[RS4GC] Fix base pair printing for constants.

Previously, "%" + name of the value was printed for each derived and base
pointer.  This is correct for instructions, but wrong for e.g. globals.

llvm-svn: 256305
diff --git a/llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-13.ll b/llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-13.ll
index 9c16eb2..65782c2 100644
--- a/llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-13.ll
+++ b/llvm/test/Transforms/RewriteStatepointsForGC/base-pointers-13.ll
@@ -1,6 +1,6 @@
 ; RUN: opt %s -rewrite-statepoints-for-gc -spp-print-base-pointers -S 2>&1 | FileCheck %s
 
-; CHECK: derived %derived base %global
+; CHECK: derived %derived base @global
 
 @global = external addrspace(1) global i8