Mercurial > hg > graal-jvmci-8
diff src/share/vm/opto/loopTransform.cpp @ 7196:2aff40cb4703
7092905: C2: Keep track of the number of dead nodes
Summary: keep an (almost) accurate running count of the reachable (live) flow graph nodes.
Reviewed-by: kvn, twisti, jrose, vlivanov
author | bharadwaj |
---|---|
date | Tue, 27 Nov 2012 17:24:15 -0800 |
parents | d2582a08fa5d |
children | b30b3c2a0cf2 |
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--- a/src/share/vm/opto/loopTransform.cpp Tue Nov 27 12:48:52 2012 -0800 +++ b/src/share/vm/opto/loopTransform.cpp Tue Nov 27 17:24:15 2012 -0800 @@ -269,10 +269,10 @@ bool IdealLoopTree::policy_peeling( PhaseIdealLoop *phase ) const { Node *test = ((IdealLoopTree*)this)->tail(); int body_size = ((IdealLoopTree*)this)->_body.size(); - int uniq = phase->C->unique(); + int live_node_count = phase->C->live_nodes(); // Peeling does loop cloning which can result in O(N^2) node construction if( body_size > 255 /* Prevent overflow for large body_size */ - || (body_size * body_size + uniq > MaxNodeLimit) ) { + || (body_size * body_size + live_node_count > MaxNodeLimit) ) { return false; // too large to safely clone } while( test != _head ) { // Scan till run off top of loop @@ -601,7 +601,7 @@ return false; if (new_body_size > unroll_limit || // Unrolling can result in a large amount of node construction - new_body_size >= MaxNodeLimit - phase->C->unique()) { + new_body_size >= MaxNodeLimit - (uint) phase->C->live_nodes()) { return false; } @@ -2268,7 +2268,7 @@ // Skip next optimizations if running low on nodes. Note that // policy_unswitching and policy_maximally_unroll have this check. - uint nodes_left = MaxNodeLimit - phase->C->unique(); + uint nodes_left = MaxNodeLimit - (uint) phase->C->live_nodes(); if ((2 * _body.size()) > nodes_left) { return true; }