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<DIV><FONT size=2 face=Arial><SPAN class=102302903-17022010>Sorry to ask about a
documented use of bugpoint, but I am having trouble understanding what to
do.</SPAN></FONT></DIV>
<DIV><FONT size=2 face=Arial><SPAN
class=102302903-17022010></SPAN></FONT> </DIV>
<DIV><FONT size=2 face=Arial><SPAN class=102302903-17022010>I would like to be
able to use bugpoint to simplify test cases, when the symptom is a run time
difference in the testprogram behavior. That looks like what is described in the
documentation as "miscompilation or perhaps code generation problems". There are
examples in the LLVM doc showing runs with -output argument to supply the
expected output, -args to give the program arguments, and -tool-args give
arguments to, in this case, llc. The problem is that I can't seem to get
bugpoint to run this way, and its probably my fault.</SPAN></FONT></DIV><SPAN
class=102302903-17022010>
<DIV><FONT size=2 face=Arial></FONT><BR><FONT face=Arial><FONT size=2>Can
someone give me an example for LLVM 4.2.1 that runs bugpoint in
this way<SPAN
class=102302903-17022010>:</SPAN> </FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT size=2></FONT></FONT> </DIV>
<DIV><FONT face=Arial><FONT size=2>1<SPAN class=102302903-17022010>)
</SPAN><SPAN class=102302903-17022010>I want to run a test compiled to
bitcode (this is the bugpoint input). I have
this.</SPAN></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT size=2><SPAN class=102302903-17022010>2) The bitcode
compiled with llc to a .s file by bugpoint.</SPAN></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT size=2><SPAN class=102302903-17022010>3) Then the .s
file linked with gcc by bugpoint.</SPAN></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT size=2><SPAN class=102302903-17022010>4) The final
file run automatically by bugpoint against oggenc output compiled by
llvm-gcc straight to native code</SPAN></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT size=2><SPAN
class=102302903-17022010></SPAN></FONT></FONT> </DIV>
<DIV><FONT face=Arial><FONT size=2><SPAN class=102302903-17022010>It then
iterates until a simplified test case is created whose output is still different
from that of the native code.</SPAN></FONT></FONT></SPAN></DIV>
<DIV><FONT size=2 face=Arial><SPAN
class=102302903-17022010></SPAN></FONT> </DIV>
<DIV><FONT size=2 face=Arial><SPAN
class=102302903-17022010>thanks,</SPAN></FONT></DIV>
<DIV><FONT size=2 face=Arial><SPAN
class=102302903-17022010>-David</SPAN></FONT></DIV></BODY></HTML>