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+2000-03-28  Stefan Monnier  <monnier@cs.yale.edu>
+
+        * regex.c (analyse_first): New function obtained by ripping out most
+        of re_compile_fastmap and generalizing it a little bit so that it
+        can also just return whether a given (sub)pattern can match the empty
+        string or not.
+        (regex_compile): Use `analyse_first' to decide whether the loop-check
+        needs to be done or not for *, +, *? and +? (the loop check is costly
+        for non-greedy repetition).
+        (re_compile_fastmap): Delegate the actual work to `analyse_first'.
+
 2000-03-28  Dave Love  <fx@gnu.org>
 
         * s/gnu-linux.h (GC_SETJMP_WORKS): Define for i386, sparc, m68k,