Mercurial > hg > truffle

changeset 16177:ef1834ac566c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fold nodes with alwaysNull stamp into constant.
author Roland Schatz <roland.schatz@oracle.com>
date Tue, 24 Jun 2014 11:43:02 +0200
parents 5785eca138b0
children b96e17e6d6aa
files graal/com.oracle.graal.compiler.common/src/com/oracle/graal/compiler/common/type/ObjectStamp.java graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/type/NarrowOopStamp.java
diffstat 2 files changed, 19 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/graal/com.oracle.graal.compiler.common/src/com/oracle/graal/compiler/common/type/ObjectStamp.java	Mon Jun 23 18:04:15 2014 -0700
+++ b/graal/com.oracle.graal.compiler.common/src/com/oracle/graal/compiler/common/type/ObjectStamp.java	Tue Jun 24 11:43:02 2014 +0200
@@ -64,4 +64,13 @@
         }
         return false;
     }
+
+    @Override
+    public Constant asConstant() {
+        if (alwaysNull()) {
+            return Constant.NULL_OBJECT;
+        } else {
+            return null;
+        }
+    }
 }
--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/type/NarrowOopStamp.java	Mon Jun 23 18:04:15 2014 -0700
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/type/NarrowOopStamp.java	Tue Jun 24 11:43:02 2014 +0200
@@ -26,6 +26,7 @@
 import com.oracle.graal.compiler.common.spi.*;
 import com.oracle.graal.compiler.common.type.*;
 import com.oracle.graal.hotspot.HotSpotVMConfig.CompressEncoding;
+import com.oracle.graal.hotspot.meta.*;
 
 public class NarrowOopStamp extends AbstractObjectStamp {
 
@@ -100,4 +101,13 @@
         }
         return super.equals(other);
     }
+
+    @Override
+    public Constant asConstant() {
+        if (alwaysNull()) {
+            return HotSpotCompressedNullConstant.COMPRESSED_NULL;
+        } else {
+            return null;
+        }
+    }
 }