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6851742: (EA) allocation elimination doesn't work with UseG1GC

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Fix eliminate_card_mark() to eliminate G1 pre/post barriers.

Reviewed-by: never
This commit is contained in:
Vladimir Kozlov 2009-07-16 14:10:42 -07:00
parent a24ea182cc
commit c3efa899b6
12 changed files with 315 additions and 232 deletions
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13
hotspot/src/share/vm/opto/ifnode.cpp
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@ -378,7 +378,18 @@ static Node* split_if(IfNode *iff, PhaseIterGVN *igvn) {
// Force the original merge dead
igvn->hash_delete(r);
r->set_req_X(0,NULL,igvn);
// First, remove region's dead users.
for (DUIterator_Last lmin, l = r->last_outs(lmin); l >= lmin;) {
Node* u = r->last_out(l);
if( u == r ) {
r->set_req(0, NULL);
} else {
assert(u->outcnt() == 0, "only dead users");
igvn->remove_dead_node(u);
}
l -= 1;
}
igvn->remove_dead_node(r);
// Now remove the bogus extra edges used to keep things alive
igvn->remove_dead_node( hook );