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<p class="MsoNormal"><span lang="EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I’ve observed that FunctionPasses are not run when a specific argument order is handed to opt. I.e. when I specify:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">opt –O3 –float2int file.ll<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">… the FunctionPasses specified by populateFunctionPasses() are not run. However, if I put the –O3 after all manually specified passes, then the FunctionPasses are run:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">opt –float2int –O3 file.ll<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In the code (opt.cpp), we are explicitly checking the argument order (somewhere around line 537 for me):<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> if (OptLevelO3 && OptLevelO3.getPosition() < PassList.getPosition(i)) {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> AddOptimizationPasses(Passes, *FPasses, 3, 0);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> OptLevelO3 = false;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Note that we set OptLevelO3 to false above. Later, we run FPasses only if some OptLevelO<n> is true:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> FPasses->doInitialization();<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> for (Function &F : *M)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> FPasses->run(F);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> FPasses->doFinalization();<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> }<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thus FPasses are not run if –O<n> comes before any manually specified passes in the argument list. Anyone knows if this is intentional and if so, why?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jesper<o:p></o:p></span></p>
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