trivial optimization

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29770 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/AsmParser/llvmAsmParser.y b/lib/AsmParser/llvmAsmParser.y
index 6a8a0f40d888e1bc22b4470f4bc578e219325bec..7d6a9f7af36d55899eb721c5938d049787db52ef 100644 (file)
--- a/lib/AsmParser/llvmAsmParser.y
+++ b/lib/AsmParser/llvmAsmParser.y
@@ -714,7 +714,10 @@ static std::vector<UpRefRecord> UpRefs;
 /// thus we can complete the cycle.
 ///
 static PATypeHolder HandleUpRefs(const Type *ty) {
-  if (!ty->isAbstract()) return ty;
+  // If Ty isn't abstract, or if there are no up-references in it, then there is
+  // nothing to resolve here.
+  if (!ty->isAbstract() || UpRefs.empty()) return ty;
+  
   PATypeHolder Ty(ty);
   UR_OUT("Type '" << Ty->getDescription() <<
          "' newly formed.  Resolving upreferences.\n" <<