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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - InstCombine - Assertion "Cannot convert from scalar to/from vector""
href="https://bugs.llvm.org/show_bug.cgi?id=34841">34841</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>InstCombine - Assertion "Cannot convert from scalar to/from vector"
</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>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</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>babokin@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
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<pre>clang trunk rev 314936, x86_64
<span class="quote">> cat f.cpp</span >
typedef unsigned b __attribute__((ext_vector_type(2)));
b c;
void d() {
b a(4 << 1 / ~(1 - 4 | c));
0 >> a - 4;
}
<span class="quote">> clang++ -c -O2 -w f.cpp</span >
clang-6.0: /home/dybaboki/llvm/llvm-trunk-20171004/lib/IR/Constants.cpp:1575:
static llvm::Constant *llvm::ConstantExpr::getZExt(llvm::Constant *, llvm::Type
*, bool): Assertion `(fromVec == toVec) && "Cannot convert from scalar to/from
vector"' failed.
#0 0x000000000135083f llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/dybaboki/llvm/bin-trunk-20171004/bin/clang-6.0+0x135083f)
#1 0x0000000001350b46 SignalHandler(int)
(/home/dybaboki/llvm/bin-trunk-20171004/bin/clang-6.0+0x1350b46)
#2 0x00007f1e0819f370 __restore_rt (/lib64/libpthread.so.0+0xf370)
#3 0x00007f1e06d1b1d7 __GI_raise (/lib64/libc.so.6+0x351d7)
#4 0x00007f1e06d1c8c8 __GI_abort (/lib64/libc.so.6+0x368c8)
#5 0x00007f1e06d14146 __assert_fail_base (/lib64/libc.so.6+0x2e146)
#6 0x00007f1e06d141f2 (/lib64/libc.so.6+0x2e1f2)
#7 0x0000000000e547ba llvm::ConstantExpr::getZExt(llvm::Constant*, llvm::Type*,
bool) (/home/dybaboki/llvm/bin-trunk-20171004/bin/clang-6.0+0xe547ba)
#8 0x0000000001025fe5 llvm::InstCombiner::transformZExtICmp(llvm::ICmpInst*,
llvm::ZExtInst&, bool)
(/home/dybaboki/llvm/bin-trunk-20171004/bin/clang-6.0+0x1025fe5)
#9 0x000000000102691d llvm::InstCombiner::visitZExt(llvm::ZExtInst&)
(/home/dybaboki/llvm/bin-trunk-20171004/bin/clang-6.0+0x102691d)
#10 0x0000000000fed2f3 llvm::InstCombiner::run()
(/home/dybaboki/llvm/bin-trunk-20171004/bin/clang-6.0+0xfed2f3)</pre>
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