Make valgrind happy with SparseSet.

R=ager@chromium.org
BUG=crbug.com/83626

Review URL: http://codereview.chromium.org/7111047

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8279 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 9564eb6507b261b7b68c8334796e0243a35a0faf..7ad556476ecb873cd3ee6d143111e0360d534618 100644 (file)
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -1286,7 +1286,12 @@ class SparseSet {
       : capacity_(capacity),
         length_(0),
         dense_(zone->NewArray<int>(capacity)),
-        sparse_(zone->NewArray<int>(capacity)) {}
+        sparse_(zone->NewArray<int>(capacity)) {
+#ifndef NVALGRIND
+    // Initialize the sparse array to make valgrind happy.
+    memset(sparse_, 0, sizeof(sparse_[0]) * capacity);
+#endif
+  }
 
   bool Contains(int n) const {
     ASSERT(0 <= n && n < capacity_);