[Bug target/54236] [SH] Improve addc and subc insn utilization

[olegendo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54236

--- Comment #4 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Author: olegendo
Date: Tue Oct 29 20:45:56 2013
New Revision: 204180

URL: http://gcc.gnu.org/viewcvs?rev=204180&root=gcc&view=rev
Log:
    PR target/54236
    * config/sh/sh.md (*addc): Rename existing variations to ...
    (*addc_r_r_1, *addc_2r_1, *addc_r_1): ... these.
    (*addc_r_lsb, *addc_r_r_lsb, *addc_r_lsb_r, *addc_2r_lsb, *addc_r_msb,
    *addc_r_r_msb, *addc_2r_msb): New insn_and_split patterns.
    * config/sh/sh.c (addsubcosts): Handle some addc special cases.

    PR target/54236
    * gcc.target/sh/pr54236-2: New.
    * gcc.target/sh/pr54089-6: Add another rotl special case.


Added:
    trunk/gcc/testsuite/gcc.target/sh/pr54236-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/sh/sh.c
    trunk/gcc/config/sh/sh.md
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/sh/pr54089-6.c