https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123358
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|ice-on-valid-code |ice-on-invalid-code
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Confirmed. I believe this is wrong at gimplification time:
>
> void bar ()
> {
> __asm__ __volatile__("mov %1, %0" : : "m" at);
> }
>
> we'd need to gimplify this to a temporary. We have a CONST_DECL here which
> is what confuses us (we're not going to put that into the constant pool
> I guess). Possibly
>
> 3738 op = expand_expr (val, NULL_RTX, VOIDmode,
> 3739 allows_reg ? EXPAND_NORMAL
> 3740 : allows_mem ? EXPAND_MEMORY
> 3741 : EXPAND_INITIALIZER);
>
> expects that this expands to a MEM because of EXPAND_MEMORY, but it does not
> (errorneously?!).
CONST_DECLs are unconditionally replaced with their value, but it's apparently
TREE_ADDRESSABLE here so we presumably cannot spill it at will.
