[PATCH][x86] Knights Mill -march/-mtune options

[Peryt, Sebastian]

Hi,

This patch adds  options -march=/-mtune=knm for Knights Mill.

2017-09-14  Sebastian Peryt  <sebastian.pe...@intel.com>
gcc/

        * config.gcc: Support "knm".
        * config/i386/driver-i386.c (host_detect_local_cpu): Detect "knm".
        * config/i386/i386-c.c (ix86_target_macros_internal): Handle
        PROCESSOR_KNM.
        * config/i386/i386.c (m_KNM): Define.
        (processor_target_table): Add "knm".
        (PTA_KNM): Define.
        (ix86_option_override_internal): Add "knm".
        (ix86_issue_rate): Add PROCESSOR_KNM.
        (ix86_adjust_cost): Ditto.
        (ia32_multipass_dfa_lookahead): Ditto.
        (get_builtin_code_for_version): Handle PROCESSOR_KNM.
        (fold_builtin_cpu): Define M_INTEL_KNM.
        * config/i386/i386.h (TARGET_KNM): Define.
        (processor_type): Add PROCESSOR_KNM.
        * config/i386/x86-tune.def: Add m_KNM.
        * doc/invoke.texi: Add knm as x86 -march=/-mtune= CPU type.


    gcc/testsuite/

        * gcc.target/i386/funcspec-5.c: Test knm.

Is it ok for trunk?

Thanks,
Sebastian

KNM_enabling.patch
Description: KNM_enabling.patch