<html><head></head><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:24px"><div id="yiv6617619025yui_3_16_0_1_1449846637868_9811" class=""><span id="yiv6617619025yui_3_16_0_1_1449846637868_9810" class="">Hi,</span></div><div id="yiv6617619025yui_3_16_0_1_1449846637868_9692" class=""><br id="yui_3_16_0_1_1450279229586_5559" class=""></div><div id="yiv6617619025yui_3_16_0_1_1449846637868_9813" class="" dir="ltr"><span id="yiv6617619025yui_3_16_0_1_1449846637868_9812" class="">I know LLVM provides t</span><span style="font-family: Verdana;" id="yui_3_16_0_1_1450279229586_6959" class=""><font size="5" id="yui_3_16_0_1_1450279229586_7041">hread-level </font></span>automatic parallel support using OpenMP (see <span style="font-family: Verdana; font-size: 14px; line-height: 19.0909px;" id="yui_3_16_0_1_1450279229586_7056" class=""> </span><a href="http://blog.llvm.org/2015/05/openmp-support_22.html)." id="yui_3_16_0_1_1450279229586_6932" style="font-family: Verdana; font-size: 14px; line-height: 19.0909px; background-color: rgb(255, 255, 255);" class="">http://blog.llvm.org/2015/05/openmp-support_22.html</a>), but it is not clear for me which of the following is correct?</div><div id="yiv6617619025yui_3_16_0_1_1449846637868_9813" class=""><br></div><div id="yiv6617619025yui_3_16_0_1_1449846637868_9815" dir="ltr" class=""><span id="yiv6617619025yui_3_16_0_1_1449846637868_9814" class="">1. Clang inserts in the source code OpenMP compiler directives, so, it auto-parallelizes the serial source code provided as input or</span></div><div id="yiv6617619025yui_3_16_0_1_1449846637868_9815" dir="ltr" class=""><span id="yiv6617619025yui_3_16_0_1_1449846637868_9879" class="">2. Clang can compile manually written parallel source code that uses OpenMP directives</span></div><div id="yiv6617619025yui_3_16_0_1_1449846637868_9815" dir="ltr" class=""><br id="yui_3_16_0_1_1450279229586_5568" class=""></div><div id="yiv6617619025yui_3_16_0_1_1449846637868_9815" dir="ltr" class=""><span id="yiv6617619025yui_3_16_0_1_1449846637868_9969" class="">Best regards,</span></div><div id="yiv6617619025yui_3_16_0_1_1449846637868_9815" dir="ltr" class=""><span id="yiv6617619025yui_3_16_0_1_1449846637868_9968" class="">Iulia Stirb</span></div></div></body></html>