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changeset 6301:4535a87e8bf8

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Fix for sameSign check and javadoc
author Gilles Duboscq <duboscq@ssw.jku.at>
date Wed, 29 Aug 2012 13:05:43 +0200
parents 6a51bc216306
children 5d7d9a6953bd 2a819543cc45
files graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/type/IntegerStamp.java
diffstat 1 files changed, 6 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/type/IntegerStamp.java	Tue Aug 28 14:58:55 2012 +0200
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/type/IntegerStamp.java	Wed Aug 29 13:05:43 2012 +0200
@@ -200,8 +200,13 @@
         }
     }
 
+    /**
+     * Checks if the 2 stamps represent values of the same sign.
+     * Returns true if the two stamps are both positive of null or if they are both strictly negative
+     * @return true if the two stamps are both positive of null or if they are both strictly negative
+     */
     public static boolean sameSign(IntegerStamp s1, IntegerStamp s2) {
-        return s1.isPositive() && s2.isPositive() || s1.isNegative() && s2.isNegative();
+        return s1.isPositive() && s2.isPositive() || s1.isStrictlyNegative() && s2.isStrictlyNegative();
     }
 
 }