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Re: [PATCHv2] sysdeps/ieee754/soft-fp: ignore maybe-uninitialized with -O [BZ #19444]
On Sun, 30 Sep 2018, Martin Jansa wrote:
> +#include <libc-diag.h>
> +/* R_f are not set in cases where it is not used in packing, but the
> + compiler does not see that it is set in all cases where it is
> + used, resulting in warnings that it may be used uninitialized.
> + The location of the warning differs in different versions of GCC,
> + it may be where R is defined using a macro or it may be where the
> + macro is defined. */
This comment is missing the key information that it's specifically a
warning seen with -O1.
Joseph S. Myers