[GR-36138] Copy cloned IndexedValueMap lazily on the next write.

PullRequest: graal/10718
oracle · Jan 24, 2022 · 839b4a6 · 839b4a6
2 parents 3a82385 + c28402c
commit 839b4a6
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Showing 7 changed files with 452 additions and 68 deletions.
diff --git a/compiler/src/org.graalvm.compiler.graph/src/org/graalvm/compiler/graph/NodeMap.java b/compiler/src/org.graalvm.compiler.graph/src/org/graalvm/compiler/graph/NodeMap.java
@@ -210,6 +210,14 @@ public void remove() {
                 assert NodeMap.this.values[current] != null;
                 NodeMap.this.values[current] = null;
             }
+
+            @SuppressWarnings("unchecked")
+            @Override
+            public T setValue(T newValue) {
+                T oldValue = (T) NodeMap.this.values[current];
+                NodeMap.this.values[current] = newValue;
+                return oldValue;
+            }
         };
     }