On 10/29/2018 09:19 AM, Paul Koning wrote:
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.
I don't see any errors with the test case on x86_64. In GDB I see
the alignment for ag is 524288 and MAX_OFILE_ALIGNMENT is 2147483648.
What target do you see the error with?
Martin
