# HG changeset patch
# User Gilles Duboscq <duboscq@ssw.jku.at>
# Date 1386858684 -3600
# Node ID 10f943c778f651c715ecc29b464c611b888dc96c
# Parent  5a9afbf72714b3eee1b69626653752351fd49e93
Add code to trace uncollected speculations

diff -r 5a9afbf72714 -r 10f943c778f6 src/share/vm/graal/graalGlobals.hpp
--- a/src/share/vm/graal/graalGlobals.hpp	Thu Dec 12 15:13:02 2013 +0100
+++ b/src/share/vm/graal/graalGlobals.hpp	Thu Dec 12 15:31:24 2013 +0100
@@ -76,6 +76,9 @@
   notproduct(bool, GraalPrintSimpleStubs, false,                            \
           "Print simple Graal stubs")                                       \
                                                                             \
+  develop(bool, TraceUncollectedSpeculations, false,                        \
+          "Print message when a failed speculation was not collected")      \
+                                                                            \
 
 
 // Read default values for Graal globals
diff -r 5a9afbf72714 -r 10f943c778f6 src/share/vm/runtime/deoptimization.cpp
--- a/src/share/vm/runtime/deoptimization.cpp	Thu Dec 12 15:13:02 2013 +0100
+++ b/src/share/vm/runtime/deoptimization.cpp	Thu Dec 12 15:31:24 2013 +0100
@@ -1373,6 +1373,11 @@
     if (speculation != NULL) {
       oop speculation_log = nm->speculation_log();
       if (speculation_log != NULL) {
+        if (TraceUncollectedSpeculations) {
+          if (SpeculationLog::lastFailed(speculation_log) != NULL) {
+            tty->print_cr("A speculation that was not collected by the compiler is being overwritten");
+          }
+        }
         SpeculationLog::set_lastFailed(speculation_log, speculation);
       }
       thread->set_pending_failed_speculation(NULL);