[Bug target/49903] [avr] Redundant comparisons in binary-search switch/case expansion

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49903

--- Comment #6 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-08-14 
09:10:20 UTC ---
Author: gjl
Date: Sun Aug 14 09:10:13 2011
New Revision: 177744

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=177744
Log:

    * PR target/49903
    * config/avr/avr.md (UNSPEC_IDENTITY): New c_enum.
    (branch_unspec): New insn.
    (branch): Beauty farm.
    * config/avr/avr.c (compare_condition): Use JUMP_P.  Test SET_SRC
    to be IF_THEN_ELSE.
    (avr_compare_pattern, avr_reorg_remove_redundant_compare):
    New static functions.
    (avr_reorg): Use them.  Use next_real_insn instead of NEXT_INSN.
    Use CONST_INT_P.  Beauty.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/avr/avr.c
    trunk/gcc/config/avr/avr.md