I wonder how this happened?

[John David Anglin]

> The problem is that the call to ungetc at line 1023 of rtl.c is partially gone.

It disappers in flow2.  Here is the line in rtl.c.19.greg:

(note 585 1444 586 ("../../gcc/rtl.c") 1023 -1347440721)

(insn 586 585 587 (set (mem/f:SI (pre_dec:SI (reg:SI 14 sp)) 0)
        (reg/v:SI 8 r8)) 16 {movsi} (nil)
    (nil))

(insn 587 586 588 (set (mem/f:SI (pre_dec:SI (reg:SI 14 sp)) 0)
        (reg/v:SI 6 r6)) 16 {movsi} (nil)
    (nil))

(note 588 587 589 NOTE_INSN_DELETED 0)

(call_insn 589 588 590 (parallel[ 
            (set (reg:SI 0 r0)
                (call (mem:QI (symbol_ref:SI ("ungetc")) 0)
                    (const_int 8 [0x8])))
            (set (reg:SI 14 sp)
                (plus:SI (reg:SI 14 sp)
                    (const_int 8 [0x8])))
        ] ) 135 {call_value_pop} (nil)
    (nil)
    (nil))

(note 590 589 591 ("../../gcc/rtl.c") 1024 -1347440721)

Here is what is left after flow2:

(note 585 1444 586 ("../../gcc/rtl.c") 1023 -1347440721)

(insn 586 585 587 (set (mem/f:SI (pre_dec:SI (reg:SI 14 sp)) 0)
        (reg/v:SI 8 r8)) 16 {movsi} (nil)
    (nil))

(insn 587 586 588 (set (mem/f:SI (pre_dec:SI (reg:SI 14 sp)) 0)
        (reg/v:SI 6 r6)) 16 {movsi} (nil)
    (expr_list:REG_DEAD (reg/v:SI 6 r6)
        (nil)))

(note 588 587 590 NOTE_INSN_DELETED 0)

(note 590 588 591 ("../../gcc/rtl.c") 1024 -1347440721)

Thoughts?

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