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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW " title="NEW --- - Segfault when globals reference constants when targeting OSX" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D23779&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=h5jamcC5JQdeR7XjzLS9795aD2VBLRxdCGn219RZW3A&s=StMOUiEKvDMmEh7bxrod6GbLz3xKH28BEmZDumJPNlY&e=">23779</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Segfault when globals reference constants when targeting OSX
</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>All
</td>
</tr>
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<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>Common Code Generator Code
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>alex@crichton.co
</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>The following IR will cause `llc` to segfault when executed with no extra
arguments:
target triple = "x86_64-apple-darwin"
@a = external global i8
@b = internal unnamed_addr constant i8* @a
@c = global i8** @b
Note that if the IR instead targets 64-bit linux the segfault does not happen.
the backtrace given is:
0 llc 0x00000000021f4c36
llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 44
1 llc 0x00000000021f4f4b
2 llc 0x00000000021f3a4c
3 libpthread.so.0 0x00007f7ad0a59340
4 llc 0x0000000000dde9b0
5 llc 0x0000000001894131
6 llc 0x00000000018947b4
7 llc 0x000000000189486a
llvm::AsmPrinter::EmitGlobalConstant(llvm::Constant const*) + 96
8 llc 0x000000000188c853
llvm::AsmPrinter::EmitGlobalVariable(llvm::GlobalVariable const*) + 3241
9 llc 0x000000000188f3cf
llvm::AsmPrinter::doFinalization(llvm::Module&) + 237
10 llc 0x00000000021372f1
llvm::FPPassManager::doFinalization(llvm::Module&) + 83
11 llc 0x00000000021376eb
12 llc 0x0000000002137c1d
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 249
13 llc 0x0000000002137e57
llvm::legacy::PassManager::run(llvm::Module&) + 39
14 llc 0x0000000000c3fea5
15 llc 0x0000000000c3ef50 main + 242
16 libc.so.6 0x00007f7acfa58ec5 __libc_start_main + 245
17 llc 0x0000000000c3bff9
Stack dump:
0. Program arguments: ./Debug+Asserts/bin/llc
/home/alex/bugpoint-reduced-simplified.ll
zsh: segmentation fault (core dumped) ./Debug+Asserts/bin/llc
~/bugpoint-reduced-simplified.ll</pre>
</div>
</p>
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