[Statepoints] Export a magic constant into a header; NFC

llvm-svn: 263733
diff --git a/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp b/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
index 85aaf62..0ebc80f 100644
--- a/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
+++ b/llvm/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
@@ -1318,7 +1318,7 @@
   IRBuilder<> Builder(InsertBefore);
 
   ArrayRef<Value *> GCArgs(LiveVariables);
-  uint64_t StatepointID = 0xABCDEF00;
+  uint64_t StatepointID = StatepointDirectives::DefaultStatepointID;
   uint32_t NumPatchBytes = 0;
   uint32_t Flags = uint32_t(StatepointFlags::None);