Mercurial > hg > graal-jvmci-8
diff src/share/vm/opto/node.hpp @ 23471:70649f10b88c
8129847: Compiling methods generated by Nashorn triggers high memory usage in C2
Summary: Add a new compiler phase, PhaseRenumberLive, that renumbers live nodes.
Reviewed-by: kvn, thartmann, vlivanov, shade
| author | zmajo |
|---|---|
| date | Tue, 15 Dec 2015 09:46:51 +0100 |
| parents | 9df0d8f65fea |
| children | 7c5babab479b |
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--- a/src/share/vm/opto/node.hpp Wed Dec 09 10:26:00 2015 -0800 +++ b/src/share/vm/opto/node.hpp Tue Dec 15 09:46:51 2015 +0100 @@ -294,10 +294,16 @@ public: // Each Node is assigned a unique small/dense number. This number is used - // to index into auxiliary arrays of data and bitvectors. - // It is declared const to defend against inadvertant assignment, - // since it is used by clients as a naked field. + // to index into auxiliary arrays of data and bit vectors. + // The field _idx is declared constant to defend against inadvertent assignments, + // since it is used by clients as a naked field. However, the field's value can be + // changed using the set_idx() method. + // + // The PhaseRenumberLive phase renumbers nodes based on liveness information. + // Therefore, it updates the value of the _idx field. The parse-time _idx is + // preserved in _parse_idx. const node_idx_t _idx; + DEBUG_ONLY(const node_idx_t _parse_idx;) // Get the (read-only) number of input edges uint req() const { return _cnt; }