On Thu, Mar 29, 2012 at 12:10 PM, Bin.Cheng <amker.ch...@gmail.com> wrote: > On Thu, Mar 29, 2012 at 6:07 PM, Richard Guenther > <richard.guent...@gmail.com> wrote: >> On Thu, Mar 29, 2012 at 12:02 PM, Bin.Cheng <amker.ch...@gmail.com> wrote: >>> Hi, >>> Following is the tree dump of 094t.pre for a test program. >>> Question is loads of D.5375_12/D.5375_14 are redundant on path <bb2, >>> bb7, bb5, bb6>, >>> but why not lowered into basic block 3, where it is used. >>> >>> BTW, seems no tree pass handles this case currently. >> >> tree-ssa-sink.c should do this. >> > It does not work for me, I will double check and update soon.
Well, "should" as in, it's the place to do it. And certainly the pass can sink loads, so this must be a missed optimization. Richard. > -- > Best Regards.
