https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86968
Thomas Preud'homme <thopre01 at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |thopre01 at gcc dot gnu.org
--- Comment #7 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Thomas Preud'homme from comment #6)
> Happens at expand time. Diving in.
There's a giant if in expand_expr_real_1 with the following comment:
/* In cases where an aligned union has an unaligned object
as a field, we might be extracting a BLKmode value from
an integer-mode (e.g., SImode) object. Handle this case
by doing the extract into an object as wide as the field
(which we know to be the width of a basic mode), then
storing into memory, and changing the mode to BLKmode. */
The "if" is entered in the big endian unaligned case but not in the other case.
In the aligned case, it continues after the if until the call to
flip_storage_order which will generate the bswap.
