# HG changeset patch
# User Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
# Date 1425131440 -3600
# Node ID d2e3d8202ed36eac50dca35ee118b5e4a96da9f0
# Parent  71a9b760d3bb4def8a759e71017b1c4484959bd1
Improve error message for partialEvaluationConstant assert to include the values of phis.

diff -r 71a9b760d3bb -r d2e3d8202ed3 graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/substitutions/TruffleGraphBuilderPlugins.java
--- a/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/substitutions/TruffleGraphBuilderPlugins.java	Sat Feb 28 13:15:09 2015 +0100
+++ b/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/substitutions/TruffleGraphBuilderPlugins.java	Sat Feb 28 14:50:40 2015 +0100
@@ -30,6 +30,7 @@
 import com.oracle.graal.compiler.common.*;
 import com.oracle.graal.compiler.common.calc.*;
 import com.oracle.graal.compiler.common.type.*;
+import com.oracle.graal.graph.*;
 import com.oracle.graal.java.*;
 import com.oracle.graal.java.GraphBuilderPlugin.InvocationPlugin;
 import com.oracle.graal.java.InvocationPlugins.Registration;
@@ -198,7 +199,18 @@
                 if (curValue.isConstant()) {
                     return true;
                 } else {
-                    throw builder.bailout("Partial evaluation did not reduce value to a constant, is a regular compiler node: " + curValue);
+                    StringBuilder sb = new StringBuilder();
+                    sb.append(curValue);
+                    if (curValue instanceof ValuePhiNode) {
+                        ValuePhiNode valuePhi = (ValuePhiNode) curValue;
+                        sb.append(" (");
+                        for (Node n : valuePhi.inputs()) {
+                            sb.append(n);
+                            sb.append("; ");
+                        }
+                        sb.append(")");
+                    }
+                    throw builder.bailout("Partial evaluation did not reduce value to a constant, is a regular compiler node: " + sb.toString());
                 }
             }
         });