------- Additional Comments From pinskia at gcc dot gnu dot org 2005-04-01
19:19 -------
This is not a regression and here is an example (compile on 3.2.3 with -O2 -
fomit-frame-pointer on i686-pc-linux-gnu and you get the same behavior as
pointed out here):
unsigned long foo (unsigned long *a, unsigned long *b,
unsigned long *c, int d)
{
unsigned long e, f,g,h;
// e = 0;f = 0;
if (d <= 0) return 0;
asm ("# registers %0 %1 %2 %3 %4 %5 %6 %7"
: "+a" (e),"+c" (d), "+r" (f), "+r"(g)
: "r" (a), "r" (b), "r" (c), "r"(h));
return e;
}
------ asm ----
#APP
# registers %eax %ecx %edx %ebp %edi %esi %ebx %edx
#NO_APP
Notice how edx are used for both input and output registers.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20718
