------- Comment #8 from rguenth at gcc dot gnu dot org 2007-11-22 22:00 -------
Same results on current trunk. Early inlining is already doing it because we
think putchs size (4 insns) when inlined will reduce the compilation units
size by 4 insns (the out-of-line copy of putch).
putchs IL before inlining looks like
<bb 2>:
<bb 4>:
D.1182_2 ={v} *43B;
D.1183_3 = (int) D.1182_2;
D.1184_4 = D.1183_3 & 32;
if (D.1184_4 == 0)
goto <bb 4>;
else
goto <bb 3>;
<bb 3>:
ch.0_7 = (volatile unsigned char) ch_6(D);
*44B ={v} ch.0_7;
return;
we count INDIRECT_REFs as having no cost, the only thing what counts
is the BIT_AND_EXPR and the comparison. Constants and registers also
have no cost.
Considering the (currently) recursive structure of estimate_num_insns_1
it is non-trivial to adjust the container-like reference trees (but
the INDIREC_REF ones).
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
GCC target triplet|*-*-* |
Keywords| |missed-optimization
Known to fail|4.1.2 |4.1.2 4.3.0
Last reconfirmed|0000-00-00 00:00:00 |2007-11-22 22:00:55
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31528
