------- Comment #11 from jakub at gcc dot gnu dot org 2009-07-16 14:07 -------
You haven't mentioned what options you compiled this file with. So, assuming
-O2, I see:
add %i4, -1, %l5 ! n,, tmp186
sethi %hi(1073740800), %o2 !, tmp189
sll %l5, 2, %l5 ! tmp186,, D.4491
or %o2, 1023, %o2 ! tmp189,, tmp188
st %g1, [%i0+%l5] !,* D.4491
add %i4, %o2, %o2 ! n, tmp188, tmp187
mov %i0, %o0 ! a,
sll %o2, 2, %o2 ! tmp187,,
call memset, 0 !,
mov 0, %o1 !,
for this memset call, which looks correct to me. The st %g1, [%i0+%l5] line
stores to %i0 a[n-1] and memset is called with memset (a, 0, (n + 0x3fffffffU)
<< 2); So, if this doesn't work (and you see the same), you hit a bug in
Solaris memset implementation, which doesn't handle properly length with
garbage in upper 32-bits, guess it could use brz,pn %o2, do_nothing or
something similar, which is fine for 64-bit code, but certainly not for 32-bit
code.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40757
