swift234

SILGen: Generate closure for FuncDecl once.
Associate the closure object for a local FuncDecl with the FuncDecl rather than with the DeclRefExpr. Move the closure creation code into SILGenFunction::visitFuncDecl, and add a LocalConstants map to SILGenFunction to store closures generated from local decls. Add a constructor to ConstantRefInst to allow it to be associated directly with ValueDecls in addition to DeclRefExprs.

Swift SVN r3368