------- Comment #3 from carlos at systemhalted dot org 2006-08-16 06:48 -------
Dumping vfprintf.c compile with -S and -da
; basic block 131
.LBE379:
.LBB380:
.LBB380:
; vfprintf.c:1448
.loc 2 1448 0
ldw 8(%r3),%r28
ldil L'16384,%r22
ldb 0(%r28),%r21
.LVL339:
ldo -6804(%r22),%r22
extrs %r21,31,8,%r28
addl %r22,%r3,%r22
stw %r28,0(%r22)
ldo -32(%r21),%r20
ldi 90,%r28
extru %r20,31,8,%r20
; vfprintf.c:1562
.loc 2 1562 0
; vfprintf.c:1448
.loc 2 1448 0
comb,<< %r28,%r20,.L1104
ldil L'16384,%r21
^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Incorrect delay slot fill.
; basic block 313
.LVL557:
.L1104:
.LBE425:
.LBE418:
.LBE417:
.LBB426:
; vfprintf.c:1562
.loc 2 1562 0
ldo -6804(%r21),%r21
addl %r21,%r3,%r21
ldw 0(%r21),%r21
bb 313 is missing the first insn.
The output of vfprintf.c.157r.dbr shows:
(barrier 18544 18543 2803)
(note 2803 18544 14801 ("vfprintf.c") 1561)
(note 14801 2803 14802 ( size (expr_list:REG_DEP_TRUE (reg/v:SI 5 %r5 [orig:281
size ] [281])
(const_int 0 [0x0]))) NOTE_INSN_VAR_LOCATION)
(note 14802 14801 14803 ( function_done (nil)) NOTE_INSN_VAR_LOCATION)
(note 14803 14802 14804 ( size (expr_list:REG_DEP_TRUE (reg/v:SI 5 %r5
[orig:280 size ] [280])
(const_int 0 [0x0]))) NOTE_INSN_VAR_LOCATION)
(note 14804 14803 14805 ( __self (expr_list:REG_DEP_TRUE (reg/v/f:SI 5 %r5
[orig:364 __self ] [364])
(const_int 0 [0x0]))) NOTE_INSN_VAR_LOCATION)
(note 14805 14804 14806 ( ptr (expr_list:REG_DEP_TRUE (reg/v/f:SI 21 %r21
[orig:346 ptr ] [346])
(const_int 0 [0x0]))) NOTE_INSN_VAR_LOCATION)
(note 14806 14805 2804 ( size (expr_list:REG_DEP_TRUE (reg/v:SI 5 %r5 [orig:282
size ] [282])
(const_int 0 [0x0]))) NOTE_INSN_VAR_LOCATION)
(code_label/s 2804 14806 2805 242 ("do_form_unknown") [1 uses])
(note 2805 2804 2806 [bb 313] NOTE_INSN_BASIC_BLOCK)
(note 2806 2805 14807 ("vfprintf.c") 1562)
(note 14807 2806 19223 ( ptr (nil)) NOTE_INSN_VAR_LOCATION)
(code_label 19223 14807 8862 1104 "" [2 uses])
(insn 8862 19223 8863 vfprintf.c:1562 (set (reg/f:SI 21 %r21)
(plus:SI (reg/f:SI 21 %r21)
(const_int -6804 [0xffffe56c]))) 114 {addsi3} (nil)
(expr_list:REG_EQUAL (const_int 9580 [0x256c])
(nil)))
And the set has been moved into bb 131
(insn 19224 831 14145 vfprintf.c:1562 (sequence [
(jump_insn:TI 833 831 8861 vfprintf.c:1448 (set (pc)
(if_then_else (gtu (reg:SI 20 %r20 [782])
(reg:SI 28 %r28 [783]))
(label_ref:SI 19223)
(pc))) -1 (nil)
(expr_list:REG_BR_PRED (const_int 4 [0x4])
(expr_list:REG_DEAD (reg:SI 20 %r20 [782])
(expr_list:REG_DEAD (reg:SI 28 %r28 [783])
(expr_list:REG_EQUAL (if_then_else (gtu (reg:SI 20
%r20 [782])
(const_int 90 [0x5a]))
(label_ref:SI 19223)
(pc))
(expr_list:REG_BR_PROB (const_int 5000
[0x1388])
(nil)))))))
(insn/s:TI 8861 833 14145 (set (reg/f:SI 21 %r21)
(const_int 16384 [0x4000])) 37 {*pa.md:2482} (nil)
(nil))
]) -1 (nil)
(nil))
While vfprintf.c.156r.barriers shows:
(barrier 12266 12265 2803)
(note 2803 12266 14801 ("vfprintf.c") 1561)
(note 14801 2803 14802 ( size (expr_list:REG_DEP_TRUE (reg/v:SI 5 %r5 [orig:281
size ] [281])
(const_int 0 [0x0]))) NOTE_INSN_VAR_LOCATION)
(note 14802 14801 14803 ( function_done (nil)) NOTE_INSN_VAR_LOCATION)
(note 14803 14802 14804 ( size (expr_list:REG_DEP_TRUE (reg/v:SI 5 %r5
[orig:280 size ] [280])
(const_int 0 [0x0]))) NOTE_INSN_VAR_LOCATION)
(note 14804 14803 14805 ( __self (expr_list:REG_DEP_TRUE (reg/v/f:SI 5 %r5
[orig:364 __self ] [364])
(const_int 0 [0x0]))) NOTE_INSN_VAR_LOCATION)
(note 14805 14804 14806 ( ptr (expr_list:REG_DEP_TRUE (reg/v/f:SI 21 %r21
[orig:346 ptr ] [346])
(const_int 0 [0x0]))) NOTE_INSN_VAR_LOCATION)
(note 14806 14805 2804 ( size (expr_list:REG_DEP_TRUE (reg/v:SI 5 %r5 [orig:282
size ] [282])
(const_int 0 [0x0]))) NOTE_INSN_VAR_LOCATION)
(code_label/s 2804 14806 2805 242 ("do_form_unknown") [5 uses])
(note 2805 2804 2806 [bb 313] NOTE_INSN_BASIC_BLOCK)
(note 2806 2805 8861 ("vfprintf.c") 1562)
(insn:TI 8861 2806 14807 vfprintf.c:1562 (set (reg/f:SI 21 %r21)
(const_int 16384 [0x4000])) 37 {*pa.md:2482} (nil)
(nil))
That is is still present in the correct basic block before dbr, and the label
and barriers are present.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28749
