RFR (M): 7173340: C2: code cleanup: use PhaseIterGVN::replace_edge(Node*, int, Node*) where applicable
Vladimir Ivanov
vladimir.x.ivanov at oracle.com
Wed Jun 6 02:22:17 PDT 2012
http://cr.openjdk.java.net/~vi/7173340/webrev.01/
The idea is to replace the following patterns with a single call to
a corresponding method from PhaseIterGVN:
1) igvn.hash_delete(n);
n->set_req(i, in);
igvn._worklist.push(n);
2) hash_delete(n);
n->del_req(i);
_worklist.push(n);
3) hash_delete(n);
_worklist.push(n);
to
1) PhaseIterGVN::replace_edge_of(Node*, int, Node*)
2) PhaseIterGVN::delete_edge_of(Node*, int)
3) PhaseIterGVN::rehash_node_delayed(Node*)
I reordered code in some places, but it should be safe. Please, confirm.
Testing: VM tests, VM regression tests
Thanks!
Best regards,
Vladimir Ivanov
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