On Mon, Mar 25, 2013 at 7:00 PM, Thomas Koenig <tkoe...@netcologne.de> wrote: > Hello world, > > this patch uses memcpy() directly when comparing two kind=1 strings of > equal and constant lengths. The test case modification depends > on the previous patch at > > http://gcc.gnu.org/ml/gcc-patches/2013-03/msg00996.html > > for setting the string lengths for substrings. > > Regression-tested. No extra test case because the original test > cases have to be modified to avoid failure, and test the new > feature. OK for trunk after committing the patch above? > > 2013-03-25 Thomas Koenig <tkoe...@gcc.gnu.org> > > * trans-expr.c (build_memcmp_call): New function. > (gfc_build_compare_string): If the kind=1 strings to be > compared have constant and equal lengths, use > memcmp(). > > 2013-03-25 Thomas Koenig <tkoe...@gcc.gnu.org> > > * gfortran.dg/character_comparison_3.f90: Adjust for use of memcmp > for constant and equal string lengths. > * gfortran.dg/character_comparison_5.f90: Likewise.
Ok. I think the same optimization could be done for kind=4 strings as well, but nobody probably uses those anyway.. -- Janne Blomqvist
