ICE: reload_combine_note_store called with a rtx that has a size of 0

[John David Anglin]

> With a recent cvs of gcc-2.96 under hpux 10.20, cc1 dumps core in a
> number of tests in the testsuite.  For example, 

With debugging of this problem, I find that reload_combine_note_store
trips when the rtx dst has the mode BLKmode.  This is the rtl that causes
the segmentation fault in the combine phase:

;; Start of basic block 2, registers live: 3 [%r3] 30 [%r30]
(note 95 80 83 [bb 2] NOTE_INSN_BASIC_BLOCK)

(insn 83 95 0 (clobber (reg/i:BLK 28 %r28)) -1 (nil)
    (expr_list:REG_UNUSED (reg/i:BLK 28 %r28)
	    (nil)))
;; End of basic block 2

-- 
J. David Anglin                                  dave.anglin@nrc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6605)