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changeset 10649:ac8b195fd3aa

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New unsafe cast CompilerDirectives method in Truffle API.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sun, 07 Jul 2013 23:51:52 +0200
parents 8660a090c3e2
children b6e46324233f
files graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/nodes/UnsafeCastMacroNode.java graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/substitutions/CompilerDirectivesSubstitutions.java graal/com.oracle.truffle.api/src/com/oracle/truffle/api/CompilerDirectives.java
diffstat 3 files changed, 19 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/nodes/UnsafeCastMacroNode.java	Sun Jul 07 23:32:05 2013 +0200
+++ b/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/nodes/UnsafeCastMacroNode.java	Sun Jul 07 23:51:52 2013 +0200
@@ -41,7 +41,10 @@
             Class c = (Class) arguments.get(1).asConstant().asObject();
             ResolvedJavaType lookupJavaType = tool.runtime().lookupJavaType(c);
             Stamp s = StampFactory.declaredNonNull(lookupJavaType);
-            return graph().unique(new UnsafeCastNode(arguments.get(0), s));
+            ValueAnchorNode valueAnchorNode = graph().add(new ValueAnchorNode());
+            UnsafeCastNode unsafeCast = graph().unique(new UnsafeCastNode(arguments.get(0), s, (GuardingNode) valueAnchorNode));
+            this.replaceAtUsages(unsafeCast);
+            return valueAnchorNode;
         }
         return this;
     }
--- a/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/substitutions/CompilerDirectivesSubstitutions.java	Sun Jul 07 23:32:05 2013 +0200
+++ b/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/substitutions/CompilerDirectivesSubstitutions.java	Sun Jul 07 23:51:52 2013 +0200
@@ -57,4 +57,7 @@
 
     @MacroSubstitution(macro = BailoutNode.class, isStatic = true)
     public static native void bailout(String reason);
+
+    @MacroSubstitution(macro = UnsafeCastMacroNode.class, isStatic = true)
+    public static native Object unsafeCast(Object value, Class clazz);
 }
--- a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/CompilerDirectives.java	Sun Jul 07 23:32:05 2013 +0200
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/CompilerDirectives.java	Sun Jul 07 23:51:52 2013 +0200
@@ -126,4 +126,16 @@
     @Target({ElementType.METHOD})
     public @interface Unsafe {
     }
+
+    /**
+     * Treats the given value as a value of the given class. The class must evaluate to a constant.
+     * 
+     * @param value the value that is known to have the specified type
+     * @param clazz the specified type of the value
+     * @return the value
+     */
+    @Unsafe
+    public static Object unsafeCast(Object value, Class clazz) {
+        return value;
+    }
 }