[Patch LRA] PR 61522 - Handle NULL targetm.spill_class

[Vladimir Makarov]

On 2014-06-16, 11:05 AM, Ramana Radhakrishnan wrote:
> Hi,
>
>      This handles NULL targetm.spill_class in assign_by_spills. This
> showed up as a segfault during a build for arm-none-linux-gnueabi(hf).
>
> Fix pre-approved by richi on IRC , verified that bootstrap continues
> from where things broke further on a tree (that reverts 211600 which is
> the next breakage causing commit on arm-none-linux-gnueabihf)
>
> I'll apply this in about 45 minutes when I get back to my desk if no one
> objects.
>
>

Ops, I've already committed the following patch (sorry I've not read 
email before doing this):

I apologize for my mistake with the original patch.

2014-06-16  Vladimir Makarov  <vmakarov@redhat.com>

         PR rtl-optimization/61522
         * lra-assigns.c (assign_by_spills): Check null
         targetm.spill_class.

Index: lra-assigns.c
===================================================================
--- lra-assigns.c       (revision 211710)
+++ lra-assigns.c       (working copy)
@@ -1425,7 +1425,8 @@
               enum reg_class rclass = lra_get_allocno_class (regno);
               enum reg_class spill_class;

-             if (lra_reg_info[regno].restore_regno < 0
+             if (targetm.spill_class == NULL
+                 || lra_reg_info[regno].restore_regno < 0
                   || ! bitmap_bit_p (&lra_inheritance_pseudos, regno)
                   || (spill_class
                       = ((enum reg_class)