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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [DebugInfo@O2][Dexter] Unreachable line stepped onto."
href="https://bugs.llvm.org/show_bug.cgi?id=39187">39187</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[DebugInfo@O2][Dexter] Unreachable line stepped onto.
</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>
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<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>international.phantom@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>aprantl@apple.com, chackz0x12@gmail.com, david.stenberg@ericsson.com, dblaikie@gmail.com, ftee@flametop.co.uk, greg.bedwell@sony.com, jdevlieghere@apple.com, jeremy.morse.llvm@gmail.com, llvm-bugs@lists.llvm.org, paul.robinson@am.sony.com, vsk@apple.com, Wolfgang_Pieb@playstation.sony.com
</td>
</tr>
<tr>
<th>Blocks</th>
<td>38768
</td>
</tr></table>
<p>
<div>
<pre>Spawned from <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [DebugInfo@O2][Dexter] Unreachable line stepped onto after speculating 2 insns"
href="show_bug.cgi?id=38762">bug 38762</a>:
If SimplifyCFGs speculates more than one insn when flattening phi's to selects,
unreached lines and illegal values can be seen. Giving a non-broken case for
context, if you take this test:
--------8<--------
int
main()
{
volatile int foo = 0;
int beards = 0;
if (foo == 4)
beards = 8;
else
beards = 4;
return beards;
}
-------->8--------
When compiled -O2 -g on trunk. It steps onto the unreached branch ("beards =
8;").</pre>
</div>
</p>
<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_NEW "
title="NEW - [meta][DebugInfo] Umbrella bug for poor debug experiences"
href="https://bugs.llvm.org/show_bug.cgi?id=38768">Bug 38768</a>] [meta][DebugInfo] Umbrella bug for poor debug experiences
</li>
</ul>
</div>
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<ul>
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