------- Additional Comments From rakdver at atrey dot karlin dot mff dot cuni dot cz 2004-12-07 23:13 ------- Subject: Re: ICE with -O1 -ftree-loop-linear on small test case
> ------- Additional Comments From dberlin at dberlin dot org 2004-12-07 23:09 > ------- > Subject: Re: ICE with -O1 -ftree-loop-linear > on small test case > > It's actually a bug in compute_data_dependence then, not linear xforms. > > the dist and dir vector computation functions need to map between the > loops we've asked for, and indexes in their array, in a different way. > > Currently this is done by assuming that the indexes are sequential, and > we just subtract the index of the top of the nest, and use that as the > index into the array. > If the loop indexes aren't sequential in a nest, this won't work. > We'll have to use a mapping array or something. You may use the loop->depth field for indexing the array instead. It is always updated, and of course increases sequentially within the loop nest. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18792
