Re: [PATCH] tree-optimization/101173 - fix interchange dependence checking

[Jeff Law via Gcc-patches]

On 6/23/2021 7:16 AM, Richard Biener wrote:

This adjusts the loop interchange dependence checking to disallow
an outer loop dependence distance of zero.

Bootstrapped and tested on x86_64-unknown-linux-gnu, OK?

Thanks,
Richard.

2021-06-23  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/101173
        * gimple-loop-interchange.cc
        (tree_loop_interchange::valid_data_dependences): Disallow outer
        loop dependence distance of zero.

        * gcc.dg/torture/pr101173.c: New testcase.

OK
jeff