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<head>
<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Backend crash when emitting optimized code with debug info"
href="http://llvm.org/bugs/show_bug.cgi?id=20416">20416</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Backend crash when emitting optimized code with debug info
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Backend: PTX
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>eliben@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=12814" name="attach_12814" title="reproducer">attachment 12814</a> <a href="attachment.cgi?id=12814&action=edit" title="reproducer">[details]</a></span>
reproducer
Sample IR file attached.
--------------
llc -march=nvptx -o z.ptx compute.optimized.ll
llc: /media/SSD1/llvm/llvm_svn_rw/include/llvm/MC/MCRegisterInfo.h:316: const
llvm::MCRegisterDesc& llvm::MCRegisterInfo::operator[](unsigned int) const:
Assertion `RegNo < NumRegs && "Attempting to access record for invalid register
number!"' failed.
0 llc 0x0000000001c24431 llvm::sys::PrintStackTrace(_IO_FILE*) +
38
1 llc 0x0000000001c246ae
2 llc 0x0000000001c2405d
3 libpthread.so.0 0x00007f53d1faccb0
4 libc.so.6 0x00007f53d0dcc425 gsignal + 53
5 libc.so.6 0x00007f53d0dcfb8b abort + 379
6 libc.so.6 0x00007f53d0dc50ee
7 libc.so.6 0x00007f53d0dc5192
8 llc 0x0000000000b6ed4c
9 llc 0x0000000000b6ed8a
10 llc 0x0000000000bfc8e5
11 llc 0x00000000014806fb
12 llc 0x0000000001480d3d llvm::AsmPrinter::EmitFunctionBody() +
925
13 llc 0x0000000000b6ac79
14 llc 0x00000000015cf517
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 95
15 llc 0x0000000001b1c874
llvm::FPPassManager::runOnFunction(llvm::Function&) + 290
16 llc 0x0000000001b1c9e4
llvm::FPPassManager::runOnModule(llvm::Module&) + 84
17 llc 0x0000000001b1cd38
18 llc 0x0000000001b1d3e2
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 244
19 llc 0x0000000001b1d601
llvm::legacy::PassManager::run(llvm::Module&) + 39
20 llc 0x0000000000a5c14e
21 llc 0x0000000000a5b409 main + 237
22 libc.so.6 0x00007f53d0db776d __libc_start_main + 237
23 llc 0x0000000000a58d79
Stack dump:
0. Program arguments:
/usr/local/google/home/eliben/llvm/build/svn-make-debug/Debug+Asserts/bin/llc
-march=nvptx -o z.ptx compute.optimized.ll
1. Running pass 'Function Pass Manager' on module 'compute.optimized.ll'.
2. Running pass 'NVPTX Assembly Printer' on function '@foo'
Aborted (core dumped)
--------------
The crash goes away if verbose asm output is disabled.</pre>
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