greatly reduce hte default size of stringmap.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35632 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/StringMap.cpp b/lib/Support/StringMap.cpp
index 95ff2bb..a84cd9d 100644
--- a/lib/Support/StringMap.cpp
+++ b/lib/Support/StringMap.cpp
@@ -18,7 +18,7 @@
 StringMapImpl::StringMapImpl(unsigned InitSize, unsigned itemSize) {
   assert((InitSize & (InitSize-1)) == 0 &&
          "Init Size must be a power of 2 or zero!");
-  NumBuckets = InitSize ? InitSize : 512;
+  NumBuckets = InitSize ? InitSize : 16;
   ItemSize = itemSize;
   NumItems = 0;
   NumTombstones = 0;