https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89411
Jim Wilson <wilson at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-03-06
Ever confirmed|0 |1
--- Comment #3 from Jim Wilson <wilson at gcc dot gnu.org> ---
In the caller, riscv_classify_address, we have the address which contains a
symbol. We can get the VAR_DECL from the symbol. We can then get size and
alignment from the symbol. However, there is no guarantee that a decl is in
there, it depends on what kind of symbol this is.
In the aarch64/aarch64.c file, I see code similar to what we need, which among
the checks has this
else if (SYMBOL_REF_DECL (sym))
align = DECL_ALIGN (SYMBOL_REF_DECL (sym));
There is simpler code in the mips/mips.c file in the
mips_offset_within_alignment_p function.
RISC-V is normally strict align, so it should still be safe to assume mode
alignment if strict align is on, if there is no SYMBOL_REF_DECL.
An even simpler solution, as I mentioned earlier, is just
if (mode == BLKmode)
return false;
and that may give a result just as good as checking the SYMBOL_REF_DECL.
