[Bug tree-optimization/68501] [6 Regression] sqrt builtin is not used anymore

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68501

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Nov 30 14:56:08 2015
New Revision: 231075

URL: https://gcc.gnu.org/viewcvs?rev=231075&root=gcc&view=rev
Log:
        PR tree-optimization/68501
        * target.def (builtin_reciprocal): Replace the 3 arguments with
        a gcall * one, adjust description.
        * targhooks.h (default_builtin_reciprocal): Replace the 3 arguments
        with a gcall * one.
        * targhooks.c (default_builtin_reciprocal): Likewise.
        * tree-ssa-math-opts.c (pass_cse_reciprocals::execute): Use
        targetm.builtin_reciprocal even on internal functions, adjust
        the arguments and allow replacing an internal function with normal
        built-in.
        * config/i386/i386.c (ix86_builtin_reciprocal): Replace the 3 arguments
        with a gcall * one.  Handle internal fns too.
        * config/rs6000/rs6000.c (rs6000_builtin_reciprocal): Likewise.
        * config/aarch64/aarch64.c (aarch64_builtin_reciprocal): Likewise.
        * doc/tm.texi (builtin_reciprocal): Document.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/aarch64/aarch64.c
    trunk/gcc/config/i386/i386.c
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/doc/tm.texi
    trunk/gcc/target.def
    trunk/gcc/targhooks.c
    trunk/gcc/targhooks.h
    trunk/gcc/tree-ssa-math-opts.c