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bpo-43760: Streamline dispatch sequence for machines without computed gotos. #25244

Merged
merged 3 commits into from
Apr 8, 2021
Merged

bpo-43760: Streamline dispatch sequence for machines without computed gotos. #25244

merged 3 commits into from
Apr 8, 2021

Commits on Apr 7, 2021

  1. Streamline dispatch sequence for machines without computed gotos. 

    * Do fetch and decode at end of opocde then jump directly to switch.
  Should allow compilers that don't support computed-gotos, specifically MSVC,
  to generate better code.
    @markshannon
    markshannon committed Apr 7, 2021
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  2. Restore stack_pointer before jumping to error handling, in case trace… 

    … function changed frame *and* raised an exception.
    @markshannon
    markshannon committed Apr 7, 2021
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Commits on Apr 8, 2021

  1. Clarifications suggested by GvR and R Hettinger.

    @markshannon
    markshannon committed Apr 8, 2021
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