[Bug target/59952] -march=core-avx2 should not enable RTM

[thiago at kde dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59952

--- Comment #4 from Thiago Macieira <thiago at kde dot org> ---
(In reply to Mikael Pettersson from comment #3)
> There are also Haswells that lack BMI2.  I updated our dynamic binary
> instrumentation engine for AVX2 about a year ago, but while our Haswell box
> at the time had AVX2 it didn't have BMI2 etc, causing Intel's MKL to refuse
> to enter it AVX2 code paths.  So testing had to be limited to small
> assembly-coded kernels.

Are you sure? Unfortunately, ark.intel.com does not list BMI instruction level.