[Bug target/62055] missed optimization: recognize fnabs (FP negative absolute value) (x86-64)

[uros at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62055

--- Comment #6 from uros at gcc dot gnu.org ---
Author: uros
Date: Mon Jun 17 18:40:22 2019
New Revision: 272396

URL: https://gcc.gnu.org/viewcvs?rev=272396&root=gcc&view=rev
Log:
        PR target/62055
        * config/i386/i386.md (*nabstf2_1): New insn pattern.
        (*nabs<mode>2_1): Ditto.
        (nabs sse-reg splitter): New splitter.
        * config/i386/sse.md (*nabs<mode>2): New insn_and_split pattern.

testsuite/ChangeLog:

        PR target/62055
        * gcc.target/i386/fnabs.c: New test.


Added:
    trunk/gcc/testsuite/gcc.target/i386/fnabs.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.md
    trunk/gcc/config/i386/sse.md
    trunk/gcc/testsuite/ChangeLog