Richard Smith 96c899449b C++ DR2026: static storage duration variables are not zeroed before ...

constant initialization.

Removing this zeroing regressed our code generation in a few cases, also
fixed here. We now compute whether a variable has constant destruction
even if it doesn't have a constant initializer, by trying to destroy a
default-initialized value, and skip emitting a trivial default
constructor for a variable even if it has non-trivial (but perhaps
constant) destruction.

2020-02-06 16:37:22 -08:00

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