[Bug target/81959] PowerPC __float128 optimization fails with integer PRE_INC addresses

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81959

--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri Dec  1 23:52:20 2017
New Revision: 255341

URL: https://gcc.gnu.org/viewcvs?rev=255341&root=gcc&view=rev
Log:
[gcc]
2017-12-01  Michael Meissner  <meiss...@linux.vnet.ibm.com>

        PR target/81959
        * config/rs6000/rs6000.c (rs6000_address_for_fpconvert): Check for
        whether we can allocate pseudos before trying to fix an address.
        * config/rs6000/rs6000.md (float_<mode>si2_hw): Make sure the
        memory address is indexed or indirect.
        (floatuns_<mode>si2_hw2): Likewise.

[gcct/testsuite]
2017-12-01  Michael Meissner  <meiss...@linux.vnet.ibm.com>

        PR target/81959
        * gcc.target/powerpc/pr81959.c: New test.


Added:
    trunk/gcc/testsuite/gcc.target/powerpc/pr81959.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/config/rs6000/rs6000.md
    trunk/gcc/testsuite/ChangeLog