Add front-end support for 64bit X32 target.
fix Issue 7538 - All kinds of property functions should be called before getting their types inside typeof
do binary lookup for switches
optimize sequence of &&
Merge pull request #2124 from ibuclaw/x32arch

Add front-end support for 64bit X32 target.
Merge pull request #2123 from 9rnsr/fix7538

Issue 7538 - All kinds of property functions should be called before getting their types inside typeof
Merge pull request #2326 from WalterBright/andand-to-BT

optimize sequence of &&
Merge pull request #2320 from WalterBright/binary-switch

do binary lookup for switches