commit 67cd20d0396a68e61858736b7943dd352f1b0d0b
author Jim Grosbach <grosbach@apple.com> Tue Apr 17 21:23:52 2012 +0000
committer Jim Grosbach <grosbach@apple.com> Tue Apr 17 21:23:52 2012 +0000
tree 1326876300c04ac1b33fa01a74d7f62dfabc3fb2
parent ab427334f54fed51ed721672a6d0fd1ca0802dd4

Sanity check error handling for TokenAlias.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154951 91177308-0d34-0410-b5e6-96231b3b80d8

utils/TableGen/AsmMatcherEmitter.cpp

diff --git a/utils/TableGen/AsmMatcherEmitter.cpp b/utils/TableGen/AsmMatcherEmitter.cpp
index 503d073..dc92a6c 100644
--- a/utils/TableGen/AsmMatcherEmitter.cpp
+++ b/utils/TableGen/AsmMatcherEmitter.cpp
@@ -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);
   }