[Bug middle-end/69045] New: missing optimization: forward constant propagation of regular expressions

[shawn at churchofgit dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69045

            Bug ID: 69045
           Summary: missing optimization: forward constant propagation of
                    regular expressions
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: shawn at churchofgit dot com
  Target Milestone: ---

C++11 regular expression support can be optimized with two levels of forward
constant propagation----regexp compilation, and regexp execution on constant
strings. This would be a feature that could be useful in other languages as
well. Would require RE2 or TRE to linked.