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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - After r299770, Assertion failed: (New->getType() == getType() && "replaceAllUses of value with new value of different type!"), function doRAUW, file lib/IR/Value.cpp, line 375."
href="https://bugs.llvm.org/show_bug.cgi?id=36116">36116</a>
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<th>Summary</th>
<td>After r299770, Assertion failed: (New->getType() == getType() && "replaceAllUses of value with new value of different type!"), function doRAUW, file lib/IR/Value.cpp, line 375.
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<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>dimitry@andric.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>As reported in <a href="https://bugs.freebsd.org/225471">https://bugs.freebsd.org/225471</a>, building the FreeBSD
emulators/snes9x port for x86_64 with clang 6.0.0 results in an assertion:
Assertion failed: (New->getType() == getType() && "replaceAllUses of value with
new value of different type!"), function doRAUW, file
/poudriere/jails/head-amd64/usr/src/contrib/llvm/lib/IR/Value.cpp, line 404.
This assertion still occurs with trunk r322755, and bisection shows it has
regressed with <a href="http://reviews.llvm.org/rL299770">http://reviews.llvm.org/rL299770</a> ("Reapply r298620: [LV]
Vectorize GEPs") by Matthew Simpson. (Which was a reapplication of
<a href="https://reviews.llvm.org/rL298620">https://reviews.llvm.org/rL298620</a>.)
Minimized test case:
// clang -cc1 -triple x86_64 -S -O2 -vectorize-loops fxemu-minimized.cpp
struct {
unsigned char *a[];
} b;
unsigned char c;
int d;
void e() {
d = 0;
for (; d < 32; d++)
b.a[d] = &c + ((d & 16) << 1);
}
Note that -vectorize-loops is essential for reproducing the assertion.
As far as I can see, this is *not* a duplicate of <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - clang crashes on valid code at -O2 and -O3 on x86_64-linux-gnu: Assertion `New->getType() == getType() && "replaceAllUses of value with new value of different type!"' failed"
href="show_bug.cgi?id=27969">bug 27969</a>, <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Assertion `New->getType() == getType() && "replaceAllUses of value with new value of different type!"' failed"
href="show_bug.cgi?id=30783">bug 30783</a>, bug
34783 or <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - clang crashes on valid code at -O2 and -O3 on x86_64-linux-gnu: Assertion `New->getType() == getType() && "replaceAllUses of value with new value of different type!"' failed"
href="show_bug.cgi?id=34759">bug 34759</a>, as those are all resolved, and this assertion still occurs
as of 2018-01-27.</pre>
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