On 4/4/19 4:43 AM, Richard Sandiford wrote:
> This patch fixes a case in which, due to forced missed optimisations
> in earlier passes, we have:
>
> _1 = a * b
> _2 = -_1
> _3 = -_1
> _4 = _2 + _3
>
> and treated _4 as two FNMA candidates, once via _2 and once via _3.
>
> Tested on aarch64-linux-gnu. OK to install?
>
> Richard
>
>
> 2019-04-04 Richard Sandiford <richard.sandif...@arm.com>
>
> gcc/
> PR tree-optimization/89956
> * tree-ssa-math-opts.c (convert_mult_to_fma): Protected against
> multiple negates of the same value.
>
> gcc/testsuite/
> PR tree-optimization/89956
> * gfortran.dg/pr89956.f90: New test.
OK
jeff
