[Bug target/85287] ICE in in extract_insn, at recog.c:2304 on ppc64 with -fstack-clash-protection

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85287

--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Tue Apr 10 21:37:34 2018
New Revision: 259299

URL: https://gcc.gnu.org/viewcvs?rev=259299&root=gcc&view=rev
Log:
rs6000: Fix stack clash for big residuals (PR85287)

The stack clash protection code had a logic error in how it decided
whether to put the final update size in a register, or to emit it
directly in an insn.  This fixes it.  It also tidies some surrounding
code.


        PR target/85287
        * gcc/config/rs6000/rs6000.md (allocate_stack): Put the residual size
        for stack clash protection in a register whenever we need it to be in
        a register.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000.md