[Bug target/54089] [SH] Refactor shift patterns

[olegendo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54089

--- Comment #16 from Oleg Endo <olegendo at gcc dot gnu.org> 2012-09-10 
20:35:30 UTC ---
Author: olegendo
Date: Mon Sep 10 20:35:25 2012
New Revision: 191161

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191161
Log:
    PR target/54089
    * config/sh/sh.h (SH_DYNAMIC_SHIFT_COST): Set always to 1 if
    dynamic shifts are available.
    (SHIFT_COUNT_TRUNCATED): Always define to 0.  Correct comment.
    * config/sh/sh.c (ashl_lshr_seq, ext_ashl_lshr_seq): Add comments.
    * config/sh/predicates.md (shift_count_operand): Allow
    arith_reg_operand even if TARGET_DYNSHIFT is false.
    * config/sh/sh.md (ashlsi3, lshrsi3): Expand library call patterns
    if needed.
    (ashlsi3_d_call, lshrsi3_d_call): New insns.

    PR target/54089
    * config/sh/lib1funcs.S (ashlsi3): Reimplement as ashlsi3_r0.
    (lshrsi3): Reimplement as lshrsi3_r0.

    PR target/54089
    * gcc.target/sh/pr54089-3.c: New.


Added:
    trunk/gcc/testsuite/gcc.target/sh/pr54089-3.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/sh/predicates.md
    trunk/gcc/config/sh/sh.c
    trunk/gcc/config/sh/sh.h
    trunk/gcc/config/sh/sh.md
    trunk/gcc/testsuite/ChangeLog
    trunk/libgcc/ChangeLog
    trunk/libgcc/config/sh/lib1funcs.S