Split out logic for valid clobbers and valid inline asm registers.

Fixes rdar://9281377


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134016 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGStmt.cpp b/lib/CodeGen/CGStmt.cpp
index f5bd56e..5d5ab2f 100644
--- a/lib/CodeGen/CGStmt.cpp
+++ b/lib/CodeGen/CGStmt.cpp
@@ -1558,6 +1558,7 @@
   for (unsigned i = 0, e = S.getNumClobbers(); i != e; i++) {
     llvm::StringRef Clobber = S.getClobber(i)->getString();
 
+    if (Clobber != "memory" && Clobber != "cc")
     Clobber = Target.getNormalizedGCCRegisterName(Clobber);
 
     if (i != 0 || NumConstraints != 0)