Re: [PATCH GCC 7/9]Skip loops iterating only 1 time in predictive commoning

[Jeff Law]

On 09/06/2016 12:53 PM, Bin Cheng wrote:

Hi,
For loops which are bounded to iterate only 1 time (thus loop's latch doesn't 
roll), there is nothing to predictive common, this patch detects/skips these 
cases.  A test is also added in 
gcc/testsuite/gfortran.dg/vect/fast-math-mgrid-resid.f for this.

Thanks,
bin

2016-09-01  Bin Cheng  <bin.ch...@arm.com>

        * tree-predcom.c (tree_predictive_commoning_loop): Skip loop that only
        iterates 1 time.

gcc/testsuite/ChangeLog
2016-09-01  Bin Cheng  <bin.ch...@arm.com>

        * gfortran.dg/vect/fast-math-mgrid-resid.f: New test string.

OK.
jeff