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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 --- - Compiler crash with -fprofile-instr-use at -O0"
href="https://llvm.org/bugs/show_bug.cgi?id=31209">31209</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Compiler crash with -fprofile-instr-use at -O0
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</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>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rob.lougher@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=17686" name="attach_17686" title="crashdump">attachment 17686</a> <a href="attachment.cgi?id=17686&action=edit" title="crashdump">[details]</a></span>
crashdump
$ clang --version
clang version 4.0.0 (trunk 288143)
Reduced test-case:
$ cat foo.cpp
void fn1(void) __attribute__((__noreturn__));
void foo(void) {fn1(); }
Text-based IR profile:
$ cat profile.txt
# IR level Instrumentation Flag
:ir
_Z3foov
# Func Hash:
12884901887
# Num Counters:
1
# Counter Values:
0
Steps to reproduce crash:
$ llvm-profdata merge profile.txt --output=out.profdata
$ clang foo.cpp -O0 -c -fprofile-instr-use=out.profdata
#0 0x000000000367cfc7 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
/llvm/lib/Support/Unix/Signals.inc:402:0
...
(crash dump attached)
The crash does not occur at -O1 or -O2.</pre>
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