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changeset 15144:76695509b2fd

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Avoid precessing unused phis during peeling
author Gilles Duboscq <duboscq@ssw.jku.at>
date Mon, 14 Apr 2014 15:16:59 +0200
parents c68064651847
children df2ef5204f2b
files graal/com.oracle.graal.loop/src/com/oracle/graal/loop/LoopFragmentInside.java
diffstat 1 files changed, 6 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/graal/com.oracle.graal.loop/src/com/oracle/graal/loop/LoopFragmentInside.java	Mon Apr 14 15:13:17 2014 +0200
+++ b/graal/com.oracle.graal.loop/src/com/oracle/graal/loop/LoopFragmentInside.java	Mon Apr 14 15:16:59 2014 +0200
@@ -184,6 +184,9 @@
         StructuredGraph graph = loopBegin.graph();
         List<PhiNode> newPhis = new LinkedList<>();
         for (PhiNode phi : loopBegin.phis().snapshot()) {
+            if (phi.usages().isEmpty()) {
+                continue;
+            }
             ValueNode first;
             if (loopBegin.loopEnds().count() == 1) {
                 ValueNode b = phi.valueAt(loopBegin.loopEnds().first()); // back edge value
@@ -284,6 +287,9 @@
             }
 
             for (final PhiNode phi : loopBegin.phis().snapshot()) {
+                if (phi.usages().isEmpty()) {
+                    continue;
+                }
                 final PhiNode firstPhi = patchPhi(graph, phi, newExitMerge);
                 for (AbstractEndNode end : newExitMerge.forwardEnds()) {
                     LoopEndNode loopEnd = reverseEnds.get(end);