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JIT stencil generation for i686-pc-windows-msvc has issues with SSE #146365
Description
Bug report
Bug description:
When working on adding float operations in #146307 the bytecode generation the CI failed for only the [i686-pc-windows-msvc] build. Link to failing CI:
We can make the CI run by adding the -mno-sse flags:
Ideally we should not have to disable SSE at this might hurt performance.
CPython versions tested on:
CPython main branch
Operating systems tested on:
No response
Activity
Fidget-Spinner commentedon Mar 24, 2026
I propose instead we drop support for 32 bit Windows. It's an extra platform and we could do with less maintenance burden. Few people use it and more importantly the JIT is not performant on there.
markshannon commentedon Mar 24, 2026
I'm in favour of dropping support for 32 bit Windows.
@brandtbucher what do you think?
Fidget-Spinner commentedon Mar 24, 2026
Another point: dropping 32-bit Windows means we can tag more bits in the JIT, which allows u to do more reference optimizations, something we definitely want.