TableGen: AsmMatcher diagnostic when missing instruction mnemonic.
Previously, if an instruction definition was missing the mnemonic,
the next line would just assert(). Issue a real diagnostic instead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156263 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/AsmMatcherEmitter.cpp b/utils/TableGen/AsmMatcherEmitter.cpp
index 0cb86d0..96e882b 100644
--- a/utils/TableGen/AsmMatcherEmitter.cpp
+++ b/utils/TableGen/AsmMatcherEmitter.cpp
@@ -825,6 +825,9 @@
throw TGError(TheDef->getLoc(),
"Instruction '" + TheDef->getName() + "' has no tokens");
Mnemonic = AsmOperands[0].Token;
+ if (Mnemonic.empty())
+ throw TGError(TheDef->getLoc(),
+ "Missing instruction mnemonic");
// FIXME : Check and raise an error if it is a register.
if (Mnemonic[0] == '$')
throw TGError(TheDef->getLoc(),