search for: preservescriticalpathlen

...ry 03, 2015 4:34 PM To: 'llvmdev at cs.uiuc.edu' Cc: 'ghoflehner at apple.com'; 'apazos at codeaurora.org'; mgrang at codeaurora.org Subject: Question on Machine Combiner Pass Hi, In the file lib/CodeGen/MachineCombiner.cpp I see that in the function MachineCombiner::preservesCriticalPathLen we try to determine whether the new combined instruction lengthens the critical path or not. In order to do this we compute the depth and latency for the current instruction (MUL+ADD) and the alternate instruction (MADD). But we call two different set of APIs for the current and new instructi...