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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Compiling libx264 (target-cpu i686 +sse): Do not know how to custom type legalize this operation!"
href="https://llvm.org/bugs/show_bug.cgi?id=30298">30298</a>
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<th>Summary</th>
<td>Compiling libx264 (target-cpu i686 +sse): Do not know how to custom type legalize this operation!
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<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>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>new bugs
</td>
</tr>
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<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>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Building libx264 from the FreeBSD ports collection with clang 3.9.0 release, on
a 32-bit host, enabling SSE, results in:
clang -Wshadow -O3 -ffast-math -m32 -O2 -pipe -isystem /usr/local/include
-fstack-protector -fno-strict-aliasing -Wall -I. -I. -isystem
/usr/local/include -O2 -pipe -isystem /usr/local/include -fstack-protector
-fno-strict-aliasing -march=i686 -mfpmath=sse -msse -std=gnu99
-fomit-frame-pointer -fno-tree-vectorize -isystem /usr/local/include -c -o
common/pixel.o common/pixel.c
Do not know how to custom type legalize this operation!
UNREACHABLE executed at
/share/dim/src/freebsd/base/projects/clang390-import/contrib/llvm/lib/Target/X86/X86ISelLowering.cpp:21834!
This also occurs with trunk r280722, but not with 3.8.0 release, so it a
regression.
Minimized test case:
// clang -cc1 -triple i386 -S -target-cpu i686 -target-feature +sse -O2 -w
-vectorize-slp testcase.c
char *a, *b;
e;
static fn1(long long *p1, long long *p2) {
for (;;) {
int c = a[0] - b[0], d = a[1] - b[1];
*p1 += c * c;
*p2 += d * d;
}
}
fn2() { fn1(fn2, &e); }</pre>
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