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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hi Arshak,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Do you expect us to debug your pass for you? Have you run it in
GDB and seen where the segfault occurs?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal>3 opt
0x00000000004b3615 llvm::PATypeHolder::get() const + 21<o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Looks like the most likely suspect, run on a bad pointer. But
GDB would have told you this.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Also, PATypeHolder is deprecated and not available in mainline
trunk.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Cheers,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>James<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> llvmdev-bounces@cs.uiuc.edu [mailto:llvmdev-bounces@cs.uiuc.edu]
<b>On Behalf Of </b>Arshak Nazaryan<br>
<b>Sent:</b> 03 November 2011 10:56<br>
<b>To:</b> llvmdev@cs.uiuc.edu<br>
<b>Subject:</b> [LLVMdev] LLVM problem, please do not ignore<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Dear sir or madam,<o:p></o:p></p>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>I am a 4-th year student at Yerevan State University,
Armenia; and I am studying LLVM in order to write my Bachelor thesis.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>I am trying to write an llvm pass that just removes all
"Add" commands and gives some statstics. <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Nevertheless, I get this segmentation fault:<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>................some rows about functions, that are not
changed by my pass. The errors occurs after it has modified a
"@_Z3addii" function.<o:p></o:p></p>
</div>
<div>
<div>
<p class=MsoNormal>store i32 %b.0, i32* %4 and the type is ddddbbm 28<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> %5 = load i32* %a_addr, align 4 and the type is
ddddbbm 27<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> %6 = load i32* %b_addr, align 4 and the type is
ddddbbm 27<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> %7 = add nsw i32 %5, %6 and the type is ddddbbm
8<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> store i32 %7, i32* %0, align 4 and the type is
ddddbbm 28<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> %7 = add nsw i32 %5, %6 is erased, ba!<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> %7 = load i32* %0, align 4 and the type is
ddddbbm 27<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> store i32 %7, i32* %retval, align 4 and the
type is ddddbbm 28<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> br label %return and the type is ddddbbm 2<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> ret i32 %retval1 and the type is ddddbbm 1<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>0 opt
0x00000000008ed93f<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>1 opt
0x00000000008edcea<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>2 libpthread.so.0 0x00007f9ba1183c60<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>3 opt
0x00000000004b3615 llvm::PATypeHolder::get() const + 21<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>4 opt
0x00000000008a4f11<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>5 opt
0x00000000008a9404<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>6 opt
0x0000000000882557 llvm::FPPassManager::runOnFunction(llvm::Function&) +
551<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>7 opt
0x00000000008825db llvm::FPPassManager::runOnModule(llvm::Module&) + 75<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>8 opt
0x0000000000882197 llvm::MPPassManager::runOnModule(llvm::Module&) + 503<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>9 opt
0x0000000000882299 llvm::PassManagerImpl::run(llvm::Module&) + 137<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>10 opt
0x00000000004ac451 main + 4881<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>11 libc.so.6 0x00007f9ba0459eff
__libc_start_main + 255<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>12 opt
0x000000000049f5f9<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Stack dump:<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>0.<span class=apple-tab-span> </span>Program arguments:
opt hello.bc -load ../llvm/llvm-2.9/plugin/BasicBlockStats.so
-basic-block-stats -stats -o newhello.bc <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>1.<span class=apple-tab-span> </span>Running pass
'Function Pass Manager' on module 'hello.bc'.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>2.<span class=apple-tab-span> </span>Running pass
'Module Verifier' on function '@_Z3addii'<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Segmentation fault<o:p></o:p></p>
</div>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>Please find the source of my pass attached.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Hope to get a reply soon.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>Regards,<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Arshak Nazaryan<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
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