From 9e1deb69b9defa45679f24518a028c66fc8c9577 Mon Sep 17 00:00:00 2001
From: Andrew Trick <atrick@apple.com>
Date: Wed, 3 Oct 2012 23:06:32 +0000
Subject: Added instregex support to TableGen subtarget emitter.

This allows the processor-specific machine model to override selected
base opcodes without any fanciness.
e.g. InstRW<[CoreXWriteVANDP], (instregex "VANDP")>.

llvm-svn: 165180
---
 llvm/utils/TableGen/SetTheory.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'llvm/utils/TableGen/SetTheory.cpp')

diff --git a/llvm/utils/TableGen/SetTheory.cpp b/llvm/utils/TableGen/SetTheory.cpp
index 46e6db173ea..bdca9a63bd2 100644
--- a/llvm/utils/TableGen/SetTheory.cpp
+++ b/llvm/utils/TableGen/SetTheory.cpp
@@ -294,7 +294,10 @@ const RecVec *SetTheory::expand(Record *Set) {
   // This is the first time we see Set. Find a suitable expander.
   try {
     const std::vector<Record*> &SC = Set->getSuperClasses();
-    for (unsigned i = 0, e = SC.size(); i != e; ++i)
+    for (unsigned i = 0, e = SC.size(); i != e; ++i) {
+      // Skip unnamed superclasses.
+      if (!dynamic_cast<const StringInit *>(SC[i]->getNameInit()))
+        continue;
       if (Expander *Exp = Expanders.lookup(SC[i]->getName())) {
         // This breaks recursive definitions.
         RecVec &EltVec = Expansions[Set];
@@ -303,6 +306,7 @@ const RecVec *SetTheory::expand(Record *Set) {
         EltVec.assign(Elts.begin(), Elts.end());
         return &EltVec;
       }
+    }
   } catch (const std::string &Error) {
     throw TGError(Set->getLoc(), Error);
   }
-- 
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