s/compiler_used/compiler.used/.

We were incorrectly using compiler_used instead of compiler.used. Unfortunately
the passes using the broken name had tests also using the broken name.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186705 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/IR/Verifier.cpp b/lib/IR/Verifier.cpp
index 6a7f45f..1d495b7 100644
--- a/lib/IR/Verifier.cpp
+++ b/lib/IR/Verifier.cpp
@@ -460,7 +460,7 @@
   }
 
   if (GV.hasName() && (GV.getName() == "llvm.used" ||
-                       GV.getName() == "llvm.compiler_used")) {
+                       GV.getName() == "llvm.compiler.used")) {
     Assert1(!GV.hasInitializer() || GV.hasAppendingLinkage(),
             "invalid linkage for intrinsic global variable", &GV);
     Type *GVType = GV.getType()->getElementType();