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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> I need to write a pass where I need to find all the predecessors
of each leaf node. I think the options that I have is create a sub class
of ModulePass or CallGraphSCCPass. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> I will need to traverse the call graph bottom up and
by the description of CallGraphSCCPass, it seems the Pass to use. The
problem that I am facing is from a CallGraphNode, I don’t see any way to
get it’s callers. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> So I think it will be better to use ModulePass. I
start from the root. For each function called from root, I add root to
its predecessor list. Then I follow the same using BFS, and for each callee add
the caller as well as the predecessors of caller to callee’s predecessor
list.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> Any views or suggestions on this will be highly
appreciated. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Vasudev<o:p></o:p></span></font></p>
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