On Mon, 2013-06-17 at 21:36 +0200, Oleg Endo wrote: > > Sorry for not having an answer. I got curious, because just yesterday I > was looking at this one > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55190 > and thought that this is related, although it doesn't seem to. > I've tried the two functions of yours on SH and there it produces the > same machine code with -O2. -O3 results in a call to memcpy, while > -O3 -fno-tree-loop-distribute-patterns again results in the same code. > > Cheers, > Oleg
Thanks for the pointer. It made me realize I should try running my test with -fno-ivopts. That got rid of the '-4' usage and I wound up getting the code that I was after. I still hope someone can help me understand why ivopts made the transformation it did though. I am afraid that just turning off ivopts may have a larger affect then I am after. Steve Ellcey sell...@mips.com
