# HG changeset patch
# User Christian Wimmer <christian.wimmer@oracle.com>
# Date 1363660726 25200
# Node ID 5fbb2df2b47fddc158ecbc0e6f8f53464482d30b
# Parent  29d44e82b8f797c7df157290926618ee5cee1e87
Allow lowering of UnwindNode and ExceptionObjectNode. The HotSpot code still uses the old LIR lowering.

diff -r 29d44e82b8f7 -r 5fbb2df2b47f graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotRuntime.java
--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotRuntime.java	Mon Mar 18 19:34:04 2013 -0700
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotRuntime.java	Mon Mar 18 19:38:46 2013 -0700
@@ -739,6 +739,8 @@
         } else if (n instanceof IntegerDivNode || n instanceof IntegerRemNode || n instanceof UnsignedDivNode || n instanceof UnsignedRemNode) {
             // Nothing to do for division nodes. The HotSpot signal handler catches divisions by
             // zero and the MIN_VALUE / -1 cases.
+        } else if (n instanceof UnwindNode || n instanceof ExceptionObjectNode) {
+            // Nothing to do, using direct LIR lowering for these nodes.
         } else {
             assert false : "Node implementing Lowerable not handled: " + n;
             throw GraalInternalError.shouldNotReachHere();
diff -r 29d44e82b8f7 -r 5fbb2df2b47f graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/UnwindNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/UnwindNode.java	Mon Mar 18 19:34:04 2013 -0700
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/UnwindNode.java	Mon Mar 18 19:38:46 2013 -0700
@@ -31,7 +31,7 @@
  * Unwind takes an exception object, destroys the current stack frame and passes the exception
  * object to the system's exception dispatch code.
  */
-public final class UnwindNode extends FixedNode implements LIRLowerable, Node.IterableNodeType {
+public final class UnwindNode extends FixedNode implements Lowerable, LIRLowerable, Node.IterableNodeType {
 
     @Input private ValueNode exception;
 
@@ -49,4 +49,9 @@
     public void generate(LIRGeneratorTool gen) {
         gen.emitUnwind(gen.operand(exception()));
     }
+
+    @Override
+    public void lower(LoweringTool tool) {
+        tool.getRuntime().lower(this, tool);
+    }
 }
diff -r 29d44e82b8f7 -r 5fbb2df2b47f graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/ExceptionObjectNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/ExceptionObjectNode.java	Mon Mar 18 19:34:04 2013 -0700
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/ExceptionObjectNode.java	Mon Mar 18 19:38:46 2013 -0700
@@ -32,7 +32,7 @@
  * The {@code ExceptionObject} instruction represents the incoming exception object to an exception
  * handler.
  */
-public class ExceptionObjectNode extends AbstractStateSplit implements StateSplit, LIRLowerable, MemoryCheckpoint {
+public class ExceptionObjectNode extends AbstractStateSplit implements StateSplit, Lowerable, LIRLowerable, MemoryCheckpoint {
 
     /**
      * Constructs a new ExceptionObject instruction.
@@ -52,6 +52,11 @@
     }
 
     @Override
+    public void lower(LoweringTool tool) {
+        tool.getRuntime().lower(this, tool);
+    }
+
+    @Override
     public boolean verify() {
         assertTrue(stateAfter() != null, "an exception handler needs a frame state");
         return super.verify();
diff -r 29d44e82b8f7 -r 5fbb2df2b47f graal/com.oracle.graal.snippets/src/com/oracle/graal/snippets/SnippetTemplate.java
--- a/graal/com.oracle.graal.snippets/src/com/oracle/graal/snippets/SnippetTemplate.java	Mon Mar 18 19:34:04 2013 -0700
+++ b/graal/com.oracle.graal.snippets/src/com/oracle/graal/snippets/SnippetTemplate.java	Mon Mar 18 19:38:46 2013 -0700
@@ -560,7 +560,7 @@
      * @param args the arguments to be bound to the flattened positional parameters of the snippet
      * @return the map of duplicated nodes (original -> duplicate)
      */
-    public Map<Node, Node> instantiate(MetaAccessProvider runtime, FixedWithNextNode replacee, UsageReplacer replacer, SnippetTemplate.Arguments args) {
+    public Map<Node, Node> instantiate(MetaAccessProvider runtime, FixedNode replacee, UsageReplacer replacer, SnippetTemplate.Arguments args) {
 
         // Inline the snippet nodes, replacing parameters with the given args in the process
         String name = snippet.name == null ? "{copy}" : snippet.name + "{copy}";
@@ -575,8 +575,12 @@
         // Re-wire the control flow graph around the replacee
         FixedNode firstCFGNodeDuplicate = (FixedNode) duplicates.get(firstCFGNode);
         replacee.replaceAtPredecessor(firstCFGNodeDuplicate);
-        FixedNode next = replacee.next();
-        replacee.setNext(null);
+        FixedNode next = null;
+        if (replacee instanceof FixedWithNextNode) {
+            FixedWithNextNode fwn = (FixedWithNextNode) replacee;
+            next = fwn.next();
+            fwn.setNext(null);
+        }
 
         if (replacee instanceof StateSplit) {
             for (StateSplit sideEffectNode : sideEffectNodes) {