D23120: Use compiler __SSE2__ definitions and C++11 alignas

gladhorn created this revision.
Herald added a project: KWin.
Herald added a subscriber: kwin.
gladhorn requested review of this revision.

REVISION SUMMARY
  Since C++11 alignas is a keyword, so we don't need to create our own.
  All relevant compilers (gcc, clang, icc) define __SSE2__, so just use that.
  
  There seem to be frequent crashes in the quad version of this code, but
  this change should not make any difference from what I can tell.

REPOSITORY
  R108 KWin

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D23120

AFFECTED FILES
  libkwineffects/kwineffects.cpp

To: gladhorn
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