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<base href="http://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 --- - no front-end error on illegal code, resulting in back-end crash"
href="http://llvm.org/bugs/show_bug.cgi?id=21322">21322</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>no front-end error on illegal code, resulting in back-end crash
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</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>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>warren_ristow@playstation.sony.com
</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 x86 test-case below gets an assertion-failure:
$ cat test.cpp
//////////////// "test.cpp" ////////////////
#include <x86intrin.h>
__m128 vec_right_shift_err_test(__m128 v)
{
return v >> (__m128) { 1.0f, 1.0f };
}
////////////////////////////////////////////
$ clang++ --version
clang version 3.6.0 (trunk 220234)
Target: x86_64-unknown-linux-gnu
Thread model: posix
$ clang++ -c test.cpp
clang: /home/warren/Upstream/llvm/lib/IR/Instructions.cpp:1830:
void llvm::BinaryOperator::init(llvm::Instruction::BinaryOps):
Assertion `(getType()->isIntegerTy() ||
(getType()->isVectorTy() &&
cast<VectorType>(getType())->getElementType()->isIntegerTy())) &&
"Tried to create a shift operation on a non-integral type!"' failed.
...
$
Checking earlier pre-built Clang+LLVM binaries, version 3.2 produced a
user-error (and didn't crash):
$ ~/llvm.3.2/bin/clang++ --version
clang version 3.2 (tags/RELEASE_32/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
$ ~/llvm.3.2/bin/clang++ -c test.cpp
test.cpp:6:14: error: invalid operands to binary expression
('__m128' and '__m128')
return v >> (__m128) { 1.0f, 1.0f };
~ ^ ~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
$
But version 3.3 and later get compiler crashes. I suppose the proper behavior
is to produce an error message, like 3.2 did (and doing that would then prevent
the assertion-failure from triggering).</pre>
</div>
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