[Bug rtl-optimization/43721] New: Failure to optimise (a/b) and (a%b) into single __aeabi_idivmod call

[mans at mansr dot com]

Consider the following code:

int divmod(int a, int b)
{
    int q = a / b;
    int r = a % b;
    return q + r;
}

For an ARM EABI target, this results in one __aeabi_idivmod() call and one
__aeabi_idiv() call even though the former already calculates the quotient.


-- 
           Summary: Failure to optimise (a/b) and (a%b) into single
                    __aeabi_idivmod call
           Product: gcc
           Version: 4.4.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mans at mansr dot com
 GCC build triplet: x86_64-pc-linux-gnu
  GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: arm-unknown-linux-gnueabi


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43721