[Bug target/103269] Enable ZMM in MOVE_MAX and STORE_MAX_PIECES without -mprefer-vector-width=512

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103269

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by H.J. Lu <h...@gcc.gnu.org>:

https://gcc.gnu.org/g:654cd743c88a28fb292f7c2cf5f4b10e4047e7d9

commit r12-5777-g654cd743c88a28fb292f7c2cf5f4b10e4047e7d9
Author: H.J. Lu <hjl.to...@gmail.com>
Date:   Mon Nov 15 18:52:56 2021 -0800

    x86: Add -mmove-max=bits and -mstore-max=bits

    Add -mmove-max=bits and -mstore-max=bits to enable 256-bit/512-bit move
    and store, independent of -mprefer-vector-width=bits:

    1. Add X86_TUNE_AVX512_MOVE_BY_PIECES and X86_TUNE_AVX512_STORE_BY_PIECES
    which are enabled for Intel Sapphire Rapids processor.
    2. Add -mmove-max=bits to set the maximum number of bits can be moved from
    memory to memory efficiently.  The default value is derived from
    X86_TUNE_AVX512_MOVE_BY_PIECES, X86_TUNE_AVX256_MOVE_BY_PIECES, and the
    preferred vector width.
    3. Add -mstore-max=bits to set the maximum number of bits can be stored to
    memory efficiently.  The default value is derived from
    X86_TUNE_AVX512_STORE_BY_PIECES, X86_TUNE_AVX256_STORE_BY_PIECES and the
    preferred vector width.

    gcc/

            PR target/103269
            * config/i386/i386-expand.c (ix86_expand_builtin): Pass PVW_NONE
            and PVW_NONE to ix86_target_string.
            * config/i386/i386-options.c (ix86_target_string): Add arguments
            for move_max and store_max.
            (ix86_target_string::add_vector_width): New lambda.
            (ix86_debug_options): Pass ix86_move_max and ix86_store_max to
            ix86_target_string.
            (ix86_function_specific_print): Pass ptr->x_ix86_move_max and
            ptr->x_ix86_store_max to ix86_target_string.
            (ix86_valid_target_attribute_tree): Handle x_ix86_move_max and
            x_ix86_store_max.
            (ix86_option_override_internal): Set the default x_ix86_move_max
            and x_ix86_store_max.
            * config/i386/i386-options.h (ix86_target_string): Add
            prefer_vector_width and prefer_vector_width.
            * config/i386/i386.h (TARGET_AVX256_MOVE_BY_PIECES): Removed.
            (TARGET_AVX256_STORE_BY_PIECES): Likewise.
            (MOVE_MAX): Use 64 if ix86_move_max or ix86_store_max ==
            PVW_AVX512.  Use 32 if ix86_move_max or ix86_store_max >=
            PVW_AVX256.
            (STORE_MAX_PIECES): Use 64 if ix86_store_max == PVW_AVX512.
            Use 32 if ix86_store_max >= PVW_AVX256.
            * config/i386/i386.opt: Add -mmove-max=bits and -mstore-max=bits.
            * config/i386/x86-tune.def (X86_TUNE_AVX512_MOVE_BY_PIECES): New.
            (X86_TUNE_AVX512_STORE_BY_PIECES): Likewise.
            * doc/invoke.texi: Document -mmove-max=bits and -mstore-max=bits.

    gcc/testsuite/

            PR target/103269
            * gcc.target/i386/pieces-memcpy-17.c: New test.
            * gcc.target/i386/pieces-memcpy-18.c: Likewise.
            * gcc.target/i386/pieces-memcpy-19.c: Likewise.
            * gcc.target/i386/pieces-memcpy-20.c: Likewise.
            * gcc.target/i386/pieces-memcpy-21.c: Likewise.
            * gcc.target/i386/pieces-memset-45.c: Likewise.
            * gcc.target/i386/pieces-memset-46.c: Likewise.
            * gcc.target/i386/pieces-memset-47.c: Likewise.
            * gcc.target/i386/pieces-memset-48.c: Likewise.
            * gcc.target/i386/pieces-memset-49.c: Likewise.