Mercurial > hg > truffle

changeset 15379:d8b36589cab0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Guards which are guarenteed to succeed can replace themselves with null.
author Gilles Duboscq <duboscq@ssw.jku.at>
date Fri, 25 Apr 2014 10:33:17 +0200
parents dea98caac669
children 10c6705dbe9a
files graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/GuardNode.java graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/GuardedValueNode.java
diffstat 2 files changed, 3 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/GuardNode.java	Thu Apr 24 17:18:24 2014 +0200
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/GuardNode.java	Fri Apr 25 10:33:17 2014 +0200
@@ -107,7 +107,8 @@
         } else if (condition() instanceof LogicConstantNode) {
             LogicConstantNode c = (LogicConstantNode) condition();
             if (c.getValue() != negated) {
-                return graph().start();
+                this.replaceAtUsages(null);
+                return null;
             }
         }
         return this;
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/GuardedValueNode.java	Thu Apr 24 17:18:24 2014 +0200
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/GuardedValueNode.java	Fri Apr 25 10:33:17 2014 +0200
@@ -77,7 +77,7 @@
 
     @Override
     public Node canonical(CanonicalizerTool tool) {
-        if (getGuard() == graph().start() || getGuard() == null) {
+        if (getGuard() == null) {
             if (stamp().equals(object().stamp())) {
                 return object();
             } else {