Comment about function `foo' size:
27 /* function foo size 10 (9) */
show wrong value. (Compare it with next function.)
Compiler: avr-gcc (GCC) 4.0.0 20050109 (experimental)
Options: -W -Wall -Os -Wa,-ahl
The same error (for `foo') in 3.3.4 .
Certainly, it is nonsense. But, maybe, this display
of more serious mistake?
Program:
~~~~~~~~
int foo (int x)
{
int i;
for (i= 10; i; i--)
x *= 2;
return x;
}
int foo_with_true_size (int x)
{
x += 100;
do {
x *= 2;
} while (x > 0);
return x;
}
Listing:
~~~~~~~~
GAS LISTING /tmp/ccJGSrye.s page 1
1 .file "foo.c"
2 .arch avr2
3 __SREG__ = 0x3f
4 __SP_H__ = 0x3e
5 __SP_L__ = 0x3d
6 __tmp_reg__ = 0
7 __zero_reg__ = 1
8 .global __do_copy_data
9 .global __do_clear_bss
10 .text
11 .global foo
12 .type foo, @function
13 foo:
14 /* prologue: frame size=0 */
15 /* prologue end (size=0) */
16 0000 2AE0 ldi r18,lo8(10)
17 0002 30E0 ldi r19,hi8(10)
18 .L2:
19 0004 880F add r24,r24
20 0006 991F adc r25,r25
21 0008 2150 subi r18,lo8(-(-1))
22 000a 3040 sbci r19,hi8(-(-1))
23 000c D9F7 brne .L2
24 /* epilogue: frame size=0 */
25 000e 0895 ret
26 /* epilogue end (size=1) */
27 /* function foo size 10 (9) */
28 .size foo, .-foo
29 .global foo_with_true_size
30 .type foo_with_true_size, @function
31 foo_with_true_size:
32 /* prologue: frame size=0 */
33 /* prologue end (size=0) */
34 0010 8C59 subi r24,lo8(-(100))
35 0012 9F4F sbci r25,hi8(-(100))
36 .L8:
37 0014 880F add r24,r24
38 0016 991F adc r25,r25
39 0018 1816 cp __zero_reg__,r24
40 001a 1906 cpc __zero_reg__,r25
41 001c DCF3 brlt .L8
42 /* epilogue: frame size=0 */
43 001e 0895 ret
44 /* epilogue end (size=1) */
45 /* function foo_with_true_size size 8 (7) */
46 .size foo_with_true_size,
.-foo_with_true_size
47 /* File "foo.c": code 18 = 0x0012 ( 16), prologues
0, epilogues 2 */
--
Summary: avr-gcc 4.0 (and 3.3.4): wrong size in asm comment
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dmixm at marine dot febras dot ru
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19684
