ix86_data_alignment: bad defaults?
DJ Delorie
dj@redhat.com
Fri Feb 23 01:14:00 GMT 2007
> Yes, BIGGEST_ALIGNMENT is supposed to be the biggest alignment the
> compiler will ever use.
Will ever use, or can ever use? Based on the code, it looks like "can
ever use" - i.e. it's an edict to the compiler to not exceed that
value, thus varasm warns when you exceed it.
> So if ix86_data_alignment wants to return 256 for some variable,
> then it seems to me that BIGGEST_ALIGNMENT should be 256.
What if the object format doesn't allow recording alignments that
high? For example, DJGPP's coff format can only record alignments up
to 2**4 (16) bytes, but 256 bits is 2**5 (32) bytes.
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