[Bug target/61098] Poor code setting count register for large loops

[amodra at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61098

--- Comment #2 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Mon May 26 13:09:48 2014
New Revision: 210932

URL: http://gcc.gnu.org/viewcvs?rev=210932&root=gcc&view=rev
Log:
    PR target/61098
    * config/rs6000/rs6000.c (rs6000_emit_set_const): Remove unneeded
    params and return a bool.  Remove dead code.  Update comment.
    Assert we have a const_int source.  Remove bogus code from
    32-bit HWI days.  Move !TARGET_POWERPC64 handling, and correct
    handling of constants > 2G and reg_equal note, from..
    (rs6000_emit_set_long_const): ..here.  Remove unneeded param and
    return value.  Update comment.  If we can, use a new pseudo
    for intermediate calculations.
    * config/rs6000/rs6000-protos.h (rs6000_emit_set_const): Update
    prototype.
    * config/rs6000/rs6000.md (movsi_internal1_single+1): Update
    call to rs6000_emit_set_const in splitter.
    (movdi_internal64+2, +3): Likewise.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000-protos.h
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/config/rs6000/rs6000.md