compiler.cfg.gvn.tests: fix the old, single-basic-block tests from compiler.cfg.value-numbering (which was nearly all of them) to work with new gvn interface
compiler.cfg.gvn.tests: fix the old, single-basic-block tests from
compiler.cfg.value-numbering (which was nearly all of them) to work with
new gvn interface

mcandre/factor,mcandre/factor,mcandre/factor,mcandre/factor,mcandre/factor,mcandre/factor,mcandre/factor