[Bug target/53416] Wrong code when optimising loop involving _rdrand32_step

[hjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53416

--- Comment #3 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> 2012-05-21 
12:59:58 UTC ---
Author: hjl
Date: Mon May 21 12:59:53 2012
New Revision: 187712

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187712
Log:
Use unspec_volatile on rdrand<mode>_1

gcc/

    Backport from mainline
    PR target/53416
    * config/i386/i386.md (UNSPEC_RDRAND): Renamed to ...
    (UNSPECV_RDRAND): This.
    (rdrand<mode>_1): Updated.


gcc/testsuite/

    Backport from mainline
    PR target/53416
    * gcc.target/i386/pr53416.c: New file.

Added:
    branches/gcc-4_6-branch/gcc/testsuite/gcc.target/i386/pr53416.c
Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/config/i386/i386.md
    branches/gcc-4_6-branch/gcc/testsuite/ChangeLog