[Bug c/25206] New: for loop with comma operator problem

["ymonyak at lipowsky dot de" <gcc-bugzilla at gcc dot gnu dot org>]

GCC 4.0.1 bilt by GNUARM.

follow source has different read and store address by incrementing of "n".
As result variable "n" will be not changed.

unsigned short CommTxNum;

static void foo (void) __attribute__ ((interrupt ("IRQ")));
void foo(void)
{
unsigned char n;

 for (n = 0; n < 3 && CommTxNum; n++, CommTxNum++)
 {
...
 }
}


-- 
           Summary: for loop with comma operator problem
           Product: gcc
           Version: 4.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ymonyak at lipowsky dot de
 GCC build triplet: 4.0.1
  GCC host triplet: windows2000 sygwin
GCC target triplet: arm-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25206