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6700047: C2 failed in idom_no_update

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Partial peeling shouldn't place clones into loop

Reviewed-by: kvn
This commit is contained in:
Tom Rodriguez 2008-07-25 15:54:23 -07:00
parent 7b4a7f7bdc
commit 20de63f383
2 changed files with 69 additions and 8 deletions
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17
hotspot/src/share/vm/opto/loopopts.cpp
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@ -1891,18 +1891,19 @@ void PhaseIdealLoop::clone_for_use_outside_loop( IdealLoopTree *loop, Node* n, N
_igvn.hash_delete(use);
use->set_req(j, n_clone);
_igvn._worklist.push(use);
Node* use_c;
if (!use->is_Phi()) {
Node* use_c = has_ctrl(use) ? get_ctrl(use) : use->in(0);
set_ctrl(n_clone, use_c);
assert(!loop->is_member(get_loop(use_c)), "should be outside loop");
get_loop(use_c)->_body.push(n_clone);
use_c = has_ctrl(use) ? get_ctrl(use) : use->in(0);
} else {
// Use in a phi is considered a use in the associated predecessor block
Node *prevbb = use->in(0)->in(j);
set_ctrl(n_clone, prevbb);
assert(!loop->is_member(get_loop(prevbb)), "should be outside loop");
get_loop(prevbb)->_body.push(n_clone);
use_c = use->in(0)->in(j);
}
if (use_c->is_CountedLoop()) {
use_c = use_c->in(LoopNode::EntryControl);
}
set_ctrl(n_clone, use_c);
assert(!loop->is_member(get_loop(use_c)), "should be outside loop");
get_loop(use_c)->_body.push(n_clone);
_igvn.register_new_node_with_optimizer(n_clone);
#if !defined(PRODUCT)
if (TracePartialPeeling) {