[Bug target/49547] LZCNT should be enabled only if ABM or LZCNT bits are set

[hjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49547

--- Comment #6 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> 2011-08-01 13:47:39 UTC ---
Author: hjl
Date: Mon Aug  1 13:47:31 2011
New Revision: 177034

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=177034
Log:
Add -mlzcnt.

gcc/

2011-08-01  Kirill Yukhin  <kirill.yukhin@intel.com>

    PR target/49547
    * config.gcc (i[34567]86-*-*): Replace abmintrin.h with
    lzcntintrin.h.
    (x86_64-*-*): Likewise.
    * config/i386/i386.opt (mlzcnt): New.
    * config/i386/abmintrin.h: File removed.
    (__lzcnt_u16, __lzcnt, __lzcnt_u64): Moved to ...
    * config/i386/lzcntintrin.h: ... here. New file.
    (__lzcnt): Rename to ...
    (__lzcnt32): ... this.
    * config/i386/bmiintrin.h (head): Update copyright year.
    (__lzcnt_u16): Removed.
    (__lzcnt_u32): Likewise.
    (__lzcnt_u64): Likewise.
    * config/i386/x86intrin.h: Include lzcntintrin.h when __LZCNT__
    is defined, remove abmintrin.h.
    * config/i386/cpuid.h (bit_LZCNT): New.
    * config/i386/driver-i386.c (host_detect_local_cpu): Detect
    LZCNT feature.
    * config/i386/i386-c.c (ix86_target_macros_internal): Define
    __LZCNT__ if needed.
    * config/i386/i386.c (ix86_target_string): New option -mlzcnt.
    (ix86_option_override_internal): Handle LZCNT option.
    (ix86_valid_target_attribute_inner_p): Likewise.
    (struct builtin_description bdesc_args) <IX86_BUILTIN_CLZS>: Update.
    * config/i386/i386.h (TARGET_LZCNT): New.
    (CLZ_DEFINED_VALUE_AT_ZERO): Update.
    * config/i386/i386.md (clz<mode>2): Update insn constraint.
    (clz<mode>2_lzcnt): Likewise.
    * doc/invoke.texi: Mention -mlzcnt option.
    * doc/extend.texi: Likewise.

gcc/testsuite/

2011-08-01  Kirill Yukhin  <kirill.yukhin@intel.com>

    * gcc.target/i386/i386.exp (check_effective_target_lzcnt): New.
    * gcc.target/i386/lzcnt-1.c: New test.
    * gcc.target/i386/lzcnt-2.c: Likewise.
    * gcc.target/i386/lzcnt-2a.c: Likewise.
    * gcc.target/i386/lzcnt-3.c: Likewise.
    * gcc.target/i386/lzcnt-4.c: Likewise.
    * gcc.target/i386/lzcnt-4a.c: Likewise.
    * gcc.target/i386/lzcnt-5.c: Likewise.
    * gcc.target/i386/lzcnt-6.c: Likewise.
    * gcc.target/i386/lzcnt-6a.c: Likewise.
    * gcc.target/i386/lzcnt-check.h: Likewise.

    * gcc.target/i386/sse-12.c (dg-compile): Add -mlzcnt.
    * gcc.target/i386/sse-13.c: Likewise.
    * gcc.target/i386/sse-14.c: Likewise.
    * g++.dg/other/i386-2.C: Likewise.
    * g++.dg/other/i386-3.C: Likewise.

Added:
    trunk/gcc/config/i386/lzcntintrin.h
    trunk/gcc/testsuite/gcc.target/i386/lzcnt-1.c
    trunk/gcc/testsuite/gcc.target/i386/lzcnt-2.c
    trunk/gcc/testsuite/gcc.target/i386/lzcnt-2a.c
    trunk/gcc/testsuite/gcc.target/i386/lzcnt-3.c
    trunk/gcc/testsuite/gcc.target/i386/lzcnt-4.c
    trunk/gcc/testsuite/gcc.target/i386/lzcnt-4a.c
    trunk/gcc/testsuite/gcc.target/i386/lzcnt-5.c
    trunk/gcc/testsuite/gcc.target/i386/lzcnt-6.c
    trunk/gcc/testsuite/gcc.target/i386/lzcnt-6a.c
    trunk/gcc/testsuite/gcc.target/i386/lzcnt-check.h
Removed:
    trunk/gcc/config/i386/abmintrin.h
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config.gcc
    trunk/gcc/config/i386/bmiintrin.h
    trunk/gcc/config/i386/cpuid.h
    trunk/gcc/config/i386/driver-i386.c
    trunk/gcc/config/i386/i386-c.c
    trunk/gcc/config/i386/i386.c
    trunk/gcc/config/i386/i386.h
    trunk/gcc/config/i386/i386.md
    trunk/gcc/config/i386/i386.opt
    trunk/gcc/config/i386/x86intrin.h
    trunk/gcc/doc/extend.texi
    trunk/gcc/doc/invoke.texi
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/other/i386-2.C
    trunk/gcc/testsuite/g++.dg/other/i386-3.C
    trunk/gcc/testsuite/gcc.target/i386/i386.exp
    trunk/gcc/testsuite/gcc.target/i386/sse-12.c
    trunk/gcc/testsuite/gcc.target/i386/sse-13.c
    trunk/gcc/testsuite/gcc.target/i386/sse-14.c