debuggability of DF_REF_LOC

[Mike Stump]

I was trying to debug with DF_REF_LOC in gdb on linux, and got:

(gdb) p DF_REF_LOC (*ref) == recog_data.operand_loc[op]
No symbol "__null" in current context.

My fingers were not amused.  I found if I did:

(gdb) macro define __null 0

then I could do:

(gdb) p DF_REF_LOC (*ref) == recog_data.operand_loc[op]
$3 = true

and my fingers were again happy.

I checked this in.

-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: d.diffs.txt
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20130514/5224e37f/attachment.txt>
-------------- next part --------------