gcc/contrib/reghunt/date_based

This directory contains scripts that are used for identifying the
patch that introduced a regression.  General information about such
searches is covered in http://gcc.gnu.org/bugs/reghunt.html.

  reg_search searches for a small time interval within a range of
  dates in which results for a test changed, using a binary search.
  The functionality for getting sources, building the component to
  test, and running the test are in other scripts that are run from
  here.

  reg_periodic invokes separate tools (the same scripts invoked by
  reg_search) over a range of dates at specified intervals.

  reg_test_template shows the format for the script that runs a test
  and determines whether to continue the search with a later or
  earlier date.