https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65076
--- Comment #29 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I also tested with -Os and compile times seems about same as for 4.9 modulo
noise.
The following one liner brings instruction and function count in final binary
to same as in 4.9:
Index: ipa-inline.c
===================================================================
--- ipa-inline.c (revision 221757)
+++ ipa-inline.c (working copy)
@@ -1099,7 +1099,7 @@ edge_badness (struct cgraph_edge *edge,
numerator = numerator >> 11;
denominator = growth;
if (callee_info->growth > 0)
- denominator *= callee_info->growth;
+ denominator *= callee_info->growth * callee_info->growth;
badness = - numerator / denominator;
I think this makes a lot of sense - it somehow makes growth of a given call
more important than growth for inlining everything and it also makes inliner to
more strongly prefer small growth, so I think I will commit it after testing
with plan for quick reversal if some benchmarks decrease significantly. (in
fact I had that patch scheduled for bechmarking for couple months)
I am testing it on my copy of C++ suite and will try to run firefox benchmarks
and look for off-noise differences.
