# HG changeset patch
# User Gilles Duboscq <duboscq@ssw.jku.at>
# Date 1342697296 -7200
# Node ID 0428e0b46c6327a3ad630fb8ef7445a74cc0e5df
# Parent  32a7714ac0c56e70562c45c59aca7466107970e7
Use HashSet in FloatingReadPhase instead of IdentityHashMap since Nodes use identity .equals and .hashCode

diff -r 32a7714ac0c5 -r 0428e0b46c63 graal/com.oracle.graal.compiler/src/com/oracle/graal/compiler/phases/FloatingReadPhase.java
--- a/graal/com.oracle.graal.compiler/src/com/oracle/graal/compiler/phases/FloatingReadPhase.java	Thu Jul 19 00:56:40 2012 +0200
+++ b/graal/com.oracle.graal.compiler/src/com/oracle/graal/compiler/phases/FloatingReadPhase.java	Thu Jul 19 13:28:16 2012 +0200
@@ -91,19 +91,19 @@
                 }
             }
 
-            IdentityHashMap<Object, Object> keys = new IdentityHashMap<>();
+            Set<Object> keys = new HashSet<>();
             for (Object key : lastMemorySnapshot.keySet()) {
-                keys.put(key, key);
+                keys.add(key);
             }
             for (MemoryMap other : withStates) {
                 assert other.loops.size() == loops.size();
                 assert other.loops.size() < 1 || other.loops.peek().loopBegin == loops.peek().loopBegin;
                 for (Object key : other.lastMemorySnapshot.keySet()) {
-                    keys.put(key, key);
+                    keys.add(key);
                 }
             }
 
-            for (Object key : keys.keySet()) {
+            for (Object key : keys) {
                 ValueNode merged = lastMemorySnapshot.get(key);
                 if (merged == null) {
                     merged = lastMemorySnapshot.get(LocationNode.ANY_LOCATION);