Re: [PATCH PR72772]Also check equality for expanded iv base.

[Jeff Law]

On 08/03/2016 10:35 AM, Bin Cheng wrote:

Hi,
Following previous patch, this one fixes PR72772 by checking equality for 
expanded iv base.  Richard is fixing the PR by removing degenerate PHI at the 
first place, but I think this one also catches more cases.
Bootstrap and test on x86_64 and AArch64.  Is it OK?

Thanks,
bin

2016-08-02  Bin Cheng  <bin.ch...@arm.com>

        PR tree-optimization/72772
        * tree-ssa-loop-niter.c (loop_exits_before_overflow): Check equality
        for expanded base.

gcc/testsuite/ChangeLog
2016-08-02  Bin Cheng  <bin.ch...@arm.com>

        PR tree-optimization/pr72772
        * gcc.dg/tree-ssa/pr72772.c: New test.

OK.
jeff