# HG changeset patch
# User Josef Eisl <josef.eisl@jku.at>
# Date 1422525367 -3600
# Node ID 9a3bde73e05a2fb8de1de3fc7edf86e7d1aae0bb
# Parent  94ca6ce786ee2d90983667ed78b688dbd13bf1fa
StackSlotAllocation: add metric for uninitialized stack slots.

diff -r 94ca6ce786ee -r 9a3bde73e05a graal/com.oracle.graal.lir/src/com/oracle/graal/lir/stackslotalloc/LSStackSlotAllocator.java
--- a/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/stackslotalloc/LSStackSlotAllocator.java	Thu Jan 29 10:38:01 2015 +0100
+++ b/graal/com.oracle.graal.lir/src/com/oracle/graal/lir/stackslotalloc/LSStackSlotAllocator.java	Thu Jan 29 10:56:07 2015 +0100
@@ -58,6 +58,11 @@
         // @formatter:on
     }
 
+    /**
+     * The number of allocated stack slots.
+     */
+    static final DebugMetric uninitializedSlots = Debug.metric("StackSlotAllocator[uninitializedSlots]");
+
     public void allocateStackSlots(FrameMapBuilderTool builder, LIRGenerationResult res) {
         new Allocator(res.getLIR(), builder).allocate();
     }
@@ -287,6 +292,9 @@
                     if (flags.contains(OperandFlag.UNINITIALIZED)) {
                         // Stack slot is marked uninitialized so we have to assume it is live all
                         // the time.
+                        if (Debug.isMeterEnabled() && !(interval.from() == 0 && interval.to() == maxOpId())) {
+                            uninitializedSlots.increment();
+                        }
                         interval.addDef(0);
                         interval.addUse(maxOpId());
                     } else {