http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55797
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> 2013-01-08
14:24:59 UTC ---
Solution to put off recursive inlining through iteration:
Index: ipa-inline.c
===================================================================
--- ipa-inline.c (revision 195014)
+++ ipa-inline.c (working copy)
@@ -1951,7 +1951,9 @@ early_inline_small_functions (struct cgr
if (!can_early_inline_edge_p (e))
continue;
- if (cgraph_edge_recursive_p (e))
+ if (cgraph_edge_recursive_p (e)
+ || !DECL_STRUCT_FUNCTION
+ (callee->symbol.decl)->always_inline_functions_inlined)
{
if (dump_file)
fprintf (dump_file, " Not inlining: recursive call.\n");
as we process functions in DFS order any not already processed function
is in a callgraph cycle. This doesn't fix the overzealeous inlining via
the iteration for the testcase though as we still grow in calls quadratically
(we never hit a direct recursive call when inlining the recursive
sub-callgraph).
That is, early inlining completely misses the graph topology hints
(never inline a SCC entry edge, etc.)
