ia64.md (prologue_allocate_stack): Block auto- generation of predicated version.

ChangeLog/

        * config/ia64/ia64.md (prologue_allocate_stack): Block auto-
        generation of predicated version.
        (epilogue_deallocate_stack): Ditto.
        (prologue_allocate_stack_pr): Add explicit predicated version.
        (epilogue_deallocate_stack_pr): Ditto.
        * config/ia64/ia64.c (ia64_single_set): Use explicit versions.

testsuite/ChangeLog/

        * gcc.target/ia64/pr52731.c: New.

From-SVN: r205692