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7092905: C2: Keep track of the number of dead nodes

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Keep an (almost) accurate running count of the reachable (live) flow graph nodes.

Reviewed-by: kvn, twisti, jrose, vlivanov
This commit is contained in:
Bharadwaj Yadavalli 2012-11-27 17:24:15 -08:00
parent 96562be9e5
commit 2d2532e740
28 changed files with 306 additions and 120 deletions
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4
hotspot/src/share/vm/opto/graphKit.cpp
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@ -153,7 +153,7 @@ void GraphKit::verify_exception_state(SafePointNode* ex_map) {
void GraphKit::stop_and_kill_map() {
SafePointNode* dead_map = stop();
if (dead_map != NULL) {
dead_map->disconnect_inputs(NULL); // Mark the map as killed.
dead_map->disconnect_inputs(NULL, C); // Mark the map as killed.
assert(dead_map->is_killed(), "must be so marked");
}
}
@ -1811,7 +1811,7 @@ void GraphKit::replace_call(CallNode* call, Node* result) {
}
// Disconnect the call from the graph
call->disconnect_inputs(NULL);
call->disconnect_inputs(NULL, C);
C->gvn_replace_by(call, C->top());
// Clean up any MergeMems that feed other MergeMems since the