* Makefile.in (gcse.o): Now includes ggc.h.
* gcse.c: Include ggc.h.
(want_to_gcse_p): Verify expression can be in SET as valid insn.
(try_replace_reg): Remove warning of uninitialize variable.
(process_insert_insn): Call invalid_insn_p to validate insn.
* recog.c (insn_invalid_p): Now global.
See if can make valid by adding CLOBBERs of SCRATCH only and do if so.
* recog.h (insn_invalid_p): New declaration.
From-SVN: r39857
