http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53916
--- Comment #1 from anmin_deng at yahoo dot com.tw 2012-07-13 11:41:37 UTC --- I recently tried the very same configurations and codes and tests with GCC-4.7.1. It seems that the generated disassemble by GCC-4.7.1 is OK (I have not yet checked very closely to confirm). However, the generated results by GCC-4.7.1 with '-O2' and '-Os' are not very optimal compared to the results by GCC-4.6.3 with '-Os'. The generated code by GCC-4.6.3 with '-Os' runs 'divu' instruction once (per loop) and using HI and LO registers resulted from the same 'divu' as remainder and quotient. The generated code by GCC-4.7.1 runs 'divu' instruction twice, one 'divu' for HI (remainder) and the other 'divu' for LO (quotient).
