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diff graal/com.oracle.truffle.api.dsl/src/com/oracle/truffle/api/dsl/internal/SpecializationNode.java @ 21065:986f1c0d6f55

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Truffle-DSL: do not generate polymorphic nodes for nodes with all parameters evaluated in all execute methods.
author Christian Humer <christian.humer@oracle.com>
date Fri, 17 Apr 2015 16:18:17 +0200
parents 8dc73c226c63
children b1530a6cce8c
line wrap: on
line diff
--- a/graal/com.oracle.truffle.api.dsl/src/com/oracle/truffle/api/dsl/internal/SpecializationNode.java	Tue Apr 21 10:32:52 2015 +0200
+++ b/graal/com.oracle.truffle.api.dsl/src/com/oracle/truffle/api/dsl/internal/SpecializationNode.java	Fri Apr 17 16:18:17 2015 +0200
@@ -504,7 +504,15 @@
         if (merged == generated) {
             // new node
             if (start.count() == 2) {
-                insertAt(start, start.createPolymorphic(), "insert polymorphic");
+                SpecializationNode polymorphic = start.createPolymorphic();
+                /*
+                 * For nodes with all parameters evaluated in the execute method we do not need a
+                 * polymorphic node. the generated code returns null in createPolymorphic in this
+                 * case.
+                 */
+                if (polymorphic != null) {
+                    insertAt(start, polymorphic, "insert polymorphic");
+                }
             }
             SpecializationNode current = start;
             while (current != null && current.index < generated.index) {