[cfe-dev] Mistake in BuiltinOperatorOverloadBuilder::getUsualArithmeticConversions in SemaOverload.cpp

[Petr Kudryavtsev via cfe-dev]

Hello,

Looks like the static table for arithmetic conversions inside 
"getUsualArithmeticConversions" is out of date.

It is declared as 12x12 table but is initialized as 11x11 table. It 
seems that the Float128 type is not handled in it, but it should be.

For example, in method "addGenericBinaryArithmeticOverloads" we iterate 
over all promoted arithmetic types and Float128 is among them. It leads 
to access to not initialized elements of the table and also, since the 
Float128 type is 4th in method "getArithmeticType", all returned 
conversions for types with index more than or equal to 4 may be wrong.

Thanks,
Petr Kudriavtsev