Mangle param names with .arg. only.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66343 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGDecl.cpp b/lib/CodeGen/CGDecl.cpp
index abb1337..6646365 100644
--- a/lib/CodeGen/CGDecl.cpp
+++ b/lib/CodeGen/CGDecl.cpp
@@ -426,7 +426,7 @@
     // Targets that don't have stack use global address space for parameters.
     // Specify external linkage for such globals so that llvm optimizer do
     // not assume there values initialized as zero.
-    DeclPtr = CreateStaticBlockVarDecl(D, ".auto.",
+    DeclPtr = CreateStaticBlockVarDecl(D, ".arg.",
                                        llvm::GlobalValue::ExternalLinkage);
   } else {
     // A fixed sized single-value variable becomes an alloca in the entry block.