https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101474
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|-fipa-icf generates worse |SRA sometimes produces
|code for identical function |worse code with inline
| |functions (seen with
| |-fipa-icf sometimes)
Ever confirmed|0 |1
Last reconfirmed| |2021-07-16
Status|UNCONFIRMED |NEW
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This worse code generation has nothing to do with -fipa-icf really as shown by:
struct t {
char x;
int y;
};
void fn1(struct t *p, struct t v)
{
*p = v;
}
void fn3(struct t *p, struct t v)
{
fn1(p, v);
}
------ CUT ----
What is happening is SRA decides it is best to do a full scalar replacement for
the v that is inlined into fn3 (from fn1).
