merge revision(s) 52928: [Backport #11784]
* insns.def (opt_case_dispatch): check Float#=== redefinition * test/ruby/test_optimization.rb (test_opt_case_dispatch): new [ruby-core:71920] [Bug #11784]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@53145 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 52928: [Backport #11784]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@53145 b2dd03c8-39d4-4d8f-98ff-823fe69b080e