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Add a better error message when failing to assign one tablegen value to another

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This is currently for assigning from one bit init to another.  It can easily be extended to other types.

Test to follow soon in another patch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214374 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Pete Cooper
2014-07-31 01:43:57 +00:00
parent b4d70a0c2a
commit b71c54fb7d
1 changed files with 8 additions and 1 deletions
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9
lib/TableGen/TGParser.cpp
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@ -135,11 +135,18 @@ bool TGParser::SetValue(Record *CurRec, SMLoc Loc, Init *ValName,
V = BitsInit::get(NewBits);
}
if (RV->setValue(V))
if (RV->setValue(V)) {
std::string InitType = "";
if (BitsInit *BI = dyn_cast<BitsInit>(V)) {
InitType = (Twine("' of type bit initializer with length ") +
Twine(BI->getNumBits())).str();
}
return Error(Loc, "Value '" + ValName->getAsUnquotedString() + "' of type '"
+ RV->getType()->getAsString() +
"' is incompatible with initializer '" + V->getAsString()
+ InitType
+ "'");
}
return false;
}