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

[olegendo at gcc dot gnu.org]

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

--- Comment #17 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Author: olegendo
Date: Mon Sep 28 14:00:44 2015
New Revision: 228202

URL: https://gcc.gnu.org/viewcvs?rev=228202&root=gcc&view=rev
Log:
gcc/
        PR target/54236
        * config/sh/predicates.md (t_reg_operand, negt_reg_operand): Allow
        and handle ne and eq codes.
        * config/sh/sh.c (sh_rtx_costs): Adjust matching of tst #imm,r0 insn.
        (sh_recog_treg_set_expr): Early accept negt_reg_operand.  Eearly reject
        CONST_INT_P.  Use reverse_condition.
        (sh_split_treg_set_expr): Likewise.

gcc/testsuite/
        PR target/54236
        * gcc.target/sh/pr54236-1.c (test_09, test_10, test_11): New.
        * gcc.target/sh/pr59533-1.c (test_23, test_24, test_25, test_26,
        test_27): New.
        * gcc.target/sh/pr54236-5.c: New.
        * gcc.target/sh/pr54236-6.c: New.

Added:
    trunk/gcc/testsuite/gcc.target/sh/pr54236-5.c
    trunk/gcc/testsuite/gcc.target/sh/pr54236-6.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/sh/predicates.md
    trunk/gcc/config/sh/sh.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/sh/pr54236-1.c
    trunk/gcc/testsuite/gcc.target/sh/pr59533-1.c