[3.10] gh-91421: Use constant value check during runtime (GH-91422) #91492
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The left-hand side expression of the if-check can be converted to a constant by the compiler, but the addition on the right-hand side is performed during runtime. Move the addition from the right-hand side to the left-hand side by turning it into a subtraction there. Since the values are known to be large enough to not turn negative, this is a safe operation. Prevents a very unlikely integer overflow on 32 bit systems. Fixes pythonGH-91421. (cherry picked from commit 0859368) Co-authored-by: Tobias Stoeckmann <stoeckmann@users.noreply.github.com>
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@stoeckmann and @JelleZijlstra: Status check is done, and it's a failure ❌ . |
JelleZijlstra
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Apr 13, 2022
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Miss Islington really should sign the CLA.
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@stoeckmann and @JelleZijlstra: Status check is done, and it's a failure ❌ . |
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@stoeckmann and @JelleZijlstra: Status check is done, and it's a success ✅ . |
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The left-hand side expression of the if-check can be converted to a
constant by the compiler, but the addition on the right-hand side is
performed during runtime.
Move the addition from the right-hand side to the left-hand side by
turning it into a subtraction there. Since the values are known to
be large enough to not turn negative, this is a safe operation.
Prevents a very unlikely integer overflow on 32 bit systems.
Fixes GH-91421.
(cherry picked from commit 0859368)
Co-authored-by: Tobias Stoeckmann stoeckmann@users.noreply.github.com