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[mlir][ods] NFC fix tblgen crash with empty assembly format

This commit is contained in:
Mogball 2022-02-08 21:13:58 +00:00
parent d379ec9908
commit 72619d101f
1 changed files with 2 additions and 0 deletions
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2
mlir/tools/mlir-tblgen/AttrOrTypeFormatGen.cpp
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@ -812,6 +812,8 @@ LogicalResult DefFormatParser::verify(SMLoc loc,
it.value().getName()); it.value().getName());
} }
} }
if (elements.empty())
return success();
// A `struct` directive that contains optional parameters cannot be followed // A `struct` directive that contains optional parameters cannot be followed
// by a comma literal, which is ambiguous. // by a comma literal, which is ambiguous.
for (auto it : llvm::zip(elements.drop_back(), elements.drop_front())) { for (auto it : llvm::zip(elements.drop_back(), elements.drop_front())) {