Update LLVM for rebase to r212749.

Includes a cherry-pick of:
r212948 - fixes a small issue with atomic calls

Change-Id: Ib97bd980b59f18142a69506400911a6009d9df18

1 files changed, 2 insertions, 8 deletions

diff --git a/lib/TableGen/Record.cpp b/lib/TableGen/Record.cpp
index c553a21..f7843dc 100644
--- a/lib/TableGen/Record.cpp
+++ b/lib/TableGen/Record.cpp
@@ -811,20 +811,14 @@ Init *UnOpInit::Fold(Record *CurRec, MultiClass *CurMultiClass) const {
   }
   case HEAD: {
     if (ListInit *LHSl = dyn_cast<ListInit>(LHS)) {
-      if (LHSl->getSize() == 0) {
-        assert(0 && "Empty list in car");
-        return nullptr;
-      }
+      assert(LHSl->getSize() != 0 && "Empty list in car");
       return LHSl->getElement(0);
     }
     break;
   }
   case TAIL: {
     if (ListInit *LHSl = dyn_cast<ListInit>(LHS)) {
-      if (LHSl->getSize() == 0) {
-        assert(0 && "Empty list in cdr");
-        return nullptr;
-      }
+      assert(LHSl->getSize() != 0 && "Empty list in cdr");
       // Note the +1.  We can't just pass the result of getValues()
       // directly.
       ArrayRef<Init *>::iterator begin = LHSl->getValues().begin()+1;