http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8081
--- Comment #28 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-01-13
11:21:34 UTC ---
> OTOH as GIMPLE cannot deal with VLAs on the LHS of a CALL when not applying
> RSO
> the above is correct anyway.
Right, gimplify_return_expr already has a similar provision:
else if (aggregate_value_p (result_decl, TREE_TYPE (current_function_decl)))
{
if (TREE_CODE (DECL_SIZE (result_decl)) != INTEGER_CST)
{
if (!TYPE_SIZES_GIMPLIFIED (TREE_TYPE (result_decl)))
gimplify_type_sizes (TREE_TYPE (result_decl), pre_p);
/* Note that we don't use gimplify_vla_decl because the RESULT_DECL
should be effectively allocated by the caller, i.e. all calls to
this function must be subject to the Return Slot Optimization. */
gimplify_one_sizepos (&DECL_SIZE (result_decl), pre_p);
gimplify_one_sizepos (&DECL_SIZE_UNIT (result_decl), pre_p);
}
result = result_decl;
}
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