[Bug target/80180] Incorrect codegen from rdseed intrinsic use

[uros at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80180

--- Comment #3 from uros at gcc dot gnu.org ---
Author: uros
Date: Sat Mar 25 19:47:14 2017
New Revision: 246479

URL: https://gcc.gnu.org/viewcvs?rev=246479&root=gcc&view=rev
Log:
        PR target/80180
        * config/i386/i386.c (ix86_expand_builtin)
        <IX86_BUILTIN_RDSEED{16,32,64}_STEP>: Do not expand arg0 between
        flags reg setting and flags reg using instructions.
        <IX86_BUILTIN_RDRAND{16,32,64}_STEP>: Ditto.  Use non-flags reg
        clobbering instructions to zero extend op2.


Modified:
    branches/gcc-5-branch/gcc/ChangeLog
    branches/gcc-5-branch/gcc/config/i386/i386.c