string.c: constify

* string.c (tr_find): constify argument table.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43699 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
hash.c: static internal functions

* hash.c (NOINSERT_UPDATE_CALLBACK): make both of noinsert and insert
  internal functions static.  and put semicolons for etags to find the
  following functions properly.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43700 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
compile.c: tailcall on super

* compile.c (iseq_peephole_optimize): enable tail call optimization on
  super too.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43701 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
vm_core.h: extract VM_STACK_OVERFLOWED_P

* vm_core.h (VM_STACK_OVERFLOWED_P, WHEN_VM_STACK_OVERFLOWED): extract
  condition from CHECK_VM_STACK_OVERFLOW.

* vm_exec.c (vm_stack_overflow_for_insn): move rb_bug call.

* vm_exec.h (CHECK_VM_STACK_OVERFLOW_FOR_INSN): share the condition
  with CHECK_VM_STACK_OVERFLOW.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43702 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2013-11-18

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43703 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
configure.in: -Werror=division-by-zero

* configure.in (warnflags): make division-by-zero error for
  RUBY_CONST_ASSERT macro.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43704 b2dd03c8-39d4-4d8f-98ff-823fe69b080e