diff options
| -rw-r--r-- | utils/TableGen/AsmMatcherEmitter.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/utils/TableGen/AsmMatcherEmitter.cpp b/utils/TableGen/AsmMatcherEmitter.cpp index 503d0730bb..dc92a6c218 100644 --- a/utils/TableGen/AsmMatcherEmitter.cpp +++ b/utils/TableGen/AsmMatcherEmitter.cpp @@ -1329,6 +1329,9 @@ void AsmMatcherInfo::BuildInfo() { 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); } |