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<div class="moz-cite-prefix">On 11/14/14, 6:53 AM, Qingan Li wrote:<br>
</div>
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cite="mid:CAN5dsDFVD18cjeabJcWp3-39NVR73TBuqf9cXJvP+z+U4DtEYg@mail.gmail.com"
type="cite">
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<div>Hi,</div>
<div><br>
</div>
<div>Recently, I am working on some information collection on
the machine instruction (MachineInstr) level.</div>
<div>But, sometimes, I need check the corresponding IR level
instruction of the a machine instruction.</div>
<div><br>
</div>
<div>When visiting a machine instruction which is a call
(MachineInstr::isCall()), I need to check the arguments of
this call site.</div>
<div>I know that the CallSite class provides good facility for
this work, but the CallSite can be constructed only
fromInstruction rather than MachineInstr.</div>
<div><br>
</div>
<div>Is there any workaround? <br>
</div>
</div>
</blockquote>
<br>
If you're working on MachineInstr's, then you can probably examine
the MachineIntr's operands to determine which function is being
called. This probably won't be target independent, but if you're
working at the MachineInstr level, you're not doing target
independent work, anyway.<br>
<br>
Alternatively, you should check to see if the MachineBasicBlock has
a method to fetch the BasicBlock from which it was generated. Using
that, you could potentially scan the BasicBlock looking for a
CallInst or InvokeInst that is likely to match the MachineInstr.<br>
<br>
Regards,<br>
<br>
John Criswell<br>
<br>
<blockquote
cite="mid:CAN5dsDFVD18cjeabJcWp3-39NVR73TBuqf9cXJvP+z+U4DtEYg@mail.gmail.com"
type="cite">
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<div><br>
</div>
<div>Thanks.</div>
<div><br>
</div>
-- <br>
<div class="gmail_signature">Best regards,
<div><br>
</div>
<div>Li Qingan</div>
</div>
</div>
<br>
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</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
John Criswell
Assistant Professor
Department of Computer Science, University of Rochester
<a class="moz-txt-link-freetext" href="http://www.cs.rochester.edu/u/criswell">http://www.cs.rochester.edu/u/criswell</a></pre>
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