Hi,
PR 61393 shows that trans-mem does not play along with IPA-CP (or
anything cloning cgraph_nodes for that matter). It is entirely
possible that simply properly copying tm_clone flag of a node when
cloning it is enough to make it work, but that is something a
trans-mem person has to confirm and we probably do not want to start
doing that now on a release branch anyway.
So, this branch disables IPA-CP for nodes marked as tm_clone on the
4.8 branch. I've confirmed it fixes the PR failure and passes
bootstrap and testing on x86_64-linux (I did not manage to create a
simple testsuite testcase within a few minutes). OK for 4.8?
Thanks,
Martin
2014-06-04 Martin Jambor <mjam...@suse.cz>
PR ipa/61393
* ipa-cp.c (determine_versionability): Pretend that tm_clones are
not versionable.
diff --git a/gcc/ipa-cp.c b/gcc/ipa-cp.c
index d9d69b3..bd45575 100644
--- a/gcc/ipa-cp.c
+++ b/gcc/ipa-cp.c
@@ -447,6 +447,8 @@ determine_versionability (struct cgraph_node *node)
else if (!opt_for_fn (node->symbol.decl, optimize)
|| !opt_for_fn (node->symbol.decl, flag_ipa_cp))
reason = "non-optimized function";
+ else if (node->tm_clone)
+ reason = "transactional memory clone";
if (reason && dump_file && !node->alias && !node->thunk.thunk_p)
fprintf (dump_file, "Function %s/%i is not versionable, reason: %s.\n",
