[llvm-commits] [llvm] r154951 - /llvm/trunk/utils/TableGen/AsmMatcherEmitter.cpp

[Jim Grosbach]

Author: grosbach
Date: Tue Apr 17 16:23:52 2012
New Revision: 154951

URL: http://llvm.org/viewvc/llvm-project?rev=154951&view=rev
Log:
Sanity check error handling for TokenAlias.

Modified:
    llvm/trunk/utils/TableGen/AsmMatcherEmitter.cpp

Modified: llvm/trunk/utils/TableGen/AsmMatcherEmitter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/TableGen/AsmMatcherEmitter.cpp?rev=154951&r1=154950&r2=154951&view=diff
==============================================================================
--- llvm/trunk/utils/TableGen/AsmMatcherEmitter.cpp (original)
+++ llvm/trunk/utils/TableGen/AsmMatcherEmitter.cpp Tue Apr 17 16:23:52 2012
@@ -1329,6 +1329,9 @@
     Record *Rec = AllTokenAliases[i];
     ClassInfo *FromClass = getTokenClass(Rec->getValueAsString("FromToken"));
     ClassInfo *ToClass = getTokenClass(Rec->getValueAsString("ToToken"));
+    if (FromClass == ToClass)
+      throw TGError(Rec->getLoc(),
+                    "error: Destination value identical to source value.");
     FromClass->SuperClasses.push_back(ToClass);
   }