[Bug target/51244] [SH] Inefficient conditional branch and code around T bit

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51244

--- Comment #82 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Author: olegendo
Date: Wed Dec 17 23:08:14 2014
New Revision: 218850

URL: https://gcc.gnu.org/viewcvs?rev=218850&root=gcc&view=rev
Log:
gcc/
    PR target/51244
    * config/sh/sh_treg_combine.cc (is_conditional_insn): New function.
    (cbranch_trace): Add member rtx* condition_rtx_in_insn, initialize it
    accordingly in constructor.
    (cbranch_trace::branch_condition_rtx_ref): New function.
    (cbranch_trace::branch_condition_rtx): Use branch_condition_rtx_ref.
    (sh_treg_combine::try_invert_branch_condition): Invert condition rtx
    in insn using reversed_comparison_code and validate_change instead of
    invert_jump_1.
    (sh_treg_combine::execute): Look for conditional insns in basic blocks
    in addition to conditional branches.
    * config/sh/sh.md (*movsicc_div0s): Remove combine patterns.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/sh/sh.md
    trunk/gcc/config/sh/sh_treg_combine.cc