[Bug target/81015] Bad codegen for __builtin_clz(unsigned short)

[uros at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81015

--- Comment #4 from uros at gcc dot gnu.org ---
Author: uros
Date: Thu Jun  8 19:42:59 2017
New Revision: 249039

URL: https://gcc.gnu.org/viewcvs?rev=249039&root=gcc&view=rev
Log:
        PR target/81015
        Revert:
        2016-12-14  Uros Bizjak  <ubiz...@gmail.com>

        PR target/59874
        * config/i386/i386.md (*ctzhi2): New insn_and_split pattern.
        (*clzhi2): Ditto.

testsuite/ChangeLog:

        PR target/81015
        * gcc.target/i386/pr59874-1.c (foo): Call __builtin_ctzs.
        * gcc.target/i386/pr59874-2.c (foo): Call __builtin_clzs.
        * gcc.target/i386/pr81015.c: New test.


Added:
    branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr81015.c
Modified:
    branches/gcc-7-branch/gcc/ChangeLog
    branches/gcc-7-branch/gcc/config/i386/i386.md
    branches/gcc-7-branch/gcc/testsuite/ChangeLog
    branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr59874-1.c
    branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr59874-2.c