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[Bug tree-optimization/68775] spec2006 test case 465.tonto fails with the gcc 6.0 fortran compiler


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68775

--- Comment #4 from William Seurer <seurer at linux dot vnet.ibm.com> ---
(In reply to Richard Biener from comment #1)
> Can you try to bisect to an affected source file (just use
> -fno-tree-vectorize on all but one) and there to whether it is basic-block
> or loop vectorization
> (-fno-tree-loop-vectorize / -fno-tree-slp-vectorize) and specific
> loop/basic-block with -fdbg-cnt=vect_slp:N or -fdbg-cnt=vect_loop:N?
> 
> Note that it seems that tonto also fails (since forever) with AVX2 on x86_64.

It still fails with just -fno-tree-vectorize but succeeds with both
-fno-tree-loop-vectorize and -fno-tree-slp-vectorize.

I am about to go through it flipping those for individual modules.

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