On Fri, 31 Mar 2017, Markus Trippelsdorf wrote: > On 2017.03.31 at 11:16 +0200, Richard Biener wrote: > > On Fri, 31 Mar 2017, Richard Biener wrote: > > > > > On Fri, 31 Mar 2017, Rainer Orth wrote: > > > > > > > Hi Christophe, > > > > > > > > > With this patch, the following testcase now fails on arm* targets: > > > > > gcc.dg/tree-ssa/pr71347.c scan-tree-dump-not optimized ".* = MEM.*;" > > > > > > > > same on Solaris/SPARC. > > > > > > I've reverted r241968 with (patch reverted). It doesn't include > > > sparc, so please amend as you see fit. > > > > Ah, r241441. I'll fixup myself then. > > It also fails on some X86 configurations: > https://gcc.gnu.org/ml/gcc-regression/2017-03/msg00237.html > https://gcc.gnu.org/ml/gcc-regression/2017-03/msg00238.html
I see. The test is somewhat strange (well, it's an IVOPTS test). To simulate the effect of the PRE changes we could simply enable -fpredictive-commoning on it. Let's ask Bin what the testcase was supposed to test... (the testcase comment suggests that pcom is applied but it certainly wasn't before the xfails were removed). Richard.
