> On Oct 29, 2018, at 10:54 AM, Martin Sebor <mse...@gmail.com> wrote:
>
> On 10/29/2018 07:45 AM, Paul Koning wrote:
>> I noticed an inconsistency in the handling of the aligned attribute. When
>> applied to variables, I get an error message if the alignment is too large
>> for the platform. But when applied to functions, there is no error check.
>> The same applies to label alignment (from the -falign-labels switch).
>>
>> The result is an ICE in my target code because it is asked to output
>> assembly language for an alignment not supported by the target.
>>
>> Should these cases also produce error messages? Or should the back end
>> ignore attempts to align too much?
>
> check_user_alignment() in c-attribs.c rejects excessive alignments
> the same for functions and variables:
>
> else if (i >= HOST_BITS_PER_INT - LOG2_BITS_PER_UNIT)
> {
> error ("requested alignment is too large");
> return -1;
> }
>
> so I don't immediately see where this inconsistency comes from
> Is there different/more restrictive handling for variables in
> the back end? (a test case would be great).
I forgot to attach it. Here it is.
paul
testalign.c
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