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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Thanks – extracting the call destination from the instruction operand is working much better! For my test bitcode, which contains only direct calls, this correctly matches all calls to their targets.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>I don’t suppose there’s an “easy” solution for identifying the targets of <i>indirect</i> calls (i.e., through function pointers)? I’ve been told that LLVM’s IR-level CallGraph analysis doesn’t account for indirect calls; is this still the case?<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Ethan Johnson <o:p></o:p></span></p><p class=MsoNormal><a name="_MailEndCompose"><span style='color:#1F497D'><o:p> </o:p></span></a></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Hal Finkel [mailto:hfinkel@anl.gov] <br><b>Sent:</b> Thursday, July 16, 2015 1:34 AM<br><b>To:</b> Ethan J. Johnson <ejohns48@cs.rochester.edu><br><b>Cc:</b> llvmdev@cs.uiuc.edu<br><b>Subject:</b> Re: [LLVMdev] Identifying function call targets at the MachineInstr level<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal style='margin-left:5.25pt'><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>This will not work in general, as you note below, this depends on a correspondence between calls on the IR and MI levels, and nothing guarantees this (and will not be true in practice because lowering of many different IR constructs inserts calls to libc, etc.). Instead, you can extract the call destination from the call instruction itself. If you iterate over the instruction's operands, you should find that one of them returns true for isGlobal(). On such an operand, you can call getGlobal() to get the IR-level GlobalValue* representing the function.<br><br>You might also find that isSymbol() is true, in which case you can call getSymbolName() (which returns a const char * with the symbol name).<br><br> -Hal</span><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'><o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div></div></div></div></body></html>