I was looking for "official" (documented to work and intended to stay working)
helper functions to use in peephole2 patterns, for checking whether e.g. a
specific hard register was free to use. It appears there are some such
functions obviously intended for that use and used in various ports, but they
aren't documented, for example peep2_next_insn, peep2_regno_dead_p and
peep2_reg_dead_p.
I expected them to be mentioned along the documentation for define_peephole2,
or at least cross-referenced from there. But, no grep hits at all in doc for
peep2_!
--
Summary: peephole2 helper functions not documented.
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: hp at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37994
