Hi,
the value 0 in tp_first_run is special meaing that profile is unknown. We
should not set it to 1.
Bootstrapped/regtested x86_64-linux, comitted.
* ipa-split.c (split_function): Preserve 0 tp_first_run.
Index: ipa-split.c
===================================================================
--- ipa-split.c (revision 279076)
+++ ipa-split.c (working copy)
@@ -1369,7 +1369,8 @@ split_function (basic_block return_bb, c
/* Let's take a time profile for splitted function. */
- node->tp_first_run = cur_node->tp_first_run + 1;
+ if (cur_node->tp_first_run)
+ node->tp_first_run = cur_node->tp_first_run + 1;
/* For usual cloning it is enough to clear builtin only when signature
changes. For partial inlining we however cannot expect the part
