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TableGen: Explicitly forbid some nestings of class, multiclass, and foreach 

These previously all failed one way or another, but now we produce a more
helpful error message.

Change-Id: I8ffd2e87c8e35a5134c3be289e0a1fecaa2bb8ca

Differential revision: https://reviews.llvm.org/D44115

llvm-svn: 327497
This commit is contained in:
Nicolai Haehnle 2018-03-14 11:01:01 +00:00
parent aa9ca691cd
commit a511dddced
1 changed files with 10 additions and 2 deletions
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12
llvm/lib/TableGen/TGParser.cpp
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@ -3143,8 +3143,16 @@ bool TGParser::ParseObject(MultiClass *MC) {
if (MC)
return TokError("defset is not allowed inside multiclass");
return ParseDefset();
case tgtok::Class: return ParseClass();
case tgtok::MultiClass: return ParseMultiClass();
case tgtok::Class:
if (MC)
return TokError("class is not allowed inside multiclass");
if (!Loops.empty())
return TokError("class is not allowed inside foreach loop");
return ParseClass();
case tgtok::MultiClass:
if (!Loops.empty())
return TokError("multiclass is not allowed inside foreach loop");
return ParseMultiClass();
}
}