[Bug tree-optimization/43721] Failure to optimise (a/b) and (a%b) into single __aeabi_idivmod call

prathamesh3492 at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Fri Oct 28 19:07:00 GMT 2016


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43721

--- Comment #9 from prathamesh3492 at gcc dot gnu.org ---
Author: prathamesh3492
Date: Fri Oct 28 19:05:12 2016
New Revision: 241660

URL: https://gcc.gnu.org/viewcvs?rev=241660&root=gcc&view=rev
Log:
2016-10-28  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>
            Kugan Vivekanandarajah  <kuganv@linaro.org>
            Jim Wilson  <jim.wilson@linaro.org>

        PR tree-optimization/43721
        * target.def: New hook expand_divmod_libfunc.
        * doc/tm.texi.in: Add hook for TARGET_EXPAND_DIVMOD_LIBFUNC
        * doc/tm.texi: Regenerate.
        * internal-fn.def: Add new entry for DIVMOD ifn.
        * internal-fn.c (expand_DIVMOD): New.
        * tree-ssa-math-opts.c: Include optabs-libfuncs.h, tree-eh.h,
        targhooks.h.
        (widen_mul_stats): Add new field divmod_calls_inserted.
        (target_supports_divmod_p): New.
        (divmod_candidate_p): Likewise.
        (convert_to_divmod): Likewise.
        (pass_optimize_widening_mul::execute): Call
        calculate_dominance_info(), renumber_gimple_stmt_uids() at
        beginning of function. Call convert_to_divmod()
        and record stats for divmod.
        * config/arm/arm.c (arm_expand_divmod_libfunc): Override hook
        TARGET_EXPAND_DIVMOD_LIBFUNC.
        * doc/sourcebuild.texi: Add items for arm_divmod_simode, divmod,
        divmod_simode.

testsuite/
        * lib/target-supports.exp (check_effective_target_divmod): New.
        (check_effective_target_divmod_simode): Likewise.
        (check_effective_target_arm_divmod_simode): Likewise.
        * gcc.dg/divmod-1-simode.c: New test.
        * gcc.dg/divmod-1.c: Likewise.
        * gcc.dg/divmod-2-simode.c: Likewise.
        * gcc.dg/divmod-2.c: Likewise.
        * gcc.dg/divmod-3-simode.c: Likewise.
        * gcc.dg/divmod-3.c: Likewise.
        * gcc.dg/divmod-4-simode.c: Likewise.
        * gcc.dg/divmod-4.c: Likewise.
        * gcc.dg/divmod-5.c: Likewise.
        * gcc.dg/divmod-6-simode.c: Likewise.
        * gcc.dg/divmod-6.c: Likewise.
        * gcc.dg/divmod-7.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/divmod-1-simode.c
    trunk/gcc/testsuite/gcc.dg/divmod-1.c
    trunk/gcc/testsuite/gcc.dg/divmod-2-simode.c
    trunk/gcc/testsuite/gcc.dg/divmod-2.c
    trunk/gcc/testsuite/gcc.dg/divmod-3-simode.c
    trunk/gcc/testsuite/gcc.dg/divmod-3.c
    trunk/gcc/testsuite/gcc.dg/divmod-4-simode.c
    trunk/gcc/testsuite/gcc.dg/divmod-4.c
    trunk/gcc/testsuite/gcc.dg/divmod-5.c
    trunk/gcc/testsuite/gcc.dg/divmod-6-simode.c
    trunk/gcc/testsuite/gcc.dg/divmod-6.c
    trunk/gcc/testsuite/gcc.dg/divmod-7.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/arm/arm.c
    trunk/gcc/doc/sourcebuild.texi
    trunk/gcc/doc/tm.texi
    trunk/gcc/doc/tm.texi.in
    trunk/gcc/internal-fn.c
    trunk/gcc/internal-fn.def
    trunk/gcc/target.def
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/lib/target-supports.exp
    trunk/gcc/tree-ssa-math-opts.c


More information about the Gcc-bugs mailing list