · Issue #99876 · python/cpython

Description: During code-gen, the compiler makes sure that any opcode that does not HAVE_ARG get an oparg value of 0. Then, during optimizations some instructions become NOPs but their oparg is not set to 0, so when we come to emit code we need to ch...

Open Graph Description: During code-gen, the compiler makes sure that any opcode that does not HAVE_ARG get an oparg value of 0. Then, during optimizations some instructions become NOPs but their oparg is not set to 0, so...

X Description: During code-gen, the compiler makes sure that any opcode that does not HAVE_ARG get an oparg value of 0. Then, during optimizations some instructions become NOPs but their oparg is not set to 0, so...

Opengraph URL: https://github.com/python/cpython/issues/99876

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#99877https://github.com/python/cpython/pull/99877
compiler optimizations violate oparg invariantshttps://github.com/python/cpython/issues/99876#top
#99877https://github.com/python/cpython/pull/99877
type-featureA feature request or enhancementhttps://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22type-feature%22
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on Nov 29, 2022https://github.com/python/cpython/issues/99876#issue-1468311255
gh-99876: make optimizer maintain the invariant that oparg == 0 for an instruction that does not have an arg #99877https://github.com/python/cpython/pull/99877
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