On Mon, Aug 31, 2020 at 12:25 AM Richard Biener <rguent...@suse.de> wrote: > > On Sat, 29 Aug 2020, sunil.k.pandey wrote: > > > On Linux/x86_64, > > > > dccbf1e2a6e544f71b4a5795f0c79015db019fc3 is the first bad commit > > commit dccbf1e2a6e544f71b4a5795f0c79015db019fc3 > > Author: Richard Biener <rguent...@suse.de> > > Date: Mon Jul 6 16:26:50 2020 +0200 > > > > tree-optimization/96075 - fix bogus misalignment calculation > > > > caused > > > > FAIL: gcc.dg/vect/slp-46.c -flto -ffat-lto-objects scan-tree-dump-times > > vect "vectorizing stmts using SLP" 2 > > FAIL: gcc.dg/vect/slp-46.c scan-tree-dump-times vect "vectorizing stmts > > using SLP" 2 > > It might be useful to point out that the commit in question added the > testcase that "regressed" plus that you are using a non-standard > configuration (x86 vectorization unfortunately is too fragmented to > produce fully attributed or generic testcases that will pass with > any configuration). > > So the appropriate report would be "FAIL: gcc.dg/vect/slp-46.c > with -march=cascadelake" which isn't a regression. >
We analyze and report any new failures. When a testcase fails with -march=cascadelake, it can be 1. The testcase doesn't expect AVX512. 2. Compiler fails to handle AVX512. In any case, there are failures which didn't exist before the commit. -- H.J.
