On 2015-12-04 12:49, Victor Stinner wrote:
[snip]

Constant folding
================

This optimization propagates constant values of variables. Example:

     def func()
         x = 1
         y = x
         return y

Constant folding:

     def func()
         x = 1
         y = 1
         return 1

[snip]

I don't think that's constant folding, but constant _propagation_.

Constant folding is when, say, "1 + 2" replaced by "2".

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