Jan Hubicka <hubi...@ucw.cz> writes:
> the problem is sign overflow in time computation. Time should be
> capped by MAX_TIME and we compute MAX_TIME * INLINE_SIZE_SCALE *
> 2. This happens to be >2^31 & <2^32 so we overflow here because of use
> of signed arithmetics.
>
> Index: ipa-inline-analysis.c
> ===================================================================
> --- ipa-inline-analysis.c (revision 179266)
> +++ ipa-inline-analysis.c (working copy)
> @@ -92,7 +92,7 @@ along with GCC; see the file COPYING3.
> /* Estimate runtime of function can easilly run into huge numbers with many
> nested loops. Be sure we can compute time * INLINE_SIZE_SCALE in integer.
> For anything larger we use gcov_type. */
> -#define MAX_TIME 1000000
> +#define MAX_TIME 500000
>
> /* Number of bits in integer, but we really want to be stable across
> different
> hosts. */
Could you update the comment too? ("time * INLINE_SIZE_SCALE * 2")
Richard
