swift234

[SIL] Replace empty locations with valid locations in tuple exploding/encoding and pattern gen code.

Tuple exploding happens during RValue construction, so changed the constructor and addElement() method to take the location parameter. The imploding happens on RValue::forwardAsSingleValue and RValue::getAsSingleValue(). Make sure the right SIL locations are passed to all of these

Also, added some missing locations in pattern matching code.

Swift SVN r7916